Suga koubou / NECnfc

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Dependents:   NECnfc_sample Drone_air Drone_ground

NECnfc.cpp@2:9e108187ccfe, 2015-08-27 (annotated)

Committer:
okini3939
Date:
Thu Aug 27 05:41:24 2015 +0000
Revision:
2:9e108187ccfe
Parent:
1:5d157700a95d
Child:
4:07e752ff8dce
920MHz supported

Who changed what in which revision?

UserRevisionLine numberNew contents of line
okini3939 0:337524afec9b 1 /**
okini3939 0:337524afec9b 2 * NEC Near Field Communication RF module library for mbed
okini3939 0:337524afec9b 3 * Copyright (c) 2012 Suga
okini3939 0:337524afec9b 4 * Released under the MIT License: http://mbed.org/license/mit
okini3939 0:337524afec9b 5 */
okini3939 0:337524afec9b 6
okini3939 0:337524afec9b 7 /** @file
okini3939 0:337524afec9b 8 * @brief NEC Near Field Communication RF module library for mbed
okini3939 2:9e108187ccfe 9 * @note H001-000003-001 (950MHz), TY24FM-E2024 (2.4GHz), H001-000013-001 (920MHz)
okini3939 0:337524afec9b 10 */
okini3939 0:337524afec9b 11
okini3939 0:337524afec9b 12 #include "mbed.h"
okini3939 0:337524afec9b 13 #include "NECnfc.h"
okini3939 0:337524afec9b 14 #include <string.h>
okini3939 0:337524afec9b 15
okini3939 0:337524afec9b 16
okini3939 0:337524afec9b 17 // host to network short
okini3939 0:337524afec9b 18 #define htons( x ) ( (( (x) << 8 ) & 0xFF00) | (( (x) >> 8 ) & 0x00FF) )
okini3939 0:337524afec9b 19 #define ntohs( x ) htons(x)
okini3939 0:337524afec9b 20 // host to network long
okini3939 0:337524afec9b 21 #define htonl( x ) ( (( (x) << 24 ) & 0xFF000000) \
okini3939 0:337524afec9b 22 | (( (x) << 8 ) & 0x00FF0000) \
okini3939 0:337524afec9b 23 | (( (x) >> 8 ) & 0x0000FF00) \
okini3939 0:337524afec9b 24 | (( (x) >> 24 ) & 0x000000FF) )
okini3939 0:337524afec9b 25 #define ntohl( x ) htonl(x)
okini3939 0:337524afec9b 26
okini3939 0:337524afec9b 27
okini3939 0:337524afec9b 28 NECnfc::NECnfc (PinName p_tx, PinName p_rx, PinName p_reset) : rf(p_tx, p_rx), reset(p_reset) {
okini3939 0:337524afec9b 29 rxbuf = (char *)&rxmsg;
okini3939 0:337524afec9b 30 msgno = 0;
okini3939 0:337524afec9b 31 rxlen = 0;
okini3939 0:337524afec9b 32 rxmode = 0;
okini3939 0:337524afec9b 33 rxflg = 0;
okini3939 0:337524afec9b 34 }
okini3939 0:337524afec9b 35
okini3939 0:337524afec9b 36 int NECnfc::begin (int ch, NECBAUD baud, NECUART uart, NECPWR power, NECTYPE type) {
okini3939 0:337524afec9b 37 int no;
okini3939 0:337524afec9b 38 struct ifMessage ifmsg;
okini3939 0:337524afec9b 39 // high power, retry 0
okini3939 0:337524afec9b 40 char rfconf9[] = {power, ch, baud, 1, 0, uart, 1, 0xff, 0xff,
okini3939 0:337524afec9b 41 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
okini3939 2:9e108187ccfe 42 (NEC_SYSTEMID >> 8), (NEC_SYSTEMID & 0xff), (NEC_PRODUCTID >> 8), (NEC_PRODUCTID & 0xff)};
okini3939 2:9e108187ccfe 43 char rfconf2[] = {ch, 0, 0x01, 0x08, 0x08, 0x01, 0x04, 0x0a, 0x05, 0x03, 0x05,
okini3939 2:9e108187ccfe 44 0xff, 0xff, 0x00, 0, 0, 0x01, 0x51,
okini3939 2:9e108187ccfe 45 (NEC_SYSTEMID >> 8), (NEC_SYSTEMID & 0xff), (NEC_PRODUCTID >> 8), (NEC_PRODUCTID & 0xff)};
okini3939 0:337524afec9b 46
okini3939 0:337524afec9b 47 rf.baud(38400);
