LMiC - LMiC LoRa Semtech + Nucleo

Users » pnysten » Code » LMiC

LMiC LoRa Semtech + Nucleo

lmic.cpp@1:d3b7bde3995c, 2015-03-31 (annotated)

Committer:: mluis
Date:: Tue Mar 31 13:36:56 2015 +0000
Revision:: 1:d3b7bde3995c
Parent:: 0:62d1edcc13d1
Child:: 2:bebd6b2e3d18

Updated LMiC to release v1.4 (http://www.zurich.ibm.com/pdf/lrsc/lmic-release-v1.4.zip)

Who changed what in which revision?

User	Revision	Line number	New contents of line
mluis	0:62d1edcc13d1	1	/*******************************************************************************
mluis	1:d3b7bde3995c	2	* Copyright (c) 2014-2015 IBM Corporation.
mluis	0:62d1edcc13d1	3	* All rights reserved. This program and the accompanying materials
mluis	0:62d1edcc13d1	4	* are made available under the terms of the Eclipse Public License v1.0
mluis	0:62d1edcc13d1	5	* which accompanies this distribution, and is available at
mluis	0:62d1edcc13d1	6	* http://www.eclipse.org/legal/epl-v10.html
mluis	0:62d1edcc13d1	7	*
mluis	0:62d1edcc13d1	8	* Contributors:
mluis	0:62d1edcc13d1	9	* IBM Zurich Research Lab - initial API, implementation and documentation
mluis	0:62d1edcc13d1	10	*******************************************************************************/
mluis	0:62d1edcc13d1	11
mluis	1:d3b7bde3995c	12	//! \file
mluis	0:62d1edcc13d1	13	#include "lmic.h"
mluis	0:62d1edcc13d1	14
mluis	1:d3b7bde3995c	15	#if !defined(MINRX_SYMS)
mluis	1:d3b7bde3995c	16	#define MINRX_SYMS 5
mluis	1:d3b7bde3995c	17	#endif // !defined(MINRX_SYMS)
mluis	0:62d1edcc13d1	18	#define PAMBL_SYMS 8
mluis	0:62d1edcc13d1	19	#define PAMBL_FSK 5
mluis	0:62d1edcc13d1	20	#define PRERX_FSK 1
mluis	0:62d1edcc13d1	21	#define RXLEN_FSK (1+5+2)
mluis	0:62d1edcc13d1	22
mluis	0:62d1edcc13d1	23	#define BCN_INTV_osticks sec2osticks(BCN_INTV_sec)
mluis	0:62d1edcc13d1	24	#define TXRX_GUARD_osticks ms2osticks(TXRX_GUARD_ms)
mluis	0:62d1edcc13d1	25	#define JOIN_GUARD_osticks ms2osticks(JOIN_GUARD_ms)
mluis	0:62d1edcc13d1	26	#define DELAY_DNW1_osticks sec2osticks(DELAY_DNW1)
mluis	0:62d1edcc13d1	27	#define DELAY_DNW2_osticks sec2osticks(DELAY_DNW2)
mluis	0:62d1edcc13d1	28	#define DELAY_JACC1_osticks sec2osticks(DELAY_JACC1)
mluis	0:62d1edcc13d1	29	#define DELAY_JACC2_osticks sec2osticks(DELAY_JACC2)
mluis	0:62d1edcc13d1	30	#define DELAY_EXTDNW2_osticks sec2osticks(DELAY_EXTDNW2)
mluis	0:62d1edcc13d1	31	#define BCN_RESERVE_osticks ms2osticks(BCN_RESERVE_ms)
mluis	0:62d1edcc13d1	32	#define BCN_GUARD_osticks ms2osticks(BCN_GUARD_ms)
mluis	0:62d1edcc13d1	33	#define BCN_WINDOW_osticks ms2osticks(BCN_WINDOW_ms)
mluis	0:62d1edcc13d1	34	#define AIRTIME_BCN_osticks us2osticks(AIRTIME_BCN)
mluis	1:d3b7bde3995c	35	#if defined(CFG_eu868)
mluis	1:d3b7bde3995c	36	#define DNW2_SAFETY_ZONE ms2osticks(3000)
mluis	1:d3b7bde3995c	37	#endif
mluis	1:d3b7bde3995c	38	#if defined(CFG_us915)
mluis	1:d3b7bde3995c	39	#define DNW2_SAFETY_ZONE ms2osticks(750)
mluis	1:d3b7bde3995c	40	#endif
mluis	1:d3b7bde3995c	41
mluis	1:d3b7bde3995c	42	// Special APIs - for development or testing
mluis	1:d3b7bde3995c	43	#define isTESTMODE() 0
mluis	0:62d1edcc13d1	44
mluis	0:62d1edcc13d1	45	DEFINE_LMIC;
mluis	0:62d1edcc13d1	46	DECL_ON_LMIC_EVENT;
mluis	0:62d1edcc13d1	47
mluis	0:62d1edcc13d1	48
mluis	0:62d1edcc13d1	49	// Fwd decls.
mluis	0:62d1edcc13d1	50	static void engineUpdate(void);
mluis	0:62d1edcc13d1	51	static void startScan (void);
mluis	0:62d1edcc13d1	52
mluis	0:62d1edcc13d1	53
mluis	0:62d1edcc13d1	54	// ================================================================================
mluis	0:62d1edcc13d1	55	// BEG OS - default implementations for certain OS suport functions
mluis	0:62d1edcc13d1	56
mluis	1:d3b7bde3995c	57	#if !defined(HAS_os_calls)
mluis	0:62d1edcc13d1	58
mluis	1:d3b7bde3995c	59	#if !defined(os_rlsbf2)
mluis	0:62d1edcc13d1	60	u2_t os_rlsbf2 (xref2cu1_t buf) {
mluis	0:62d1edcc13d1	61	return (u2_t)(buf[0] \| (buf[1]<<8));
mluis	0:62d1edcc13d1	62	}
mluis	0:62d1edcc13d1	63	#endif
mluis	0:62d1edcc13d1	64
mluis	1:d3b7bde3995c	65	#if !defined(os_rlsbf4)
mluis	0:62d1edcc13d1	66	u4_t os_rlsbf4 (xref2cu1_t buf) {
mluis	0:62d1edcc13d1	67	return (u4_t)(buf[0] \| (buf[1]<<8) \| ((u4_t)buf[2]<<16) \| ((u4_t)buf[3]<<24));
mluis	0:62d1edcc13d1	68	}
mluis	0:62d1edcc13d1	69	#endif
mluis	0:62d1edcc13d1	70
mluis	0:62d1edcc13d1	71
mluis	1:d3b7bde3995c	72	#if !defined(os_rmsbf4)
mluis	0:62d1edcc13d1	73	u4_t os_rmsbf4 (xref2cu1_t buf) {
mluis	0:62d1edcc13d1	74	return (u4_t)(buf[3] \| (buf[2]<<8) \| ((u4_t)buf[1]<<16) \| ((u4_t)buf[0]<<24));
mluis	0:62d1edcc13d1	75	}
mluis	0:62d1edcc13d1	76	#endif
mluis	0:62d1edcc13d1	77
mluis	0:62d1edcc13d1	78
mluis	1:d3b7bde3995c	79	#if !defined(os_wlsbf2)
mluis	0:62d1edcc13d1	80	void os_wlsbf2 (xref2u1_t buf, u2_t v) {
mluis	0:62d1edcc13d1	81	buf[0] = v;
mluis	0:62d1edcc13d1	82	buf[1] = v>>8;
mluis	0:62d1edcc13d1	83	}
mluis	0:62d1edcc13d1	84	#endif
mluis	0:62d1edcc13d1	85
mluis	1:d3b7bde3995c	86	#if !defined(os_wlsbf4)
mluis	0:62d1edcc13d1	87	void os_wlsbf4 (xref2u1_t buf, u4_t v) {
mluis	0:62d1edcc13d1	88	buf[0] = v;
mluis	0:62d1edcc13d1	89	buf[1] = v>>8;
mluis	0:62d1edcc13d1	90	buf[2] = v>>16;
mluis	0:62d1edcc13d1	91	buf[3] = v>>24;
mluis	0:62d1edcc13d1	92	}
mluis	0:62d1edcc13d1	93	#endif
mluis	0:62d1edcc13d1	94
mluis	1:d3b7bde3995c	95	#if !defined(os_wmsbf4)
mluis	0:62d1edcc13d1	96	void os_wmsbf4 (xref2u1_t buf, u4_t v) {
mluis	0:62d1edcc13d1	97	buf[3] = v;
mluis	0:62d1edcc13d1	98	buf[2] = v>>8;
mluis	0:62d1edcc13d1	99	buf[1] = v>>16;
mluis	0:62d1edcc13d1	100	buf[0] = v>>24;
mluis	0:62d1edcc13d1	101	}
mluis	0:62d1edcc13d1	102	#endif
mluis	0:62d1edcc13d1	103
mluis	1:d3b7bde3995c	104	#if !defined(os_getBattLevel)
mluis	0:62d1edcc13d1	105	u1_t os_getBattLevel (void) {
mluis	0:62d1edcc13d1	106	return MCMD_DEVS_BATT_NOINFO;
mluis	0:62d1edcc13d1	107	}
mluis	0:62d1edcc13d1	108	#endif
mluis	0:62d1edcc13d1	109
mluis	1:d3b7bde3995c	110	#if !defined(os_crc16)
mluis	1:d3b7bde3995c	111	// New CRC-16 CCITT(XMODEM) checksum for beacons:
mluis	0:62d1edcc13d1	112	u2_t os_crc16 (xref2u1_t data, uint len) {
mluis	1:d3b7bde3995c	113	u2_t remainder = 0;
mluis	1:d3b7bde3995c	114	u2_t polynomial = 0x1021;
mluis	1:d3b7bde3995c	115	for( uint i = 0; i < len; i++ ) {
mluis	1:d3b7bde3995c	116	remainder ^= data[i] << 8;
mluis	1:d3b7bde3995c	117	for( u1_t bit = 8; bit > 0; bit--) {
mluis	1:d3b7bde3995c	118	if( (remainder & 0x8000) )
mluis	1:d3b7bde3995c	119	remainder = (remainder << 1) ^ polynomial;
mluis	1:d3b7bde3995c	120	else
mluis	1:d3b7bde3995c	121	remainder <<= 1;
mluis	1:d3b7bde3995c	122	}
mluis	0:62d1edcc13d1	123	}
mluis	1:d3b7bde3995c	124	return remainder;
mluis	0:62d1edcc13d1	125	}
mluis	0:62d1edcc13d1	126	#endif
mluis	0:62d1edcc13d1	127
mluis	0:62d1edcc13d1	128	#endif // !HAS_os_calls
mluis	0:62d1edcc13d1	129
mluis	0:62d1edcc13d1	130	// END OS - default implementations for certain OS suport functions
mluis	0:62d1edcc13d1	131	// ================================================================================
mluis	0:62d1edcc13d1	132
mluis	0:62d1edcc13d1	133	// ================================================================================
mluis	0:62d1edcc13d1	134	// BEG AES
mluis	0:62d1edcc13d1	135
mluis	0:62d1edcc13d1	136	static void micB0 (u4_t devaddr, u4_t seqno, int dndir, int len) {
mluis	0:62d1edcc13d1	137	os_clearMem(AESaux,16);
mluis	0:62d1edcc13d1	138	AESaux[0] = 0x49;
mluis	0:62d1edcc13d1	139	AESaux[5] = dndir?1:0;
mluis	0:62d1edcc13d1	140	AESaux[15] = len;
mluis	0:62d1edcc13d1	141	os_wlsbf4(AESaux+ 6,devaddr);
mluis	0:62d1edcc13d1	142	os_wlsbf4(AESaux+10,seqno);
mluis	0:62d1edcc13d1	143	}
mluis	0:62d1edcc13d1	144
mluis	0:62d1edcc13d1	145
mluis	0:62d1edcc13d1	146	static int aes_verifyMic (xref2cu1_t key, u4_t devaddr, u4_t seqno, int dndir, xref2u1_t pdu, int len) {
mluis	0:62d1edcc13d1	147	micB0(devaddr, seqno, dndir, len);
mluis	0:62d1edcc13d1	148	os_copyMem(AESkey,key,16);
mluis	0:62d1edcc13d1	149	return os_aes(AES_MIC, pdu, len) == os_rmsbf4(pdu+len);
mluis	0:62d1edcc13d1	150	}
mluis	0:62d1edcc13d1	151
mluis	0:62d1edcc13d1	152
mluis	0:62d1edcc13d1	153	static void aes_appendMic (xref2cu1_t key, u4_t devaddr, u4_t seqno, int dndir, xref2u1_t pdu, int len) {
mluis	0:62d1edcc13d1	154	micB0(devaddr, seqno, dndir, len);
mluis	0:62d1edcc13d1	155	os_copyMem(AESkey,key,16);
mluis	0:62d1edcc13d1	156	// MSB because of internal structure of AES
mluis	0:62d1edcc13d1	157	os_wmsbf4(pdu+len, os_aes(AES_MIC, pdu, len));
mluis	0:62d1edcc13d1	158	}
mluis	0:62d1edcc13d1	159
mluis	0:62d1edcc13d1	160
mluis	0:62d1edcc13d1	161	static void aes_appendMic0 (xref2u1_t pdu, int len) {
mluis	0:62d1edcc13d1	162	os_getDevKey(AESkey);
mluis	0:62d1edcc13d1	163	os_wmsbf4(pdu+len, os_aes(AES_MIC\|AES_MICNOAUX, pdu, len)); // MSB because of internal structure of AES
mluis	0:62d1edcc13d1	164	}
mluis	0:62d1edcc13d1	165
mluis	0:62d1edcc13d1	166
mluis	0:62d1edcc13d1	167	static int aes_verifyMic0 (xref2u1_t pdu, int len) {
mluis	0:62d1edcc13d1	168	os_getDevKey(AESkey);
mluis	0:62d1edcc13d1	169	return os_aes(AES_MIC\|AES_MICNOAUX, pdu, len) == os_rmsbf4(pdu+len);
mluis	0:62d1edcc13d1	170	}
mluis	0:62d1edcc13d1	171
mluis	0:62d1edcc13d1	172
mluis	0:62d1edcc13d1	173	static void aes_encrypt (xref2u1_t pdu, int len) {
mluis	0:62d1edcc13d1	174	os_getDevKey(AESkey);
mluis	0:62d1edcc13d1	175	os_aes(AES_ENC, pdu, len);
mluis	0:62d1edcc13d1	176	}
mluis	0:62d1edcc13d1	177
mluis	0:62d1edcc13d1	178
mluis	0:62d1edcc13d1	179	static void aes_cipher (xref2cu1_t key, u4_t devaddr, u4_t seqno, int dndir, xref2u1_t payload, int len) {
mluis	0:62d1edcc13d1	180	if( len <= 0 )
mluis	1:d3b7bde3995c	181	return;
mluis	0:62d1edcc13d1	182	os_clearMem(AESaux, 16);
mluis	0:62d1edcc13d1	183	AESaux[0] = AESaux[15] = 1; // mode=cipher / dir=down / block counter=1
mluis	0:62d1edcc13d1	184	AESaux[5] = dndir?1:0;
mluis	0:62d1edcc13d1	185	os_wlsbf4(AESaux+ 6,devaddr);
mluis	0:62d1edcc13d1	186	os_wlsbf4(AESaux+10,seqno);
mluis	0:62d1edcc13d1	187	os_copyMem(AESkey,key,16);
mluis	0:62d1edcc13d1	188	os_aes(AES_CTR, payload, len);
mluis	0:62d1edcc13d1	189	}
mluis	0:62d1edcc13d1	190
mluis	0:62d1edcc13d1	191
mluis	0:62d1edcc13d1	192	static void aes_sessKeys (u2_t devnonce, xref2cu1_t artnonce, xref2u1_t nwkkey, xref2u1_t artkey) {
mluis	0:62d1edcc13d1	193	os_clearMem(nwkkey, 16);
mluis	0:62d1edcc13d1	194	nwkkey[0] = 0x01;
mluis	0:62d1edcc13d1	195	os_copyMem(nwkkey+1, artnonce, LEN_ARTNONCE+LEN_NETID);
mluis	0:62d1edcc13d1	196	os_wlsbf2(nwkkey+1+LEN_ARTNONCE+LEN_NETID, devnonce);
mluis	0:62d1edcc13d1	197	os_copyMem(artkey, nwkkey, 16);
mluis	0:62d1edcc13d1	198	artkey[0] = 0x02;
mluis	0:62d1edcc13d1	199
mluis	0:62d1edcc13d1	200	os_getDevKey(AESkey);
mluis	0:62d1edcc13d1	201	os_aes(AES_ENC, nwkkey, 16);
mluis	0:62d1edcc13d1	202	os_getDevKey(AESkey);
mluis	0:62d1edcc13d1	203	os_aes(AES_ENC, artkey, 16);
mluis	0:62d1edcc13d1	204	}
mluis	0:62d1edcc13d1	205
mluis	0:62d1edcc13d1	206	// END AES
mluis	0:62d1edcc13d1	207	// ================================================================================
mluis	0:62d1edcc13d1	208
mluis	0:62d1edcc13d1	209
mluis	0:62d1edcc13d1	210	// ================================================================================
mluis	0:62d1edcc13d1	211	// BEG LORA
mluis	0:62d1edcc13d1	212
mluis	1:d3b7bde3995c	213	#if defined(CFG_eu868) // ========================================
mluis	0:62d1edcc13d1	214
mluis	0:62d1edcc13d1	215	#define maxFrameLen(dr) ((dr)<=DR_SF9 ? maxFrameLens[(dr)] : 0xFF)
mluis	0:62d1edcc13d1	216	const u1_t maxFrameLens [] = { 64,64,64,123 };
mluis	0:62d1edcc13d1	217
mluis	0:62d1edcc13d1	218	const u1_t _DR2RPS_CRC[] = {
mluis	0:62d1edcc13d1	219	ILLEGAL_RPS,
mluis	0:62d1edcc13d1	220	(u1_t)MAKERPS(SF12, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	221	(u1_t)MAKERPS(SF11, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	222	(u1_t)MAKERPS(SF10, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	223	(u1_t)MAKERPS(SF9, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	224	(u1_t)MAKERPS(SF8, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	225	(u1_t)MAKERPS(SF7, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	226	(u1_t)MAKERPS(SF7, BW250, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	227	(u1_t)MAKERPS(FSK, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	228	ILLEGAL_RPS
mluis	0:62d1edcc13d1	229	};
mluis	0:62d1edcc13d1	230
mluis	0:62d1edcc13d1	231	static const s1_t TXPOWLEVELS[] = {
mluis	0:62d1edcc13d1	232	20, 14, 11, 8, 5, 2, 0,0, 0,0,0,0, 0,0,0,0
mluis	0:62d1edcc13d1	233	};
mluis	0:62d1edcc13d1	234	#define pow2dBm(mcmd_ladr_p1) (TXPOWLEVELS[(mcmd_ladr_p1&MCMD_LADR_POW_MASK)>>MCMD_LADR_POW_SHIFT])
mluis	0:62d1edcc13d1	235
mluis	1:d3b7bde3995c	236	#elif defined(CFG_us915) // ========================================
mluis	0:62d1edcc13d1	237
mluis	0:62d1edcc13d1	238	#define maxFrameLen(dr) ((dr)<=DR_SF11CR ? maxFrameLens[(dr)] : 0xFF)
mluis	0:62d1edcc13d1	239	const u1_t maxFrameLens [] = { 24,66,142,255,255,255,255,255, 66,142 };
mluis	0:62d1edcc13d1	240
mluis	0:62d1edcc13d1	241	const u1_t _DR2RPS_CRC[] = {
mluis	0:62d1edcc13d1	242	ILLEGAL_RPS,
mluis	0:62d1edcc13d1	243	MAKERPS(SF10, BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	244	MAKERPS(SF9 , BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	245	MAKERPS(SF8 , BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	246	MAKERPS(SF7 , BW125, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	247	MAKERPS(SF8 , BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	248	ILLEGAL_RPS ,
mluis	0:62d1edcc13d1	249	ILLEGAL_RPS ,
mluis	0:62d1edcc13d1	250	ILLEGAL_RPS ,
mluis	0:62d1edcc13d1	251	MAKERPS(SF12, BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	252	MAKERPS(SF11, BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	253	MAKERPS(SF10, BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	254	MAKERPS(SF9 , BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	255	MAKERPS(SF8 , BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	256	MAKERPS(SF7 , BW500, CR_4_5, 0, 0),
mluis	0:62d1edcc13d1	257	ILLEGAL_RPS
mluis	0:62d1edcc13d1	258	};
mluis	0:62d1edcc13d1	259
mluis	0:62d1edcc13d1	260	#define pow2dBm(mcmd_ladr_p1) ((s1_t)(30 - (((mcmd_ladr_p1)&MCMD_LADR_POW_MASK)<<1)))
mluis	0:62d1edcc13d1	261
mluis	0:62d1edcc13d1	262	#endif // ================================================
mluis	0:62d1edcc13d1	263
mluis	0:62d1edcc13d1	264	static const u1_t SENSITIVITY[7][3] = {
mluis	0:62d1edcc13d1	265	// ------------bw----------
mluis	0:62d1edcc13d1	266	// 125kHz 250kHz 500kHz
mluis	0:62d1edcc13d1	267	{ 141-109, 141-109, 141-109 }, // FSK
mluis	0:62d1edcc13d1	268	{ 141-127, 141-124, 141-121 }, // SF7
mluis	0:62d1edcc13d1	269	{ 141-129, 141-126, 141-123 }, // SF8
mluis	0:62d1edcc13d1	270	{ 141-132, 141-129, 141-126 }, // SF9
mluis	0:62d1edcc13d1	271	{ 141-135, 141-132, 141-129 }, // SF10
mluis	0:62d1edcc13d1	272	{ 141-138, 141-135, 141-132 }, // SF11
mluis	0:62d1edcc13d1	273	{ 141-141, 141-138, 141-135 } // SF12
mluis	0:62d1edcc13d1	274	};
