2 * Copyright (c) 2014, Olivier MATZ <zer0@droids-corp.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the University of California, Berkeley nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #include <aversive/endian.h>
37 #include <aversive/wait.h>
38 #include <aversive/pgmspace.h>
43 #include <xbee_rxtx.h>
46 #include "xbee_user.h"
49 #define XBEE_TIMEOUT_MS 1000
50 #define XBEE_POLL_TIMER_MS 5
52 static struct xbee_ctx xbee_ctx[XBEE_MAX_CHANNEL];
54 int xbee_cmdline_input_enabled = 1;
59 static struct callout xbee_rx_poll_timer;
61 static void __hexdump(const void *buf, unsigned int len)
63 unsigned int i, out, ofs;
64 const unsigned char *data = buf;
66 char line[LINE_LEN]; /* space needed 8+16*3+3+16 == 75 */
70 /* format 1 line in the buffer, then use printk to print them */
71 out = snprintf_P(line, LINE_LEN, PSTR("%08X"), ofs);
72 for (i=0; ofs+i < len && i<16; i++)
73 out += snprintf_P(line+out, LINE_LEN - out,
77 out += snprintf(line+out, LINE_LEN - out, " ");
78 for (i=0; ofs < len && i<16; i++, ofs++) {
79 unsigned char c = data[ofs];
80 if (!isascii(c) || !isprint(c))
82 out += snprintf_P(line+out,
86 DEBUG(E_USER_XBEE, "%s", line);
90 static void hexdump_msg(const char *title, const struct xbee_msg *msg)
94 DEBUG(E_USER_XBEE, "dump %s", title);
96 for (i = 0; i < msg->iovlen; i++) {
97 DEBUG(E_USER_XBEE, "iovec %d at %p, len=%d", i,
98 msg->iov[i].buf, msg->iov[i].len);
99 __hexdump(msg->iov[i].buf, msg->iov[i].len);
103 void hexdump(const char *title, const void *buf, unsigned int len)
105 DEBUG(E_USER_XBEE, "dump %s at [%p], len=%d", title, buf, len);
109 static int parse_xmit_status(struct xbee_ctx *ctx,
110 struct xbee_xmit_status_hdr *frame, unsigned len)
115 ERROR(E_USER_XBEE, "no context");
119 /* see if it matches a xmit query (atcmd_query must be \0) */
120 if (ctx->atcmd_query[0] != '\0') {
121 ERROR(E_USER_XBEE, "invalid response 2");
125 /* XXX use defines for these values */
126 if (frame->delivery_status == 0x00)
127 NOTICE(E_USER_XBEE, "Success");
128 else if (frame->delivery_status == 0x01)
129 WARNING(E_USER_XBEE, "MAC ACK Failure");
130 else if (frame->delivery_status == 0x15)
131 WARNING(E_USER_XBEE, "Invalid destination endpoint");
132 else if (frame->delivery_status == 0x21)
133 WARNING(E_USER_XBEE, "Network ACK Failure");
134 else if (frame->delivery_status == 0x25)
135 WARNING(E_USER_XBEE, "Route Not Found");
140 /* Write in a human readable format the content of an atcmd response frame. It
141 * assumes the frame is valid .*/
142 void atresp_to_str(char *buf, unsigned buflen, const struct xbee_atresp_hdr *frame,
150 } __attribute__((packed)) *result;
152 const struct xbee_atcmd *cmd_pgm;
153 struct xbee_atcmd cmd;
155 /* get AT command from frame */
156 memcpy(atcmd_str, &frame->cmd, 2);
160 /* see if it exists */
161 cmd_pgm = xbee_atcmd_lookup_name(atcmd_str);