okini3939 0:337524afec9b 48 rf.attach(this, &NECnfc::isr_rx, Serial::RxIrq);
okini3939 0:337524afec9b 49
okini3939 0:337524afec9b 50 reset = 0; // reset
okini3939 0:337524afec9b 51 wait_ms(100);
okini3939 0:337524afec9b 52 reset = 1;
okini3939 0:337524afec9b 53 wait_ms(100);
okini3939 0:337524afec9b 54
okini3939 2:9e108187ccfe 55 switch (type) {
okini3939 2:9e108187ccfe 56 case TYPE_950MHz:
okini3939 2:9e108187ccfe 57 if (power == PWR_LOW && (ch < 1 || ch > 33)) return -1;
okini3939 2:9e108187ccfe 58 if (power >= PWR_MID && (ch < 17 || ch > 31)) return -1;
okini3939 0:337524afec9b 59 no = send(NECMSG_WRITE_CONFIG, 0xffffffff, rfconf9, sizeof(rfconf9));
okini3939 2:9e108187ccfe 60 break;
okini3939 2:9e108187ccfe 61 case TYPE_920MHz:
okini3939 2:9e108187ccfe 62 if (power <= PWR_MID && (ch < 24 || ch > 38)) return -1;
okini3939 2:9e108187ccfe 63 if (power >= PWR_HIGH && (ch < 24 || ch > 37 || ch == 32)) return -1;
okini3939 2:9e108187ccfe 64 no = send(NECMSG_WRITE_CONFIG, 0xffffffff, rfconf9, sizeof(rfconf9));
okini3939 2:9e108187ccfe 65 break;
okini3939 2:9e108187ccfe 66 case TYPE_2400MHz:
okini3939 2:9e108187ccfe 67 if (ch < 0 || ch > 15) return -1;
okini3939 2:9e108187ccfe 68 uart = UART_38400;
okini3939 2:9e108187ccfe 69 rfconf2[1] = (power >= PWR_HIGH ? 0x0f : 0x00);
okini3939 0:337524afec9b 70 no = send(NECMSG_WRITE_CONFIG, 0xffffffff, rfconf2, sizeof(rfconf2));
okini3939 0:337524afec9b 71 }
okini3939 0:337524afec9b 72 if (! read(&ifmsg) || ifmsg.msgid != NECMSG_ACK || ifmsg.msgno != no) {
okini3939 0:337524afec9b 73 return -1;
okini3939 0:337524afec9b 74 }
okini3939 0:337524afec9b 75
okini3939 0:337524afec9b 76 switch (uart) {
okini3939 0:337524afec9b 77 case UART_4800:
okini3939 0:337524afec9b 78 rf.baud(4800);
okini3939 0:337524afec9b 79 break;
okini3939 0:337524afec9b 80 case UART_9600:
okini3939 0:337524afec9b 81 rf.baud(9600);
okini3939 0:337524afec9b 82 break;
okini3939 0:337524afec9b 83 case UART_19200:
okini3939 0:337524afec9b 84 rf.baud(19200);
okini3939 0:337524afec9b 85 break;
okini3939 0:337524afec9b 86 case UART_38400:
okini3939 0:337524afec9b 87 rf.baud(38400);
okini3939 0:337524afec9b 88 break;
okini3939 0:337524afec9b 89 case UART_56700:
okini3939 0:337524afec9b 90 rf.baud(56700);
okini3939 0:337524afec9b 91 break;
okini3939 0:337524afec9b 92 case UART_115200:
okini3939 0:337524afec9b 93 rf.baud(115200);
okini3939 0:337524afec9b 94 break;
okini3939 0:337524afec9b 95 }
okini3939 0:337524afec9b 96
okini3939 0:337524afec9b 97 return 0;
okini3939 0:337524afec9b 98 }
okini3939 0:337524afec9b 99
okini3939 0:337524afec9b 100 void NECnfc::isr_rx () {
okini3939 0:337524afec9b 101 char dat;
okini3939 0:337524afec9b 102
okini3939 0:337524afec9b 103 dat = rf.getc();
okini3939 2:9e108187ccfe 104 DBG(" %02x", dat);
okini3939 0:337524afec9b 105
okini3939 0:337524afec9b 106 if (dat == 0x0f) {
okini3939 0:337524afec9b 107 // start (1/2)
okini3939 0:337524afec9b 108 rxmode = 1;
okini3939 0:337524afec9b 109 } else
okini3939 0:337524afec9b 110 if (rxmode == 1) {
okini3939 0:337524afec9b 111 if (dat == 0x5a) {
okini3939 0:337524afec9b 112 // start (2/2)
okini3939 0:337524afec9b 113 rxmode = 2;
okini3939 0:337524afec9b 114 rxlen = 0;
okini3939 0:337524afec9b 115 rxbuf[rxlen] = 0x0f;