mluis	0:62d1edcc13d1	275
mluis	0:62d1edcc13d1	276	int getSensitivity (rps_t rps) {
mluis	0:62d1edcc13d1	277	return -141 + SENSITIVITY[getSf(rps)][getBw(rps)];
mluis	0:62d1edcc13d1	278	}
mluis	0:62d1edcc13d1	279
mluis	0:62d1edcc13d1	280	ostime_t calcAirTime (rps_t rps, u1_t plen) {
mluis	0:62d1edcc13d1	281	u1_t bw = getBw(rps); // 0,1,2 = 125,250,500kHz
mluis	0:62d1edcc13d1	282	u1_t sf = getSf(rps); // 0=FSK, 1..6 = SF7..12
mluis	0:62d1edcc13d1	283	if( sf == FSK ) {
mluis	1:d3b7bde3995c	284	return (plen+/preamble/5+/syncword/3+/len/1+/crc/2) * /bits/byte/8
mluis	1:d3b7bde3995c	285	* (s4_t)OSTICKS_PER_SEC / /kbit/s/50000;
mluis	0:62d1edcc13d1	286	}
mluis	0:62d1edcc13d1	287	u1_t sfx = 4*(sf+(7-SF7));
mluis	0:62d1edcc13d1	288	u1_t q = sfx - (sf >= SF11 ? 8 : 0);
mluis	0:62d1edcc13d1	289	int tmp = 8*plen - sfx + 28 + (getNocrc(rps)?0:16) - (getIh(rps)?20:0);
mluis	0:62d1edcc13d1	290	if( tmp > 0 ) {
mluis	1:d3b7bde3995c	291	tmp = (tmp + q - 1) / q;
mluis	1:d3b7bde3995c	292	tmp *= getCr(rps)+5;
mluis	1:d3b7bde3995c	293	tmp += 8;
mluis	0:62d1edcc13d1	294	} else {
mluis	1:d3b7bde3995c	295	tmp = 8;
mluis	0:62d1edcc13d1	296	}
mluis	0:62d1edcc13d1	297	tmp = (tmp<<2) + /preamble/49 /* 4 * (8 + 4.25) */;
mluis	0:62d1edcc13d1	298	// bw = 125000 = 15625 * 2^3
mluis	0:62d1edcc13d1	299	// 250000 = 15625 * 2^4
mluis	0:62d1edcc13d1	300	// 500000 = 15625 * 2^5
mluis	0:62d1edcc13d1	301	// sf = 7..12
mluis	0:62d1edcc13d1	302	//
mluis	0:62d1edcc13d1	303	// osticks = tmp * OSTICKS_PER_SEC * 1<<sf / bw
mluis	0:62d1edcc13d1	304	//
mluis	0:62d1edcc13d1	305	// 3 => counter reduced divisor 125000/8 => 15625
mluis	0:62d1edcc13d1	306	// 2 => counter 2 shift on tmp
mluis	0:62d1edcc13d1	307	sfx = sf+(7-SF7) - (3+2) - bw;
mluis	0:62d1edcc13d1	308	int div = 15625;
mluis	0:62d1edcc13d1	309	if( sfx > 4 ) {
mluis	1:d3b7bde3995c	310	// prevent 32bit signed int overflow in last step
mluis	1:d3b7bde3995c	311	div >>= sfx-4;
mluis	1:d3b7bde3995c	312	sfx = 4;
mluis	0:62d1edcc13d1	313	}
mluis	0:62d1edcc13d1	314	// Need 32bit arithmetic for this last step
mluis	0:62d1edcc13d1	315	return (((ostime_t)tmp << sfx) * OSTICKS_PER_SEC + div/2) / div;
mluis	0:62d1edcc13d1	316	}
mluis	0:62d1edcc13d1	317
mluis	0:62d1edcc13d1	318	extern inline s1_t rssi2s1 (int v);
mluis	0:62d1edcc13d1	319	extern inline int s12rssi (s1_t v);
mluis	0:62d1edcc13d1	320	extern inline float s12snr (s1_t v);
mluis	0:62d1edcc13d1	321	extern inline s1_t snr2s1 (double v);
mluis	0:62d1edcc13d1	322
mluis	0:62d1edcc13d1	323	extern inline rps_t updr2rps (dr_t dr);
mluis	0:62d1edcc13d1	324	extern inline rps_t dndr2rps (dr_t dr);
mluis	0:62d1edcc13d1	325	extern inline int isFasterDR (dr_t dr1, dr_t dr2);
mluis	0:62d1edcc13d1	326	extern inline int isSlowerDR (dr_t dr1, dr_t dr2);
mluis	0:62d1edcc13d1	327	extern inline dr_t incDR (dr_t dr);
mluis	0:62d1edcc13d1	328	extern inline dr_t decDR (dr_t dr);
mluis	0:62d1edcc13d1	329	extern inline dr_t assertDR (dr_t dr);
mluis	0:62d1edcc13d1	330	extern inline dr_t validDR (dr_t dr);
mluis	0:62d1edcc13d1	331	extern inline dr_t lowerDR (dr_t dr, u1_t n);
mluis	0:62d1edcc13d1	332
mluis	0:62d1edcc13d1	333	extern inline sf_t getSf (rps_t params);
mluis	0:62d1edcc13d1	334	extern inline rps_t setSf (rps_t params, sf_t sf);
mluis	0:62d1edcc13d1	335	extern inline bw_t getBw (rps_t params);
mluis	0:62d1edcc13d1	336	extern inline rps_t setBw (rps_t params, bw_t cr);
mluis	0:62d1edcc13d1	337	extern inline cr_t getCr (rps_t params);
mluis	0:62d1edcc13d1	338	extern inline rps_t setCr (rps_t params, cr_t cr);
mluis	0:62d1edcc13d1	339	extern inline int getNocrc (rps_t params);
mluis	0:62d1edcc13d1	340	extern inline rps_t setNocrc (rps_t params, int nocrc);
mluis	0:62d1edcc13d1	341	extern inline int getIh (rps_t params);
mluis	0:62d1edcc13d1	342	extern inline rps_t setIh (rps_t params, int ih);
mluis	0:62d1edcc13d1	343	extern inline rps_t makeRps (sf_t sf, bw_t bw, cr_t cr, int ih, int nocrc);
mluis	0:62d1edcc13d1	344	extern inline int sameSfBw (rps_t r1, rps_t r2);
mluis	0:62d1edcc13d1	345
mluis	0:62d1edcc13d1	346	// END LORA
mluis	0:62d1edcc13d1	347	// ================================================================================
mluis	0:62d1edcc13d1	348
mluis	0:62d1edcc13d1	349
mluis	0:62d1edcc13d1	350	// Adjust DR for TX retries
mluis	0:62d1edcc13d1	351	// - indexed by retry count
mluis	0:62d1edcc13d1	352	// - return steps to lower DR
mluis	0:62d1edcc13d1	353	static const u1_t DRADJUST[2+TXCONF_ATTEMPTS] = {
mluis	0:62d1edcc13d1	354	// normal frames - 1st try / no retry
mluis	0:62d1edcc13d1	355	0,
mluis	0:62d1edcc13d1	356	// confirmed frames
mluis	1:d3b7bde3995c	357	0,0,1,0,1,0,1,0,0
mluis	0:62d1edcc13d1	358	};
mluis	0:62d1edcc13d1	359
mluis	0:62d1edcc13d1	360
mluis	0:62d1edcc13d1	361	// Table below defines the size of one symbol as
mluis	0:62d1edcc13d1	362	// symtime = 256us * 2^T(sf,bw)
mluis	0:62d1edcc13d1	363	// 256us is called one symunit.
mluis	1:d3b7bde3995c	364	// SF:
mluis	1:d3b7bde3995c	365	// BW: \|__7___8___9__10__11__12
mluis	1:d3b7bde3995c	366	// 125kHz \| 2 3 4 5 6 7
mluis	1:d3b7bde3995c	367	// 250kHz \| 1 2 3 4 5 6
mluis	1:d3b7bde3995c	368	// 500kHz \| 0 1 2 3 4 5
mluis	0:62d1edcc13d1	369	//
mluis	0:62d1edcc13d1	370	// Times for half symbol per DR
mluis	0:62d1edcc13d1	371	// Per DR table to minimize rounding errors
mluis	0:62d1edcc13d1	372	static const ostime_t DR2HSYM_osticks[] = {
mluis	1:d3b7bde3995c	373	#if defined(CFG_eu868)
mluis	0:62d1edcc13d1	374	#define dr2hsym(dr) (DR2HSYM_osticks[(dr)])
mluis	0:62d1edcc13d1	375	us2osticksRound(128<<7), // DR_SF12
mluis	0:62d1edcc13d1	376	us2osticksRound(128<<6), // DR_SF11
mluis	0:62d1edcc13d1	377	us2osticksRound(128<<5), // DR_SF10
mluis	0:62d1edcc13d1	378	us2osticksRound(128<<4), // DR_SF9
mluis	0:62d1edcc13d1	379	us2osticksRound(128<<3), // DR_SF8
mluis	0:62d1edcc13d1	380	us2osticksRound(128<<2), // DR_SF7
mluis	0:62d1edcc13d1	381	us2osticksRound(128<<1), // DR_SF7B
mluis	0:62d1edcc13d1	382	us2osticksRound(80) // FSK -- not used (time for 1/2 byte)
mluis	1:d3b7bde3995c	383	#elif defined(CFG_us915)
mluis	0:62d1edcc13d1	384	#define dr2hsym(dr) (DR2HSYM_osticks[(dr)&7]) // map DR_SFnCR -> 0-6
mluis	0:62d1edcc13d1	385	us2osticksRound(128<<5), // DR_SF10 DR_SF12CR
mluis	0:62d1edcc13d1	386	us2osticksRound(128<<4), // DR_SF9 DR_SF11CR
mluis	0:62d1edcc13d1	387	us2osticksRound(128<<3), // DR_SF8 DR_SF10CR
mluis	0:62d1edcc13d1	388	us2osticksRound(128<<2), // DR_SF7 DR_SF9CR
mluis	0:62d1edcc13d1	389	us2osticksRound(128<<1), // DR_SF8C DR_SF8CR
mluis	0:62d1edcc13d1	390	us2osticksRound(128<<0) // ------ DR_SF7CR
mluis	0:62d1edcc13d1	391	#endif
mluis	0:62d1edcc13d1	392	};
mluis	0:62d1edcc13d1	393
mluis	0:62d1edcc13d1	394
mluis	0:62d1edcc13d1	395	static ostime_t calcRxWindow (u1_t secs, dr_t dr) {
mluis	0:62d1edcc13d1	396	ostime_t rxoff, err;
mluis	0:62d1edcc13d1	397	if( secs==0 ) {
mluis	1:d3b7bde3995c	398	// aka 128 secs (next becaon)
mluis	1:d3b7bde3995c	399	rxoff = LMIC.drift;
mluis	1:d3b7bde3995c	400	err = LMIC.lastDriftDiff;
mluis	0:62d1edcc13d1	401	} else {
mluis	1:d3b7bde3995c	402	// scheduled RX window within secs into current beacon period
mluis	1:d3b7bde3995c	403	rxoff = (LMIC.drift * (ostime_t)secs) >> BCN_INTV_exp;
mluis	1:d3b7bde3995c	404	err = (LMIC.lastDriftDiff * (ostime_t)secs) >> BCN_INTV_exp;
mluis	0:62d1edcc13d1	405	}
mluis	0:62d1edcc13d1	406	u1_t rxsyms = MINRX_SYMS;
mluis	0:62d1edcc13d1	407	err += (ostime_t)LMIC.maxDriftDiff * LMIC.missedBcns;
mluis	0:62d1edcc13d1	408	LMIC.rxsyms = MINRX_SYMS + (err / dr2hsym(dr));
mluis	0:62d1edcc13d1	409
mluis	0:62d1edcc13d1	410	return (rxsyms-PAMBL_SYMS) * dr2hsym(dr) + rxoff;
mluis	0:62d1edcc13d1	411	}
mluis	0:62d1edcc13d1	412
mluis	0:62d1edcc13d1	413
mluis	0:62d1edcc13d1	414	// Setup beacon RX parameters assuming we have an error of ms (aka +/-(ms/2))
mluis	0:62d1edcc13d1	415	static void calcBcnRxWindowFromMillis (u1_t ms, bit_t ini) {
mluis	0:62d1edcc13d1	416	if( ini ) {
mluis	1:d3b7bde3995c	417	LMIC.drift = 0;
mluis	1:d3b7bde3995c	418	LMIC.maxDriftDiff = 0;
mluis	1:d3b7bde3995c	419	LMIC.missedBcns = 0;
mluis	1:d3b7bde3995c	420	LMIC.bcninfo.flags \|= BCN_NODRIFT\|BCN_NODDIFF;
mluis	0:62d1edcc13d1	421	}
mluis	0:62d1edcc13d1	422	ostime_t hsym = dr2hsym(DR_BCN);
mluis	0:62d1edcc13d1	423	LMIC.bcnRxsyms = MINRX_SYMS + ms2osticksCeil(ms) / hsym;
mluis	0:62d1edcc13d1	424	LMIC.bcnRxtime = LMIC.bcninfo.txtime + BCN_INTV_osticks - (LMIC.bcnRxsyms-PAMBL_SYMS) * hsym;
mluis	0:62d1edcc13d1	425	}
mluis	0:62d1edcc13d1	426
mluis	0:62d1edcc13d1	427
mluis	0:62d1edcc13d1	428	// Setup scheduled RX window (ping/multicast slot)
mluis	0:62d1edcc13d1	429	static void rxschedInit (xref2rxsched_t rxsched) {
mluis	0:62d1edcc13d1	430	os_clearMem(AESkey,16);
mluis	0:62d1edcc13d1	431	os_clearMem(LMIC.frame+8,8);
mluis	0:62d1edcc13d1	432	os_wlsbf4(LMIC.frame, LMIC.bcninfo.time);
mluis	0:62d1edcc13d1	433	os_wlsbf4(LMIC.frame+4, LMIC.devaddr);
mluis	0:62d1edcc13d1	434	os_aes(AES_ENC,LMIC.frame,16);
mluis	0:62d1edcc13d1	435	u1_t intvExp = rxsched->intvExp;
mluis	0:62d1edcc13d1	436	ostime_t off = os_rlsbf2(LMIC.frame) & (0x0FFF >> (7 - intvExp)); // random offset (slot units)
mluis	0:62d1edcc13d1	437	rxsched->rxbase = (LMIC.bcninfo.txtime +
mluis	1:d3b7bde3995c	438	BCN_RESERVE_osticks +
mluis	1:d3b7bde3995c	439	ms2osticks(BCN_SLOT_SPAN_ms * off)); // random offset osticks
mluis	0:62d1edcc13d1	440	rxsched->slot = 0;
mluis	0:62d1edcc13d1	441	rxsched->rxtime = rxsched->rxbase - calcRxWindow(/secs BCN_RESERVE/2+(1<<intvExp),rxsched->dr);
mluis	0:62d1edcc13d1	442	rxsched->rxsyms = LMIC.rxsyms;
mluis	0:62d1edcc13d1	443	}
mluis	0:62d1edcc13d1	444
mluis	0:62d1edcc13d1	445
mluis	0:62d1edcc13d1	446	static bit_t rxschedNext (xref2rxsched_t rxsched, ostime_t cando) {
mluis	0:62d1edcc13d1	447	again:
mluis	0:62d1edcc13d1	448	if( rxsched->rxtime - cando >= 0 )
mluis	1:d3b7bde3995c	449	return 1;
mluis	0:62d1edcc13d1	450	u1_t slot;
mluis	0:62d1edcc13d1	451	if( (slot=rxsched->slot) >= 128 )
mluis	1:d3b7bde3995c	452	return 0;
mluis	0:62d1edcc13d1	453	u1_t intv = 1<<rxsched->intvExp;
mluis	0:62d1edcc13d1	454	if( (rxsched->slot = (slot += (intv))) >= 128 )
mluis	1:d3b7bde3995c	455	return 0;
mluis	0:62d1edcc13d1	456	rxsched->rxtime = rxsched->rxbase
mluis	1:d3b7bde3995c	457	+ ((BCN_WINDOW_osticks * (ostime_t)slot) >> BCN_INTV_exp)
mluis	1:d3b7bde3995c	458	- calcRxWindow(/secs BCN_RESERVE/2+slot+intv,rxsched->dr);
mluis	0:62d1edcc13d1	459	rxsched->rxsyms = LMIC.rxsyms;
mluis	0:62d1edcc13d1	460	goto again;
mluis	0:62d1edcc13d1	461	}
mluis	0:62d1edcc13d1	462
mluis	0:62d1edcc13d1	463
mluis	0:62d1edcc13d1	464	static ostime_t rndDelay (u1_t secSpan) {
mluis	0:62d1edcc13d1	465	u2_t r = os_getRndU2();
mluis	0:62d1edcc13d1	466	ostime_t delay = r;
mluis	0:62d1edcc13d1	467	if( delay > OSTICKS_PER_SEC )
mluis	1:d3b7bde3995c	468	delay = r % (u2_t)OSTICKS_PER_SEC;
mluis	0:62d1edcc13d1	469	if( secSpan > 0 )
mluis	1:d3b7bde3995c	470	delay += ((u1_t)r % secSpan) * OSTICKS_PER_SEC;
mluis	0:62d1edcc13d1	471	return delay;
mluis	0:62d1edcc13d1	472	}
mluis	0:62d1edcc13d1	473
mluis	0:62d1edcc13d1	474
mluis	0:62d1edcc13d1	475	static void txDelay (ostime_t reftime, u1_t secSpan) {
mluis	0:62d1edcc13d1	476	reftime += rndDelay(secSpan);
mluis	0:62d1edcc13d1	477	if( LMIC.globalDutyRate == 0 \|\| (reftime - LMIC.globalDutyAvail) > 0 ) {
mluis	1:d3b7bde3995c	478	LMIC.globalDutyAvail = reftime;
mluis	1:d3b7bde3995c	479	LMIC.opmode \|= OP_RNDTX;
mluis	0:62d1edcc13d1	480	}
mluis	0:62d1edcc13d1	481	}
mluis	0:62d1edcc13d1	482
mluis	0:62d1edcc13d1	483
mluis	0:62d1edcc13d1	484	static void setDrJoin (u1_t reason, u1_t dr) {
mluis	0:62d1edcc13d1	485	EV(drChange, INFO, (e_.reason = reason,
mluis	1:d3b7bde3995c	486	e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	487	e_.dr = dr\|DR_PAGE,
mluis	1:d3b7bde3995c	488	e_.txpow = LMIC.adrTxPow,
mluis	1:d3b7bde3995c	489	e_.prevdr = LMIC.datarate\|DR_PAGE,
mluis	1:d3b7bde3995c	490	e_.prevtxpow = LMIC.adrTxPow));
mluis	0:62d1edcc13d1	491	LMIC.datarate = dr;
mluis	1:d3b7bde3995c	492	DO_DEVDB(LMIC.datarate,datarate);
mluis	0:62d1edcc13d1	493	}
mluis	0:62d1edcc13d1	494
mluis	0:62d1edcc13d1	495
mluis	0:62d1edcc13d1	496	static void setDrTxpow (u1_t reason, u1_t dr, s1_t pow) {
mluis	0:62d1edcc13d1	497	EV(drChange, INFO, (e_.reason = reason,
mluis	1:d3b7bde3995c	498	e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	499	e_.dr = dr\|DR_PAGE,
mluis	1:d3b7bde3995c	500	e_.txpow = pow,
mluis	1:d3b7bde3995c	501	e_.prevdr = LMIC.datarate\|DR_PAGE,
mluis	1:d3b7bde3995c	502	e_.prevtxpow = LMIC.adrTxPow));
mluis	1:d3b7bde3995c	503
mluis	0:62d1edcc13d1	504	if( pow != KEEP_TXPOW )
mluis	1:d3b7bde3995c	505	LMIC.adrTxPow = pow;
mluis	1:d3b7bde3995c	506	if( LMIC.datarate != dr ) {
mluis	1:d3b7bde3995c	507	LMIC.datarate = dr;
mluis	1:d3b7bde3995c	508	DO_DEVDB(LMIC.datarate,datarate);
mluis	1:d3b7bde3995c	509	LMIC.opmode \|= OP_NEXTCHNL;
mluis	1:d3b7bde3995c	510	}
mluis	0:62d1edcc13d1	511	}
mluis	0:62d1edcc13d1	512
mluis	0:62d1edcc13d1	513
mluis	0:62d1edcc13d1	514	void LMIC_stopPingable (void) {
mluis	0:62d1edcc13d1	515	LMIC.opmode &= ~(OP_PINGABLE\|OP_PINGINI);
mluis	0:62d1edcc13d1	516	}
mluis	0:62d1edcc13d1	517
mluis	0:62d1edcc13d1	518
mluis	0:62d1edcc13d1	519	void LMIC_setPingable (u1_t intvExp) {
mluis	0:62d1edcc13d1	520	// Change setting
mluis	0:62d1edcc13d1	521	LMIC.ping.intvExp = (intvExp & 0x7);
mluis	0:62d1edcc13d1	522	LMIC.opmode \|= OP_PINGABLE;
mluis	0:62d1edcc13d1	523	// App may call LMIC_enableTracking() explicitely before
mluis	0:62d1edcc13d1	524	// Otherwise tracking is implicitly enabled here
mluis	0:62d1edcc13d1	525	if( (LMIC.opmode & (OP_TRACK\|OP_SCAN)) == 0 && LMIC.bcninfoTries == 0 )
mluis	1:d3b7bde3995c	526	LMIC_enableTracking(0);
mluis	0:62d1edcc13d1	527	}
mluis	0:62d1edcc13d1	528
mluis	0:62d1edcc13d1	529
mluis	1:d3b7bde3995c	530	#if defined(CFG_eu868)
mluis	0:62d1edcc13d1	531	// ================================================================================
mluis	0:62d1edcc13d1	532	//
mluis	0:62d1edcc13d1	533	// BEG: EU868 related stuff
mluis	0:62d1edcc13d1	534	//
mluis	1:d3b7bde3995c	535	enum { NUM_DEFAULT_CHANNELS=6 };
mluis	0:62d1edcc13d1	536	static const u4_t iniChannelFreq[12] = {
mluis	0:62d1edcc13d1	537	// Join frequencies and duty cycle limit (0.1%)
mluis	1:d3b7bde3995c	538	EU868_F1\|BAND_MILLI, EU868_J4\|BAND_MILLI,
mluis	1:d3b7bde3995c	539	EU868_F2\|BAND_MILLI, EU868_J5\|BAND_MILLI,
mluis	1:d3b7bde3995c	540	EU868_F3\|BAND_MILLI, EU868_J6\|BAND_MILLI,
mluis	0:62d1edcc13d1	541	// Default operational frequencies
mluis	0:62d1edcc13d1	542	EU868_F1\|BAND_CENTI, EU868_F2\|BAND_CENTI, EU868_F3\|BAND_CENTI,
mluis	0:62d1edcc13d1	543	EU868_F4\|BAND_MILLI, EU868_F5\|BAND_MILLI, EU868_F6\|BAND_DECI
mluis	0:62d1edcc13d1	544	};
mluis	0:62d1edcc13d1	545
mluis	0:62d1edcc13d1	546	static void initDefaultChannels (bit_t join) {
mluis	1:d3b7bde3995c	547	os_clearMem(&LMIC.channelFreq, sizeof(LMIC.channelFreq));
mluis	1:d3b7bde3995c	548	os_clearMem(&LMIC.channelDrMap, sizeof(LMIC.channelDrMap));