162 if (cmd_pgm == NULL) {
163 snprintf(buf, buflen, "<%s> (unknown cmd)", atcmd_str);
166 memcpy_P(&cmd, cmd_pgm, sizeof(cmd));
167 len -= sizeof(*frame);
170 result = (void *)frame->data;
172 if (cmd.flags & XBEE_ATCMD_F_PARAM_U8 && len == sizeof(uint8_t))
173 snprintf(buf, buflen, "<%s> is 0x%x (%d)", atcmd_str,
174 result->u8, result->u8);
175 else if (cmd.flags & XBEE_ATCMD_F_PARAM_U16 && len == sizeof(uint16_t))
176 snprintf(buf, buflen, "<%s> is 0x%x (%d)", atcmd_str,
177 ntohs(result->u16), ntohs(result->u16));
178 else if (cmd.flags & XBEE_ATCMD_F_PARAM_U32 && len == sizeof(uint32_t))
179 snprintf(buf, buflen, "<%s> is 0x%"PRIx32" (%"PRIu32")",
180 atcmd_str, ntohl(result->u32), ntohl(result->u32));
181 else if (cmd.flags & XBEE_ATCMD_F_PARAM_S16 && len == sizeof(int16_t))
182 snprintf(buf, buflen, "<%s> is %d",
183 atcmd_str, ntohs(result->s16));
185 snprintf(buf, buflen, "<%s> no data", atcmd_str);
187 snprintf(buf, buflen, "invalid atresp");
190 static int parse_atcmd(struct xbee_ctx *ctx, struct xbee_atresp_hdr *frame,
197 ERROR(E_USER_XBEE, "no context");
201 /* get AT command from frame */
202 memcpy(atcmd_str, &frame->cmd, 2);
205 /* see if it matches query */
206 if (memcmp(atcmd_str, ctx->atcmd_query, 2)) {
207 ERROR(E_USER_XBEE, "invalid response <%c%c><%s><%s>",
209 (frame->cmd >> 8) & 0xFF,
210 atcmd_str, ctx->atcmd_query);
215 if (frame->status == 1) {
216 WARNING(E_USER_XBEE, "Status is error");
219 else if (frame->status == 2) {
220 WARNING(E_USER_XBEE, "Invalid command");
223 else if (frame->status == 3) {
224 WARNING(E_USER_XBEE, "Invalid parameter");
227 else if (frame->status != 0) {
228 WARNING(E_USER_XBEE, "Unknown status error %d",
233 atresp_to_str(buf, sizeof(buf), frame, len);
235 len -= sizeof(*frame);
236 NOTICE(E_USER_XBEE, "status ok, datalen=%d, %s", len, buf);
239 hexdump("atcmd answer", frame->data, len);
245 /* Main xbee rx entry point for application. It decodes the xbee frame type and
246 * dispatch to the application layer. Then "len" argument does not include the
247 * xbee_hdr structure (delimiter, len, type, id) and checksum. */
248 int8_t xbeeapp_rx(struct xbee_dev *dev, int channel, int type,
249 void *frame, unsigned len, void *opaque)
251 struct xbee_ctx *ctx = opaque;
252 int8_t ret = XBEE_USER_RETCODE_OK;
254 NOTICE(E_USER_XBEE, "type=0x%x, channel=%d, ctx=%p",
256 __hexdump(frame, len);
258 /* if ctx is !NULL, it is an answer to a query */
260 xbee_unload_timeout(ctx);
261 if (ctx->atcmd_query[0])
262 NOTICE(E_USER_XBEE, "Received answer to query <%c%c>",
263 ctx->atcmd_query[0], ctx->atcmd_query[1]);
266 /* some additional checks before sending */
268 case XBEE_TYPE_MODEM_STATUS: {
269 NOTICE(E_USER_XBEE, "Received Modem Status frame");
273 case XBEE_TYPE_RMT_ATRESP: {
277 #if BYTE_ORDER == LITTLE_ENDIAN
286 memcpy(&addr, frame, sizeof(addr));
