ZG2100NetIfSource - ZG2100 Network interface source

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ZG2100 Network interface source

drv/zg2100/zg_com.c@4:e00281c7453d, 2010-08-06 (annotated)

Committer:: donatien
Date:: Fri Aug 06 10:46:03 2010 +0000
Revision:: 4:e00281c7453d
Parent:: 1:3a7c15057192

Who changed what in which revision?

User	Revision	Line number	New contents of line
donatien	0:b802fc31f1db	1
donatien	0:b802fc31f1db	2	/*
donatien	0:b802fc31f1db	3	Copyright (c) 2010 Donatien Garnier (donatiengar [at] gmail [dot] com)
donatien	0:b802fc31f1db	4
donatien	0:b802fc31f1db	5	Permission is hereby granted, free of charge, to any person obtaining a copy
donatien	0:b802fc31f1db	6	of this software and associated documentation files (the "Software"), to deal
donatien	0:b802fc31f1db	7	in the Software without restriction, including without limitation the rights
donatien	0:b802fc31f1db	8	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
donatien	0:b802fc31f1db	9	copies of the Software, and to permit persons to whom the Software is
donatien	0:b802fc31f1db	10	furnished to do so, subject to the following conditions:
donatien	0:b802fc31f1db	11
donatien	0:b802fc31f1db	12	The above copyright notice and this permission notice shall be included in
donatien	0:b802fc31f1db	13	all copies or substantial portions of the Software.
donatien	0:b802fc31f1db	14
donatien	0:b802fc31f1db	15	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
donatien	0:b802fc31f1db	16	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
donatien	0:b802fc31f1db	17	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
donatien	0:b802fc31f1db	18	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
donatien	0:b802fc31f1db	19	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
donatien	0:b802fc31f1db	20	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
donatien	0:b802fc31f1db	21	THE SOFTWARE.
donatien	0:b802fc31f1db	22	*/
donatien	0:b802fc31f1db	23
donatien	0:b802fc31f1db	24	#include "netCfg.h"
donatien	0:b802fc31f1db	25	#if NET_ZG2100
donatien	0:b802fc31f1db	26
donatien	0:b802fc31f1db	27	#include "zg_defs.h"
donatien	0:b802fc31f1db	28	#include "zg_com.h"
donatien	0:b802fc31f1db	29
donatien	0:b802fc31f1db	30	#include "mbed.h" //For SPI, DigitalOut & InterruptIn
donatien	0:b802fc31f1db	31
donatien	0:b802fc31f1db	32	//#define __DEBUG
donatien	0:b802fc31f1db	33	#include "dbg/dbg.h"
donatien	0:b802fc31f1db	34
donatien	0:b802fc31f1db	35	#define ZG_CMD_BUF_SIZE 16
donatien	0:b802fc31f1db	36
donatien	0:b802fc31f1db	37	//Locals
donatien	0:b802fc31f1db	38	static SPI* m_pSpi;
donatien	0:b802fc31f1db	39	static DigitalOut* m_pCs;
donatien	1:3a7c15057192	40	//static InterruptIn* m_pInt;
donatien	1:3a7c15057192	41	static DigitalIn* m_pInt;