mluis	1:d3b7bde3995c	549	os_clearMem(&LMIC.bands, sizeof(LMIC.bands));
mluis	1:d3b7bde3995c	550
mluis	1:d3b7bde3995c	551	LMIC.channelMap = 0x1F;
mluis	0:62d1edcc13d1	552	u1_t su = join ? 0 : 6;
mluis	0:62d1edcc13d1	553	for( u1_t fu=0; fu<6; fu++,su++ ) {
mluis	1:d3b7bde3995c	554	LMIC.channelFreq[fu] = iniChannelFreq[su];
mluis	1:d3b7bde3995c	555	LMIC.channelDrMap[fu] = DR_RANGE_MAP(DR_SF12,DR_SF7);
mluis	0:62d1edcc13d1	556	}
mluis	1:d3b7bde3995c	557	if( !join ) {
mluis	1:d3b7bde3995c	558	LMIC.channelDrMap[5] = DR_RANGE_MAP(DR_SF12,DR_SF7);
mluis	1:d3b7bde3995c	559	LMIC.channelDrMap[1] = DR_RANGE_MAP(DR_SF12,DR_FSK);
mluis	1:d3b7bde3995c	560	}
mluis	0:62d1edcc13d1	561
mluis	1:d3b7bde3995c	562	LMIC.bands[BAND_MILLI].txcap = 1000; // 0.1%
mluis	1:d3b7bde3995c	563	LMIC.bands[BAND_MILLI].txpow = 14;
mluis	1:d3b7bde3995c	564	LMIC.bands[BAND_MILLI].lastchnl = os_getRndU1() % MAX_CHANNELS;
mluis	1:d3b7bde3995c	565	LMIC.bands[BAND_CENTI].txcap = 100; // 1%
mluis	1:d3b7bde3995c	566	LMIC.bands[BAND_CENTI].txpow = 14;
mluis	1:d3b7bde3995c	567	LMIC.bands[BAND_CENTI].lastchnl = os_getRndU1() % MAX_CHANNELS;
mluis	1:d3b7bde3995c	568	LMIC.bands[BAND_DECI ].txcap = 10; // 10%
mluis	1:d3b7bde3995c	569	LMIC.bands[BAND_DECI ].txpow = 27;
mluis	1:d3b7bde3995c	570	LMIC.bands[BAND_CENTI].lastchnl = os_getRndU1() % MAX_CHANNELS;
mluis	0:62d1edcc13d1	571	LMIC.bands[BAND_MILLI].avail =
mluis	0:62d1edcc13d1	572	LMIC.bands[BAND_CENTI].avail =
mluis	0:62d1edcc13d1	573	LMIC.bands[BAND_DECI ].avail = os_getTime();
mluis	0:62d1edcc13d1	574	}
mluis	0:62d1edcc13d1	575
mluis	1:d3b7bde3995c	576	bit_t LMIC_setupBand (u1_t bandidx, s1_t txpow, u2_t txcap) {
mluis	1:d3b7bde3995c	577	if( bandidx > BAND_AUX ) return 0;
mluis	1:d3b7bde3995c	578	band_t* b = &LMIC.bands[bandidx];
mluis	1:d3b7bde3995c	579	b->txpow = txpow;
mluis	1:d3b7bde3995c	580	b->txcap = txcap;
mluis	1:d3b7bde3995c	581	b->avail = os_getTime();
mluis	1:d3b7bde3995c	582	b->lastchnl = os_getRndU1() % MAX_CHANNELS;
mluis	1:d3b7bde3995c	583	return 1;
mluis	1:d3b7bde3995c	584	}
mluis	1:d3b7bde3995c	585
mluis	1:d3b7bde3995c	586	bit_t LMIC_setupChannel (u1_t chidx, u4_t freq, u2_t drmap, s1_t band) {
mluis	1:d3b7bde3995c	587	if( chidx >= MAX_CHANNELS )
mluis	1:d3b7bde3995c	588	return 0;
mluis	1:d3b7bde3995c	589	if( band == -1 ) {
mluis	1:d3b7bde3995c	590	if( freq >= 869400000 && freq <= 869650000 )
mluis	1:d3b7bde3995c	591	freq \|= BAND_DECI; // 10% 27dBm
mluis	1:d3b7bde3995c	592	else if( (freq >= 868000000 && freq <= 868600000) \|\|
mluis	1:d3b7bde3995c	593	(freq >= 869700000 && freq <= 870000000) )
mluis	1:d3b7bde3995c	594	freq \|= BAND_CENTI; // 1% 14dBm
mluis	1:d3b7bde3995c	595	else
mluis	1:d3b7bde3995c	596	freq \|= BAND_MILLI; // 0.1% 14dBm
mluis	1:d3b7bde3995c	597	} else {
mluis	1:d3b7bde3995c	598	if( band > BAND_AUX ) return 0;
mluis	1:d3b7bde3995c	599	freq = (freq&~3) \| band;
mluis	1:d3b7bde3995c	600	}
mluis	1:d3b7bde3995c	601	LMIC.channelFreq [chidx] = freq;
mluis	1:d3b7bde3995c	602	LMIC.channelDrMap[chidx] = drmap==0 ? DR_RANGE_MAP(DR_SF12,DR_SF7) : drmap;
mluis	1:d3b7bde3995c	603	LMIC.channelMap \|= 1<<chidx; // enabled right away
mluis	1:d3b7bde3995c	604	return 1;
mluis	1:d3b7bde3995c	605	}
mluis	1:d3b7bde3995c	606
mluis	1:d3b7bde3995c	607	void LMIC_disableChannel (u1_t channel) {
mluis	1:d3b7bde3995c	608	LMIC.channelFreq[channel] = 0;
mluis	1:d3b7bde3995c	609	LMIC.channelDrMap[channel] = 0;
mluis	1:d3b7bde3995c	610	LMIC.channelMap &= ~(1<<channel);
mluis	1:d3b7bde3995c	611	}
mluis	1:d3b7bde3995c	612
mluis	0:62d1edcc13d1	613	static u4_t convFreq (xref2u1_t ptr) {
mluis	0:62d1edcc13d1	614	u4_t freq = (os_rlsbf4(ptr-1) >> 8) * 100;
mluis	1:d3b7bde3995c	615	if( freq < EU868_FREQ_MIN \|\| freq > EU868_FREQ_MAX )
mluis	1:d3b7bde3995c	616	freq = 0;
mluis	0:62d1edcc13d1	617	return freq;
mluis	0:62d1edcc13d1	618	}
mluis	0:62d1edcc13d1	619
mluis	0:62d1edcc13d1	620	static u1_t mapChannels (u1_t chpage, u2_t chmap) {
mluis	1:d3b7bde3995c	621	// Bad page, disable all channel, enable non-existent
mluis	1:d3b7bde3995c	622	if( chpage != 0 \|\| chmap==0 \|\| (chmap & ~LMIC.channelMap) != 0 )
mluis	1:d3b7bde3995c	623	return 0; // illegal input
mluis	0:62d1edcc13d1	624	for( u1_t chnl=0; chnl<MAX_CHANNELS; chnl++ ) {
mluis	1:d3b7bde3995c	625	if( (chmap & (1<<chnl)) != 0 && LMIC.channelFreq[chnl] == 0 )
mluis	1:d3b7bde3995c	626	chmap &= ~(1<<chnl); // ignore - channel is not defined
mluis	0:62d1edcc13d1	627	}
mluis	0:62d1edcc13d1	628	LMIC.channelMap = chmap;
mluis	0:62d1edcc13d1	629	return 1;
mluis	0:62d1edcc13d1	630	}
mluis	0:62d1edcc13d1	631
mluis	0:62d1edcc13d1	632
mluis	0:62d1edcc13d1	633	static void updateTx (ostime_t txbeg) {
mluis	0:62d1edcc13d1	634	u4_t freq = LMIC.channelFreq[LMIC.txChnl];
mluis	0:62d1edcc13d1	635	// Update global/band specific duty cycle stats
mluis	0:62d1edcc13d1	636	ostime_t airtime = calcAirTime(LMIC.rps, LMIC.dataLen);
mluis	0:62d1edcc13d1	637	// Update channel/global duty cycle stats
mluis	0:62d1edcc13d1	638	xref2band_t band = &LMIC.bands[freq & 0x3];
mluis	0:62d1edcc13d1	639	LMIC.freq = freq & ~(u4_t)3;
mluis	0:62d1edcc13d1	640	LMIC.txpow = band->txpow;
mluis	0:62d1edcc13d1	641	band->avail = txbeg + airtime * band->txcap;
mluis	0:62d1edcc13d1	642	if( LMIC.globalDutyRate != 0 )
mluis	1:d3b7bde3995c	643	LMIC.globalDutyAvail = txbeg + (airtime<<LMIC.globalDutyRate);
mluis	0:62d1edcc13d1	644	}
mluis	0:62d1edcc13d1	645
mluis	0:62d1edcc13d1	646	static ostime_t nextTx (ostime_t now) {
mluis	1:d3b7bde3995c	647	u1_t bmap=0xF;
mluis	1:d3b7bde3995c	648	do {
mluis	1:d3b7bde3995c	649	ostime_t mintime = now + /10h/36000*OSTICKS_PER_SEC;
mluis	1:d3b7bde3995c	650	u1_t band=0;
mluis	1:d3b7bde3995c	651	for( u1_t bi=0; bi<4; bi++ ) {
mluis	1:d3b7bde3995c	652	if( (bmap & (1<<bi)) && mintime - LMIC.bands[bi].avail > 0 )
mluis	1:d3b7bde3995c	653	mintime = LMIC.bands[band = bi].avail;
mluis	0:62d1edcc13d1	654	}
mluis	1:d3b7bde3995c	655	// Find next channel in given band
mluis	1:d3b7bde3995c	656	u1_t chnl = LMIC.bands[band].lastchnl;
mluis	1:d3b7bde3995c	657	for( u1_t ci=0; ci<MAX_CHANNELS; ci++ ) {
mluis	1:d3b7bde3995c	658	if( (chnl = (chnl+1)) >= MAX_CHANNELS )
mluis	1:d3b7bde3995c	659	chnl -= MAX_CHANNELS;
mluis	1:d3b7bde3995c	660	if( (LMIC.channelMap & (1<<chnl)) != 0 && // channel enabled
mluis	1:d3b7bde3995c	661	(LMIC.channelDrMap[chnl] & (1<<(LMIC.datarate&0xF))) != 0 &&
mluis	1:d3b7bde3995c	662	band == (LMIC.channelFreq[chnl] & 0x3) ) { // in selected band
mluis	1:d3b7bde3995c	663	LMIC.txChnl = LMIC.bands[band].lastchnl = chnl;
mluis	1:d3b7bde3995c	664	return mintime;
mluis	1:d3b7bde3995c	665	}
mluis	0:62d1edcc13d1	666	}
mluis	1:d3b7bde3995c	667	if( (bmap &= ~(1<<band)) == 0 ) {
mluis	1:d3b7bde3995c	668	// No feasible channel found!
mluis	1:d3b7bde3995c	669	return mintime;
mluis	1:d3b7bde3995c	670	}
mluis	0:62d1edcc13d1	671	} while(1);
mluis	0:62d1edcc13d1	672	}
mluis	0:62d1edcc13d1	673
mluis	1:d3b7bde3995c	674
mluis	0:62d1edcc13d1	675	static void setBcnRxParams (void) {
mluis	0:62d1edcc13d1	676	LMIC.dataLen = 0;
mluis	0:62d1edcc13d1	677	LMIC.freq = LMIC.channelFreq[LMIC.bcnChnl] & ~(u4_t)3;
mluis	0:62d1edcc13d1	678	LMIC.rps = setIh(setNocrc(dndr2rps((dr_t)DR_BCN),1),LEN_BCN);
mluis	0:62d1edcc13d1	679	}
mluis	0:62d1edcc13d1	680
mluis	0:62d1edcc13d1	681	#define setRx1Params() /LMIC.freq/rps remain unchanged/
mluis	0:62d1edcc13d1	682
mluis	0:62d1edcc13d1	683	static void initJoinLoop (void) {
mluis	1:d3b7bde3995c	684	LMIC.txChnl = os_getRndU1() % 6;
mluis	0:62d1edcc13d1	685	LMIC.adrTxPow = 14;
mluis	0:62d1edcc13d1	686	setDrJoin(DRCHG_SET, DR_SF7);
mluis	0:62d1edcc13d1	687	initDefaultChannels(1);
mluis	0:62d1edcc13d1	688	ASSERT((LMIC.opmode & OP_NEXTCHNL)==0);
mluis	1:d3b7bde3995c	689	LMIC.txend = LMIC.bands[BAND_MILLI].avail + rndDelay(8);
mluis	0:62d1edcc13d1	690	}
mluis	0:62d1edcc13d1	691
mluis	0:62d1edcc13d1	692
mluis	0:62d1edcc13d1	693	static ostime_t nextJoinState (void) {
mluis	1:d3b7bde3995c	694	u1_t failed = 0;
mluis	1:d3b7bde3995c	695
mluis	0:62d1edcc13d1	696	// Try 869.x and then 864.x with same DR
mluis	0:62d1edcc13d1	697	// If both fail try next lower datarate
mluis	1:d3b7bde3995c	698	if( ++LMIC.txChnl == 6 )
mluis	1:d3b7bde3995c	699	LMIC.txChnl = 0;
mluis	1:d3b7bde3995c	700	if( (++LMIC.txCnt & 1) == 0 ) {
mluis	1:d3b7bde3995c	701	// Lower DR every 2nd try (having tried 868.x and 864.x with the same DR)
mluis	1:d3b7bde3995c	702	if( LMIC.datarate == DR_SF12 )
mluis	1:d3b7bde3995c	703	failed = 1; // we have tried all DR - signal EV_JOIN_FAILED
mluis	1:d3b7bde3995c	704	else
mluis	1:d3b7bde3995c	705	setDrJoin(DRCHG_NOJACC, decDR((dr_t)LMIC.datarate));
mluis	1:d3b7bde3995c	706	}
mluis	1:d3b7bde3995c	707	// Clear NEXTCHNL because join state engine controls channel hopping
mluis	0:62d1edcc13d1	708	LMIC.opmode &= ~OP_NEXTCHNL;
mluis	1:d3b7bde3995c	709	// Move txend to randomize synchronized concurrent joins.
mluis	1:d3b7bde3995c	710	// Duty cycle is based on txend.
mluis	1:d3b7bde3995c	711	ostime_t time = os_getTime();
mluis	1:d3b7bde3995c	712	if( time - LMIC.bands[BAND_MILLI].avail < 0 )
mluis	1:d3b7bde3995c	713	time = LMIC.bands[BAND_MILLI].avail;
mluis	1:d3b7bde3995c	714	LMIC.txend = time +
mluis	1:d3b7bde3995c	715	(isTESTMODE()
mluis	1:d3b7bde3995c	716	// Avoid collision with JOIN ACCEPT @ SF12 being sent by GW (but we missed it)
mluis	1:d3b7bde3995c	717	? DNW2_SAFETY_ZONE
mluis	1:d3b7bde3995c	718	// Otherwise: randomize join (street lamp case):
mluis	1:d3b7bde3995c	719	// SF12:255, SF11:127, .., SF7:8secs
mluis	1:d3b7bde3995c	720	: DNW2_SAFETY_ZONE+rndDelay(255>>LMIC.datarate));
mluis	1:d3b7bde3995c	721	// 1 - triggers EV_JOIN_FAILED event
mluis	1:d3b7bde3995c	722	return failed;
mluis	0:62d1edcc13d1	723	}
mluis	0:62d1edcc13d1	724
mluis	0:62d1edcc13d1	725	//
mluis	0:62d1edcc13d1	726	// END: EU868 related stuff
mluis	0:62d1edcc13d1	727	//
mluis	0:62d1edcc13d1	728	// ================================================================================
mluis	1:d3b7bde3995c	729	#elif defined(CFG_us915)
mluis	0:62d1edcc13d1	730	// ================================================================================
mluis	0:62d1edcc13d1	731	//
mluis	0:62d1edcc13d1	732	// BEG: US915 related stuff
mluis	0:62d1edcc13d1	733	//
mluis	0:62d1edcc13d1	734
mluis	1:d3b7bde3995c	735
mluis	0:62d1edcc13d1	736	static void initDefaultChannels (void) {
mluis	0:62d1edcc13d1	737	for( u1_t i=0; i<4; i++ )
mluis	1:d3b7bde3995c	738	LMIC.channelMap[i] = 0xFFFF;
mluis	0:62d1edcc13d1	739	LMIC.channelMap[4] = 0x00FF;
mluis	0:62d1edcc13d1	740	}
mluis	0:62d1edcc13d1	741
mluis	0:62d1edcc13d1	742	static u4_t convFreq (xref2u1_t ptr) {
mluis	0:62d1edcc13d1	743	u4_t freq = (os_rlsbf4(ptr-1) >> 8) * 100;
mluis	0:62d1edcc13d1	744	if( freq >= US915_FREQ_MIN && freq <= US915_FREQ_MAX )
mluis	1:d3b7bde3995c	745	freq = 0;
mluis	0:62d1edcc13d1	746	return freq;
mluis	0:62d1edcc13d1	747	}
mluis	0:62d1edcc13d1	748
mluis	1:d3b7bde3995c	749	bit_t LMIC_setupChannel (u1_t chidx, u4_t freq, u2_t drmap, s1_t band) {
mluis	0:62d1edcc13d1	750	if( chidx < 72 \|\| chidx >= 72+MAX_XCHANNELS )
mluis	1:d3b7bde3995c	751	return 0; // channels 0..71 are hardwired
mluis	0:62d1edcc13d1	752	chidx -= 72;
mluis	0:62d1edcc13d1	753	LMIC.xchFreq[chidx] = freq;
mluis	1:d3b7bde3995c	754	LMIC.xchDrMap[chidx] = drmap==0 ? DR_RANGE_MAP(DR_SF10,DR_SF8C) : drmap;
mluis	0:62d1edcc13d1	755	LMIC.channelMap[chidx>>4] \|= (1<<(chidx&0xF));
mluis	0:62d1edcc13d1	756	return 1;
mluis	0:62d1edcc13d1	757	}
mluis	0:62d1edcc13d1	758
mluis	1:d3b7bde3995c	759	void LMIC_disableChannel (u1_t channel) {
mluis	1:d3b7bde3995c	760	if( channel < 72+MAX_XCHANNELS )
mluis	1:d3b7bde3995c	761	LMIC.channelMap[channel/4] &= ~(1<<(channel&0xF));
mluis	1:d3b7bde3995c	762	}
mluis	0:62d1edcc13d1	763
mluis	0:62d1edcc13d1	764	static u1_t mapChannels (u1_t chpage, u2_t chmap) {
mluis	0:62d1edcc13d1	765	if( chpage == MCMD_LADR_CHP_125ON \|\| chpage == MCMD_LADR_CHP_125OFF ) {
mluis	1:d3b7bde3995c	766	u2_t en125 = chpage == MCMD_LADR_CHP_125ON ? 0xFFFF : 0x0000;
mluis	1:d3b7bde3995c	767	for( u1_t u=0; u<4; u++ )
mluis	1:d3b7bde3995c	768	LMIC.channelMap[u] = en125;
mluis	1:d3b7bde3995c	769	LMIC.channelMap[64/16] = chmap;
mluis	0:62d1edcc13d1	770	} else {
mluis	1:d3b7bde3995c	771	if( chpage >= (72+MAX_XCHANNELS+15)/16 )
mluis	1:d3b7bde3995c	772	return 0;
mluis	1:d3b7bde3995c	773	LMIC.channelMap[chpage] = chmap;
mluis	0:62d1edcc13d1	774	}
mluis	0:62d1edcc13d1	775	return 1;
mluis	0:62d1edcc13d1	776	}
mluis	0:62d1edcc13d1	777
mluis	0:62d1edcc13d1	778	static void updateTx (ostime_t txbeg) {
mluis	0:62d1edcc13d1	779	u1_t chnl = LMIC.txChnl;
mluis	0:62d1edcc13d1	780	if( chnl < 64 ) {
mluis	1:d3b7bde3995c	781	LMIC.freq = US915_125kHz_UPFBASE + chnl*US915_125kHz_UPFSTEP;
mluis	1:d3b7bde3995c	782	LMIC.txpow = 30;
mluis	1:d3b7bde3995c	783	return;
mluis	0:62d1edcc13d1	784	}
mluis	0:62d1edcc13d1	785	LMIC.txpow = 26;
mluis	0:62d1edcc13d1	786	if( chnl < 64+8 ) {
mluis	1:d3b7bde3995c	787	LMIC.freq = US915_500kHz_UPFBASE + (chnl-64)*US915_500kHz_UPFSTEP;
mluis	0:62d1edcc13d1	788	} else {
mluis	1:d3b7bde3995c	789	ASSERT(chnl < 64+8+MAX_XCHANNELS);
mluis	1:d3b7bde3995c	790	LMIC.freq = LMIC.xchFreq[chnl-72];
mluis	0:62d1edcc13d1	791	}
mluis	0:62d1edcc13d1	792
mluis	0:62d1edcc13d1	793	// Update global duty cycle stats
mluis	0:62d1edcc13d1	794	if( LMIC.globalDutyRate != 0 ) {
mluis	1:d3b7bde3995c	795	ostime_t airtime = calcAirTime(LMIC.rps, LMIC.dataLen);
mluis	1:d3b7bde3995c	796	LMIC.globalDutyAvail = txbeg + (airtime<<LMIC.globalDutyRate);
mluis	0:62d1edcc13d1	797	}
mluis	0:62d1edcc13d1	798	}
mluis	0:62d1edcc13d1	799
mluis	0:62d1edcc13d1	800	// US does not have duty cycling - return now as earliest TX time
mluis	0:62d1edcc13d1	801	#define nextTx(now) (_nextTx(),(now))
mluis	0:62d1edcc13d1	802	static void _nextTx (void) {
mluis	1:d3b7bde3995c	803	if( LMIC.chRnd==0 )
mluis	1:d3b7bde3995c	804	LMIC.chRnd = os_getRndU1() & 0x3F;
mluis	1:d3b7bde3995c	805	if( LMIC.datarate >= DR_SF8C ) { // 500kHz
mluis	1:d3b7bde3995c	806	u1_t map = LMIC.channelMap[64/16]&0xFF;
mluis	1:d3b7bde3995c	807	for( u1_t i=0; i<8; i++ ) {
mluis	1:d3b7bde3995c	808	if( (map & (1<<(++LMIC.chRnd & 7))) != 0 ) {
mluis	1:d3b7bde3995c	809	LMIC.txChnl = 64 + (LMIC.chRnd & 7);
mluis	1:d3b7bde3995c	810	return;
mluis	1:d3b7bde3995c	811	}
mluis	1:d3b7bde3995c	812	}
mluis	1:d3b7bde3995c	813	} else { // 125kHz
mluis	1:d3b7bde3995c	814	for( u1_t i=0; i<64; i++ ) {
mluis	1:d3b7bde3995c	815	u1_t chnl = ++LMIC.chRnd & 0x3F;
mluis	1:d3b7bde3995c	816	if( (LMIC.channelMap[(chnl >> 4)] & (1<<(chnl & 0xF))) != 0 ) {
mluis	1:d3b7bde3995c	817	LMIC.txChnl = chnl;
mluis	1:d3b7bde3995c	818	return;
mluis	1:d3b7bde3995c	819	}
mluis	1:d3b7bde3995c	820	}
mluis	0:62d1edcc13d1	821	}
mluis	1:d3b7bde3995c	822	// No feasible channel found! Keep old one.
mluis	0:62d1edcc13d1	823	}
mluis	0:62d1edcc13d1	824
mluis	0:62d1edcc13d1	825	static void setBcnRxParams (void) {
mluis	0:62d1edcc13d1	826	LMIC.dataLen = 0;
