Toyomasa Watarai / Mbed OS Mbed-example-WS-W27

Mbed Cloud example program for workshop in W27 2018.

Dependencies:   MMA7660 LM75B

easy-connect/wifi-x-nucleo-idw01m1/SPWFSA01/SPWFSA01.cpp@0:119624335925, 2018-06-30 (annotated)

Committer:
MACRUM
Date:
Sat Jun 30 01:40:30 2018 +0000
Revision:
0:119624335925
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MACRUM 0:119624335925 1 /* SPWFSA01 Device
MACRUM 0:119624335925 2 * Copyright (c) 2015 ARM Limited
MACRUM 0:119624335925 3 *
MACRUM 0:119624335925 4 * Licensed under the Apache License, Version 2.0 (the "License");
MACRUM 0:119624335925 5 * you may not use this file except in compliance with the License.
MACRUM 0:119624335925 6 * You may obtain a copy of the License at
MACRUM 0:119624335925 7 *
MACRUM 0:119624335925 8 * http://www.apache.org/licenses/LICENSE-2.0
MACRUM 0:119624335925 9 *
MACRUM 0:119624335925 10 * Unless required by applicable law or agreed to in writing, software
MACRUM 0:119624335925 11 * distributed under the License is distributed on an "AS IS" BASIS,
MACRUM 0:119624335925 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MACRUM 0:119624335925 13 * See the License for the specific language governing permissions and
MACRUM 0:119624335925 14 * limitations under the License.
MACRUM 0:119624335925 15 */
MACRUM 0:119624335925 16
MACRUM 0:119624335925 17 #include "SPWFSA01.h"
MACRUM 0:119624335925 18 #include "SpwfSAInterface.h"
MACRUM 0:119624335925 19 #include "mbed_debug.h"
MACRUM 0:119624335925 20
MACRUM 0:119624335925 21 #if MBED_CONF_IDW0XX1_EXPANSION_BOARD == IDW01M1
MACRUM 0:119624335925 22
MACRUM 0:119624335925 23 SPWFSA01::SPWFSA01(PinName tx, PinName rx,
MACRUM 0:119624335925 24 PinName rts, PinName cts,
MACRUM 0:119624335925 25 SpwfSAInterface &ifce, bool debug,
MACRUM 0:119624335925 26 PinName wakeup, PinName reset)
MACRUM 0:119624335925 27 : SPWFSAxx(tx, rx, rts, cts, ifce, debug, wakeup, reset) {
MACRUM 0:119624335925 28 }
MACRUM 0:119624335925 29
MACRUM 0:119624335925 30 bool SPWFSA01::open(const char *type, int* spwf_id, const char* addr, int port)
MACRUM 0:119624335925 31 {
MACRUM 0:119624335925 32 int socket_id;
MACRUM 0:119624335925 33 int value;
MACRUM 0:119624335925 34 int trials;
MACRUM 0:119624335925 35
MACRUM 0:119624335925 36 if(!_parser.send("AT+S.SOCKON=%s,%d,%s,ind", addr, port, type))
MACRUM 0:119624335925 37 {
MACRUM 0:119624335925 38 debug_if(_dbg_on, "\r\nSPWF> `SPWFSA01::open`: error opening socket (%d)\r\n", __LINE__);
MACRUM 0:119624335925 39 return false;
MACRUM 0:119624335925 40 }
MACRUM 0:119624335925 41
MACRUM 0:119624335925 42 /* handle both response possibilities here before returning
MACRUM 0:119624335925 43 * otherwise module seems to remain in inconsistent state.
