Entry function in ESP 8266
Posted: Mon Dec 09, 2019 8:03 amHello,
I was playing with ESP8266 with Arduino IDE. From this experience I have learned that all projects should contain two main functions - void setup() and void loop().
Later I moved to Visual Studio Code with Platformio and first sample with name Blink I choose has experience different structure :
Code contains 3 functions, but none of them are setup or loop. What basic principals of creating program for ESP8266? Which function is entry point? What function should persist in program?
I was playing with ESP8266 with Arduino IDE. From this experience I have learned that all projects should contain two main functions - void setup() and void loop().
Later I moved to Visual Studio Code with Platformio and first sample with name Blink I choose has experience different structure :
Code: Select all
user_rf_cal_sector_set(void)
{
enum flash_size_map size_map = system_get_flash_size_map();
uint32 rf_cal_sec = 0;
switch (size_map) {
case FLASH_SIZE_4M_MAP_256_256:
rf_cal_sec = 128 - 5;
break;
case FLASH_SIZE_8M_MAP_512_512:
rf_cal_sec = 256 - 5;
break;
case FLASH_SIZE_16M_MAP_512_512:
case FLASH_SIZE_16M_MAP_1024_1024:
rf_cal_sec = 512 - 5;
break;
case FLASH_SIZE_32M_MAP_512_512:
case FLASH_SIZE_32M_MAP_1024_1024:
rf_cal_sec = 1024 - 5;
break;
case FLASH_SIZE_64M_MAP_1024_1024:
rf_cal_sec = 2048 - 5;
break;
case FLASH_SIZE_128M_MAP_1024_1024:
rf_cal_sec = 4096 - 5;
break;
default:
rf_cal_sec = 0;
break;
}
return rf_cal_sec;
}
void blinky(void *arg)
{
static uint8_t state = 0;
if (state) {
GPIO_OUTPUT_SET(2, 1);
} else {
GPIO_OUTPUT_SET(2, 0);
}
state ^= 1;
}
void ICACHE_FLASH_ATTR user_init(void)
{
gpio_init();
uart_init(115200, 115200);
os_printf("SDK version:%s\n", system_get_sdk_version());
// Disable WiFi
wifi_set_opmode(NULL_MODE);
PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_GPIO2);
os_timer_disarm(&ptimer);
os_timer_setfn(&ptimer, (os_timer_func_t *)blinky, NULL);
os_timer_arm(&ptimer, 2000, 1);
}Code contains 3 functions, but none of them are setup or loop. What basic principals of creating program for ESP8266? Which function is entry point? What function should persist in program?