donatien	0:b802fc31f1db	42
donatien	0:b802fc31f1db	43	static byte cmd[ZG_CMD_BUF_SIZE] ZG_MEM;
donatien	0:b802fc31f1db	44
donatien	0:b802fc31f1db	45	//Functions
donatien	0:b802fc31f1db	46
donatien	1:3a7c15057192	47	void zg_com_init(SPI* pSpi, DigitalOut* pCs, /InterruptIn/ DigitalIn pInt, DigitalOut* pNrst)
donatien	0:b802fc31f1db	48	{
donatien	0:b802fc31f1db	49	m_pSpi = pSpi;
donatien	0:b802fc31f1db	50	m_pCs = pCs;
donatien	0:b802fc31f1db	51	m_pInt = pInt;
donatien	0:b802fc31f1db	52	m_pCs->write(ZG_SPI_CS_OFF); //Do no select chip for now
donatien	0:b802fc31f1db	53	m_pSpi->format(8,0); //8 bits / word, Mode 0
donatien	0:b802fc31f1db	54	//m_pSpi->frequency(1000000); //1Mhz - FMax is 25MHz
donatien	0:b802fc31f1db	55	m_pSpi->frequency(20000000); //20Mhz - FMax is 25MHz
donatien	0:b802fc31f1db	56	//Reset chip
donatien	0:b802fc31f1db	57	pNrst->write(ZG_SPI_RST_ON);
donatien	0:b802fc31f1db	58	wait_ms(100);
donatien	0:b802fc31f1db	59	//And release
donatien	0:b802fc31f1db	60	pNrst->write(ZG_SPI_RST_OFF);
donatien	1:3a7c15057192	61	// m_pInt->fall(zg_on_int); //Attach on interrupt callback
donatien	0:b802fc31f1db	62	}
donatien	0:b802fc31f1db	63
donatien	0:b802fc31f1db	64
donatien	0:b802fc31f1db	65	//Registers Access
donatien	0:b802fc31f1db	66
donatien	0:b802fc31f1db	67	uint32_t zg_register_read(uint32_t addr)
donatien	0:b802fc31f1db	68	{
donatien	0:b802fc31f1db	69	int len;
donatien	0:b802fc31f1db	70	uint32_t res;
donatien	0:b802fc31f1db	71
donatien	0:b802fc31f1db	72	len = ZG_REG_LEN( addr );
donatien	0:b802fc31f1db	73	cmd[0] = (byte)(ZG_CMD_REG_RD \| addr);
donatien	0:b802fc31f1db	74	memset( &cmd[1], 0, len );
donatien	0:b802fc31f1db	75
donatien	0:b802fc31f1db	76	zg_spi_trf(cmd, len + 1);
donatien	0:b802fc31f1db	77
donatien	0:b802fc31f1db	78	if(len==1)
donatien	0:b802fc31f1db	79	{
donatien	0:b802fc31f1db	80	res = cmd[1];
donatien	0:b802fc31f1db	81	}
donatien	0:b802fc31f1db	82	else //if(len == 2)
donatien	0:b802fc31f1db	83	{
donatien	0:b802fc31f1db	84	res = (uint16_t) DTOHS( ((uint16_t)&cmd[1]) );
donatien	0:b802fc31f1db	85	}
donatien	0:b802fc31f1db	86
donatien	0:b802fc31f1db	87	return res;
donatien	0:b802fc31f1db	88	}
donatien	0:b802fc31f1db	89
donatien	0:b802fc31f1db	90	void zg_register_write(uint32_t addr, uint32_t reg)
donatien	0:b802fc31f1db	91	{
donatien	0:b802fc31f1db	92	int len;
donatien	0:b802fc31f1db	93
donatien	0:b802fc31f1db	94	len = ZG_REG_LEN( addr );
donatien	0:b802fc31f1db	95	cmd[0] = (byte)(ZG_CMD_REG_WR \| addr);
donatien	0:b802fc31f1db	96
donatien	0:b802fc31f1db	97	if(len==1)
donatien	0:b802fc31f1db	98	{
donatien	0:b802fc31f1db	99	cmd[1] = reg;
donatien	0:b802fc31f1db	100	}
donatien	0:b802fc31f1db	101	else //if(len == 2)
donatien	0:b802fc31f1db	102	{