287 addr.u64 = ntohll(addr.u64);
289 "from remote address %"PRIx32"%"PRIx32"",
290 addr.u32.high, addr.u32.low);
292 /* this answer contains an atcmd answer at offset 10 */
293 if (parse_atcmd(ctx, frame + 10, len - 10) < 0)
294 ret = XBEE_USER_RETCODE_BAD_FRAME;
298 case XBEE_TYPE_ATRESP: {
299 if (parse_atcmd(ctx, frame, len) < 0)
300 ret = XBEE_USER_RETCODE_BAD_FRAME;
305 case XBEE_TYPE_XMIT_STATUS: {
306 if (parse_xmit_status(ctx, frame, len) < 0)
307 ret = XBEE_USER_RETCODE_BAD_FRAME;
312 case XBEE_TYPE_RECV: {
313 if (rc_proto_rx(frame, len) < 0)
314 ret = XBEE_USER_RETCODE_BAD_FRAME;
319 case XBEE_TYPE_ATCMD:
320 case XBEE_TYPE_ATCMD_Q:
322 case XBEE_TYPE_EXPL_XMIT:
323 case XBEE_TYPE_RMT_ATCMD:
324 case XBEE_TYPE_EXPL_RECV:
325 case XBEE_TYPE_NODE_ID:
327 ERROR(E_USER_XBEE, "Invalid frame");
328 ret = XBEE_USER_RETCODE_BAD_FRAME;
332 if (ret != XBEE_USER_RETCODE_OK) {
333 WARNING(E_USER_XBEE, "undecoded rx frame");
338 if (ctx->rx_cb != NULL)
339 ret = ctx->rx_cb(ret, frame, len, ctx->arg);
341 /* free channel now, it implicitely frees the context too */
342 xbee_unregister_channel(dev, channel);
348 /* called with callout prio == XBEE_PRIO */
349 static int xbeeapp_send(struct xbee_ctx *ctx, int type, struct xbee_msg *msg)
354 /* register a channel */
355 channel = xbee_register_channel(xbee_dev, XBEE_CHANNEL_ANY,
358 ERROR(E_USER_XBEE, "cannot send: no free channel");
362 /* copy context in the static struct table (avoiding a malloc) */
363 memcpy(&xbee_ctx[channel], ctx, sizeof(*ctx));
364 ctx = &xbee_ctx[channel];
365 xbee_set_opaque(xbee_dev, channel, ctx);
367 NOTICE(E_USER_XBEE, "send frame channel=%d type=0x%x", channel, type);
368 hexdump_msg("xmit frame", msg);
370 /* transmit the frame on this channel */
371 ret = xbee_tx_iovec(xbee_dev, channel, type, msg);
373 ERROR(E_USER_XBEE, "cannot send");
374 xbee_unregister_channel(xbee_dev, channel);
378 ctx->channel = channel;
379 xbee_load_timeout(ctx); /* load a timeout event */
384 /* send an AT command with parameters filled by caller. param is the argument
385 * of the atcmd (if any). */
386 int xbeeapp_send_atcmd(char *atcmd_str, void *param, unsigned param_len,
387 xbee_user_rx_cb_t *rx_cb, void *arg)
390 /* struct xbee_atcmd_hdr atcmd_hdr; -> no needed same than atcmd_str */
395 memset(&ctx, 0, sizeof(ctx));
396 ctx.atcmd_query[0] = atcmd_str[0];
397 ctx.atcmd_query[1] = atcmd_str[1];
401 if (param_len == 0) {
403 msg.iov[0].buf = atcmd_str;
408 msg.iov[0].buf = atcmd_str;
410 msg.iov[1].buf = param;
411 msg.iov[1].len = param_len;
414 prio = callout_mgr_set_prio(&xbeeboard.intr_cm, XBEE_PRIO);
415 if (prio > XBEE_PRIO)
416 ERROR(E_USER_XBEE, "invalid prio = %d\n", prio);
417 ret = xbeeapp_send(&ctx, XBEE_TYPE_ATCMD, &msg);
418 callout_mgr_restore_prio(&xbeeboard.intr_cm, prio);
423 int xbeeapp_send_msg(uint64_t addr, struct xbee_msg *msg,