MACRUM 0:119624335925 44 */
MACRUM 0:119624335925 45
MACRUM 0:119624335925 46 /* wait for first character */
MACRUM 0:119624335925 47 trials = 0;
MACRUM 0:119624335925 48 while((value = _parser.getc()) < 0) {
MACRUM 0:119624335925 49 if(trials++ > SPWFXX_MAX_TRIALS) {
MACRUM 0:119624335925 50 debug("\r\nSPWF> error opening socket (%d)\r\n", __LINE__);
MACRUM 0:119624335925 51 empty_rx_buffer();
MACRUM 0:119624335925 52 return false;
MACRUM 0:119624335925 53 }
MACRUM 0:119624335925 54 }
MACRUM 0:119624335925 55
MACRUM 0:119624335925 56 if(value != _cr_) { // Note: this is different to what the spec exactly says
MACRUM 0:119624335925 57 debug_if(_dbg_on, "\r\nSPWF> error opening socket (%d)\r\n", __LINE__);
MACRUM 0:119624335925 58 empty_rx_buffer();
MACRUM 0:119624335925 59 return false;
MACRUM 0:119624335925 60 }
MACRUM 0:119624335925 61
MACRUM 0:119624335925 62 if(!_recv_delim_lf()) { // Note: this is different to what the spec exactly says
MACRUM 0:119624335925 63 debug_if(_dbg_on, "\r\nSPWF> error opening socket (%d)\r\n", __LINE__);
MACRUM 0:119624335925 64 empty_rx_buffer();
MACRUM 0:119624335925 65 return false;
MACRUM 0:119624335925 66 }
MACRUM 0:119624335925 67
MACRUM 0:119624335925 68 value = _parser.getc();
MACRUM 0:119624335925 69 switch(value) {
MACRUM 0:119624335925 70 case ' ':
MACRUM 0:119624335925 71 if(_parser.recv("ID: %d\n", &socket_id)
MACRUM 0:119624335925 72 && _recv_ok()) {
MACRUM 0:119624335925 73 debug_if(_dbg_on, "AT^ ID: %d\r\n", socket_id);
MACRUM 0:119624335925 74
MACRUM 0:119624335925 75 *spwf_id = socket_id;
MACRUM 0:119624335925 76 return true;
MACRUM 0:119624335925 77 } else {
MACRUM 0:119624335925 78 empty_rx_buffer();
MACRUM 0:119624335925 79 }
MACRUM 0:119624335925 80 break;
MACRUM 0:119624335925 81 case 'E':
MACRUM 0:119624335925 82 if(_parser.recv("RROR: %255[^\n]\n", _msg_buffer) && _recv_delim_lf()) {
MACRUM 0:119624335925 83 debug_if(_dbg_on, "AT^ ERROR: %s (%d)\r\n", _msg_buffer, __LINE__);
MACRUM 0:119624335925 84 } else {
MACRUM 0:119624335925 85 debug_if(_dbg_on, "\r\nSPWF> error opening socket (%d)\r\n", __LINE__);
MACRUM 0:119624335925 86 empty_rx_buffer();
MACRUM 0:119624335925 87 }
MACRUM 0:119624335925 88 break;
MACRUM 0:119624335925 89 default:
MACRUM 0:119624335925 90 debug_if(_dbg_on, "\r\nSPWF> error opening socket (value=%d, %d)\r\n", value, __LINE__);
MACRUM 0:119624335925 91 break;
MACRUM 0:119624335925 92 }
MACRUM 0:119624335925 93
MACRUM 0:119624335925 94 return false;
MACRUM 0:119624335925 95 }
MACRUM 0:119624335925 96
MACRUM 0:119624335925 97 int SPWFSA01::_read_in(char* buffer, int spwf_id, uint32_t amount) {
MACRUM 0:119624335925 98 int ret = -1;
MACRUM 0:119624335925 99
MACRUM 0:119624335925 100 MBED_ASSERT(buffer != NULL);
MACRUM 0:119624335925 101
MACRUM 0:119624335925 102 /* block asynchronous indications */
MACRUM 0:119624335925 103 if(!_winds_off()) {
MACRUM 0:119624335925 104 return -1;
MACRUM 0:119624335925 105 }
MACRUM 0:119624335925 106
MACRUM 0:119624335925 107 /* read in data */
MACRUM 0:119624335925 108 if(_parser.send("AT+S.SOCKR=%d,%u", spwf_id, (unsigned int)amount)) {
MACRUM 0:119624335925 109 /* set high timeout */
MACRUM 0:119624335925 110 _parser.set_timeout(SPWF_READ_BIN_TIMEOUT);
MACRUM 0:119624335925 111 /* read in binary data */
MACRUM 0:119624335925 112 int read = _parser.read(buffer, amount);
MACRUM 0:119624335925 113 /* reset timeout value */
MACRUM 0:119624335925 114 _parser.set_timeout(_timeout);
MACRUM 0:119624335925 115 if(read > 0) {
MACRUM 0:119624335925 116 if(_recv_ok()) {
MACRUM 0:119624335925 117 ret = amount;
MACRUM 0:119624335925 118
MACRUM 0:119624335925 119 /* remove from pending sizes
MACRUM 0:119624335925 120 * (MUST be done before next async indications handling (e.g. `_winds_on()`)) */
MACRUM 0:119624335925 121 _remove_pending_pkt_size(spwf_id, amount);
