ESP8266 Community Forum

- Tue Oct 25, 2016 2:06 am #57073 Hi All,

I have written a simple code for ESP8266-12E using ESP8266_NONOS_SDK_V2.0.0_16_07_19. With the code below (user_main.c)

Code: Select all#include <osapi.h>
#include <ets_sys.h>         //NEEDS TO BE THERE IN EVERY ESP8266 PROGRAM
#include "user_interface.h"      //NEEDS TO BE THERE IN EVERY ESP8266 PROGRAM
#include "uart.h"

void module_init_complete(void);
//void set_wifi_parameters(void);
//void wifi_event_handler_function(System_Event_t* event);
void setupPins(void);

void user_init(void)
{
   uart_div_modify(0, UART_CLK_FREQ / 115200);

   //register callback function for when environment
   //100% functional
   system_init_done_cb(module_init_complete);
}

void setupPins(void)
{

}

void module_init_complete(void)
{
   os_printf("hello world !\n");
   ets_printf("hello hello !\n");
}

uint32 ICACHE_FLASH_ATTR
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;

        default:
            rf_cal_sec = 0;
            break;
    }

    return rf_cal_sec;
}


From what I have understood, with the new SDK one more 4kb sector is reserved for RF calibration data, that needs to be programmed with blank.bin.

As per the function user_rf_cal_sector_set in my code (taken from examples), that sector is 123 ie. address 0x7B000. However as per the getting started guide, blank.bin should be programmed at the address 0x3FE000 (https://espressif.com/en/support/explor ... rted-guide, under FLASH MAP NON FOTA).

So which one is correct?

I tried programming my code using NODE MCU flasher (eagle.flash.bin @ 0x00000, eagle.irom0text.bin @ 0x10000 and blank.bin at both the above 2 address), but when I power on the esp8266 the blue light continuously flashes and i get stream of garbage data on UART0.

please help !

- Mon Nov 07, 2016 5:36 pm #57798 See my post in this forum on a very similar topic: viewtopic.php?f=159&t=12430

AFAIK, blank.bin doesn't contain the RF calibration values. That is in esp_init_data_default.bin which must be written to 0x3fc000 (for the 4MB part). My trouble is that I'm trying to write this sector from my startup sequence so I don't need to upload this file.

If you come across any more interesting info, let me know