424 xbee_user_rx_cb_t *rx_cb, void *arg)
427 struct xbee_xmit_hdr xmit_hdr;
428 struct xbee_msg msg2;
433 if (msg->iovlen + 2 > XBEE_MSG_MAXIOV) {
434 ERROR(E_USER_XBEE, "too many iovecs");
438 xmit_hdr.dstaddr = htonll(addr);
439 xmit_hdr.reserved = htons(0xFFFE);
440 xmit_hdr.bcast_radius = 0;
443 msg2.iovlen = msg->iovlen + 1;
444 msg2.iov[0].buf = &xmit_hdr;
445 msg2.iov[0].len = sizeof(xmit_hdr);
446 for (i = 0; i < msg->iovlen; i++)
447 msg2.iov[i+1] = msg->iov[i];
449 memset(&ctx, 0, sizeof(ctx));
453 prio = callout_mgr_set_prio(&xbeeboard.intr_cm, XBEE_PRIO);
454 if (prio > XBEE_PRIO)
455 ERROR(E_USER_XBEE, "invalid prio = %d\n", prio);
456 ret = xbeeapp_send(&ctx, XBEE_TYPE_XMIT, &msg2);
457 callout_mgr_restore_prio(&xbeeboard.intr_cm, prio);
462 static void evt_timeout(struct callout_mgr *cm, struct callout *clt,
465 struct xbee_ctx *ctx = arg;
470 WARNING(E_USER_XBEE, "Timeout");
473 if (ctx->rx_cb != NULL)
474 ctx->rx_cb(XBEE_USER_RETCODE_TIMEOUT, NULL, 0, ctx->arg);
476 /* free channel, it implicitely frees the context too */
477 xbee_unregister_channel(xbee_dev, ctx->channel);
478 callout_stop(cm, clt);
481 void xbee_load_timeout(struct xbee_ctx *ctx)
485 callout_init(&ctx->timeout, evt_timeout, ctx, XBEE_PRIO);
486 prio = callout_mgr_set_prio(&xbeeboard.intr_cm, XBEE_PRIO);
487 callout_schedule(&xbeeboard.intr_cm, &ctx->timeout, XBEE_TIMEOUT_MS);
488 callout_mgr_restore_prio(&xbeeboard.intr_cm, prio);
491 void xbee_unload_timeout(struct xbee_ctx *ctx)
495 prio = callout_mgr_set_prio(&xbeeboard.intr_cm, XBEE_PRIO);
496 callout_stop(&xbeeboard.intr_cm, &ctx->timeout);
497 callout_mgr_restore_prio(&xbeeboard.intr_cm, prio);
500 static void xbee_rx_poll_timer_cb(struct callout_mgr *cm, struct callout *tim,
505 callout_reschedule(cm, tim, XBEE_POLL_TIMER_MS);
508 void xbee_mainloop(void)
516 /* from xbee to cmdline */
517 c = xbee_dev_recv(NULL);
519 cmdline_dev_send((uint8_t)c, NULL);
521 /* from cmdline to xbee */
522 c = cmdline_dev_recv(NULL);
523 if (c == 4) { /* CTRL-d */
524 prio = callout_mgr_set_prio(&xbeeboard.intr_cm,
526 xbee_dev_send('A', NULL);
527 xbee_dev_send('T', NULL);
528 xbee_dev_send('C', NULL);
529 xbee_dev_send('N', NULL);
530 xbee_dev_send('\n', NULL);
531 callout_mgr_restore_prio(&xbeeboard.intr_cm, prio);
533 rdline_newline(&xbeeboard.rdl,
538 xbee_dev_send((uint8_t)c, NULL);
540 /* echo on cmdline */
541 cmdline_dev_send((uint8_t)c, NULL);
545 if (xbee_cmdline_input_enabled)
547 /* xbee rx polling is done in a timer, so we can block
548 * the cmdline without loosing incoming packets */
553 void xbee_stdin_enable(void)
555 xbee_cmdline_input_enabled = 1;
558 void xbee_stdin_disable(void)
560 xbee_cmdline_input_enabled = 0;
563 void xbeeapp_init(void)
565 callout_init(&xbee_rx_poll_timer, xbee_rx_poll_timer_cb,
567 callout_schedule(&xbeeboard.intr_cm, &xbee_rx_poll_timer,