module_universal_io/iap/user/main.c

#include "at32f403a_407.h"
#include "at32f403a_407_board.h"
#include "at32f403a_407_clock.h"
#include "common_config.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
#include "usb_eth.h"
#include "mux.h"
#include "misc.h"
#include "spi_common.h"
#include "extended_sram.h"
#include "modbus.h"
#include "common_gpio.h"
#include "io.h"
#include "input.h"
#include "wdt.h"
#include <stdio.h>
#include <stdbool.h>
#include <string.h>


// 
void jump_to_app(uint32_t address);

void (*pftarget)(void);




int main()
{
    nvic_priority_group_config(NVIC_PRIORITY_GROUP_4);
  
    system_clock_config();

    delay_init();
    
    uart_print_init(115200);
    
    printf("IAP starting...\r\n");
    
    printf("Go to main FW\r\n");
    
    jump_to_app(0x08021000);
    
#if 0    
    // Check if valid stack address (RAM address) then jump to user application
    if (((*(__IO uint32_t*)USER_FLASH_FIRST_PAGE_ADDRESS) & 0x2FFD0000) == 0x20000000) {
        jump_to_app(0x08021000); 
    } else {
        // Флеш пустая, нечего загружать, висим в аварийном режиме 
        printf("\n\rFW empty. Started bootloader\n\r");
    }
#endif    
    
    while (1) {}
}


// 
void jump_to_app(uint32_t address)
{
    uint32_t stkptr, jumpaddr;
    stkptr = *(uint32_t *)address;
    jumpaddr = *(uint32_t *)(address + sizeof(uint32_t));
    
    __set_MSP(stkptr);
    pftarget = (void (*) (void))jumpaddr;
    pftarget();
}