mluis	1:d3b7bde3995c	827	LMIC.freq = US915_500kHz_DNFBASE + LMIC.bcnChnl * US915_500kHz_DNFSTEP;
mluis	0:62d1edcc13d1	828	LMIC.rps = setIh(setNocrc(dndr2rps((dr_t)DR_BCN),1),LEN_BCN);
mluis	0:62d1edcc13d1	829	}
mluis	0:62d1edcc13d1	830
mluis	1:d3b7bde3995c	831	#define setRx1Params() { \
mluis	0:62d1edcc13d1	832	LMIC.freq = US915_500kHz_DNFBASE + (LMIC.txChnl & 0x7) * US915_500kHz_DNFSTEP; \
mluis	1:d3b7bde3995c	833	if( /* TX datarate */LMIC.dndr < DR_SF8C ) \
mluis	1:d3b7bde3995c	834	LMIC.dndr += DR_SF10CR - DR_SF10; \
mluis	1:d3b7bde3995c	835	else if( LMIC.dndr == DR_SF8C ) \
mluis	1:d3b7bde3995c	836	LMIC.dndr = DR_SF7CR; \
mluis	1:d3b7bde3995c	837	LMIC.rps = dndr2rps(LMIC.dndr); \
mluis	0:62d1edcc13d1	838	}
mluis	0:62d1edcc13d1	839
mluis	0:62d1edcc13d1	840	static void initJoinLoop (void) {
mluis	1:d3b7bde3995c	841	LMIC.chRnd = 0;
mluis	1:d3b7bde3995c	842	LMIC.txChnl = 0;
mluis	0:62d1edcc13d1	843	LMIC.adrTxPow = 20;
mluis	0:62d1edcc13d1	844	ASSERT((LMIC.opmode & OP_NEXTCHNL)==0);
mluis	0:62d1edcc13d1	845	LMIC.txend = os_getTime();
mluis	0:62d1edcc13d1	846	setDrJoin(DRCHG_SET, DR_SF7);
mluis	0:62d1edcc13d1	847	}
mluis	0:62d1edcc13d1	848
mluis	0:62d1edcc13d1	849	static ostime_t nextJoinState (void) {
mluis	0:62d1edcc13d1	850	// Try the following:
mluis	0:62d1edcc13d1	851	// SF7/8/9/10 on a random channel 0..63
mluis	0:62d1edcc13d1	852	// SF8C on a random channel 64..71
mluis	0:62d1edcc13d1	853	//
mluis	1:d3b7bde3995c	854	u1_t failed = 0;
mluis	0:62d1edcc13d1	855	if( LMIC.datarate != DR_SF8C ) {
mluis	1:d3b7bde3995c	856	LMIC.txChnl = 64+(LMIC.txChnl&7);
mluis	1:d3b7bde3995c	857	setDrJoin(DRCHG_SET, DR_SF8C);
mluis	0:62d1edcc13d1	858	} else {
mluis	1:d3b7bde3995c	859	LMIC.txChnl = os_getRndU1() & 0x3F;
mluis	1:d3b7bde3995c	860	s1_t dr = DR_SF7 - ++LMIC.txCnt;
mluis	1:d3b7bde3995c	861	if( dr < DR_SF10 ) {
mluis	1:d3b7bde3995c	862	dr = DR_SF10;
mluis	1:d3b7bde3995c	863	failed = 1; // All DR exhausted - signal failed
mluis	1:d3b7bde3995c	864	}
mluis	1:d3b7bde3995c	865	setDrJoin(DRCHG_SET, dr);
mluis	0:62d1edcc13d1	866	}
mluis	1:d3b7bde3995c	867	LMIC.opmode &= ~OP_NEXTCHNL;
mluis	1:d3b7bde3995c	868	LMIC.txend = os_getTime() +
mluis	1:d3b7bde3995c	869	(isTESTMODE()
mluis	1:d3b7bde3995c	870	// Avoid collision with JOIN ACCEPT being sent by GW (but we missed it - GW is still busy)
mluis	1:d3b7bde3995c	871	? DNW2_SAFETY_ZONE
mluis	1:d3b7bde3995c	872	// Otherwise: randomize join (street lamp case):
mluis	1:d3b7bde3995c	873	// SF10:16, SF9=8,..SF8C:1secs
mluis	1:d3b7bde3995c	874	: rndDelay(16>>LMIC.datarate));
mluis	1:d3b7bde3995c	875	// 1 - triggers EV_JOIN_FAILED event
mluis	1:d3b7bde3995c	876	return failed;
mluis	0:62d1edcc13d1	877	}
mluis	0:62d1edcc13d1	878
mluis	0:62d1edcc13d1	879	//
mluis	0:62d1edcc13d1	880	// END: US915 related stuff
mluis	0:62d1edcc13d1	881	//
mluis	0:62d1edcc13d1	882	// ================================================================================
mluis	0:62d1edcc13d1	883	#else
mluis	0:62d1edcc13d1	884	#error Unsupported frequency band!
mluis	0:62d1edcc13d1	885	#endif
mluis	0:62d1edcc13d1	886
mluis	0:62d1edcc13d1	887
mluis	0:62d1edcc13d1	888	static void runEngineUpdate (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	889	engineUpdate();
mluis	0:62d1edcc13d1	890	}
mluis	0:62d1edcc13d1	891
mluis	0:62d1edcc13d1	892
mluis	0:62d1edcc13d1	893	static void reportEvent (ev_t ev) {
mluis	0:62d1edcc13d1	894	EV(devCond, INFO, (e_.reason = EV::devCond_t::LMIC_EV,
mluis	1:d3b7bde3995c	895	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	896	e_.info = ev));
mluis	0:62d1edcc13d1	897	ON_LMIC_EVENT(ev);
mluis	0:62d1edcc13d1	898	engineUpdate();
mluis	0:62d1edcc13d1	899	}
mluis	0:62d1edcc13d1	900
mluis	0:62d1edcc13d1	901
mluis	1:d3b7bde3995c	902	static void runReset (xref2osjob_t osjob) {
mluis	1:d3b7bde3995c	903	// Disable session
mluis	1:d3b7bde3995c	904	LMIC_reset();
mluis	1:d3b7bde3995c	905	LMIC_startJoining();
mluis	1:d3b7bde3995c	906	reportEvent(EV_RESET);
mluis	1:d3b7bde3995c	907	}
mluis	1:d3b7bde3995c	908
mluis	0:62d1edcc13d1	909	static void stateJustJoined (void) {
mluis	0:62d1edcc13d1	910	LMIC.seqnoDn = LMIC.seqnoUp = 0;
mluis	0:62d1edcc13d1	911	LMIC.rejoinCnt = 0;
mluis	0:62d1edcc13d1	912	LMIC.dnConf = LMIC.adrChanged = LMIC.ladrAns = LMIC.devsAns = 0;
mluis	0:62d1edcc13d1	913	LMIC.moreData = LMIC.dn2Ans = LMIC.snchAns = LMIC.dutyCapAns = 0;
mluis	0:62d1edcc13d1	914	LMIC.pingSetAns = 0;
mluis	0:62d1edcc13d1	915	LMIC.upRepeat = 0;
mluis	0:62d1edcc13d1	916	LMIC.adrAckReq = LINK_CHECK_INIT;
mluis	0:62d1edcc13d1	917	LMIC.dn2Dr = DR_DNW2;
mluis	0:62d1edcc13d1	918	LMIC.dn2Freq = FREQ_DNW2;
mluis	0:62d1edcc13d1	919	LMIC.bcnChnl = CHNL_BCN;
mluis	0:62d1edcc13d1	920	LMIC.ping.freq = FREQ_PING;
mluis	0:62d1edcc13d1	921	LMIC.ping.dr = DR_PING;
mluis	0:62d1edcc13d1	922	}
mluis	0:62d1edcc13d1	923
mluis	0:62d1edcc13d1	924
mluis	0:62d1edcc13d1	925	// ================================================================================
mluis	0:62d1edcc13d1	926	// Decoding frames
mluis	0:62d1edcc13d1	927
mluis	0:62d1edcc13d1	928
mluis	0:62d1edcc13d1	929	// Decode beacon - do not overwrite bcninfo unless we have a match!
mluis	0:62d1edcc13d1	930	static int decodeBeacon (void) {
mluis	0:62d1edcc13d1	931	ASSERT(LMIC.dataLen == LEN_BCN); // implicit header RX guarantees this
mluis	0:62d1edcc13d1	932	xref2u1_t d = LMIC.frame;
mluis	1:d3b7bde3995c	933	if(
mluis	1:d3b7bde3995c	934	#if CFG_eu868
mluis	1:d3b7bde3995c	935	d[OFF_BCN_CRC1] != (u1_t)os_crc16(d,OFF_BCN_CRC1)
mluis	1:d3b7bde3995c	936	#elif CFG_us915
mluis	1:d3b7bde3995c	937	os_rlsbf2(&d[OFF_BCN_CRC1]) != os_crc16(d,OFF_BCN_CRC1)
mluis	1:d3b7bde3995c	938	#endif
mluis	1:d3b7bde3995c	939	)
mluis	1:d3b7bde3995c	940	return 0; // first (common) part fails CRC check
mluis	0:62d1edcc13d1	941	// First set of fields is ok
mluis	0:62d1edcc13d1	942	u4_t bcnnetid = os_rlsbf4(&d[OFF_BCN_NETID]) & 0xFFFFFF;
mluis	0:62d1edcc13d1	943	if( bcnnetid != LMIC.netid )
mluis	1:d3b7bde3995c	944	return -1; // not the beacon we're looking for
mluis	0:62d1edcc13d1	945
mluis	0:62d1edcc13d1	946	LMIC.bcninfo.flags &= ~(BCN_PARTIAL\|BCN_FULL);
mluis	0:62d1edcc13d1	947	// Match - update bcninfo structure
mluis	1:d3b7bde3995c	948	LMIC.bcninfo.snr = LMIC.snr;
mluis	1:d3b7bde3995c	949	LMIC.bcninfo.rssi = LMIC.rssi;
mluis	0:62d1edcc13d1	950	LMIC.bcninfo.txtime = LMIC.rxtime - AIRTIME_BCN_osticks;
mluis	0:62d1edcc13d1	951	LMIC.bcninfo.time = os_rlsbf4(&d[OFF_BCN_TIME]);
mluis	0:62d1edcc13d1	952	LMIC.bcninfo.flags \|= BCN_PARTIAL;
mluis	0:62d1edcc13d1	953
mluis	0:62d1edcc13d1	954	// Check 2nd set
mluis	0:62d1edcc13d1	955	if( os_rlsbf2(&d[OFF_BCN_CRC2]) != os_crc16(d,OFF_BCN_CRC2) )
mluis	1:d3b7bde3995c	956	return 1;
mluis	0:62d1edcc13d1	957	// Second set of fields is ok
mluis	0:62d1edcc13d1	958	LMIC.bcninfo.lat = (s4_t)os_rlsbf4(&d[OFF_BCN_LAT-1]) >> 8; // read as signed 24-bit
mluis	0:62d1edcc13d1	959	LMIC.bcninfo.lon = (s4_t)os_rlsbf4(&d[OFF_BCN_LON-1]) >> 8; // ditto
mluis	0:62d1edcc13d1	960	LMIC.bcninfo.info = d[OFF_BCN_INFO];
mluis	0:62d1edcc13d1	961	LMIC.bcninfo.flags \|= BCN_FULL;
mluis	0:62d1edcc13d1	962	return 2;
mluis	0:62d1edcc13d1	963	}
mluis	0:62d1edcc13d1	964
mluis	0:62d1edcc13d1	965
mluis	0:62d1edcc13d1	966	static bit_t decodeFrame (void) {
mluis	0:62d1edcc13d1	967	xref2u1_t d = LMIC.frame;
mluis	0:62d1edcc13d1	968	u1_t hdr = d[0];
mluis	0:62d1edcc13d1	969	u1_t ftype = hdr & HDR_FTYPE;
mluis	0:62d1edcc13d1	970	int dlen = LMIC.dataLen;
mluis	0:62d1edcc13d1	971	if( dlen < OFF_DAT_OPTS+4 \|\|
mluis	1:d3b7bde3995c	972	(hdr & HDR_MAJOR) != HDR_MAJOR_V1 \|\|
mluis	1:d3b7bde3995c	973	(ftype != HDR_FTYPE_DADN && ftype != HDR_FTYPE_DCDN) ) {
mluis	1:d3b7bde3995c	974	// Basic sanity checks failed
mluis	1:d3b7bde3995c	975	EV(specCond, WARN, (e_.reason = EV::specCond_t::UNEXPECTED_FRAME,
mluis	1:d3b7bde3995c	976	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	977	e_.info = dlen < 4 ? 0 : os_rlsbf4(&d[dlen-4]),
mluis	1:d3b7bde3995c	978	e_.info2 = hdr + (dlen<<8)));
mluis	0:62d1edcc13d1	979	norx:
mluis	1:d3b7bde3995c	980	LMIC.dataLen = 0;
mluis	1:d3b7bde3995c	981	return 0;
mluis	0:62d1edcc13d1	982	}
mluis	0:62d1edcc13d1	983	// Validate exact frame length
mluis	0:62d1edcc13d1	984	// Note: device address was already read+evaluated in order to arrive here.
mluis	0:62d1edcc13d1	985	int fct = d[OFF_DAT_FCT];
mluis	0:62d1edcc13d1	986	u4_t addr = os_rlsbf4(&d[OFF_DAT_ADDR]);
mluis	0:62d1edcc13d1	987	u4_t seqno = os_rlsbf2(&d[OFF_DAT_SEQNO]);
mluis	0:62d1edcc13d1	988	int olen = fct & FCT_OPTLEN;
mluis	0:62d1edcc13d1	989	int ackup = (fct & FCT_ACK) != 0 ? 1 : 0; // ACK last up frame
mluis	0:62d1edcc13d1	990	int poff = OFF_DAT_OPTS+olen;
mluis	0:62d1edcc13d1	991	int pend = dlen-4; // MIC
mluis	0:62d1edcc13d1	992
mluis	0:62d1edcc13d1	993	if( addr != LMIC.devaddr ) {
mluis	1:d3b7bde3995c	994	EV(specCond, WARN, (e_.reason = EV::specCond_t::ALIEN_ADDRESS,
mluis	1:d3b7bde3995c	995	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	996	e_.info = addr,
mluis	1:d3b7bde3995c	997	e_.info2 = LMIC.devaddr));
mluis	1:d3b7bde3995c	998	goto norx;
mluis	0:62d1edcc13d1	999	}
mluis	0:62d1edcc13d1	1000	if( poff > pend ) {
mluis	1:d3b7bde3995c	1001	EV(specCond, ERR, (e_.reason = EV::specCond_t::CORRUPTED_FRAME,
mluis	1:d3b7bde3995c	1002	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1003	e_.info = 0x1000000 + (poff-pend) + (fct<<8) + (dlen<<16)));
mluis	1:d3b7bde3995c	1004	goto norx;
mluis	0:62d1edcc13d1	1005	}
mluis	0:62d1edcc13d1	1006
mluis	0:62d1edcc13d1	1007	int port = -1;
mluis	0:62d1edcc13d1	1008	int replayConf = 0;
mluis	0:62d1edcc13d1	1009
mluis	0:62d1edcc13d1	1010	if( pend > poff )
mluis	1:d3b7bde3995c	1011	port = d[poff++];
mluis	0:62d1edcc13d1	1012
mluis	0:62d1edcc13d1	1013	seqno = LMIC.seqnoDn + (u2_t)(seqno - LMIC.seqnoDn);
mluis	0:62d1edcc13d1	1014
mluis	0:62d1edcc13d1	1015	if( !aes_verifyMic(LMIC.nwkKey, LMIC.devaddr, seqno, /dn/1, d, pend) ) {
mluis	1:d3b7bde3995c	1016	EV(spe3Cond, ERR, (e_.reason = EV::spe3Cond_t::CORRUPTED_MIC,
mluis	1:d3b7bde3995c	1017	e_.eui1 = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1018	e_.info1 = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1019	e_.info2 = seqno,
mluis	1:d3b7bde3995c	1020	e_.info3 = LMIC.devaddr));
mluis	0:62d1edcc13d1	1021	goto norx;
mluis	0:62d1edcc13d1	1022	}
mluis	1:d3b7bde3995c	1023	if( seqno < LMIC.seqnoDn ) {
mluis	1:d3b7bde3995c	1024	if( (s4_t)seqno > (s4_t)LMIC.seqnoDn ) {
mluis	1:d3b7bde3995c	1025	EV(specCond, INFO, (e_.reason = EV::specCond_t::DNSEQNO_ROLL_OVER,
mluis	1:d3b7bde3995c	1026	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1027	e_.info = LMIC.seqnoDn,
mluis	1:d3b7bde3995c	1028	e_.info2 = seqno));
mluis	1:d3b7bde3995c	1029	goto norx;
mluis	1:d3b7bde3995c	1030	}
mluis	1:d3b7bde3995c	1031	if( seqno != LMIC.seqnoDn-1 \|\| !LMIC.dnConf \|\| ftype != HDR_FTYPE_DCDN ) {
mluis	1:d3b7bde3995c	1032	EV(specCond, INFO, (e_.reason = EV::specCond_t::DNSEQNO_OBSOLETE,
mluis	1:d3b7bde3995c	1033	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1034	e_.info = LMIC.seqnoDn,
mluis	1:d3b7bde3995c	1035	e_.info2 = seqno));
mluis	1:d3b7bde3995c	1036	goto norx;
mluis	1:d3b7bde3995c	1037	}
mluis	1:d3b7bde3995c	1038	// Replay of previous sequence number allowed only if
mluis	1:d3b7bde3995c	1039	// previous frame and repeated both requested confirmation
mluis	1:d3b7bde3995c	1040	replayConf = 1;
mluis	0:62d1edcc13d1	1041	}
mluis	0:62d1edcc13d1	1042	else {
mluis	1:d3b7bde3995c	1043	if( seqno > LMIC.seqnoDn ) {
mluis	1:d3b7bde3995c	1044	EV(specCond, INFO, (e_.reason = EV::specCond_t::DNSEQNO_SKIP,
mluis	1:d3b7bde3995c	1045	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1046	e_.info = LMIC.seqnoDn,
mluis	1:d3b7bde3995c	1047	e_.info2 = seqno));
mluis	1:d3b7bde3995c	1048	}
mluis	1:d3b7bde3995c	1049	LMIC.seqnoDn = seqno+1; // next number to be expected
mluis	1:d3b7bde3995c	1050	DO_DEVDB(LMIC.seqnoDn,seqnoDn);
mluis	1:d3b7bde3995c	1051	// DN frame requested confirmation - provide ACK once with next UP frame
mluis	1:d3b7bde3995c	1052	LMIC.dnConf = (ftype == HDR_FTYPE_DCDN ? FCT_ACK : 0);
mluis	0:62d1edcc13d1	1053	}
mluis	0:62d1edcc13d1	1054
mluis	0:62d1edcc13d1	1055	if( LMIC.dnConf \|\| (fct & FCT_MORE) )
mluis	1:d3b7bde3995c	1056	LMIC.opmode \|= OP_POLL;
mluis	0:62d1edcc13d1	1057
mluis	0:62d1edcc13d1	1058	// We heard from network
mluis	1:d3b7bde3995c	1059	LMIC.adrChanged = LMIC.rejoinCnt = 0;
mluis	1:d3b7bde3995c	1060	if( LMIC.adrAckReq != LINK_CHECK_OFF )
mluis	1:d3b7bde3995c	1061	LMIC.adrAckReq = LINK_CHECK_INIT;
mluis	0:62d1edcc13d1	1062
mluis	0:62d1edcc13d1	1063	// Process OPTS
mluis	1:d3b7bde3995c	1064	int m = LMIC.rssi - RSSI_OFF - getSensitivity(LMIC.rps);
mluis	0:62d1edcc13d1	1065	LMIC.margin = m < 0 ? 0 : m > 254 ? 254 : m;
mluis	0:62d1edcc13d1	1066
mluis	0:62d1edcc13d1	1067	xref2u1_t opts = &d[OFF_DAT_OPTS];
mluis	0:62d1edcc13d1	1068	int oidx = 0;
mluis	0:62d1edcc13d1	1069	while( oidx < olen ) {
mluis	1:d3b7bde3995c	1070	switch( opts[oidx] ) {
mluis	1:d3b7bde3995c	1071	case MCMD_LCHK_ANS: {
mluis	1:d3b7bde3995c	1072	//int gwmargin = opts[oidx+1];
mluis	1:d3b7bde3995c	1073	//int ngws = opts[oidx+2];
mluis	1:d3b7bde3995c	1074	oidx += 3;
mluis	1:d3b7bde3995c	1075	continue;
mluis	1:d3b7bde3995c	1076	}
mluis	1:d3b7bde3995c	1077	case MCMD_LADR_REQ: {
mluis	1:d3b7bde3995c	1078	u1_t p1 = opts[oidx+1]; // txpow + DR
mluis	1:d3b7bde3995c	1079	u2_t chmap = os_rlsbf2(&opts[oidx+2]);// list of enabled channels
mluis	1:d3b7bde3995c	1080	u1_t chpage = opts[oidx+4] & MCMD_LADR_CHPAGE_MASK; // channel page
mluis	1:d3b7bde3995c	1081	u1_t uprpt = opts[oidx+4] & MCMD_LADR_REPEAT_MASK; // up repeat count
mluis	1:d3b7bde3995c	1082	oidx += 5;
mluis	0:62d1edcc13d1	1083
mluis	1:d3b7bde3995c	1084	LMIC.ladrAns = 0x80 \| // Include an answer into next frame up
mluis	1:d3b7bde3995c	1085	MCMD_LADR_ANS_POWACK \| MCMD_LADR_ANS_CHACK \| MCMD_LADR_ANS_DRACK;
mluis	1:d3b7bde3995c	1086	if( !mapChannels(chpage, chmap) )
mluis	1:d3b7bde3995c	1087	LMIC.ladrAns &= ~MCMD_LADR_ANS_CHACK;
mluis	1:d3b7bde3995c	1088	dr_t dr = (dr_t)(p1>>MCMD_LADR_DR_SHIFT);
mluis	1:d3b7bde3995c	1089	if( !validDR(dr) ) {
mluis	1:d3b7bde3995c	1090	LMIC.ladrAns &= ~MCMD_LADR_ANS_DRACK;
mluis	1:d3b7bde3995c	1091	EV(specCond, ERR, (e_.reason = EV::specCond_t::BAD_MAC_CMD,
mluis	1:d3b7bde3995c	1092	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1093	e_.info = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1094	e_.info2 = Base::msbf4(&opts[oidx-4])));
mluis	1:d3b7bde3995c	1095	}
mluis	1:d3b7bde3995c	1096	if( (LMIC.ladrAns & 0x7F) == (MCMD_LADR_ANS_POWACK \| MCMD_LADR_ANS_CHACK \| MCMD_LADR_ANS_DRACK) ) {
mluis	1:d3b7bde3995c	1097	// Nothing went wrong - use settings
mluis	1:d3b7bde3995c	1098	LMIC.upRepeat = uprpt;
mluis	1:d3b7bde3995c	1099	setDrTxpow(DRCHG_NWKCMD, dr, pow2dBm(p1));
mluis	1:d3b7bde3995c	1100	}
mluis	1:d3b7bde3995c	1101	LMIC.adrChanged = 1; // Trigger an ACK to NWK
mluis	1:d3b7bde3995c	1102	continue;
mluis	0:62d1edcc13d1	1103	}