MACRUM 0:119624335925 122 } else {
MACRUM 0:119624335925 123 debug_if(_dbg_on, "\r\nSPWF> failed to receive OK (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 124 empty_rx_buffer();
MACRUM 0:119624335925 125 }
MACRUM 0:119624335925 126 } else {
MACRUM 0:119624335925 127 debug_if(_dbg_on, "\r\nSPWF> failed to read binary data (%u:%d), (%s, %d)\r\n", amount, read, __func__, __LINE__);
MACRUM 0:119624335925 128 empty_rx_buffer();
MACRUM 0:119624335925 129 }
MACRUM 0:119624335925 130 } else {
MACRUM 0:119624335925 131 debug_if(_dbg_on, "\r\nSPWF> failed to send SOCKR (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 132 }
MACRUM 0:119624335925 133
MACRUM 0:119624335925 134 debug_if(_dbg_on, "\r\nSPWF> %s():\t%d:%d\r\n", __func__, spwf_id, amount);
MACRUM 0:119624335925 135
MACRUM 0:119624335925 136 /* unblock asynchronous indications */
MACRUM 0:119624335925 137 _winds_on();
MACRUM 0:119624335925 138
MACRUM 0:119624335925 139 return ret;
MACRUM 0:119624335925 140 }
MACRUM 0:119624335925 141
MACRUM 0:119624335925 142 /* betzw - TODO: improve performance! */
MACRUM 0:119624335925 143 bool SPWFSA01::_recv_ap(nsapi_wifi_ap_t *ap)
MACRUM 0:119624335925 144 {
MACRUM 0:119624335925 145 bool ret;
MACRUM 0:119624335925 146 unsigned int channel;
MACRUM 0:119624335925 147 int trials;
MACRUM 0:119624335925 148
MACRUM 0:119624335925 149 ap->security = NSAPI_SECURITY_UNKNOWN;
MACRUM 0:119624335925 150
MACRUM 0:119624335925 151 /* check for end of list */
MACRUM 0:119624335925 152 if(_recv_delim_cr_lf()) {
MACRUM 0:119624335925 153 return false;
MACRUM 0:119624335925 154 }
MACRUM 0:119624335925 155
MACRUM 0:119624335925 156 /* run to 'horizontal tab' */
MACRUM 0:119624335925 157 trials = 0;
MACRUM 0:119624335925 158 while(_parser.getc() != '\x09') {
MACRUM 0:119624335925 159 if(trials++ > SPWFXX_MAX_TRIALS) {
MACRUM 0:119624335925 160 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 161 return false;
MACRUM 0:119624335925 162 }
MACRUM 0:119624335925 163 }
MACRUM 0:119624335925 164
MACRUM 0:119624335925 165 /* read in next line */
MACRUM 0:119624335925 166 ret = _parser.recv("%255[^\n]\n", _msg_buffer) && _recv_delim_lf();
MACRUM 0:119624335925 167
MACRUM 0:119624335925 168 /* parse line - first phase */
MACRUM 0:119624335925 169 if(ret) {
MACRUM 0:119624335925 170 int val = sscanf(_msg_buffer,
MACRUM 0:119624335925 171 " %*s %hhx:%hhx:%hhx:%hhx:%hhx:%hhx CHAN: %u RSSI: %hhd SSID: \'%*255[^\']\'",
MACRUM 0:119624335925 172 &ap->bssid[0], &ap->bssid[1], &ap->bssid[2], &ap->bssid[3], &ap->bssid[4], &ap->bssid[5],
MACRUM 0:119624335925 173 &channel, &ap->rssi);
MACRUM 0:119624335925 174 if(val < 8) {
MACRUM 0:119624335925 175 ret = false;
MACRUM 0:119624335925 176 }
MACRUM 0:119624335925 177 }
MACRUM 0:119624335925 178
MACRUM 0:119624335925 179 /* parse line - second phase */
MACRUM 0:119624335925 180 if(ret) { // ret == true
MACRUM 0:119624335925 181 char value;
MACRUM 0:119624335925 182 char *rest, *first, *last;
MACRUM 0:119624335925 183
MACRUM 0:119624335925 184 /* decide about position of `CAPS:` */
MACRUM 0:119624335925 185 first = strchr(_msg_buffer, '\'');
MACRUM 0:119624335925 186 if(first == NULL) {
MACRUM 0:119624335925 187 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 188 return false;
MACRUM 0:119624335925 189 }
MACRUM 0:119624335925 190 last = strrchr(_msg_buffer, '\'');
MACRUM 0:119624335925 191 if((last == NULL) || (last < (first+1))) {
MACRUM 0:119624335925 192 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 193 return false;
MACRUM 0:119624335925 194 }
MACRUM 0:119624335925 195 rest = strstr(last, "CAPS:");
MACRUM 0:119624335925 196 if(rest == NULL) {
MACRUM 0:119624335925 197 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 198 return false;
MACRUM 0:119624335925 199 }
