boot_main.c

shengji chengxu daoshi hezai xiaznai

#include "hal.h"
#include "uart.h"
#include "code_upgrade.h"

/* mcu power up or reboot
*/
void _mcu_init(void)
{

    SCFI0=FN_4;
    SCFQCTL|=SCFQ_4M;
    // Init WDT
    _clr_wdt();

    FLL_CTL0|=XCAP14PF;      // Configure load caps
    BTCTL=BT_ADLY_125+BT_fLCD_DIV128;
    
    // init port 1
    P1SEL=P1SEL_VAL;
    P1DIR=P1DIR_VAL;
    P1OUT=P1OUT_VAL;
    P1IES=P1IES_VAL;
   // P1IFG=0;
   // P1IE=P1IE_VAL;

    // init port 2
    P2SEL=P2SEL_VAL;
    P2DIR=P2DIR_VAL;
    P2OUT=P2OUT_VAL;
    P2IES=P2IES_VAL;
    //P2IFG=0;
   // P2IE=P2IE_VAL;
    // init port 6
    P6DIR=P6DIR_VAL;
    P6OUT=P6OUT_VAL;
    //init uart
    _uart_wait();

  
}


#define SET_NAK_FLAG(flg) (flg=0x4FFFF)// about 4 seconds
void boot_main(void)
{     
    _t_frm _frm_buf;
    _t_pre_frm pre_frm;
    unsigned short time_out;
    unsigned long s_nak_flg=0;
    
    _mcu_init();
    
    if(code_sel())
    {
        pre_frm.resp=0;
        _frm_buf.flash_ptr=0;
        
        erase_all_user_code();
        time_out=BOOT_CODE_STA;
        flash_write_byte((unsigned char *)0xFFFF, (unsigned char)time_out);
        time_out=0x0;
        flash_write_byte((unsigned char *)0xFFFE, (unsigned char)time_out);
    } 

    while(code_sel())
    {
        _clr_wdt();
        if(IFG1&URXIFG0)
        {
            check_rx_buffer((unsigned char *)&_frm_buf.soh,(unsigned char *)&pre_frm.blk);  
            time_out=0xFFFF;
        }
        if(time_out) 
        {
            time_out--;
            SET_NAK_FLAG(s_nak_flg);
        }
        if(time_out==0)
        {
            _frm_buf.ptr=0;
        }
        if(s_nak_flg)
        {
            s_nak_flg--;
        }
        if(s_nak_flg==0)
        {     
            _uart_start_to_tx(ASCII_NAK);
            _uart_start_to_rx((unsigned char *)&_frm_buf.soh);
            SET_NAK_FLAG(s_nak_flg);
        }
    }
}

void main(void) @ "USERCODE"
{

}