mluis	1:d3b7bde3995c	1104	case MCMD_DEVS_REQ: {
mluis	1:d3b7bde3995c	1105	LMIC.devsAns = 1;
mluis	1:d3b7bde3995c	1106	oidx += 1;
mluis	1:d3b7bde3995c	1107	continue;
mluis	1:d3b7bde3995c	1108	}
mluis	1:d3b7bde3995c	1109	case MCMD_DN2P_SET: {
mluis	1:d3b7bde3995c	1110	dr_t dr = (dr_t)(opts[oidx+1] & 0x0F);
mluis	1:d3b7bde3995c	1111	u4_t freq = convFreq(&opts[oidx+2]);
mluis	1:d3b7bde3995c	1112	oidx += 5;
mluis	1:d3b7bde3995c	1113	LMIC.dn2Ans = 0x80; // answer pending
mluis	1:d3b7bde3995c	1114	if( validDR(dr) )
mluis	1:d3b7bde3995c	1115	LMIC.dn2Ans \|= MCMD_DN2P_ANS_DRACK;
mluis	1:d3b7bde3995c	1116	if( freq != 0 )
mluis	1:d3b7bde3995c	1117	LMIC.dn2Ans \|= MCMD_DN2P_ANS_CHACK;
mluis	1:d3b7bde3995c	1118	if( LMIC.dn2Ans == (0x80\|MCMD_DN2P_ANS_DRACK\|MCMD_DN2P_ANS_CHACK) ) {
mluis	1:d3b7bde3995c	1119	LMIC.dn2Dr = dr;
mluis	1:d3b7bde3995c	1120	LMIC.dn2Freq = freq;
mluis	1:d3b7bde3995c	1121	DO_DEVDB(LMIC.dn2Dr,dn2Dr);
mluis	1:d3b7bde3995c	1122	DO_DEVDB(LMIC.dn2Freq,dn2Freq);
mluis	1:d3b7bde3995c	1123	}
mluis	1:d3b7bde3995c	1124	continue;
mluis	0:62d1edcc13d1	1125	}
mluis	1:d3b7bde3995c	1126	case MCMD_DCAP_REQ: {
mluis	1:d3b7bde3995c	1127	u1_t cap = opts[oidx+1];
mluis	1:d3b7bde3995c	1128	oidx += 2;
mluis	1:d3b7bde3995c	1129	// A value cap=0xFF means device is OFF unless enabled again manually.
mluis	1:d3b7bde3995c	1130	if( cap==0xFF )
mluis	1:d3b7bde3995c	1131	LMIC.opmode \|= OP_SHUTDOWN; // stop any sending
mluis	1:d3b7bde3995c	1132	LMIC.globalDutyRate = cap & 0xF;
mluis	1:d3b7bde3995c	1133	LMIC.globalDutyAvail = os_getTime();
mluis	1:d3b7bde3995c	1134	DO_DEVDB(cap,dutyCap);
mluis	1:d3b7bde3995c	1135	LMIC.dutyCapAns = 1;
mluis	1:d3b7bde3995c	1136	continue;
mluis	1:d3b7bde3995c	1137	}
mluis	1:d3b7bde3995c	1138	case MCMD_SNCH_REQ: {
mluis	1:d3b7bde3995c	1139	u1_t chidx = opts[oidx+1]; // channel
mluis	1:d3b7bde3995c	1140	u4_t freq = convFreq(&opts[oidx+2]); // freq
mluis	1:d3b7bde3995c	1141	u1_t drs = opts[oidx+5]; // datarate span
mluis	1:d3b7bde3995c	1142	LMIC.snchAns = 0x80;
mluis	1:d3b7bde3995c	1143	if( freq != 0 && LMIC_setupChannel(chidx, freq, DR_RANGE_MAP(drs&0xF,drs>>4), -1) )
mluis	1:d3b7bde3995c	1144	LMIC.snchAns \|= MCMD_SNCH_ANS_DRACK\|MCMD_SNCH_ANS_FQACK;
mluis	1:d3b7bde3995c	1145	oidx += 6;
mluis	1:d3b7bde3995c	1146	continue;
mluis	0:62d1edcc13d1	1147	}
mluis	1:d3b7bde3995c	1148	case MCMD_PING_SET: {
mluis	1:d3b7bde3995c	1149	u4_t freq = convFreq(&opts[oidx+1]);
mluis	1:d3b7bde3995c	1150	oidx += 4;
mluis	1:d3b7bde3995c	1151	u1_t flags = 0x80;
mluis	1:d3b7bde3995c	1152	if( freq != 0 ) {
mluis	1:d3b7bde3995c	1153	flags \|= MCMD_PING_ANS_FQACK;
mluis	1:d3b7bde3995c	1154	LMIC.ping.freq = freq;
mluis	1:d3b7bde3995c	1155	DO_DEVDB(LMIC.ping.intvExp, pingIntvExp);
mluis	1:d3b7bde3995c	1156	DO_DEVDB(LMIC.ping.freq, pingFreq);
mluis	1:d3b7bde3995c	1157	DO_DEVDB(LMIC.ping.dr, pingDr);
mluis	1:d3b7bde3995c	1158	}
mluis	1:d3b7bde3995c	1159	LMIC.pingSetAns = flags;
mluis	1:d3b7bde3995c	1160	continue;
mluis	1:d3b7bde3995c	1161	}
mluis	1:d3b7bde3995c	1162	case MCMD_BCNI_ANS: {
mluis	1:d3b7bde3995c	1163	// Ignore if tracking already enabled
mluis	1:d3b7bde3995c	1164	if( (LMIC.opmode & OP_TRACK) == 0 ) {
mluis	1:d3b7bde3995c	1165	LMIC.bcnChnl = opts[oidx+3];
mluis	1:d3b7bde3995c	1166	// Enable tracking - bcninfoTries
mluis	1:d3b7bde3995c	1167	LMIC.opmode \|= OP_TRACK;
mluis	1:d3b7bde3995c	1168	// Cleared later in txComplete handling - triggers EV_BEACON_FOUND
mluis	1:d3b7bde3995c	1169	ASSERT(LMIC.bcninfoTries!=0);
mluis	1:d3b7bde3995c	1170	// Setup RX parameters
mluis	1:d3b7bde3995c	1171	LMIC.bcninfo.txtime = (LMIC.rxtime
mluis	1:d3b7bde3995c	1172	+ ms2osticks(os_rlsbf2(&opts[oidx+1]) * MCMD_BCNI_TUNIT)
mluis	1:d3b7bde3995c	1173	+ ms2osticksCeil(MCMD_BCNI_TUNIT/2)
mluis	1:d3b7bde3995c	1174	- BCN_INTV_osticks);
mluis	1:d3b7bde3995c	1175	LMIC.bcninfo.flags = 0; // txtime above cannot be used as reference (BCN_PARTIAL\|BCN_FULL cleared)
mluis	1:d3b7bde3995c	1176	calcBcnRxWindowFromMillis(MCMD_BCNI_TUNIT,1); // error of +/-N ms
mluis	0:62d1edcc13d1	1177
mluis	1:d3b7bde3995c	1178	EV(lostFrame, INFO, (e_.reason = EV::lostFrame_t::MCMD_BCNI_ANS,
mluis	1:d3b7bde3995c	1179	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1180	e_.lostmic = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1181	e_.info = (LMIC.missedBcns \|
mluis	1:d3b7bde3995c	1182	(osticks2us(LMIC.bcninfo.txtime + BCN_INTV_osticks
mluis	1:d3b7bde3995c	1183	- LMIC.bcnRxtime) << 8)),
mluis	1:d3b7bde3995c	1184	e_.time = MAIN::CDEV->ostime2ustime(LMIC.bcninfo.txtime + BCN_INTV_osticks)));
mluis	1:d3b7bde3995c	1185	}
mluis	1:d3b7bde3995c	1186	oidx += 4;
mluis	1:d3b7bde3995c	1187	continue;
mluis	0:62d1edcc13d1	1188	}
mluis	1:d3b7bde3995c	1189	}
mluis	1:d3b7bde3995c	1190	EV(specCond, ERR, (e_.reason = EV::specCond_t::BAD_MAC_CMD,
mluis	1:d3b7bde3995c	1191	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1192	e_.info = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1193	e_.info2 = Base::msbf4(&opts[oidx])));
mluis	1:d3b7bde3995c	1194	break;
mluis	0:62d1edcc13d1	1195	}
mluis	0:62d1edcc13d1	1196	if( oidx != olen ) {
mluis	1:d3b7bde3995c	1197	EV(specCond, ERR, (e_.reason = EV::specCond_t::CORRUPTED_FRAME,
mluis	1:d3b7bde3995c	1198	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1199	e_.info = 0x1000000 + (oidx) + (olen<<8)));
mluis	0:62d1edcc13d1	1200	}
mluis	0:62d1edcc13d1	1201
mluis	0:62d1edcc13d1	1202	if( !replayConf ) {
mluis	1:d3b7bde3995c	1203	// Handle payload only if not a replay
mluis	1:d3b7bde3995c	1204	// Decrypt payload - if any
mluis	1:d3b7bde3995c	1205	if( port >= 0 && pend-poff > 0 )
mluis	1:d3b7bde3995c	1206	aes_cipher(port <= 0 ? LMIC.nwkKey : LMIC.artKey, LMIC.devaddr, seqno, /dn/1, d+poff, pend-poff);
mluis	0:62d1edcc13d1	1207
mluis	1:d3b7bde3995c	1208	EV(dfinfo, DEBUG, (e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1209	e_.devaddr = LMIC.devaddr,
mluis	1:d3b7bde3995c	1210	e_.seqno = seqno,
mluis	1:d3b7bde3995c	1211	e_.flags = (port < 0 ? EV::dfinfo_t::NOPORT : 0) \| EV::dfinfo_t::DN,
mluis	1:d3b7bde3995c	1212	e_.mic = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1213	e_.hdr = d[LORA::OFF_DAT_HDR],
mluis	1:d3b7bde3995c	1214	e_.fct = d[LORA::OFF_DAT_FCT],
mluis	1:d3b7bde3995c	1215	e_.port = port,
mluis	1:d3b7bde3995c	1216	e_.plen = dlen,
mluis	1:d3b7bde3995c	1217	e_.opts.length = olen,
mluis	1:d3b7bde3995c	1218	memcpy(&e_.opts[0], opts, olen)));
mluis	0:62d1edcc13d1	1219	} else {
mluis	1:d3b7bde3995c	1220	EV(specCond, INFO, (e_.reason = EV::specCond_t::DNSEQNO_REPLAY,
mluis	1:d3b7bde3995c	1221	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1222	e_.info = Base::lsbf4(&d[pend]),
mluis	1:d3b7bde3995c	1223	e_.info2 = seqno));
mluis	0:62d1edcc13d1	1224	}
mluis	0:62d1edcc13d1	1225
mluis	0:62d1edcc13d1	1226	if( // NWK acks but we don't have a frame pending
mluis	1:d3b7bde3995c	1227	(ackup && LMIC.txCnt == 0) \|\|
mluis	1:d3b7bde3995c	1228	// We sent up confirmed and we got a response in DNW1/DNW2
mluis	1:d3b7bde3995c	1229	// BUT it did not carry an ACK - this should never happen
mluis	1:d3b7bde3995c	1230	// Do not resend and assume frame was not ACKed.
mluis	1:d3b7bde3995c	1231	(!ackup && LMIC.txCnt != 0) ) {
mluis	1:d3b7bde3995c	1232	EV(specCond, ERR, (e_.reason = EV::specCond_t::SPURIOUS_ACK,
mluis	1:d3b7bde3995c	1233	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1234	e_.info = seqno,
mluis	1:d3b7bde3995c	1235	e_.info2 = ackup));
mluis	0:62d1edcc13d1	1236	}
mluis	0:62d1edcc13d1	1237
mluis	0:62d1edcc13d1	1238	if( LMIC.txCnt != 0 ) // we requested an ACK
mluis	1:d3b7bde3995c	1239	LMIC.txrxFlags \|= ackup ? TXRX_ACK : TXRX_NACK;
mluis	0:62d1edcc13d1	1240
mluis	0:62d1edcc13d1	1241	if( port < 0 ) {
mluis	1:d3b7bde3995c	1242	LMIC.txrxFlags \|= TXRX_NOPORT;
mluis	1:d3b7bde3995c	1243	LMIC.dataBeg = poff;
mluis	1:d3b7bde3995c	1244	LMIC.dataLen = 0;
mluis	0:62d1edcc13d1	1245	} else {
mluis	1:d3b7bde3995c	1246	LMIC.txrxFlags \|= TXRX_PORT;
mluis	1:d3b7bde3995c	1247	LMIC.dataBeg = poff;
mluis	1:d3b7bde3995c	1248	LMIC.dataLen = pend-poff;
mluis	0:62d1edcc13d1	1249	}
mluis	0:62d1edcc13d1	1250	return 1;
mluis	0:62d1edcc13d1	1251	}
mluis	0:62d1edcc13d1	1252
mluis	0:62d1edcc13d1	1253
mluis	0:62d1edcc13d1	1254	// ================================================================================
mluis	0:62d1edcc13d1	1255	// TX/RX transaction support
mluis	0:62d1edcc13d1	1256
mluis	0:62d1edcc13d1	1257
mluis	0:62d1edcc13d1	1258	static void setupRx2 (void) {
mluis	0:62d1edcc13d1	1259	LMIC.txrxFlags = TXRX_DNW2;
mluis	0:62d1edcc13d1	1260	LMIC.rps = dndr2rps(LMIC.dn2Dr);
mluis	0:62d1edcc13d1	1261	LMIC.freq = LMIC.dn2Freq;
mluis	0:62d1edcc13d1	1262	LMIC.dataLen = 0;
mluis	0:62d1edcc13d1	1263	os_radio(RADIO_RX);
mluis	0:62d1edcc13d1	1264	}
mluis	0:62d1edcc13d1	1265
mluis	0:62d1edcc13d1	1266
mluis	0:62d1edcc13d1	1267	static void schedRx2 (ostime_t delay, osjobcb_t func) {
mluis	0:62d1edcc13d1	1268	// Add 1.5 symbols we need 5 out of 8. Try to sync 1.5 symbols into the preamble.
mluis	0:62d1edcc13d1	1269	LMIC.rxtime = LMIC.txend + delay + (PAMBL_SYMS-MINRX_SYMS)*dr2hsym(LMIC.dn2Dr);
mluis	0:62d1edcc13d1	1270	os_setTimedCallback(&LMIC.osjob, LMIC.rxtime - RX_RAMPUP, func);
mluis	0:62d1edcc13d1	1271	}
mluis	0:62d1edcc13d1	1272
mluis	0:62d1edcc13d1	1273	static void setupRx1 (osjobcb_t func) {
mluis	0:62d1edcc13d1	1274	LMIC.txrxFlags = TXRX_DNW1;
mluis	0:62d1edcc13d1	1275	// Turn LMIC.rps from TX over to RX
mluis	0:62d1edcc13d1	1276	LMIC.rps = setNocrc(LMIC.rps,1);
mluis	0:62d1edcc13d1	1277	LMIC.dataLen = 0;
mluis	0:62d1edcc13d1	1278	LMIC.osjob.func = func;
mluis	0:62d1edcc13d1	1279	os_radio(RADIO_RX);
mluis	0:62d1edcc13d1	1280	}
mluis	0:62d1edcc13d1	1281
mluis	0:62d1edcc13d1	1282
mluis	0:62d1edcc13d1	1283	// Called by HAL once TX complete and delivers exact end of TX time stamp in LMIC.rxtime
mluis	0:62d1edcc13d1	1284	static void txDone (ostime_t delay, osjobcb_t func) {
mluis	0:62d1edcc13d1	1285	if( (LMIC.opmode & (OP_TRACK\|OP_PINGABLE\|OP_PINGINI)) == (OP_TRACK\|OP_PINGABLE) ) {
mluis	1:d3b7bde3995c	1286	rxschedInit(&LMIC.ping); // note: reuses LMIC.frame buffer!
mluis	1:d3b7bde3995c	1287	LMIC.opmode \|= OP_PINGINI;
mluis	0:62d1edcc13d1	1288	}
mluis	0:62d1edcc13d1	1289	// Change RX frequency / rps (US only) before we increment txChnl
mluis	0:62d1edcc13d1	1290	setRx1Params();
mluis	0:62d1edcc13d1	1291	// LMIC.rxsyms carries the TX datarate (can be != LMIC.datarate [confirm retries etc.])
mluis	0:62d1edcc13d1	1292	// Setup receive - LMIC.rxtime is preloaded with 1.5 symbols offset to tune
mluis	0:62d1edcc13d1	1293	// into the middle of the 8 symbols preamble.
mluis	1:d3b7bde3995c	1294	#if defined(CFG_eu868)
mluis	0:62d1edcc13d1	1295	if( /* TX datarate */LMIC.rxsyms == DR_FSK ) {
mluis	1:d3b7bde3995c	1296	LMIC.rxtime = LMIC.txend + delay - PRERX_FSK*us2osticksRound(160);
mluis	1:d3b7bde3995c	1297	LMIC.rxsyms = RXLEN_FSK;
mluis	0:62d1edcc13d1	1298	}
mluis	0:62d1edcc13d1	1299	else
mluis	0:62d1edcc13d1	1300	#endif
mluis	0:62d1edcc13d1	1301	{
mluis	1:d3b7bde3995c	1302	LMIC.rxtime = LMIC.txend + delay + (PAMBL_SYMS-MINRX_SYMS)*dr2hsym(LMIC.dndr);
mluis	1:d3b7bde3995c	1303	LMIC.rxsyms = MINRX_SYMS;
mluis	0:62d1edcc13d1	1304	}
mluis	0:62d1edcc13d1	1305	os_setTimedCallback(&LMIC.osjob, LMIC.rxtime - RX_RAMPUP, func);
mluis	0:62d1edcc13d1	1306	}
mluis	0:62d1edcc13d1	1307
mluis	0:62d1edcc13d1	1308
mluis	0:62d1edcc13d1	1309	// ======================================== Join frames
mluis	0:62d1edcc13d1	1310
mluis	0:62d1edcc13d1	1311
mluis	0:62d1edcc13d1	1312	static void onJoinFailed (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1313	// Notify app - must call LMIC_reset() to stop joining
mluis	0:62d1edcc13d1	1314	// otherwise join procedure continues.
mluis	0:62d1edcc13d1	1315	reportEvent(EV_JOIN_FAILED);
mluis	0:62d1edcc13d1	1316	}
mluis	0:62d1edcc13d1	1317
mluis	0:62d1edcc13d1	1318
mluis	0:62d1edcc13d1	1319	static bit_t processJoinAccept (void) {
mluis	0:62d1edcc13d1	1320	ASSERT(LMIC.txrxFlags != TXRX_DNW1 \|\| LMIC.dataLen != 0);
mluis	0:62d1edcc13d1	1321	ASSERT((LMIC.opmode & OP_TXRXPEND)!=0);
mluis	0:62d1edcc13d1	1322
mluis	0:62d1edcc13d1	1323	if( LMIC.dataLen == 0 ) {
mluis	0:62d1edcc13d1	1324	nojoinframe:
mluis	1:d3b7bde3995c	1325	if( (LMIC.opmode & OP_JOINING) == 0 ) {
mluis	1:d3b7bde3995c	1326	ASSERT((LMIC.opmode & OP_REJOIN) != 0);
mluis	1:d3b7bde3995c	1327	// REJOIN attempt for roaming
mluis	1:d3b7bde3995c	1328	LMIC.opmode &= ~(OP_REJOIN\|OP_TXRXPEND);
mluis	1:d3b7bde3995c	1329	if( LMIC.rejoinCnt < 10 )
mluis	1:d3b7bde3995c	1330	LMIC.rejoinCnt++;
mluis	1:d3b7bde3995c	1331	reportEvent(EV_REJOIN_FAILED);
mluis	1:d3b7bde3995c	1332	return 1;
mluis	1:d3b7bde3995c	1333	}
mluis	1:d3b7bde3995c	1334	LMIC.opmode &= ~OP_TXRXPEND;
mluis	1:d3b7bde3995c	1335	ostime_t delay = nextJoinState();
mluis	1:d3b7bde3995c	1336	EV(devCond, DEBUG, (e_.reason = EV::devCond_t::NO_JACC,
mluis	1:d3b7bde3995c	1337	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1338	e_.info = LMIC.datarate\|DR_PAGE,
mluis	1:d3b7bde3995c	1339	e_.info2 = osticks2ms(delay)));
mluis	1:d3b7bde3995c	1340	// Build next JOIN REQUEST with next engineUpdate call
mluis	1:d3b7bde3995c	1341	// Optionally, report join failed.
mluis	1:d3b7bde3995c	1342	// Both after a random/chosen amount of ticks.
mluis	1:d3b7bde3995c	1343	os_setTimedCallback(&LMIC.osjob, os_getTime()+delay,
mluis	1:d3b7bde3995c	1344	(delay&1) != 0
mluis	1:d3b7bde3995c	1345	? FUNC_ADDR(onJoinFailed) // one JOIN iteration done and failed
mluis	1:d3b7bde3995c	1346	: FUNC_ADDR(runEngineUpdate)); // next step to be delayed
mluis	0:62d1edcc13d1	1347	return 1;
mluis	0:62d1edcc13d1	1348	}
mluis	0:62d1edcc13d1	1349	u1_t hdr = LMIC.frame[0];
mluis	0:62d1edcc13d1	1350	u1_t dlen = LMIC.dataLen;
mluis	0:62d1edcc13d1	1351	u4_t mic = os_rlsbf4(&LMIC.frame[dlen-4]); // safe before modified by encrypt!
mluis	0:62d1edcc13d1	1352	if( (dlen != LEN_JA && dlen != LEN_JAEXT)
mluis	1:d3b7bde3995c	1353	\|\| (hdr & (HDR_FTYPE\|HDR_MAJOR)) != (HDR_FTYPE_JACC\|HDR_MAJOR_V1) ) {
mluis	1:d3b7bde3995c	1354	EV(specCond, ERR, (e_.reason = EV::specCond_t::UNEXPECTED_FRAME,
mluis	1:d3b7bde3995c	1355	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1356	e_.info = dlen < 4 ? 0 : mic,
mluis	1:d3b7bde3995c	1357	e_.info2 = hdr + (dlen<<8)));
mluis	0:62d1edcc13d1	1358	badframe:
mluis	1:d3b7bde3995c	1359	if( (LMIC.txrxFlags & TXRX_DNW1) != 0 )
mluis	1:d3b7bde3995c	1360	return 0;
mluis	1:d3b7bde3995c	1361	goto nojoinframe;
mluis	0:62d1edcc13d1	1362	}
mluis	0:62d1edcc13d1	1363	aes_encrypt(LMIC.frame+1, dlen-1);
mluis	0:62d1edcc13d1	1364	if( !aes_verifyMic0(LMIC.frame, dlen-4) ) {
mluis	1:d3b7bde3995c	1365	EV(specCond, ERR, (e_.reason = EV::specCond_t::JOIN_BAD_MIC,
mluis	1:d3b7bde3995c	1366	e_.info = mic));
mluis	1:d3b7bde3995c	1367	goto badframe;
mluis	0:62d1edcc13d1	1368	}
mluis	0:62d1edcc13d1	1369
mluis	0:62d1edcc13d1	1370	u4_t addr = os_rlsbf4(LMIC.frame+OFF_JA_DEVADDR);
mluis	0:62d1edcc13d1	1371	LMIC.devaddr = addr;
