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熟悉固件源码

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源码文件还是很多的，先从主函数开始一层层梳理

void et_user_main(void *pvParameters)
{
et_int32 rc = -1;
et_int32 num = 0;
id_info_t *id;
/* g_cloud_con_para.auto_relogin = TRUE;
g_cloud_con_para.clr_offline_mes = TRUE;
g_cloud_con_para.server_addr = ADDRESS;
g_cloud_con_para.server_port = PORT;*/
os_printf("ET U-SDK var%s\n",et_sdk_var());
to_stop_app = 0;
id = (id_info_t *)malloc(sizeof(id_info_t));
if(id == NULL)
{
os_printf("et_user_main, malloc id failed\n");
return ;
}
memset(id, 0, sizeof(id_info_t));
if(get_uid(id) ！= SPI_FLASH_RESULT_OK)
{
os_printf("et_user_main, get_uid error\n");
free(id);
return ;
}
g_cloud_handle = et_create_context(id->uid, id->appkey, SECRETKEY);
if(NULL == g_cloud_handle)
os_printf("Init et account failed\n");
et_set_callback(g_cloud_handle,et_message_process, et_event_process);
rc = et_start_svr(g_cloud_handle);
if(rc ！= 0)
{
os_printf("et_start_svr fail\n");
}
do
{
rc = et_login_cloud(g_cloud_handle, g_cloud_con_para);
if(rc ！= 0)
{
os_printf("login_cloud fail\n");
}
num++;
vTaskDelay(num*100*portTICK_RATE_MS);
}while(rc ！= 0 && num < 3 && to_stop_app == 0);
if(rc == 0)
{
os_printf("now start init friend\n");
init_clients();
// rc = et_get_buddies_online(g_cloud_handle);
rc = et_req_buddies_list(g_cloud_handle, LIST_ONLINE);
if(rc < 0)
os_printf("Get online buddies failed\n");
else
os_printf("Get online buddies sucess\n");
rc = et_sub_allbuddies_state(g_cloud_handle);
if(rc < 0)
os_printf("Sub all buddies state failed\n");
else
os_printf("Sub all buddies state sucess\n");
}
free(id);
vTaskDelete(NULL);
return ;
}

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以上是主函数部分，
通篇的os_printf,还有最后的vTaskDelete无不表明了，这涉及到操作系统了
g_cloud_con_para的相关配置，虽然注销掉了，但这可能就是涉及云端的处理部分了
但这不是主函数的开始

由给出的参考流程可知，在往上还有些初始化才对
查找函数调用，确实

/******************************************************************************
* FunctionName : user_esp_platform_check_ip
* Description : check whether get ip addr or not
* Parameters : none
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR
user_esp_platform_check_ip(void)
{
static et_uint32 time = 0;
struct ip_info ipconfig;
os_timer_disarm(&test_timer);
//get ip info of ESP8266 station
wifi_get_ip_info(STATION_IF, &ipconfig);
if (wifi_station_get_connect_status() == STATION_GOT_IP && ipconfig.ip.addr ！= 0)
{
os_printf("got ip ！ \r\n");
user_set_wifi_led_on();
if (user_main_start_flag == 0)
{
user_main_start_flag = 1;
xTaskCreate(et_user_main, "et_user_main", 512, NULL, 5, NULL);
}
wifi_reconnect_start_flag = 1;
}
else
{
if (wifi_station_get_connect_status() == STATION_WRONG_PASSWORD
|| wifi_station_get_connect_status() == STATION_NO_AP_FOUND
|| wifi_station_get_connect_status() == STATION_CONNECT_FAIL)
{
if ((system_get_time() - time) >= 5000000)
{
os_printf("connect fail wrong password or ssid wrong！ \r\n");
time = system_get_time();
}
if (air_kiss_start_flag == 1)
{
wifi_station_set_reconnect_policy(false);
smartconfig_stop();
air_kiss_start_flag = 0;
}
}
//re-arm timer to check ip
os_timer_setfn(&test_timer, (os_timer_func_t *)user_esp_platform_check_ip, NULL);
os_timer_arm(&test_timer, 1000, 0);
}
}

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果然是更深一层的操作系统部分，定时器设定、wifi状态设定、是否建立应用层主函数
xTaskCreate(et_user_main, "et_user_main", 512, NULL, 5, NULL);调用了之前的那个函数
而user_esp_platform_check_ip这个函数也在更上一层的user_init中被调用

/******************************************************************************
* FunctionName : user_init
* Description : entry of user application, init user function here
* Parameters : none
* Returns : none
*******************************************************************************/
void user_init(void)
{
key_gpio_t key;
struct station_config config;
struct ip_info info;
et_uchar result=0;
os_printf("now SDK version:%s\n", system_get_sdk_version());
if(get_fac_norm_mode(&result) ！= SPI_FLASH_RESULT_OK)
{
os_printf("get_fac_norm_mode error, NORMAL mode\n");
}
if(result == FAC_MODE)
{
os_printf("run in factory mode\n");
uart_init_new_uart1(BIT_RATE_115200);
UART_SetPrintPort(UART1);
uart_init_new(BIT_RATE_9600, result);
return;
}
os_printf("run in normal mode\n");
// show logo
user_show_logo();
if (RETURN_OK ！= user_get_work_mode(&work_mode))
{
os_printf("get work mode fail ！\n");
return;
}
if (RETURN_OK ！= user_init_work_mode(work_mode, result))
{
os_printf("init work mode fail ！\n");
return;
}
// wifi led control
xTaskCreate(user_wifi_led_control, "wifi_led_control", 256, NULL, 2, NULL);
//wifi event handle
wifi_set_event_handler_cb(et_wifi_event_cb);
memset(&key, 0, sizeof(key_gpio_t));
key.key_gpio_pin = AIRKISS_KEY_IO_PIN;
key.key_num = AIRKISS_KEY_IO_NUM;
airkiss_key_init(&key);
wifi_set_opmode(STATION_MODE);
wifi_reconnect_start_flag = 0;
xTaskCreate(airkiss_key_poll_task, "smartconfig_task", 256, NULL, 2, NULL);
memset(&config, 0, sizeof(struct station_config));
if(wifi_station_get_config_default(&config) == true)
{
os_printf("ssid=%s\n", config.ssid);
wifi_station_set_config_current(&config);
//for static ip set
/*wifi_station_dhcpc_stop();
IP4_ADDR(&info.ip, 192, 168, 1, 43);
IP4_ADDR(&info.gw, 192, 168, 1, 1);
IP4_ADDR(&info.netmask, 255, 255, 255, 0);
wifi_set_ip_info(STATION_IF, &info);*/
}
os_timer_disarm(&test_timer);
os_timer_setfn(&test_timer, (os_timer_func_t *)user_esp_platform_check_ip, NULL);
os_timer_arm(&test_timer, 1000, 0);
}

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在这一层对当前进度信息包括SDK的版本等不断输出，分别创建任务处理wifi控制led的和按键配置，并且具体的像GPIO的配制、wifi参数的配制、操作系统定时器的设置等底层基础的进行了设置
xTaskCreate(user_wifi_led_control, "wifi_led_control", 256, NULL, 2, NULL);
xTaskCreate(airkiss_key_poll_task, "smartconfig_task", 256, NULL, 2, NULL);
而user_init这个函数才是整个用户应用程序的开始，
不过再往前的系统初始化部分没找到
从user_init这个函数开始，一层层的，按照参考流程把主体函数给拎出来，从而对整体的源码就有了个初步了解

很好，如果可以把下一篇，上一篇留在片尾的话，可以更方便观看者。

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