[单片机框架][AT指令框架][从机版] 高内聚 低耦合_at指令解析框架

一、核心思想

1. 采用__attribute__((used)) attribute((section (“atcmd”)))的形式

优点：

1. 可以自由变换输出通道，实现三方通讯。
2. 注册AT指令，只用写到模块内部，不用耦合其他文件

二、下面就是举例使用方法：test.c

#include "atcmd_slave.h"

#if ATCMD_EN
// 在功能模块中定义一个标准函数
static int test(atcmd_pack_t *pack) {
   
    uint8_t buff[20] = "test\r\n";
    strcat((char*)buff, AT_OK);
    pack->reply(buff, strlen((char*)buff));
    return 0;
}

static int test2(atcmd_pack_t *pack) {
   
    if (pack->argc != 2) return -1;
    uint8_t buff[20] = "";
    uint8_t num = 0, num1 = 0;

    sscanf((char*)(pack->data), "%c,%c", &num, &num1);
    snprintf((char*)buff, 20, "%d,%d"AT_OK, num, num1);
    pack->reply(buff, strlen((char*)buff));
    return 1;
}

// 注册AT指令，传入标准函数
ATCMD_INIT("AT^TEST?", test);
ATCMD_INIT("AT^TEST=", test2);
#endif
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三、用串口举例

没有使用DMA和中断，仅提供思路。

uint8_t buff[255] = {
   0}; 
uint8_t len = 0;
void uart_rx_cb(uint8_t data) {
   
	buff[len] = data;
	len++;
	if (len == 1 && buff[0] != 'A')
		len = 0;
	else if (len == 2 && buff[1] != 'T')
		len = 0;
	else if (len == 3 && buff[2] != '^')
		len = 0;
	else if (buff[len] == '\n' && buff[len - 1] == '\r') {
   
		atcmd_pack_t pack;
		pack.reply = uart_send;
		pack.data = data;
		pack.len = len;
		atcmd_msg_handle(&pack);
	}
}
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如果使用DMA和中断，直接：

void uart_rx_cb(uint8_t *data， uint16_t len) {
   
	atcmd_pack_t pack;
	pack.reply = uart_send;
	pack.data = data;
	pack.len = len;
	atcmd_msg_handle(&pack);
}
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四、代码：

/********************************************************************************
 * @file    atcmd_slave.c
 * @author  jianqiang.xue
 * @Version V1.0.0
 * @Date    2022-09-04
 * @brief   从机版 AT指令 https://lisun.blog.csdn.net/article/details/126683930
 ********************************************************************************/
#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <string.h>

#include "atcmd_slave.h"

extern atcmd_info_t __atcmd_start;
extern atcmd_info_t __atcmd_end;

bool atcmd_msg_handle(atcmd_pack_t* pack) {
   
    bool match = false;
    atcmd_info_t* atcmd;
    for (atcmd = &__atcmd_start; atcmd < &__atcmd_end; atcmd++) {
   
      if (atcmd->name != (char *)0xFFFFFFFF) {
    
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