mluis	1:d3b7bde3995c	1372	LMIC.netid = os_rlsbf4(&LMIC.frame[OFF_JA_NETID]) & 0xFFFFFF;
mluis	0:62d1edcc13d1	1373
mluis	1:d3b7bde3995c	1374	#if defined(CFG_eu868)
mluis	0:62d1edcc13d1	1375	initDefaultChannels(0);
mluis	0:62d1edcc13d1	1376	#endif
mluis	0:62d1edcc13d1	1377	if( dlen > LEN_JA ) {
mluis	1:d3b7bde3995c	1378	dlen = OFF_CFLIST;
mluis	1:d3b7bde3995c	1379	#if defined(CFG_eu868)
mluis	1:d3b7bde3995c	1380	u1_t chidx=3;
mluis	1:d3b7bde3995c	1381	#elif defined(CFG_us915)
mluis	1:d3b7bde3995c	1382	u1_t chidx=72;
mluis	0:62d1edcc13d1	1383	#endif
mluis	1:d3b7bde3995c	1384	for( ; chidx<8; chidx++, dlen+=3 )
mluis	1:d3b7bde3995c	1385	LMIC_setupChannel(chidx, os_rlsbf4(&LMIC.frame[dlen-1]) >> 8, 0, -1);
mluis	0:62d1edcc13d1	1386	}
mluis	0:62d1edcc13d1	1387
mluis	0:62d1edcc13d1	1388	// already incremented when JOIN REQ got sent off
mluis	0:62d1edcc13d1	1389	aes_sessKeys(LMIC.devNonce-1, &LMIC.frame[OFF_JA_ARTNONCE], LMIC.nwkKey, LMIC.artKey);
mluis	1:d3b7bde3995c	1390	DO_DEVDB(LMIC.netid, netid);
mluis	1:d3b7bde3995c	1391	DO_DEVDB(LMIC.devaddr, devaddr);
mluis	1:d3b7bde3995c	1392	DO_DEVDB(LMIC.nwkKey, nwkkey);
mluis	1:d3b7bde3995c	1393	DO_DEVDB(LMIC.artKey, artkey);
mluis	0:62d1edcc13d1	1394
mluis	0:62d1edcc13d1	1395	EV(joininfo, INFO, (e_.arteui = MAIN::CDEV->getArtEui(),
mluis	1:d3b7bde3995c	1396	e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1397	e_.devaddr = LMIC.devaddr,
mluis	1:d3b7bde3995c	1398	e_.oldaddr = oldaddr,
mluis	1:d3b7bde3995c	1399	e_.nonce = LMIC.devNonce-1,
mluis	1:d3b7bde3995c	1400	e_.mic = mic,
mluis	1:d3b7bde3995c	1401	e_.reason = ((LMIC.opmode & OP_REJOIN) != 0
mluis	1:d3b7bde3995c	1402	? EV::joininfo_t::REJOIN_ACCEPT
mluis	1:d3b7bde3995c	1403	: EV::joininfo_t::ACCEPT)));
mluis	0:62d1edcc13d1	1404
mluis	0:62d1edcc13d1	1405	ASSERT((LMIC.opmode & (OP_JOINING\|OP_REJOIN))!=0);
mluis	0:62d1edcc13d1	1406	if( (LMIC.opmode & OP_REJOIN) != 0 ) {
mluis	1:d3b7bde3995c	1407	// Lower DR every try below current UP DR
mluis	1:d3b7bde3995c	1408	LMIC.datarate = lowerDR(LMIC.datarate, LMIC.rejoinCnt);
mluis	0:62d1edcc13d1	1409	}
mluis	0:62d1edcc13d1	1410	LMIC.opmode &= ~(OP_JOINING\|OP_TRACK\|OP_REJOIN\|OP_TXRXPEND\|OP_PINGINI) \| OP_NEXTCHNL;
mluis	0:62d1edcc13d1	1411	stateJustJoined();
mluis	0:62d1edcc13d1	1412	reportEvent(EV_JOINED);
mluis	0:62d1edcc13d1	1413	return 1;
mluis	0:62d1edcc13d1	1414	}
mluis	0:62d1edcc13d1	1415
mluis	1:d3b7bde3995c	1416
mluis	1:d3b7bde3995c	1417	static void processRx2Jacc (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1418	if( LMIC.dataLen == 0 )
mluis	1:d3b7bde3995c	1419	LMIC.txrxFlags = 0; // nothing in 1st/2nd DN slot
mluis	0:62d1edcc13d1	1420	processJoinAccept();
mluis	0:62d1edcc13d1	1421	}
mluis	0:62d1edcc13d1	1422
mluis	1:d3b7bde3995c	1423
mluis	1:d3b7bde3995c	1424	static void setupRx2Jacc (xref2osjob_t osjob) {
mluis	1:d3b7bde3995c	1425	LMIC.osjob.func = FUNC_ADDR(processRx2Jacc);
mluis	1:d3b7bde3995c	1426	setupRx2();
mluis	1:d3b7bde3995c	1427	}
mluis	1:d3b7bde3995c	1428
mluis	1:d3b7bde3995c	1429
mluis	1:d3b7bde3995c	1430	static void processRx1Jacc (xref2osjob_t osjob) {
mluis	1:d3b7bde3995c	1431	if( LMIC.dataLen == 0 \|\| !processJoinAccept() )
mluis	1:d3b7bde3995c	1432	schedRx2(DELAY_JACC2_osticks, FUNC_ADDR(setupRx2Jacc));
mluis	1:d3b7bde3995c	1433	}
mluis	1:d3b7bde3995c	1434
mluis	1:d3b7bde3995c	1435
mluis	0:62d1edcc13d1	1436	static void setupRx1Jacc (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1437	setupRx1(FUNC_ADDR(processRx1Jacc));
mluis	0:62d1edcc13d1	1438	}
mluis	0:62d1edcc13d1	1439
mluis	0:62d1edcc13d1	1440
mluis	0:62d1edcc13d1	1441	static void jreqDone (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1442	txDone(DELAY_JACC1_osticks, FUNC_ADDR(setupRx1Jacc));
mluis	0:62d1edcc13d1	1443	}
mluis	0:62d1edcc13d1	1444
mluis	0:62d1edcc13d1	1445	// ======================================== Data frames
mluis	0:62d1edcc13d1	1446
mluis	0:62d1edcc13d1	1447	// Fwd decl.
mluis	0:62d1edcc13d1	1448	static bit_t processDnData(void);
mluis	0:62d1edcc13d1	1449
mluis	1:d3b7bde3995c	1450	static void processRx2DnDataDelay (xref2osjob_t osjob) {
mluis	1:d3b7bde3995c	1451	processDnData();
mluis	1:d3b7bde3995c	1452	}
mluis	1:d3b7bde3995c	1453
mluis	0:62d1edcc13d1	1454	static void processRx2DnData (xref2osjob_t osjob) {
mluis	1:d3b7bde3995c	1455	if( LMIC.dataLen == 0 ) {
mluis	1:d3b7bde3995c	1456	LMIC.txrxFlags = 0; // nothing in 1st/2nd DN slot
mluis	1:d3b7bde3995c	1457	// Delay callback processing to avoid up TX while gateway is txing our missed frame!
mluis	1:d3b7bde3995c	1458	// Since DNW2 uses SF12 by default we wait 3 secs.
mluis	1:d3b7bde3995c	1459	os_setTimedCallback(&LMIC.osjob,
mluis	1:d3b7bde3995c	1460	(os_getTime() + DNW2_SAFETY_ZONE + rndDelay(2)),
mluis	1:d3b7bde3995c	1461	processRx2DnDataDelay);
mluis	1:d3b7bde3995c	1462	return;
mluis	1:d3b7bde3995c	1463	}
mluis	0:62d1edcc13d1	1464	processDnData();
mluis	0:62d1edcc13d1	1465	}
mluis	0:62d1edcc13d1	1466
mluis	0:62d1edcc13d1	1467
mluis	0:62d1edcc13d1	1468	static void setupRx2DnData (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1469	LMIC.osjob.func = FUNC_ADDR(processRx2DnData);
mluis	0:62d1edcc13d1	1470	setupRx2();
mluis	0:62d1edcc13d1	1471	}
mluis	0:62d1edcc13d1	1472
mluis	0:62d1edcc13d1	1473
mluis	0:62d1edcc13d1	1474	static void processRx1DnData (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1475	if( LMIC.dataLen == 0 \|\| !processDnData() )
mluis	1:d3b7bde3995c	1476	schedRx2(DELAY_DNW2_osticks, FUNC_ADDR(setupRx2DnData));
mluis	0:62d1edcc13d1	1477	}
mluis	0:62d1edcc13d1	1478
mluis	0:62d1edcc13d1	1479
mluis	0:62d1edcc13d1	1480	static void setupRx1DnData (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1481	setupRx1(FUNC_ADDR(processRx1DnData));
mluis	0:62d1edcc13d1	1482	}
mluis	0:62d1edcc13d1	1483
mluis	0:62d1edcc13d1	1484
mluis	0:62d1edcc13d1	1485	static void updataDone (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1486	txDone(DELAY_DNW1_osticks, FUNC_ADDR(setupRx1DnData));
mluis	0:62d1edcc13d1	1487	}
mluis	0:62d1edcc13d1	1488
mluis	0:62d1edcc13d1	1489	// ========================================
mluis	0:62d1edcc13d1	1490
mluis	0:62d1edcc13d1	1491
mluis	0:62d1edcc13d1	1492	static void buildDataFrame (void) {
mluis	0:62d1edcc13d1	1493	bit_t txdata = ((LMIC.opmode & (OP_TXDATA\|OP_POLL)) != OP_POLL);
mluis	0:62d1edcc13d1	1494	u1_t dlen = txdata ? LMIC.pendTxLen : 0;
mluis	0:62d1edcc13d1	1495
mluis	0:62d1edcc13d1	1496	// Piggyback MAC options
mluis	0:62d1edcc13d1	1497	// Prioritize by importance
mluis	0:62d1edcc13d1	1498	int end = OFF_DAT_OPTS;
mluis	0:62d1edcc13d1	1499	if( (LMIC.opmode & (OP_TRACK\|OP_PINGABLE)) == (OP_TRACK\|OP_PINGABLE) ) {
mluis	1:d3b7bde3995c	1500	// Indicate pingability in every UP frame
mluis	1:d3b7bde3995c	1501	LMIC.frame[end] = MCMD_PING_IND;
mluis	1:d3b7bde3995c	1502	LMIC.frame[end+1] = LMIC.ping.dr \| (LMIC.ping.intvExp<<4);
mluis	1:d3b7bde3995c	1503	end += 2;
mluis	0:62d1edcc13d1	1504	}
mluis	0:62d1edcc13d1	1505	if( LMIC.dutyCapAns ) {
mluis	1:d3b7bde3995c	1506	LMIC.frame[end] = MCMD_DCAP_ANS;
mluis	1:d3b7bde3995c	1507	end += 1;
mluis	1:d3b7bde3995c	1508	LMIC.dutyCapAns = 0;
mluis	0:62d1edcc13d1	1509	}
mluis	0:62d1edcc13d1	1510	if( LMIC.dn2Ans ) {
mluis	1:d3b7bde3995c	1511	LMIC.frame[end+0] = MCMD_DN2P_ANS;
mluis	1:d3b7bde3995c	1512	LMIC.frame[end+1] = LMIC.dn2Ans & ~MCMD_DN2P_ANS_RFU;
mluis	1:d3b7bde3995c	1513	end += 2;
mluis	1:d3b7bde3995c	1514	LMIC.dn2Ans = 0;
mluis	0:62d1edcc13d1	1515	}
mluis	0:62d1edcc13d1	1516	if( LMIC.devsAns ) { // answer to device status
mluis	1:d3b7bde3995c	1517	LMIC.frame[end+0] = MCMD_DEVS_ANS;
mluis	1:d3b7bde3995c	1518	LMIC.frame[end+1] = LMIC.margin;
mluis	1:d3b7bde3995c	1519	LMIC.frame[end+2] = os_getBattLevel();
mluis	1:d3b7bde3995c	1520	end += 3;
mluis	1:d3b7bde3995c	1521	LMIC.devsAns = 0;
mluis	0:62d1edcc13d1	1522	}
mluis	0:62d1edcc13d1	1523	if( LMIC.ladrAns ) { // answer to ADR change
mluis	1:d3b7bde3995c	1524	LMIC.frame[end+0] = MCMD_LADR_ANS;
mluis	1:d3b7bde3995c	1525	LMIC.frame[end+1] = LMIC.ladrAns & ~MCMD_LADR_ANS_RFU;
mluis	1:d3b7bde3995c	1526	end += 2;
mluis	1:d3b7bde3995c	1527	LMIC.ladrAns = 0;
mluis	0:62d1edcc13d1	1528	}
mluis	0:62d1edcc13d1	1529	if( LMIC.bcninfoTries > 0 ) {
mluis	1:d3b7bde3995c	1530	LMIC.frame[end] = MCMD_BCNI_REQ;
mluis	1:d3b7bde3995c	1531	end += 1;
mluis	0:62d1edcc13d1	1532	}
mluis	0:62d1edcc13d1	1533	if( LMIC.adrChanged ) {
mluis	1:d3b7bde3995c	1534	if( LMIC.adrAckReq < 0 )
mluis	1:d3b7bde3995c	1535	LMIC.adrAckReq = 0;
mluis	1:d3b7bde3995c	1536	LMIC.adrChanged = 0;
mluis	0:62d1edcc13d1	1537	}
mluis	0:62d1edcc13d1	1538	if( LMIC.pingSetAns != 0 ) {
mluis	1:d3b7bde3995c	1539	LMIC.frame[end+0] = MCMD_PING_ANS;
mluis	1:d3b7bde3995c	1540	LMIC.frame[end+1] = LMIC.pingSetAns & ~MCMD_PING_ANS_RFU;
mluis	1:d3b7bde3995c	1541	end += 2;
mluis	1:d3b7bde3995c	1542	LMIC.pingSetAns = 0;
mluis	0:62d1edcc13d1	1543	}
mluis	0:62d1edcc13d1	1544	if( LMIC.snchAns ) {
mluis	1:d3b7bde3995c	1545	LMIC.frame[end+0] = MCMD_SNCH_ANS;
mluis	1:d3b7bde3995c	1546	LMIC.frame[end+1] = LMIC.snchAns & ~MCMD_SNCH_ANS_RFU;
mluis	1:d3b7bde3995c	1547	end += 2;
mluis	1:d3b7bde3995c	1548	LMIC.snchAns = 0;
mluis	0:62d1edcc13d1	1549	}
mluis	0:62d1edcc13d1	1550	ASSERT(end <= OFF_DAT_OPTS+16);
mluis	0:62d1edcc13d1	1551
mluis	0:62d1edcc13d1	1552	u1_t flen = end + (txdata ? 5+dlen : 4);
mluis	0:62d1edcc13d1	1553	if( flen > MAX_LEN_FRAME ) {
mluis	1:d3b7bde3995c	1554	// Options and payload too big - delay payload
mluis	1:d3b7bde3995c	1555	txdata = 0;
mluis	1:d3b7bde3995c	1556	flen = end+4;
mluis	0:62d1edcc13d1	1557	}
mluis	0:62d1edcc13d1	1558	LMIC.frame[OFF_DAT_HDR] = HDR_FTYPE_DAUP \| HDR_MAJOR_V1;
mluis	0:62d1edcc13d1	1559	LMIC.frame[OFF_DAT_FCT] = (LMIC.dnConf \| LMIC.adrEnabled
mluis	1:d3b7bde3995c	1560	\| (LMIC.adrAckReq >= 0 ? FCT_ADRARQ : 0)
mluis	1:d3b7bde3995c	1561	\| (end-OFF_DAT_OPTS));
mluis	0:62d1edcc13d1	1562	os_wlsbf4(LMIC.frame+OFF_DAT_ADDR, LMIC.devaddr);
mluis	0:62d1edcc13d1	1563
mluis	0:62d1edcc13d1	1564	if( LMIC.txCnt == 0 ) {
mluis	1:d3b7bde3995c	1565	LMIC.seqnoUp += 1;
mluis	1:d3b7bde3995c	1566	DO_DEVDB(LMIC.seqnoUp,seqnoUp);
mluis	0:62d1edcc13d1	1567	} else {
mluis	1:d3b7bde3995c	1568	EV(devCond, INFO, (e_.reason = EV::devCond_t::RE_TX,
mluis	1:d3b7bde3995c	1569	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1570	e_.info = LMIC.seqnoUp-1,
mluis	1:d3b7bde3995c	1571	e_.info2 = ((LMIC.txCnt+1) \|
mluis	1:d3b7bde3995c	1572	(DRADJUST[LMIC.txCnt+1] << 8) \|
mluis	1:d3b7bde3995c	1573	((LMIC.datarate\|DR_PAGE)<<16))));
mluis	0:62d1edcc13d1	1574	}
mluis	0:62d1edcc13d1	1575	os_wlsbf2(LMIC.frame+OFF_DAT_SEQNO, LMIC.seqnoUp-1);
mluis	0:62d1edcc13d1	1576
mluis	0:62d1edcc13d1	1577	// Clear pending DN confirmation
mluis	0:62d1edcc13d1	1578	LMIC.dnConf = 0;
mluis	0:62d1edcc13d1	1579
mluis	0:62d1edcc13d1	1580	if( txdata ) {
mluis	1:d3b7bde3995c	1581	if( LMIC.pendTxConf ) {
mluis	1:d3b7bde3995c	1582	// Confirmed only makes sense if we have a payload (or at least a port)
mluis	1:d3b7bde3995c	1583	LMIC.frame[OFF_DAT_HDR] = HDR_FTYPE_DCUP \| HDR_MAJOR_V1;
mluis	1:d3b7bde3995c	1584	if( LMIC.txCnt == 0 ) LMIC.txCnt = 1;
mluis	1:d3b7bde3995c	1585	}
mluis	1:d3b7bde3995c	1586	LMIC.frame[end] = LMIC.pendTxPort;
mluis	1:d3b7bde3995c	1587	os_copyMem(LMIC.frame+end+1, LMIC.pendTxData, dlen);
mluis	1:d3b7bde3995c	1588	aes_cipher(LMIC.pendTxPort==0 ? LMIC.nwkKey : LMIC.artKey,
mluis	1:d3b7bde3995c	1589	LMIC.devaddr, LMIC.seqnoUp-1,
mluis	1:d3b7bde3995c	1590	/up/0, LMIC.frame+end+1, dlen);
mluis	0:62d1edcc13d1	1591	}
mluis	0:62d1edcc13d1	1592	aes_appendMic(LMIC.nwkKey, LMIC.devaddr, LMIC.seqnoUp-1, /up/0, LMIC.frame, flen-4);
mluis	0:62d1edcc13d1	1593
mluis	0:62d1edcc13d1	1594	EV(dfinfo, DEBUG, (e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1595	e_.devaddr = LMIC.devaddr,
mluis	1:d3b7bde3995c	1596	e_.seqno = LMIC.seqnoUp-1,
mluis	1:d3b7bde3995c	1597	e_.flags = (LMIC.pendTxPort < 0 ? EV::dfinfo_t::NOPORT : EV::dfinfo_t::NOP),
mluis	1:d3b7bde3995c	1598	e_.mic = Base::lsbf4(&LMIC.frame[flen-4]),
mluis	1:d3b7bde3995c	1599	e_.hdr = LMIC.frame[LORA::OFF_DAT_HDR],
mluis	1:d3b7bde3995c	1600	e_.fct = LMIC.frame[LORA::OFF_DAT_FCT],
mluis	1:d3b7bde3995c	1601	e_.port = LMIC.pendTxPort,
mluis	1:d3b7bde3995c	1602	e_.plen = txdata ? dlen : 0,
mluis	1:d3b7bde3995c	1603	e_.opts.length = end-LORA::OFF_DAT_OPTS,
mluis	1:d3b7bde3995c	1604	memcpy(&e_.opts[0], LMIC.frame+LORA::OFF_DAT_OPTS, end-LORA::OFF_DAT_OPTS)));
mluis	0:62d1edcc13d1	1605	LMIC.dataLen = flen;
mluis	0:62d1edcc13d1	1606	}
mluis	0:62d1edcc13d1	1607
mluis	0:62d1edcc13d1	1608
mluis	0:62d1edcc13d1	1609	// Callback from HAL during scan mode or when job timer expires.
mluis	0:62d1edcc13d1	1610	static void onBcnRx (xref2osjob_t job) {
mluis	0:62d1edcc13d1	1611	// If we arrive via job timer make sure to put radio to rest.
mluis	0:62d1edcc13d1	1612	os_radio(RADIO_RST);
mluis	0:62d1edcc13d1	1613	os_clearCallback(&LMIC.osjob);
mluis	0:62d1edcc13d1	1614	if( LMIC.dataLen == 0 ) {
mluis	1:d3b7bde3995c	1615	// Nothing received - timeout
mluis	1:d3b7bde3995c	1616	LMIC.opmode &= ~(OP_SCAN \| OP_TRACK);
mluis	1:d3b7bde3995c	1617	reportEvent(EV_SCAN_TIMEOUT);
mluis	1:d3b7bde3995c	1618	return;
mluis	0:62d1edcc13d1	1619	}
mluis	0:62d1edcc13d1	1620	if( decodeBeacon() <= 0 ) {
mluis	1:d3b7bde3995c	1621	// Something is wrong with the beacon - continue scan
mluis	1:d3b7bde3995c	1622	LMIC.dataLen = 0;
mluis	1:d3b7bde3995c	1623	os_radio(RADIO_RXON);
mluis	1:d3b7bde3995c	1624	os_setTimedCallback(&LMIC.osjob, LMIC.bcninfo.txtime, FUNC_ADDR(onBcnRx));
mluis	1:d3b7bde3995c	1625	return;
mluis	0:62d1edcc13d1	1626	}
mluis	0:62d1edcc13d1	1627	// Found our 1st beacon
mluis	0:62d1edcc13d1	1628	// We don't have a previous beacon to calc some drift - assume
mluis	0:62d1edcc13d1	1629	// an max error of 13ms = 128sec*100ppm which is roughly +/-100ppm
mluis	0:62d1edcc13d1	1630	calcBcnRxWindowFromMillis(13,1);
mluis	0:62d1edcc13d1	1631	LMIC.opmode &= ~OP_SCAN; // turn SCAN off
mluis	0:62d1edcc13d1	1632	LMIC.opmode \|= OP_TRACK; // auto enable tracking
mluis	0:62d1edcc13d1	1633	reportEvent(EV_BEACON_FOUND); // can be disabled in callback
mluis	0:62d1edcc13d1	1634	}
mluis	0:62d1edcc13d1	1635
mluis	0:62d1edcc13d1	1636
mluis	0:62d1edcc13d1	1637	// Enable receiver to listen to incoming beacons
mluis	0:62d1edcc13d1	1638	// netid defines when scan stops (any or specific beacon)
mluis	0:62d1edcc13d1	1639	// This mode ends with events: EV_SCAN_TIMEOUT/EV_SCAN_BEACON
mluis	0:62d1edcc13d1	1640	// Implicitely cancels any pending TX/RX transaction.
mluis	0:62d1edcc13d1	1641	// Also cancels an onpoing joining procedure.
mluis	0:62d1edcc13d1	1642	static void startScan (void) {
mluis	0:62d1edcc13d1	1643	ASSERT(LMIC.devaddr!=0 && (LMIC.opmode & OP_JOINING)==0);
mluis	0:62d1edcc13d1	1644	if( (LMIC.opmode & OP_SHUTDOWN) != 0 )
mluis	1:d3b7bde3995c	1645	return;
mluis	0:62d1edcc13d1	1646	// Cancel onging TX/RX transaction
mluis	0:62d1edcc13d1	1647	LMIC.txCnt = LMIC.dnConf = LMIC.bcninfo.flags = 0;