donatien	0:b802fc31f1db	103	((uint16_t)&cmd[1]) = HTODS( reg );
donatien	0:b802fc31f1db	104	}
donatien	0:b802fc31f1db	105
donatien	0:b802fc31f1db	106	zg_spi_trf(cmd, len + 1);
donatien	0:b802fc31f1db	107	}
donatien	0:b802fc31f1db	108
donatien	0:b802fc31f1db	109	//Indexed Registers Access
donatien	0:b802fc31f1db	110
donatien	0:b802fc31f1db	111	uint32_t zg_indexed_register_read(uint32_t addr)
donatien	0:b802fc31f1db	112	{
donatien	0:b802fc31f1db	113	zg_register_write( ZG_REG_IREG_ADDR, addr );
donatien	0:b802fc31f1db	114	return zg_register_read( ZG_REG_IREG_DATA );
donatien	0:b802fc31f1db	115	}
donatien	0:b802fc31f1db	116
donatien	0:b802fc31f1db	117	void zg_indexed_register_write(uint32_t addr, uint32_t reg)
donatien	0:b802fc31f1db	118	{
donatien	0:b802fc31f1db	119	zg_register_write( ZG_REG_IREG_ADDR, addr );
donatien	0:b802fc31f1db	120	zg_register_write( ZG_REG_IREG_DATA, reg );
donatien	0:b802fc31f1db	121	}
donatien	0:b802fc31f1db	122
donatien	0:b802fc31f1db	123	//Fifos
donatien	0:b802fc31f1db	124
donatien	0:b802fc31f1db	125	void zg_fifo_read( byte fifo, byte* pType, byte* pSubtype, byte* buf, int len )
donatien	0:b802fc31f1db	126	{
donatien	0:b802fc31f1db	127	cmd[0] = (fifo==ZG_FIFO_DATA)?ZG_CMD_FIFO_RD_DATA:ZG_CMD_FIFO_RD_MGMT;
donatien	0:b802fc31f1db	128	memset( &cmd[1], 0, 2 );
donatien	1:3a7c15057192	129	zg_spi_trf(cmd, 3, false, ZG_SPI_TRF); //false : Command not terminated yet
donatien	0:b802fc31f1db	130	*pType = cmd[1];
donatien	0:b802fc31f1db	131	*pSubtype = cmd[2];
donatien	0:b802fc31f1db	132
donatien	1:3a7c15057192	133	//memset(buf, 0, len);
donatien	1:3a7c15057192	134	zg_spi_trf(buf, len, true, ZG_SPI_READ);
donatien	0:b802fc31f1db	135
donatien	0:b802fc31f1db	136	cmd[0] = ZG_CMD_FIFO_RD_DONE;
donatien	1:3a7c15057192	137	zg_spi_trf(cmd, 1, true, ZG_SPI_WRITE);
donatien	0:b802fc31f1db	138	}
donatien	0:b802fc31f1db	139
donatien	0:b802fc31f1db	140	void zg_fifo_write( byte fifo, byte type, byte subtype, byte* buf, int len, bool start /= true/, bool stop /= true/ )
donatien	0:b802fc31f1db	141	{
donatien	0:b802fc31f1db	142	if(start)
donatien	0:b802fc31f1db	143	{
donatien	0:b802fc31f1db	144	cmd[0] = (fifo==ZG_FIFO_DATA)?ZG_CMD_FIFO_WR_DATA:ZG_CMD_FIFO_WR_MGMT;
donatien	0:b802fc31f1db	145	cmd[1] = type;
donatien	0:b802fc31f1db	146	cmd[2] = subtype;
donatien	1:3a7c15057192	147	zg_spi_trf(cmd, 3, false, ZG_SPI_WRITE); //false : Command not terminated yet
donatien	0:b802fc31f1db	148	}
donatien	0:b802fc31f1db	149
donatien	0:b802fc31f1db	150	/*if(len>0 && buf!=NULL)
donatien	0:b802fc31f1db	151	{*/
donatien	1:3a7c15057192	152	zg_spi_trf(buf, len, stop, ZG_SPI_WRITE);
donatien	0:b802fc31f1db	153	/}/
donatien	0:b802fc31f1db	154
donatien	0:b802fc31f1db	155	if(stop)
donatien	0:b802fc31f1db	156	{
