contiki/apps/at-master/at-master.h

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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.
*
*/
#ifndef AT_MASTER_H_
#define AT_MASTER_H_
#include "contiki.h"
/*---------------------------------------------------------------------------*/
#define AT_DEFAULT_RESPONSE_OK "\r\nOK\r\n"
#define AT_DEFAULT_RESPONSE_ERROR "\r\nERROR\r\n"
/*---------------------------------------------------------------------------*/
#define AT_RESPONSE(x) at_send((x), (strlen(x)))
/*---------------------------------------------------------------------------*/
extern process_event_t at_cmd_received_event;
struct at_cmd;
/*---------------------------------------------------------------------------*/
typedef enum {
AT_STATUS_OK,
AT_STATUS_ERROR,
AT_STATUS_INVALID_ARGS_ERROR,
} at_status_t;
/*---------------------------------------------------------------------------*/
/**
* \brief AT initialization
* \param uart selects which UART to use
*
* The AT driver invokes this function upon registering a command, this will
* wait for the serial_line_event_message event
*/
void at_init(uint8_t uart);
/*---------------------------------------------------------------------------*/
/**
* \brief AT initialization
* \param uart selects which UART to use
*
* The AT driver invokes this function upon registering a command, this will
* wait for the serial_line_event_message event
*/
uint8_t at_send(char *s, uint8_t len);
/*---------------------------------------------------------------------------*/
/**
* \brief AT event callback
* \param cmd A pointer to the AT command placeholder
* \param len Lenght of the received data (including the AT command header)
* \param data A user-defined pointer
*
* The AT event callback function gets called whenever there is an
* event on an incoming AT command
*/
typedef void (*at_event_callback_t)(struct at_cmd *cmd,
uint8_t len,
char *data);
/*---------------------------------------------------------------------------*/
struct at_cmd {
struct at_cmd *next;
const char *cmd_header;
uint8_t cmd_hdr_len;
uint8_t cmd_max_len;
at_event_callback_t event_callback;
struct process *app_process;
};
/*---------------------------------------------------------------------------*/
/**
* \brief Registers the callback to return an AT command
* \param cmd A pointer to the CMD placeholder
* \param cmd_hdr String to compare when an AT command is received
* \param cmd_len Lenght of cmd_hdr
* \param event_callback Callback function to handle the AT command
* \return AT_STATUS_OK or AT_STATUS_INVALID_ARGS_ERROR
*
* Register the commands to search for when a valid AT frame has been received
*/
at_status_t at_register(struct at_cmd *cmd,
struct process *app_process,
const char *cmd_hdr,
const uint8_t cmd_hdr_len,
const uint8_t cmd_max_len,
at_event_callback_t event_callback);
/*---------------------------------------------------------------------------*/
struct at_cmd *at_list(void);
/*---------------------------------------------------------------------------*/
/**
* \brief Registers the callback to return an AT command
* \param cmd A pointer to the CMD placeholder
* \param cmd_hdr String to compare when an AT command is received
* \param cmd_len Lenght of cmd_hdr
* \param event_callback Callback function to handle the AT command
* \return AT_STATUS_OK or AT_STATUS_INVALID_ARGS_ERROR
*
* Register the commands to search for when a valid AT frame has been received
*/
at_status_t at_register(struct at_cmd *cmd,
struct process *app_process,
const char *cmd_hdr,
const uint8_t cmd_hdr_len,
const uint8_t cmd_max_len,
at_event_callback_t event_callback);
#endif /* AT_MASTER_H_ */