mluis	0:62d1edcc13d1	1648	LMIC.opmode = (LMIC.opmode \| OP_SCAN) & ~(OP_TXRXPEND);
mluis	0:62d1edcc13d1	1649	setBcnRxParams();
mluis	0:62d1edcc13d1	1650	LMIC.rxtime = LMIC.bcninfo.txtime = os_getTime() + sec2osticks(BCN_INTV_sec+1);
mluis	0:62d1edcc13d1	1651	os_setTimedCallback(&LMIC.osjob, LMIC.rxtime, FUNC_ADDR(onBcnRx));
mluis	0:62d1edcc13d1	1652	os_radio(RADIO_RXON);
mluis	0:62d1edcc13d1	1653	}
mluis	0:62d1edcc13d1	1654
mluis	0:62d1edcc13d1	1655
mluis	0:62d1edcc13d1	1656	bit_t LMIC_enableTracking (u1_t tryBcnInfo) {
mluis	0:62d1edcc13d1	1657	if( (LMIC.opmode & (OP_SCAN\|OP_TRACK\|OP_SHUTDOWN)) != 0 )
mluis	1:d3b7bde3995c	1658	return 0; // already in progress or failed to enable
mluis	0:62d1edcc13d1	1659	// If BCN info requested from NWK then app has to take are
mluis	0:62d1edcc13d1	1660	// of sending data up so that MCMD_BCNI_REQ can be attached.
mluis	0:62d1edcc13d1	1661	if( (LMIC.bcninfoTries = tryBcnInfo) == 0 )
mluis	1:d3b7bde3995c	1662	startScan();
mluis	0:62d1edcc13d1	1663	return 1; // enabled
mluis	0:62d1edcc13d1	1664	}
mluis	0:62d1edcc13d1	1665
mluis	0:62d1edcc13d1	1666
mluis	0:62d1edcc13d1	1667	void LMIC_disableTracking (void) {
mluis	0:62d1edcc13d1	1668	LMIC.opmode &= ~(OP_SCAN\|OP_TRACK);
mluis	0:62d1edcc13d1	1669	LMIC.bcninfoTries = 0;
mluis	0:62d1edcc13d1	1670	engineUpdate();
mluis	0:62d1edcc13d1	1671	}
mluis	0:62d1edcc13d1	1672
mluis	0:62d1edcc13d1	1673
mluis	0:62d1edcc13d1	1674	// ================================================================================
mluis	0:62d1edcc13d1	1675	//
mluis	0:62d1edcc13d1	1676	// Join stuff
mluis	0:62d1edcc13d1	1677	//
mluis	0:62d1edcc13d1	1678	// ================================================================================
mluis	0:62d1edcc13d1	1679
mluis	0:62d1edcc13d1	1680	static void buildJoinRequest (u1_t ftype) {
mluis	0:62d1edcc13d1	1681	// Do not use pendTxData since we might have a pending
mluis	0:62d1edcc13d1	1682	// user level frame in there. Use RX holding area instead.
mluis	0:62d1edcc13d1	1683	xref2u1_t d = LMIC.frame;
mluis	0:62d1edcc13d1	1684	d[OFF_JR_HDR] = ftype;
mluis	0:62d1edcc13d1	1685	os_getArtEui(d + OFF_JR_ARTEUI);
mluis	0:62d1edcc13d1	1686	os_getDevEui(d + OFF_JR_DEVEUI);
mluis	0:62d1edcc13d1	1687	os_wlsbf2(d + OFF_JR_DEVNONCE, LMIC.devNonce);
mluis	0:62d1edcc13d1	1688	aes_appendMic0(d, OFF_JR_MIC);
mluis	0:62d1edcc13d1	1689
mluis	0:62d1edcc13d1	1690	EV(joininfo,INFO,(e_.deveui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1691	e_.arteui = MAIN::CDEV->getArtEui(),
mluis	1:d3b7bde3995c	1692	e_.nonce = LMIC.devNonce,
mluis	1:d3b7bde3995c	1693	e_.oldaddr = LMIC.devaddr,
mluis	1:d3b7bde3995c	1694	e_.mic = Base::lsbf4(&d[LORA::OFF_JR_MIC]),
mluis	1:d3b7bde3995c	1695	e_.reason = ((LMIC.opmode & OP_REJOIN) != 0
mluis	1:d3b7bde3995c	1696	? EV::joininfo_t::REJOIN_REQUEST
mluis	1:d3b7bde3995c	1697	: EV::joininfo_t::REQUEST)));
mluis	0:62d1edcc13d1	1698	LMIC.dataLen = LEN_JR;
mluis	0:62d1edcc13d1	1699	LMIC.devNonce++;
mluis	1:d3b7bde3995c	1700	DO_DEVDB(LMIC.devNonce,devNonce);
mluis	0:62d1edcc13d1	1701	}
mluis	0:62d1edcc13d1	1702
mluis	0:62d1edcc13d1	1703	static void startJoining (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1704	reportEvent(EV_JOINING);
mluis	0:62d1edcc13d1	1705	}
mluis	0:62d1edcc13d1	1706
mluis	0:62d1edcc13d1	1707	// Start join procedure if not already joined.
mluis	0:62d1edcc13d1	1708	bit_t LMIC_startJoining (void) {
mluis	0:62d1edcc13d1	1709	if( LMIC.devaddr == 0 ) {
mluis	1:d3b7bde3995c	1710	// There should be no TX/RX going on
mluis	1:d3b7bde3995c	1711	ASSERT((LMIC.opmode & (OP_POLL\|OP_TXRXPEND)) == 0);
mluis	1:d3b7bde3995c	1712	// Lift any previous duty limitation
mluis	1:d3b7bde3995c	1713	LMIC.globalDutyRate = 0;
mluis	1:d3b7bde3995c	1714	// Cancel scanning
mluis	1:d3b7bde3995c	1715	LMIC.opmode &= ~(OP_SCAN\|OP_REJOIN\|OP_LINKDEAD\|OP_NEXTCHNL);
mluis	1:d3b7bde3995c	1716	// Setup state
mluis	1:d3b7bde3995c	1717	LMIC.rejoinCnt = LMIC.txCnt = LMIC.pendTxConf = 0;
mluis	1:d3b7bde3995c	1718	initJoinLoop();
mluis	1:d3b7bde3995c	1719	LMIC.opmode \|= OP_JOINING;
mluis	1:d3b7bde3995c	1720	// reportEvent will call engineUpdate which then starts sending JOIN REQUESTS
mluis	1:d3b7bde3995c	1721	os_setCallback(&LMIC.osjob, FUNC_ADDR(startJoining));
mluis	1:d3b7bde3995c	1722	return 1;
mluis	0:62d1edcc13d1	1723	}
mluis	1:d3b7bde3995c	1724	return 0; // already joined
mluis	0:62d1edcc13d1	1725	}
mluis	0:62d1edcc13d1	1726
mluis	0:62d1edcc13d1	1727
mluis	0:62d1edcc13d1	1728	// ================================================================================
mluis	0:62d1edcc13d1	1729	//
mluis	0:62d1edcc13d1	1730	//
mluis	0:62d1edcc13d1	1731	//
mluis	0:62d1edcc13d1	1732	// ================================================================================
mluis	0:62d1edcc13d1	1733
mluis	0:62d1edcc13d1	1734	static void processPingRx (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1735	if( LMIC.dataLen != 0 ) {
mluis	1:d3b7bde3995c	1736	LMIC.txrxFlags = TXRX_PING;
mluis	1:d3b7bde3995c	1737	if( decodeFrame() ) {
mluis	1:d3b7bde3995c	1738	reportEvent(EV_RXCOMPLETE);
mluis	1:d3b7bde3995c	1739	return;
mluis	1:d3b7bde3995c	1740	}
mluis	0:62d1edcc13d1	1741	}
mluis	0:62d1edcc13d1	1742	// Pick next ping slot
mluis	0:62d1edcc13d1	1743	engineUpdate();
mluis	0:62d1edcc13d1	1744	}
mluis	0:62d1edcc13d1	1745
mluis	0:62d1edcc13d1	1746
mluis	0:62d1edcc13d1	1747	static bit_t processDnData (void) {
mluis	0:62d1edcc13d1	1748	ASSERT((LMIC.opmode & OP_TXRXPEND)!=0);
mluis	0:62d1edcc13d1	1749
mluis	0:62d1edcc13d1	1750	if( LMIC.dataLen == 0 ) {
mluis	0:62d1edcc13d1	1751	norx:
mluis	1:d3b7bde3995c	1752	if( LMIC.txCnt != 0 ) {
mluis	1:d3b7bde3995c	1753	if( LMIC.txCnt < TXCONF_ATTEMPTS ) {
mluis	1:d3b7bde3995c	1754	LMIC.txCnt += 1;
mluis	1:d3b7bde3995c	1755	setDrTxpow(DRCHG_NOACK, lowerDR(LMIC.datarate, DRADJUST[LMIC.txCnt]), KEEP_TXPOW);
mluis	1:d3b7bde3995c	1756	// Schedule another retransmission
mluis	1:d3b7bde3995c	1757	txDelay(LMIC.rxtime, RETRY_PERIOD_secs);
mluis	1:d3b7bde3995c	1758	LMIC.opmode &= ~OP_TXRXPEND;
mluis	1:d3b7bde3995c	1759	engineUpdate();
mluis	1:d3b7bde3995c	1760	return 1;
mluis	1:d3b7bde3995c	1761	}
mluis	1:d3b7bde3995c	1762	LMIC.txrxFlags = TXRX_NACK \| TXRX_NOPORT;
mluis	1:d3b7bde3995c	1763	} else {
mluis	1:d3b7bde3995c	1764	// Nothing received - implies no port
mluis	1:d3b7bde3995c	1765	LMIC.txrxFlags = TXRX_NOPORT;
mluis	0:62d1edcc13d1	1766	}
mluis	1:d3b7bde3995c	1767	if( LMIC.adrAckReq != LINK_CHECK_OFF )
mluis	1:d3b7bde3995c	1768	LMIC.adrAckReq += 1;
mluis	1:d3b7bde3995c	1769	LMIC.dataBeg = LMIC.dataLen = 0;
mluis	0:62d1edcc13d1	1770	txcomplete:
mluis	1:d3b7bde3995c	1771	LMIC.opmode &= ~(OP_TXDATA\|OP_TXRXPEND);
mluis	1:d3b7bde3995c	1772	if( (LMIC.txrxFlags & (TXRX_DNW1\|TXRX_DNW2\|TXRX_PING)) != 0 && (LMIC.opmode & OP_LINKDEAD) != 0 ) {
mluis	1:d3b7bde3995c	1773	LMIC.opmode &= ~OP_LINKDEAD;
mluis	1:d3b7bde3995c	1774	reportEvent(EV_LINK_ALIVE);
mluis	1:d3b7bde3995c	1775	}
mluis	1:d3b7bde3995c	1776	reportEvent(EV_TXCOMPLETE);
mluis	1:d3b7bde3995c	1777	// If we haven't heard from NWK in a while although we asked for a sign
mluis	1:d3b7bde3995c	1778	// assume link is dead - notify application and keep going
mluis	1:d3b7bde3995c	1779	if( LMIC.adrAckReq > LINK_CHECK_DEAD ) {
mluis	1:d3b7bde3995c	1780	// We haven't heard from NWK for some time although we
mluis	1:d3b7bde3995c	1781	// asked for a response for some time - assume we're disconnected. Lower DR one notch.
mluis	1:d3b7bde3995c	1782	EV(devCond, ERR, (e_.reason = EV::devCond_t::LINK_DEAD,
mluis	1:d3b7bde3995c	1783	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1784	e_.info = LMIC.adrAckReq));
mluis	1:d3b7bde3995c	1785	setDrTxpow(DRCHG_NOADRACK, decDR((dr_t)LMIC.datarate), KEEP_TXPOW);
mluis	1:d3b7bde3995c	1786	LMIC.adrAckReq = LINK_CHECK_CONT;
mluis	0:62d1edcc13d1	1787	LMIC.opmode \|= OP_REJOIN\|OP_LINKDEAD;
mluis	1:d3b7bde3995c	1788	reportEvent(EV_LINK_DEAD);
mluis	0:62d1edcc13d1	1789	}
mluis	1:d3b7bde3995c	1790	// If this falls to zero the NWK did not answer our MCMD_BCNI_REQ commands - try full scan
mluis	1:d3b7bde3995c	1791	if( LMIC.bcninfoTries > 0 ) {
mluis	1:d3b7bde3995c	1792	if( (LMIC.opmode & OP_TRACK) != 0 ) {
mluis	1:d3b7bde3995c	1793	reportEvent(EV_BEACON_FOUND);
mluis	1:d3b7bde3995c	1794	LMIC.bcninfoTries = 0;
mluis	1:d3b7bde3995c	1795	}
mluis	1:d3b7bde3995c	1796	else if( --LMIC.bcninfoTries == 0 ) {
mluis	1:d3b7bde3995c	1797	startScan(); // NWK did not answer - try scan
mluis	1:d3b7bde3995c	1798	}
mluis	0:62d1edcc13d1	1799	}
mluis	1:d3b7bde3995c	1800	return 1;
mluis	0:62d1edcc13d1	1801	}
mluis	0:62d1edcc13d1	1802	if( !decodeFrame() ) {
mluis	1:d3b7bde3995c	1803	if( (LMIC.txrxFlags & TXRX_DNW1) != 0 )
mluis	1:d3b7bde3995c	1804	return 0;
mluis	1:d3b7bde3995c	1805	goto norx;
mluis	0:62d1edcc13d1	1806	}
mluis	0:62d1edcc13d1	1807	goto txcomplete;
mluis	0:62d1edcc13d1	1808	}
mluis	0:62d1edcc13d1	1809
mluis	0:62d1edcc13d1	1810
mluis	0:62d1edcc13d1	1811	static void processBeacon (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1812	ostime_t lasttx = LMIC.bcninfo.txtime; // save here - decodeBeacon might overwrite
mluis	0:62d1edcc13d1	1813	u1_t flags = LMIC.bcninfo.flags;
mluis	0:62d1edcc13d1	1814	ev_t ev;
mluis	0:62d1edcc13d1	1815
mluis	0:62d1edcc13d1	1816	if( LMIC.dataLen != 0 && decodeBeacon() >= 1 ) {
mluis	1:d3b7bde3995c	1817	ev = EV_BEACON_TRACKED;
mluis	1:d3b7bde3995c	1818	if( (flags & (BCN_PARTIAL\|BCN_FULL)) == 0 ) {
mluis	1:d3b7bde3995c	1819	// We don't have a previous beacon to calc some drift - assume
mluis	1:d3b7bde3995c	1820	// an max error of 13ms = 128sec*100ppm which is roughly +/-100ppm
mluis	1:d3b7bde3995c	1821	calcBcnRxWindowFromMillis(13,0);
mluis	1:d3b7bde3995c	1822	goto rev;
mluis	1:d3b7bde3995c	1823	}
mluis	1:d3b7bde3995c	1824	// We have a previous BEACON to calculate some drift
mluis	1:d3b7bde3995c	1825	s2_t drift = BCN_INTV_osticks - (LMIC.bcninfo.txtime - lasttx);
mluis	1:d3b7bde3995c	1826	if( LMIC.missedBcns > 0 ) {
mluis	1:d3b7bde3995c	1827	drift = LMIC.drift + (drift - LMIC.drift) / (LMIC.missedBcns+1);
mluis	1:d3b7bde3995c	1828	}
mluis	1:d3b7bde3995c	1829	if( (LMIC.bcninfo.flags & BCN_NODRIFT) == 0 ) {
mluis	1:d3b7bde3995c	1830	s2_t diff = LMIC.drift - drift;
mluis	1:d3b7bde3995c	1831	if( diff < 0 ) diff = -diff;
mluis	1:d3b7bde3995c	1832	LMIC.lastDriftDiff = diff;
mluis	1:d3b7bde3995c	1833	if( LMIC.maxDriftDiff < diff )
mluis	1:d3b7bde3995c	1834	LMIC.maxDriftDiff = diff;
mluis	1:d3b7bde3995c	1835	LMIC.bcninfo.flags &= ~BCN_NODDIFF;
mluis	1:d3b7bde3995c	1836	}
mluis	1:d3b7bde3995c	1837	LMIC.drift = drift;
mluis	1:d3b7bde3995c	1838	LMIC.missedBcns = LMIC.rejoinCnt = 0;
mluis	1:d3b7bde3995c	1839	LMIC.bcninfo.flags &= ~BCN_NODRIFT;
mluis	1:d3b7bde3995c	1840	EV(devCond,INFO,(e_.reason = EV::devCond_t::CLOCK_DRIFT,
mluis	1:d3b7bde3995c	1841	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1842	e_.info = drift,
mluis	1:d3b7bde3995c	1843	e_.info2 = /occasion BEACON/0));
mluis	1:d3b7bde3995c	1844	ASSERT((LMIC.bcninfo.flags & (BCN_PARTIAL\|BCN_FULL)) != 0);
mluis	0:62d1edcc13d1	1845	} else {
mluis	1:d3b7bde3995c	1846	ev = EV_BEACON_MISSED;
mluis	1:d3b7bde3995c	1847	LMIC.bcninfo.txtime += BCN_INTV_osticks - LMIC.drift;
mluis	1:d3b7bde3995c	1848	LMIC.bcninfo.time += BCN_INTV_sec;
mluis	1:d3b7bde3995c	1849	LMIC.missedBcns++;
mluis	1:d3b7bde3995c	1850	// Delay any possible TX after surmised beacon - it's there although we missed it
mluis	1:d3b7bde3995c	1851	txDelay(LMIC.bcninfo.txtime + BCN_RESERVE_osticks, 4);
mluis	1:d3b7bde3995c	1852	if( LMIC.missedBcns > MAX_MISSED_BCNS )
mluis	1:d3b7bde3995c	1853	LMIC.opmode \|= OP_REJOIN; // try if we can roam to another network
mluis	1:d3b7bde3995c	1854	if( LMIC.bcnRxsyms > MAX_RXSYMS ) {
mluis	1:d3b7bde3995c	1855	LMIC.opmode &= ~(OP_TRACK\|OP_PINGABLE\|OP_PINGINI\|OP_REJOIN);
mluis	1:d3b7bde3995c	1856	reportEvent(EV_LOST_TSYNC);
mluis	1:d3b7bde3995c	1857	return;
mluis	1:d3b7bde3995c	1858	}
mluis	0:62d1edcc13d1	1859	}
mluis	0:62d1edcc13d1	1860	LMIC.bcnRxtime = LMIC.bcninfo.txtime + BCN_INTV_osticks - calcRxWindow(0,DR_BCN);
mluis	0:62d1edcc13d1	1861	LMIC.bcnRxsyms = LMIC.rxsyms;
mluis	0:62d1edcc13d1	1862	rev:
mluis	1:d3b7bde3995c	1863	#if CFG_us915
mluis	1:d3b7bde3995c	1864	LMIC.bcnChnl = (LMIC.bcnChnl+1) & 7;
mluis	1:d3b7bde3995c	1865	#endif
mluis	0:62d1edcc13d1	1866	if( (LMIC.opmode & OP_PINGINI) != 0 )
mluis	1:d3b7bde3995c	1867	rxschedInit(&LMIC.ping); // note: reuses LMIC.frame buffer!
mluis	0:62d1edcc13d1	1868	reportEvent(ev);
mluis	0:62d1edcc13d1	1869	}
mluis	0:62d1edcc13d1	1870
mluis	0:62d1edcc13d1	1871
mluis	0:62d1edcc13d1	1872	static void startRxBcn (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1873	LMIC.osjob.func = FUNC_ADDR(processBeacon);
mluis	0:62d1edcc13d1	1874	os_radio(RADIO_RX);
mluis	0:62d1edcc13d1	1875	}
mluis	0:62d1edcc13d1	1876
mluis	0:62d1edcc13d1	1877
mluis	0:62d1edcc13d1	1878	static void startRxPing (xref2osjob_t osjob) {
mluis	0:62d1edcc13d1	1879	LMIC.osjob.func = FUNC_ADDR(processPingRx);
mluis	0:62d1edcc13d1	1880	os_radio(RADIO_RX);
mluis	0:62d1edcc13d1	1881	}
mluis	0:62d1edcc13d1	1882
mluis	0:62d1edcc13d1	1883
mluis	0:62d1edcc13d1	1884	// Decide what to do next for the MAC layer of a device
mluis	0:62d1edcc13d1	1885	static void engineUpdate (void) {
mluis	0:62d1edcc13d1	1886	// Check for ongoing state: scan or TX/RX transaction
mluis	0:62d1edcc13d1	1887	if( (LMIC.opmode & (OP_SCAN\|OP_TXRXPEND\|OP_SHUTDOWN)) != 0 )
mluis	1:d3b7bde3995c	1888	return;
mluis	0:62d1edcc13d1	1889
mluis	0:62d1edcc13d1	1890	if( LMIC.devaddr == 0 && (LMIC.opmode & OP_JOINING) == 0 ) {
mluis	1:d3b7bde3995c	1891	LMIC_startJoining();
mluis	1:d3b7bde3995c	1892	return;
mluis	0:62d1edcc13d1	1893	}
mluis	0:62d1edcc13d1	1894
mluis	0:62d1edcc13d1	1895	ostime_t now = os_getTime();
mluis	0:62d1edcc13d1	1896	ostime_t rxtime = 0;
mluis	0:62d1edcc13d1	1897	ostime_t txbeg = 0;
mluis	0:62d1edcc13d1	1898
mluis	0:62d1edcc13d1	1899	if( (LMIC.opmode & OP_TRACK) != 0 ) {
mluis	1:d3b7bde3995c	1900	// We are tracking a beacon
mluis	1:d3b7bde3995c	1901	ASSERT( now + RX_RAMPUP - LMIC.bcnRxtime <= 0 );
mluis	1:d3b7bde3995c	1902	rxtime = LMIC.bcnRxtime - RX_RAMPUP;
mluis	0:62d1edcc13d1	1903	}
mluis	0:62d1edcc13d1	1904
mluis	0:62d1edcc13d1	1905	if( (LMIC.opmode & (OP_JOINING\|OP_REJOIN\|OP_TXDATA\|OP_POLL)) != 0 ) {
mluis	1:d3b7bde3995c	1906	// Need to TX some data...
mluis	1:d3b7bde3995c	1907	// Assuming txChnl points to channel which first becomes available again.
mluis	1:d3b7bde3995c	1908	bit_t jacc = ((LMIC.opmode & (OP_JOINING\|OP_REJOIN)) != 0 ? 1 : 0);
mluis	1:d3b7bde3995c	1909	// Find next suitable channel and return availability time
mluis	1:d3b7bde3995c	1910	if( (LMIC.opmode & OP_NEXTCHNL) != 0 ) {
mluis	1:d3b7bde3995c	1911	txbeg = LMIC.txend = nextTx(now);
mluis	1:d3b7bde3995c	1912	LMIC.opmode &= ~OP_NEXTCHNL;
mluis	0:62d1edcc13d1	1913	} else {
mluis	1:d3b7bde3995c	1914	txbeg = LMIC.txend;
mluis	1:d3b7bde3995c	1915	}
mluis	1:d3b7bde3995c	1916	// Delayed TX or waiting for duty cycle?