donatien	0:b802fc31f1db	157	cmd[0] = ZG_CMD_FIFO_WR_DONE;
donatien	1:3a7c15057192	158	zg_spi_trf(cmd, 1, true, ZG_SPI_WRITE);
donatien	0:b802fc31f1db	159	}
donatien	0:b802fc31f1db	160	}
donatien	0:b802fc31f1db	161
donatien	0:b802fc31f1db	162
donatien	1:3a7c15057192	163	void zg_spi_trf(byte* buf, int len, bool resetCs /= true/, ZG_SPI_DIR dir /= ZG_SPI_TRF/)
donatien	0:b802fc31f1db	164	{
donatien	0:b802fc31f1db	165	int i;
donatien	0:b802fc31f1db	166	m_pCs->write(ZG_SPI_CS_ON);
donatien	0:b802fc31f1db	167
donatien	1:3a7c15057192	168	#ifdef __DEBUG
donatien	0:b802fc31f1db	169	DBG("\r\nDump: >>\r\n");
donatien	0:b802fc31f1db	170	for(i=0; i<len; i++)
donatien	0:b802fc31f1db	171	{
donatien	1:3a7c15057192	172	DBGL("%02x ", buf[i]);
donatien	0:b802fc31f1db	173	}
donatien	1:3a7c15057192	174	DBG("\r\n>>\r\n");
donatien	1:3a7c15057192	175	#endif
donatien	0:b802fc31f1db	176
donatien	1:3a7c15057192	177	switch(dir)
donatien	0:b802fc31f1db	178	{
donatien	1:3a7c15057192	179	case ZG_SPI_READ:
donatien	1:3a7c15057192	180	for(i=0; i<len; i++)
donatien	1:3a7c15057192	181	buf[i] = (byte) m_pSpi->write(0);
donatien	1:3a7c15057192	182	break;
donatien	1:3a7c15057192	183	case ZG_SPI_WRITE:
donatien	1:3a7c15057192	184	for(i=0; i<len; i++)
donatien	1:3a7c15057192	185	m_pSpi->write(buf[i]);
donatien	1:3a7c15057192	186	break;
donatien	1:3a7c15057192	187	case ZG_SPI_TRF:
donatien	1:3a7c15057192	188	default:
donatien	1:3a7c15057192	189	for(i=0; i<len; i++)
donatien	1:3a7c15057192	190	buf[i] = (byte) m_pSpi->write(buf[i]);
donatien	1:3a7c15057192	191	break;
donatien	0:b802fc31f1db	192	}
donatien	0:b802fc31f1db	193
donatien	1:3a7c15057192	194	#ifdef __DEBUG
donatien	0:b802fc31f1db	195	DBG("\r\nDump: <<\r\n");
donatien	0:b802fc31f1db	196	for(i=0; i<len; i++)
donatien	0:b802fc31f1db	197	{
donatien	1:3a7c15057192	198	DBGL("%02x ", buf[i]);
donatien	0:b802fc31f1db	199	}
donatien	0:b802fc31f1db	200	DBG("\r\n<<\r\n");
donatien	1:3a7c15057192	201	#endif
donatien	1:3a7c15057192	202
donatien	0:b802fc31f1db	203
donatien	0:b802fc31f1db	204	if(resetCs) //If false, allows to split transfer in multiple calls
donatien	0:b802fc31f1db	205	m_pCs->write(ZG_SPI_CS_OFF);
donatien	0:b802fc31f1db	206	}
donatien	0:b802fc31f1db	207
donatien	1:3a7c15057192	208	bool zg_is_int()
donatien	1:3a7c15057192	209	{
donatien	1:3a7c15057192	210	return !(m_pInt->read());
donatien	1:3a7c15057192	211	}
donatien	1:3a7c15057192	212
donatien	0:b802fc31f1db	213	#endif

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Type:	Program
Created:	09 Jul 2010
Imports:	20
Forks:	0
Commits:	5
Dependents:	0
Dependencies:	0
Followers:	3

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drv/zg2100/zg_com.c@4:e00281c7453d, 2010-08-06 (annotated)

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