148 lines
5 KiB
C
148 lines
5 KiB
C
/*
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* Copyright (c) 2015, Zolertia - http://www.zolertia.com
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "contiki.h"
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#include "contiki-lib.h"
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#include "at-master.h"
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#include "cpu.h"
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#include "dev/uart.h"
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#include "dev/serial-line.h"
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#include "dev/sys-ctrl.h"
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#include "lib/list.h"
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#include "sys/cc.h"
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#include <ctype.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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#define DEBUG 0
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#if DEBUG
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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LIST(at_cmd_list);
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process_event_t at_cmd_received_event;
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/*---------------------------------------------------------------------------*/
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static uint8_t at_uart = 0;
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/*---------------------------------------------------------------------------*/
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PROCESS(at_process, "AT process");
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(at_process, ev, data)
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{
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uint8_t plen;
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char *pch, *buf;
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struct at_cmd *a;
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PROCESS_BEGIN();
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL(ev == serial_line_event_message && data != NULL);
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buf = (char *)data;
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plen = strlen(buf);
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for(a = list_head(at_cmd_list); a != NULL; a = list_item_next(a)) {
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pch = strstr(buf, a->cmd_header);
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if((plen <= a->cmd_max_len) && (pch != NULL)) {
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if(strncmp(a->cmd_header, pch, a->cmd_hdr_len) == 0) {
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if((a->cmd_hdr_len == plen) || (a->cmd_max_len > a->cmd_hdr_len)) {
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a->event_callback(a, plen, (char *)pch);
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process_post(a->app_process, at_cmd_received_event, NULL);
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break;
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}
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}
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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struct at_cmd *
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at_list(void)
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{
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return list_head(at_cmd_list);
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}
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/*---------------------------------------------------------------------------*/
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uint8_t
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at_send(char *s, uint8_t len)
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{
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uint8_t i = 0;
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while(s && *s != 0) {
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if(i >= len) {
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break;
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}
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uart_write_byte(at_uart, *s++);
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i++;
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}
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return i;
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}
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/*---------------------------------------------------------------------------*/
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void
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at_init(uint8_t uart_sel)
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{
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static uint8_t inited = 0;
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if(!inited) {
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list_init(at_cmd_list);
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at_cmd_received_event = process_alloc_event();
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inited = 1;
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at_uart = uart_sel;
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uart_init(at_uart);
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uart_set_input(at_uart, serial_line_input_byte);
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serial_line_init();
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process_start(&at_process, NULL);
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PRINTF("AT: Started (%u)\n", at_uart);
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}
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}
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/*---------------------------------------------------------------------------*/
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at_status_t
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at_register(struct at_cmd *cmd, struct process *app_process,
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const char *cmd_hdr, const uint8_t hdr_len,
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const uint8_t cmd_max_len, at_event_callback_t event_callback)
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{
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if((hdr_len < 1) || (cmd_max_len < 1) || (!strncmp(cmd_hdr, "AT", 2) == 0) ||
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(event_callback == NULL)) {
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PRINTF("AT: Invalid argument\n");
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return AT_STATUS_INVALID_ARGS_ERROR;
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}
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memset(cmd, 0, sizeof(struct at_cmd));
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cmd->event_callback = event_callback;
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cmd->cmd_header = cmd_hdr;
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cmd->cmd_hdr_len = hdr_len;
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cmd->cmd_max_len = cmd_max_len;
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cmd->app_process = app_process;
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list_add(at_cmd_list, cmd);
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PRINTF("AT: registered HDR %s LEN %u MAX %u\n", cmd->cmd_header,
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cmd->cmd_hdr_len,
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cmd->cmd_max_len);
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return AT_STATUS_OK;
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}
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/*---------------------------------------------------------------------------*/
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