MACRUM 0:119624335925 200
MACRUM 0:119624335925 201 /* substitute '\'' with '\0' */
MACRUM 0:119624335925 202 *last = '\0';
MACRUM 0:119624335925 203
MACRUM 0:119624335925 204 /* copy values */
MACRUM 0:119624335925 205 memcpy(&ap->ssid, first+1, sizeof(ap->ssid)-1);
MACRUM 0:119624335925 206 ap->ssid[sizeof(ap->ssid)-1] = '\0';
MACRUM 0:119624335925 207 ap->channel = channel;
MACRUM 0:119624335925 208
MACRUM 0:119624335925 209 /* skip `CAPS: 0421 ` */
MACRUM 0:119624335925 210 if(strlen(rest) < 11) {
MACRUM 0:119624335925 211 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 212 return false;
MACRUM 0:119624335925 213 }
MACRUM 0:119624335925 214 rest += 11;
MACRUM 0:119624335925 215
MACRUM 0:119624335925 216 /* get next character */
MACRUM 0:119624335925 217 value = *rest++;
MACRUM 0:119624335925 218 if(value != 'W') { // no security
MACRUM 0:119624335925 219 ap->security = NSAPI_SECURITY_NONE;
MACRUM 0:119624335925 220 return true;
MACRUM 0:119624335925 221 }
MACRUM 0:119624335925 222
MACRUM 0:119624335925 223 /* determine security */
MACRUM 0:119624335925 224 {
MACRUM 0:119624335925 225 char buffer[10];
MACRUM 0:119624335925 226
MACRUM 0:119624335925 227 if(!(sscanf(rest, "%s%*[\x20]", (char*)&buffer) > 0)) { // '\0x20' == <space>
MACRUM 0:119624335925 228 return true;
MACRUM 0:119624335925 229 } else if(strncmp("EP", buffer, 10) == 0) {
MACRUM 0:119624335925 230 ap->security = NSAPI_SECURITY_WEP;
MACRUM 0:119624335925 231 return true;
MACRUM 0:119624335925 232 } else if(strncmp("PA2", buffer, 10) == 0) {
MACRUM 0:119624335925 233 ap->security = NSAPI_SECURITY_WPA2;
MACRUM 0:119624335925 234 return true;
MACRUM 0:119624335925 235 } else if(strncmp("PA", buffer, 10) != 0) {
MACRUM 0:119624335925 236 return true;
MACRUM 0:119624335925 237 }
MACRUM 0:119624335925 238
MACRUM 0:119624335925 239 /* got a "WPA", check for "WPA2" */
MACRUM 0:119624335925 240 rest += strlen(buffer);
MACRUM 0:119624335925 241 value = *rest++;
MACRUM 0:119624335925 242 if(value == '\0') { // no further protocol
MACRUM 0:119624335925 243 ap->security = NSAPI_SECURITY_WPA;
MACRUM 0:119624335925 244 return true;
MACRUM 0:119624335925 245 } else { // assume "WPA2"
MACRUM 0:119624335925 246 ap->security = NSAPI_SECURITY_WPA_WPA2;
MACRUM 0:119624335925 247 return true;
MACRUM 0:119624335925 248 }
MACRUM 0:119624335925 249 }
MACRUM 0:119624335925 250 } else { // ret == false
MACRUM 0:119624335925 251 debug("\r\nSPWF> WARNING: might happen in case of RX buffer overflow! (%s, %d)\r\n", __func__, __LINE__);
MACRUM 0:119624335925 252 }
MACRUM 0:119624335925 253
MACRUM 0:119624335925 254 return ret;
MACRUM 0:119624335925 255 }
MACRUM 0:119624335925 256
MACRUM 0:119624335925 257 int SPWFSA01::scan(WiFiAccessPoint *res, unsigned limit)
MACRUM 0:119624335925 258 {
MACRUM 0:119624335925 259 unsigned cnt = 0;
MACRUM 0:119624335925 260 nsapi_wifi_ap_t ap;
MACRUM 0:119624335925 261
MACRUM 0:119624335925 262 if (!_parser.send("AT+S.SCAN=a,s")) {
MACRUM 0:119624335925 263 return NSAPI_ERROR_DEVICE_ERROR;
MACRUM 0:119624335925 264 }
MACRUM 0:119624335925 265
MACRUM 0:119624335925 266 while (_recv_ap(&ap)) {
MACRUM 0:119624335925 267 if (cnt < limit) {
MACRUM 0:119624335925 268 res[cnt] = WiFiAccessPoint(ap);
MACRUM 0:119624335925 269 }
MACRUM 0:119624335925 270
MACRUM 0:119624335925 271 cnt++;
MACRUM 0:119624335925 272 if (limit != 0 && cnt >= limit) {
MACRUM 0:119624335925 273 break;
MACRUM 0:119624335925 274 }
MACRUM 0:119624335925 275 }
MACRUM 0:119624335925 276
MACRUM 0:119624335925 277 if(!_recv_ok()) {
MACRUM 0:119624335925 278 empty_rx_buffer();
MACRUM 0:119624335925 279 }
MACRUM 0:119624335925 280
MACRUM 0:119624335925 281 return cnt;
MACRUM 0:119624335925 282 }
MACRUM 0:119624335925 283
MACRUM 0:119624335925 284 #endif // MBED_CONF_IDW0XX1_EXPANSION_BOARD