写STM8flash和写外部flash EN25Q16A-104HIP 的函数小纪

uint8 program_data(uint16 flash_addr,uint8 buffer[],uint8 len)
{
    uint8 i,flagstatus;
    uint16 address;
    int8 trycnt=1;
    //u16 timeout = 0xFFFF;
    
retry_lbl:
    if(trycnt-- <= 0) return(0);

    FLASH->CR1 &= (u8)(~0x01);
    FLASH->CR1 |= (u8)0x00;

    address  = flash_addr;
    for(i = 0; i < len; i++)
    {
        clr_watchdog(NULL);
        /* Unlock Program memory */
        FLASH_Unlock(FLASH_MEMTYPE_PROG);
        *((uint8 *) address) = buffer[i];
        while (flagstatus == 0x00)
        {
            flagstatus = (u8)(FLASH->IAPSR & ((u8)(0x04) |(u8)(0x01)));
            //timeout--;
        }
        FLASH_Lock(FLASH_MEMTYPE_PROG);
        address++;
    }
    address = flash_addr;
    for(i = 0; i < len; i++)
    {
        if(*((u8*) address) != buffer[i]) goto retry_lbl;
        address++;
    }
    return(1);
}