okini3939 0:337524afec9b 116 rxlen ++;
okini3939 0:337524afec9b 117 rxbuf[rxlen] = dat;
okini3939 0:337524afec9b 118 rxlen ++;
okini3939 0:337524afec9b 119 } else {
okini3939 0:337524afec9b 120 if (rxlen) {
okini3939 0:337524afec9b 121 // continue (data)
okini3939 0:337524afec9b 122 rxmode = 2;
okini3939 0:337524afec9b 123 rxbuf[rxlen] = 0x0f;
okini3939 0:337524afec9b 124 rxlen ++;
okini3939 0:337524afec9b 125 rxbuf[rxlen] = dat;
okini3939 0:337524afec9b 126 rxlen ++;
okini3939 0:337524afec9b 127 } else {
okini3939 0:337524afec9b 128 // unknown
okini3939 0:337524afec9b 129 rxmode = 0;
okini3939 0:337524afec9b 130 }
okini3939 0:337524afec9b 131 }
okini3939 0:337524afec9b 132 } else
okini3939 0:337524afec9b 133 if (rxmode == 2) {
okini3939 0:337524afec9b 134 // data
okini3939 0:337524afec9b 135 rxbuf[rxlen] = dat;
okini3939 0:337524afec9b 136 rxlen ++;
okini3939 0:337524afec9b 137 if (rxlen >= rxmsg.length) {
okini3939 0:337524afec9b 138 rxmode = 3;
okini3939 0:337524afec9b 139 rxflg = 1;
okini3939 0:337524afec9b 140 }
okini3939 0:337524afec9b 141 }
okini3939 0:337524afec9b 142 }
okini3939 0:337524afec9b 143
okini3939 2:9e108187ccfe 144 int NECnfc::send (NECMSG msgid, unsigned long dest, char *param, int len) {
okini3939 0:337524afec9b 145 int i;
okini3939 0:337524afec9b 146 struct ifMessage ifmsg;
okini3939 0:337524afec9b 147 unsigned char *buf = (unsigned char *)&ifmsg;
okini3939 0:337524afec9b 148
okini3939 2:9e108187ccfe 149 if (len > NEC_MAXLENGTH) len = NEC_MAXLENGTH;
okini3939 0:337524afec9b 150 msgno ++;
okini3939 0:337524afec9b 151 ifmsg.start = htons(0x0f5a);
okini3939 0:337524afec9b 152 ifmsg.length = 13 + len;
okini3939 0:337524afec9b 153 ifmsg.msgid = msgid;
okini3939 0:337524afec9b 154 ifmsg.msgno = msgno;
okini3939 0:337524afec9b 155 ifmsg.dstid = htonl(dest);
okini3939 0:337524afec9b 156 ifmsg.srcid = htonl(0xffffffff);
okini3939 0:337524afec9b 157 memcpy(ifmsg.parameter, param, len);
okini3939 0:337524afec9b 158
okini3939 2:9e108187ccfe 159 DBG("\r\n");
okini3939 0:337524afec9b 160 for (i = 0; i < ifmsg.length; i ++) {
okini3939 0:337524afec9b 161 rf.putc(buf[i]);
okini3939 2:9e108187ccfe 162 DBG("_%02x", buf[i]);
okini3939 0:337524afec9b 163 }
okini3939 2:9e108187ccfe 164 DBG("\r\n");
okini3939 0:337524afec9b 165
okini3939 0:337524afec9b 166 return ifmsg.msgno;
okini3939 0:337524afec9b 167 }
okini3939 0:337524afec9b 168
okini3939 0:337524afec9b 169 int NECnfc::read (struct ifMessage *ifmsg, int timeout) {
okini3939 0:337524afec9b 170 Timer timer;
okini3939 0:337524afec9b 171
okini3939 0:337524afec9b 172 timer.start();
okini3939 0:337524afec9b 173 while (timer.read_ms() < timeout) {
okini3939 0:337524afec9b 174 if (rxflg) {
okini3939 0:337524afec9b 175 memcpy(ifmsg, &rxmsg, rxlen);
okini3939 0:337524afec9b 176 rxflg = 0;
okini3939 0:337524afec9b 177 rxmode = 0;
okini3939 0:337524afec9b 178 return rxlen;
okini3939 0:337524afec9b 179 }
okini3939 0:337524afec9b 180 }
okini3939 0:337524afec9b 181 return 0;
okini3939 0:337524afec9b 182 }
okini3939 0:337524afec9b 183
okini3939 0:337524afec9b 184 int NECnfc::readable () {
okini3939 0:337524afec9b 185 return rxflg;
okini3939 0:337524afec9b 186 }