mluis	1:d3b7bde3995c	1917	if( (LMIC.globalDutyRate != 0 \|\| (LMIC.opmode & OP_RNDTX) != 0) && (txbeg - LMIC.globalDutyAvail) < 0 )
mluis	1:d3b7bde3995c	1918	txbeg = LMIC.globalDutyAvail;
mluis	1:d3b7bde3995c	1919	// If we're tracking a beacon...
mluis	1:d3b7bde3995c	1920	// then make sure TX-RX transaction is complete before beacon
mluis	1:d3b7bde3995c	1921	if( (LMIC.opmode & OP_TRACK) != 0 &&
mluis	1:d3b7bde3995c	1922	txbeg + (jacc ? JOIN_GUARD_osticks : TXRX_GUARD_osticks) - rxtime > 0 ) {
mluis	1:d3b7bde3995c	1923	// Not enough time to complete TX-RX before beacon - postpone after beacon.
mluis	1:d3b7bde3995c	1924	// In order to avoid clustering of postponed TX right after beacon randomize start!
mluis	1:d3b7bde3995c	1925	txDelay(rxtime + BCN_RESERVE_osticks, 16);
mluis	1:d3b7bde3995c	1926	txbeg = 0;
mluis	1:d3b7bde3995c	1927	goto checkrx;
mluis	0:62d1edcc13d1	1928	}
mluis	1:d3b7bde3995c	1929	// Earliest possible time vs overhead to setup radio
mluis	1:d3b7bde3995c	1930	if( txbeg - (now + TX_RAMPUP) < 0 ) {
mluis	1:d3b7bde3995c	1931	// We could send right now!
mluis	1:d3b7bde3995c	1932	dr_t txdr = (dr_t)LMIC.datarate;
mluis	1:d3b7bde3995c	1933	if( jacc ) {
mluis	1:d3b7bde3995c	1934	u1_t ftype;
mluis	1:d3b7bde3995c	1935	if( (LMIC.opmode & OP_REJOIN) != 0 ) {
mluis	1:d3b7bde3995c	1936	txdr = lowerDR(txdr, LMIC.rejoinCnt);
mluis	1:d3b7bde3995c	1937	ftype = HDR_FTYPE_REJOIN;
mluis	1:d3b7bde3995c	1938	} else {
mluis	1:d3b7bde3995c	1939	ftype = HDR_FTYPE_JREQ;
mluis	1:d3b7bde3995c	1940	}
mluis	1:d3b7bde3995c	1941	buildJoinRequest(ftype);
mluis	1:d3b7bde3995c	1942	LMIC.osjob.func = FUNC_ADDR(jreqDone);
mluis	1:d3b7bde3995c	1943	} else {
mluis	1:d3b7bde3995c	1944	if( LMIC.seqnoDn >= 0xFFFFFF80 ) {
mluis	1:d3b7bde3995c	1945	// Imminent roll over - proactively reset MAC
mluis	1:d3b7bde3995c	1946	EV(specCond, INFO, (e_.reason = EV::specCond_t::DNSEQNO_ROLL_OVER,
mluis	1:d3b7bde3995c	1947	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1948	e_.info = LMIC.seqnoDn,
mluis	1:d3b7bde3995c	1949	e_.info2 = 0));
mluis	1:d3b7bde3995c	1950	// Device has to react! NWK will not roll over and just stop sending.
mluis	1:d3b7bde3995c	1951	// Thus, we have N frames to detect a possible lock up.
mluis	1:d3b7bde3995c	1952	reset:
mluis	1:d3b7bde3995c	1953	os_setCallback(&LMIC.osjob, FUNC_ADDR(runReset));
mluis	1:d3b7bde3995c	1954	return;
mluis	1:d3b7bde3995c	1955	}
mluis	1:d3b7bde3995c	1956	if( (LMIC.txCnt==0 && LMIC.seqnoUp == 0xFFFFFFFF) ) {
mluis	1:d3b7bde3995c	1957	// Roll over of up seq counter
mluis	1:d3b7bde3995c	1958	EV(specCond, ERR, (e_.reason = EV::specCond_t::UPSEQNO_ROLL_OVER,
mluis	1:d3b7bde3995c	1959	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	1960	e_.info2 = LMIC.seqnoUp));
mluis	1:d3b7bde3995c	1961	// Do not run RESET event callback from here!
mluis	1:d3b7bde3995c	1962	// App code might do some stuff after send unaware of RESET.
mluis	1:d3b7bde3995c	1963	goto reset;
mluis	1:d3b7bde3995c	1964	}
mluis	1:d3b7bde3995c	1965	buildDataFrame();
mluis	1:d3b7bde3995c	1966	LMIC.osjob.func = FUNC_ADDR(updataDone);
mluis	1:d3b7bde3995c	1967	}
mluis	1:d3b7bde3995c	1968	LMIC.rps = setCr(updr2rps(txdr), (cr_t)LMIC.errcr);
mluis	1:d3b7bde3995c	1969	LMIC.dndr = txdr; // carry TX datarate (can be != LMIC.datarate) over to txDone/setupRx1
mluis	1:d3b7bde3995c	1970	LMIC.opmode = (LMIC.opmode & ~(OP_POLL\|OP_RNDTX)) \| OP_TXRXPEND \| OP_NEXTCHNL;
mluis	1:d3b7bde3995c	1971	updateTx(txbeg);
mluis	1:d3b7bde3995c	1972	os_radio(RADIO_TX);
mluis	0:62d1edcc13d1	1973	return;
mluis	0:62d1edcc13d1	1974	}
mluis	1:d3b7bde3995c	1975	// Cannot yet TX
mluis	1:d3b7bde3995c	1976	if( (LMIC.opmode & OP_TRACK) == 0 )
mluis	1:d3b7bde3995c	1977	goto txdelay; // We don't track the beacon - nothing else to do - so wait for the time to TX
mluis	1:d3b7bde3995c	1978	// Consider RX tasks
mluis	1:d3b7bde3995c	1979	if( txbeg == 0 ) // zero indicates no TX pending
mluis	1:d3b7bde3995c	1980	txbeg += 1; // TX delayed by one tick (insignificant amount of time)
mluis	0:62d1edcc13d1	1981	} else {
mluis	1:d3b7bde3995c	1982	// No TX pending - no scheduled RX
mluis	1:d3b7bde3995c	1983	if( (LMIC.opmode & OP_TRACK) == 0 )
mluis	1:d3b7bde3995c	1984	return;
mluis	0:62d1edcc13d1	1985	}
mluis	0:62d1edcc13d1	1986
mluis	0:62d1edcc13d1	1987	// Are we pingable?
mluis	0:62d1edcc13d1	1988	checkrx:
mluis	0:62d1edcc13d1	1989	if( (LMIC.opmode & OP_PINGINI) != 0 ) {
mluis	1:d3b7bde3995c	1990	// One more RX slot in this beacon period?
mluis	1:d3b7bde3995c	1991	if( rxschedNext(&LMIC.ping, now+RX_RAMPUP) ) {
mluis	1:d3b7bde3995c	1992	if( txbeg != 0 && (txbeg - LMIC.ping.rxtime) < 0 )
mluis	1:d3b7bde3995c	1993	goto txdelay;
mluis	1:d3b7bde3995c	1994	LMIC.rxsyms = LMIC.ping.rxsyms;
mluis	1:d3b7bde3995c	1995	LMIC.rxtime = LMIC.ping.rxtime;
mluis	1:d3b7bde3995c	1996	LMIC.freq = LMIC.ping.freq;
mluis	1:d3b7bde3995c	1997	LMIC.rps = dndr2rps(LMIC.ping.dr);
mluis	1:d3b7bde3995c	1998	LMIC.dataLen = 0;
mluis	1:d3b7bde3995c	1999	ASSERT(LMIC.rxtime - now+RX_RAMPUP >= 0 );
mluis	1:d3b7bde3995c	2000	os_setTimedCallback(&LMIC.osjob, LMIC.rxtime - RX_RAMPUP, FUNC_ADDR(startRxPing));
mluis	1:d3b7bde3995c	2001	return;
mluis	1:d3b7bde3995c	2002	}
mluis	1:d3b7bde3995c	2003	// no - just wait for the beacon
mluis	0:62d1edcc13d1	2004	}
mluis	0:62d1edcc13d1	2005
mluis	0:62d1edcc13d1	2006	if( txbeg != 0 && (txbeg - rxtime) < 0 )
mluis	1:d3b7bde3995c	2007	goto txdelay;
mluis	0:62d1edcc13d1	2008
mluis	0:62d1edcc13d1	2009	setBcnRxParams();
mluis	0:62d1edcc13d1	2010	LMIC.rxsyms = LMIC.bcnRxsyms;
mluis	0:62d1edcc13d1	2011	LMIC.rxtime = LMIC.bcnRxtime;
mluis	0:62d1edcc13d1	2012	if( now - rxtime >= 0 ) {
mluis	1:d3b7bde3995c	2013	LMIC.osjob.func = FUNC_ADDR(processBeacon);
mluis	1:d3b7bde3995c	2014	os_radio(RADIO_RX);
mluis	1:d3b7bde3995c	2015	return;
mluis	0:62d1edcc13d1	2016	}
mluis	0:62d1edcc13d1	2017	os_setTimedCallback(&LMIC.osjob, rxtime, FUNC_ADDR(startRxBcn));
mluis	0:62d1edcc13d1	2018	return;
mluis	0:62d1edcc13d1	2019
mluis	0:62d1edcc13d1	2020	txdelay:
mluis	0:62d1edcc13d1	2021	EV(devCond, INFO, (e_.reason = EV::devCond_t::TX_DELAY,
mluis	1:d3b7bde3995c	2022	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	2023	e_.info = osticks2ms(txbeg-now),
mluis	1:d3b7bde3995c	2024	e_.info2 = LMIC.seqnoUp-1));
mluis	0:62d1edcc13d1	2025	os_setTimedCallback(&LMIC.osjob, txbeg-TX_RAMPUP, FUNC_ADDR(runEngineUpdate));
mluis	0:62d1edcc13d1	2026	}
mluis	0:62d1edcc13d1	2027
mluis	0:62d1edcc13d1	2028
mluis	0:62d1edcc13d1	2029	void LMIC_setAdrMode (bit_t enabled) {
mluis	0:62d1edcc13d1	2030	LMIC.adrEnabled = enabled ? FCT_ADREN : 0;
mluis	0:62d1edcc13d1	2031	}
mluis	0:62d1edcc13d1	2032
mluis	0:62d1edcc13d1	2033
mluis	0:62d1edcc13d1	2034	// Should we have/need an ext. API like this?
mluis	0:62d1edcc13d1	2035	void LMIC_setDrTxpow (dr_t dr, s1_t txpow) {
mluis	0:62d1edcc13d1	2036	setDrTxpow(DRCHG_SET, dr, txpow);
mluis	0:62d1edcc13d1	2037	}
mluis	0:62d1edcc13d1	2038
mluis	0:62d1edcc13d1	2039
mluis	0:62d1edcc13d1	2040	void LMIC_shutdown (void) {
mluis	0:62d1edcc13d1	2041	os_clearCallback(&LMIC.osjob);
mluis	0:62d1edcc13d1	2042	os_radio(RADIO_RST);
mluis	0:62d1edcc13d1	2043	LMIC.opmode \|= OP_SHUTDOWN;
mluis	0:62d1edcc13d1	2044	}
mluis	0:62d1edcc13d1	2045
mluis	0:62d1edcc13d1	2046
mluis	0:62d1edcc13d1	2047	void LMIC_reset (void) {
mluis	0:62d1edcc13d1	2048	EV(devCond, INFO, (e_.reason = EV::devCond_t::LMIC_EV,
mluis	1:d3b7bde3995c	2049	e_.eui = MAIN::CDEV->getEui(),
mluis	1:d3b7bde3995c	2050	e_.info = EV_RESET));
mluis	0:62d1edcc13d1	2051	os_radio(RADIO_RST);
mluis	0:62d1edcc13d1	2052	os_clearCallback(&LMIC.osjob);
mluis	0:62d1edcc13d1	2053
mluis	0:62d1edcc13d1	2054	os_clearMem((xref2u1_t)&LMIC,SIZEOFEXPR(LMIC));
mluis	1:d3b7bde3995c	2055	LMIC.devaddr = 0;
mluis	1:d3b7bde3995c	2056	LMIC.devNonce = os_getRndU2();
mluis	1:d3b7bde3995c	2057	LMIC.opmode = OP_NONE;
mluis	1:d3b7bde3995c	2058	LMIC.errcr = CR_4_5;
mluis	1:d3b7bde3995c	2059	LMIC.adrEnabled = FCT_ADREN;
mluis	1:d3b7bde3995c	2060	LMIC.dn2Dr = DR_DNW2; // we need this for 2nd DN window of join accept
mluis	1:d3b7bde3995c	2061	LMIC.dn2Freq = FREQ_DNW2; // ditto
mluis	1:d3b7bde3995c	2062	LMIC.ping.freq = FREQ_PING; // defaults for ping
mluis	1:d3b7bde3995c	2063	LMIC.ping.dr = DR_PING; // ditto
mluis	1:d3b7bde3995c	2064	LMIC.ping.intvExp = 0xFF;
mluis	1:d3b7bde3995c	2065	#if defined(CFG_us915)
mluis	0:62d1edcc13d1	2066	initDefaultChannels();
mluis	0:62d1edcc13d1	2067	#endif
mluis	1:d3b7bde3995c	2068	DO_DEVDB(LMIC.devaddr, devaddr);
mluis	1:d3b7bde3995c	2069	DO_DEVDB(LMIC.devNonce, devNonce);
mluis	1:d3b7bde3995c	2070	DO_DEVDB(LMIC.dn2Dr, dn2Dr);
mluis	1:d3b7bde3995c	2071	DO_DEVDB(LMIC.dn2Freq, dn2Freq);
mluis	1:d3b7bde3995c	2072	DO_DEVDB(LMIC.ping.freq, pingFreq);
mluis	1:d3b7bde3995c	2073	DO_DEVDB(LMIC.ping.dr, pingDr);
mluis	1:d3b7bde3995c	2074	DO_DEVDB(LMIC.ping.intvExp, pingIntvExp);
mluis	0:62d1edcc13d1	2075	}
mluis	0:62d1edcc13d1	2076
mluis	0:62d1edcc13d1	2077
mluis	0:62d1edcc13d1	2078	void LMIC_init (void) {
mluis	0:62d1edcc13d1	2079	LMIC.opmode = OP_SHUTDOWN;
mluis	0:62d1edcc13d1	2080	}
mluis	0:62d1edcc13d1	2081
mluis	0:62d1edcc13d1	2082
mluis	0:62d1edcc13d1	2083	void LMIC_clrTxData (void) {
mluis	0:62d1edcc13d1	2084	LMIC.opmode &= ~(OP_TXDATA\|OP_TXRXPEND\|OP_POLL);
mluis	0:62d1edcc13d1	2085	LMIC.pendTxLen = 0;
mluis	0:62d1edcc13d1	2086	if( (LMIC.opmode & (OP_JOINING\|OP_SCAN)) != 0 ) // do not interfere with JOINING
mluis	1:d3b7bde3995c	2087	return;
mluis	0:62d1edcc13d1	2088	os_clearCallback(&LMIC.osjob);
mluis	0:62d1edcc13d1	2089	os_radio(RADIO_RST);
mluis	0:62d1edcc13d1	2090	engineUpdate();
mluis	0:62d1edcc13d1	2091	}
mluis	0:62d1edcc13d1	2092
mluis	0:62d1edcc13d1	2093
mluis	0:62d1edcc13d1	2094	void LMIC_setTxData (void) {
mluis	0:62d1edcc13d1	2095	LMIC.opmode \|= OP_TXDATA;
mluis	0:62d1edcc13d1	2096	if( (LMIC.opmode & OP_JOINING) == 0 )
mluis	1:d3b7bde3995c	2097	LMIC.txCnt = 0; // cancel any ongoing TX/RX retries
mluis	0:62d1edcc13d1	2098	engineUpdate();
mluis	0:62d1edcc13d1	2099	}
mluis	0:62d1edcc13d1	2100
mluis	0:62d1edcc13d1	2101
mluis	0:62d1edcc13d1	2102	//
mluis	0:62d1edcc13d1	2103	int LMIC_setTxData2 (u1_t port, xref2u1_t data, u1_t dlen, u1_t confirmed) {
mluis	0:62d1edcc13d1	2104	if( dlen > SIZEOFEXPR(LMIC.pendTxData) )
mluis	1:d3b7bde3995c	2105	return -2;
mluis	0:62d1edcc13d1	2106	if( data != (xref2u1_t)0 )
mluis	1:d3b7bde3995c	2107	os_copyMem(LMIC.pendTxData, data, dlen);
mluis	0:62d1edcc13d1	2108	LMIC.pendTxConf = confirmed;
mluis	0:62d1edcc13d1	2109	LMIC.pendTxPort = port;
mluis	0:62d1edcc13d1	2110	LMIC.pendTxLen = dlen;
mluis	0:62d1edcc13d1	2111	LMIC_setTxData();
mluis	0:62d1edcc13d1	2112	return 0;
mluis	0:62d1edcc13d1	2113	}
mluis	0:62d1edcc13d1	2114
mluis	0:62d1edcc13d1	2115
mluis	0:62d1edcc13d1	2116	// Send a payload-less message to signal device is alive
mluis	0:62d1edcc13d1	2117	void LMIC_sendAlive (void) {
mluis	0:62d1edcc13d1	2118	LMIC.opmode \|= OP_POLL;
mluis	0:62d1edcc13d1	2119	engineUpdate();
mluis	0:62d1edcc13d1	2120	}
mluis	0:62d1edcc13d1	2121
mluis	0:62d1edcc13d1	2122
mluis	0:62d1edcc13d1	2123	// Check if other networks are around.
mluis	0:62d1edcc13d1	2124	void LMIC_tryRejoin (void) {
mluis	0:62d1edcc13d1	2125	LMIC.opmode \|= OP_REJOIN;
mluis	0:62d1edcc13d1	2126	engineUpdate();
mluis	0:62d1edcc13d1	2127	}
mluis	0:62d1edcc13d1	2128
mluis	1:d3b7bde3995c	2129	//! \brief Setup given session keys
mluis	1:d3b7bde3995c	2130	//! and put the MAC in a state as if
mluis	1:d3b7bde3995c	2131	//! a join request/accept would have negotiated just these keys.
mluis	1:d3b7bde3995c	2132	//! It is crucial that the combinations `devaddr/nwkkey` and `devaddr/artkey`
mluis	1:d3b7bde3995c	2133	//! are unique within the network identified by `netid`.
mluis	1:d3b7bde3995c	2134	//! NOTE: on Harvard architectures when session keys are in flash:
mluis	1:d3b7bde3995c	2135	//! Caller has to fill in LMIC.{nwk,art}Key before and pass {nwk,art}Key are NULL
mluis	1:d3b7bde3995c	2136	//! \param netid a 24 bit number describing the network id this device is using
mluis	1:d3b7bde3995c	2137	//! \param devaddr the 32 bit session address of the device. It is strongly recommended
mluis	1:d3b7bde3995c	2138	//! to ensure that different devices use different numbers with high probability.
mluis	1:d3b7bde3995c	2139	//! \param nwkKey the 16 byte network session key used for message integrity.
mluis	1:d3b7bde3995c	2140	//! If NULL the caller has copied the key into `LMIC.nwkKey` before.
mluis	1:d3b7bde3995c	2141	//! \param artKey the 16 byte application router session key used for message confidentiality.
mluis	1:d3b7bde3995c	2142	//! If NULL the caller has copied the key into `LMIC.artKey` before.
mluis	1:d3b7bde3995c	2143	void LMIC_setSession (u4_t netid, devaddr_t devaddr, xref2u1_t nwkKey, xref2u1_t artKey) {
mluis	0:62d1edcc13d1	2144	LMIC.netid = netid;
mluis	0:62d1edcc13d1	2145	LMIC.devaddr = devaddr;
mluis	1:d3b7bde3995c	2146	if( nwkKey != (xref2u1_t)0 )
mluis	1:d3b7bde3995c	2147	os_copyMem(LMIC.nwkKey, nwkKey, 16);
mluis	1:d3b7bde3995c	2148	if( artKey != (xref2u1_t)0 )
mluis	1:d3b7bde3995c	2149	os_copyMem(LMIC.artKey, artKey, 16);
mluis	0:62d1edcc13d1	2150
mluis	1:d3b7bde3995c	2151	#if defined(CFG_eu868)
mluis	0:62d1edcc13d1	2152	initDefaultChannels(0);
mluis	0:62d1edcc13d1	2153	#endif
mluis	1:d3b7bde3995c	2154
mluis	1:d3b7bde3995c	2155	LMIC.opmode &= ~(OP_JOINING\|OP_TRACK\|OP_REJOIN\|OP_TXRXPEND\|OP_PINGINI);
mluis	1:d3b7bde3995c	2156	LMIC.opmode \|= OP_NEXTCHNL;
mluis	0:62d1edcc13d1	2157	stateJustJoined();
mluis	0:62d1edcc13d1	2158	}
mluis	1:d3b7bde3995c	2159
mluis	1:d3b7bde3995c	2160	// Enable/disable link check validation.
mluis	1:d3b7bde3995c	2161	// LMIC sets the ADRACKREQ bit in UP frames if there were no DN frames
mluis	1:d3b7bde3995c	2162	// for a while. It expects the network to provide a DN message to prove
mluis	1:d3b7bde3995c	2163	// connectivity with a span of UP frames. If this no such prove is coming
mluis	1:d3b7bde3995c	2164	// then the datarate is lowered and a LINK_DEAD event is generated.
mluis	1:d3b7bde3995c	2165	// This mode can be disabled and no connectivity prove (ADRACKREQ) is requested
mluis	1:d3b7bde3995c	2166	// nor is the datarate changed.
mluis	1:d3b7bde3995c	2167	// This must be called only if a session is established (e.g. after EV_JOINED)
mluis	1:d3b7bde3995c	2168	void LMIC_setLinkCheckMode (bit_t enabled) {
mluis	1:d3b7bde3995c	2169	LMIC.adrChanged = 0;
mluis	1:d3b7bde3995c	2170	LMIC.adrAckReq = enabled ? LINK_CHECK_INIT : LINK_CHECK_OFF;
mluis	1:d3b7bde3995c	2171	}
mluis	1:d3b7bde3995c	2172
mluis	1:d3b7bde3995c	2173

Repository toolbox

Export to desktop IDE

Repository details

Type:	Library
Created:	20 Nov 2015
Imports:	3
Forks:	1
Commits:	4
Dependents:	1
Dependencies:	0
Followers:	1

lmic.cpp@1:d3b7bde3995c, 2015-03-31 (annotated)

Who changed what in which revision?

Repository toolbox

Repository details

Important Information for this Arm website

Access Warning