nes-proj/os/services/at-master/at-master.c

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2016-05-15 09:20:23 +00:00
/*
* Copyright (c) 2015, Zolertia - http://www.zolertia.com
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include "contiki.h"
#include "contiki-lib.h"
#include "at-master.h"
#include "cpu.h"
#include "dev/uart.h"
#include "dev/serial-line.h"
#include "dev/sys-ctrl.h"
#include "lib/list.h"
#include "sys/cc.h"
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <stdint.h>
/*---------------------------------------------------------------------------*/
#define DEBUG 0
#if DEBUG
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
/*---------------------------------------------------------------------------*/
LIST(at_cmd_list);
process_event_t at_cmd_received_event;
/*---------------------------------------------------------------------------*/
static uint8_t at_uart = 0;
/*---------------------------------------------------------------------------*/
PROCESS(at_process, "AT process");
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(at_process, ev, data)
{
uint8_t plen;
char *pch, *buf;
struct at_cmd *a;
PROCESS_BEGIN();
while(1) {
PROCESS_WAIT_EVENT_UNTIL(ev == serial_line_event_message && data != NULL);
buf = (char *)data;
plen = strlen(buf);
for(a = list_head(at_cmd_list); a != NULL; a = list_item_next(a)) {
pch = strstr(buf, a->cmd_header);
if((plen <= a->cmd_max_len) && (pch != NULL)) {
if(strncmp(a->cmd_header, pch, a->cmd_hdr_len) == 0) {
if((a->cmd_hdr_len == plen) || (a->cmd_max_len > a->cmd_hdr_len)) {
a->event_callback(a, plen, (char *)pch);
process_post(a->app_process, at_cmd_received_event, NULL);
break;
}
}
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
struct at_cmd *
at_list(void)
{
return list_head(at_cmd_list);
}
/*---------------------------------------------------------------------------*/
uint8_t
at_send(char *s, uint8_t len)
{
uint8_t i = 0;
while(s && *s != 0) {
if(i >= len) {
break;
}
uart_write_byte(at_uart, *s++);
i++;
}
return i;
}
/*---------------------------------------------------------------------------*/
void
at_init(uint8_t uart_sel)
{
static uint8_t inited = 0;
if(!inited) {
list_init(at_cmd_list);
at_cmd_received_event = process_alloc_event();
inited = 1;
at_uart = uart_sel;
uart_init(at_uart);
uart_set_input(at_uart, serial_line_input_byte);
serial_line_init();
process_start(&at_process, NULL);
PRINTF("AT: Started (%u)\n", at_uart);
}
}
/*---------------------------------------------------------------------------*/
at_status_t
at_register(struct at_cmd *cmd, struct process *app_process,
const char *cmd_hdr, const uint8_t hdr_len,
const uint8_t cmd_max_len, at_event_callback_t event_callback)
{
if((hdr_len < 1) || (cmd_max_len < 1) || (!strncmp(cmd_hdr, "AT", 2) == 0) ||
(event_callback == NULL)) {
PRINTF("AT: Invalid argument\n");
return AT_STATUS_INVALID_ARGS_ERROR;
}
memset(cmd, 0, sizeof(struct at_cmd));
cmd->event_callback = event_callback;
cmd->cmd_header = cmd_hdr;
cmd->cmd_hdr_len = hdr_len;
cmd->cmd_max_len = cmd_max_len;
cmd->app_process = app_process;
list_add(at_cmd_list, cmd);
PRINTF("AT: registered HDR %s LEN %u MAX %u\n", cmd->cmd_header,
cmd->cmd_hdr_len,
cmd->cmd_max_len);
return AT_STATUS_OK;
}
/*---------------------------------------------------------------------------*/