手机进入下载模式前_电压检测

if(pre_voltage_detect()){
                flashmode_low_voltage();
                while(1);
        }

int pre_voltage_detect()
{
        int avg_voltage = 0;

        printf(NULL, "N80 pre voltage detect.");
        avg_voltage = Get_Voltage();
        if(avg_voltage > 3750){
                printf(NULL, "download normally.");
                return 0;
        }
        else{
                printf(NULL, "go to while(1)");
                return 1;
        }

}

void flashmode_low_voltage()
{
    lcd_printf("low voltage", 0x3D,200,2,FONT_COLOR_RED,FONT_COLOR_GREEN,LCD_DRAWMODE_NORMAL);
}