单片机ISP实验

吴169

457人浏览 · 2026-06-04 00:45:00

吴169 · 2026-06-04 00:45:00 发布

单片机：STM32F407
开发板：DMF407电机开发板
平台：keil V5.31

HSE 为8MHZ
HSI为16MHZ

一、bootloader

主函数：

int main(void)
{
    uint8_t t;
    uint8_t key;
    uint32_t lastcount = 0; /* 上一次串口接收数据值 */
    uint32_t applenth = 0;  /* 接收到的app代码长度 */
    uint8_t clearflag = 0;

    HAL_Init();                             /* 初始化HAL库 */
    sys_stm32_clock_init(336, 8, 2, 7);     /* 设置时钟,168Mhz */
    delay_init(168);                        /* 延时初始化 */
    usart_init(115200);                     /* 串口初始化为115200 */
    led_init();                             /* 初始化LED */
    lcd_init();                             /* 初始化LCD */
    key_init();                             /* 初始化按键 */
    
    lcd_show_string(30,  50, 200, 16, 16, "STM32", RED);
    lcd_show_string(30,  70, 200, 16, 16, "IAP TEST", RED);
    lcd_show_string(30,  90, 200, 16, 16, "ATOM@ALIENTEK", RED);
    lcd_show_string(30, 110, 200, 16, 16, "KEY2: Copy APP2FLASH!", RED);
    lcd_show_string(30, 130, 200, 16, 16, "KEY1: Run FLASH APP", RED);
    lcd_show_string(30, 150, 200, 16, 16, "KEY0: Run SRAM APP", RED);

    while (1)
    {
        if (g_usart_rx_cnt)
        {
            if (lastcount == g_usart_rx_cnt)   /* 新周期内,没有收到任何数据,认为本次数据接收完成 */
            {
                applenth = g_usart_rx_cnt;
                lastcount = 0;
                g_usart_rx_cnt = 0;
                printf("用户程序接收完成!\r\n");
                printf("代码长度:%dBytes\r\n", applenth);
            }
            else
            {
                lastcount = g_usart_rx_cnt;
            }
        }

        t++;
        delay_ms(100);

        if (t == 3)
        {
            LED0_TOGGLE();
            t = 0;

            if (clearflag)
            {
                clearflag--;

                if (clearflag == 0)
                {
                    lcd_fill(30, 190, 240, 210 + 16, WHITE);    /* 清除显示 */
                }
            }
        }

        key = key_scan(0);

        if (key == KEY2_PRES)   /* KEY2按下,更新固件到FLASH */
        {
            if (applenth)
            {
                printf("开始更新固件...\r\n");
                lcd_show_string(30, 190, 200, 16, 16, "Copying APP2FLASH...", BLUE);

                if (((*(volatile uint32_t *)(0X20001000 + 4)) & 0xFF000000) == 0x08000000)  /* 判断是否为0X08XXXXXX */
                {
                    iap_write_appbin(FLASH_APP1_ADDR, g_usart_rx_buf, applenth);            /* 更新FLASH代码 */
                    lcd_show_string(30, 190, 200, 16, 16, "Copy APP Successed!!", BLUE);
                    printf("固件更新完成!\r\n");
                }
                else
                {
                    lcd_show_string(30, 190, 200, 16, 16, "Illegal FLASH APP!  ", BLUE);
                    printf("非FLASH应用程序!\r\n");
                }
            }
            else
            {
                printf("没有可以更新的固件!\r\n");
                lcd_show_string(30, 190, 200, 16, 16, "No APP!", BLUE);
            }

            clearflag = 7;  /* 标志更新了显示,并且设置7*300ms后清除显示 */
        }

        if (key == KEY1_PRES)   /* KEY1按键按下, 运行FLASH APP代码 */
        {
            printf("flash addr :%x \r\n",(*(volatile uint32_t *)(FLASH_APP1_ADDR + 4)) & 0xFF000000);
            if (((*(volatile uint32_t *)(FLASH_APP1_ADDR + 4)) & 0xFF000000) == 0x08000000) /* 判断FLASH里面是否有APP,有的话执行 */
            {
                printf("开始执行FLASH用户代码!!\r\n\r\n");
                delay_ms(10);
                iap_load_app(FLASH_APP1_ADDR);/* 执行FLASH APP代码 */
            }
            else
            {
                printf("没有可以运行的固件!\r\n");
                lcd_show_string(30, 190, 200, 16, 16, "No APP!", BLUE);
            }

            clearflag = 7; /* 标志更新了显示,并且设置7*300ms后清除显示 */
        }

        if (key == KEY0_PRES)   /* KEY0按下 */
        {
            printf("开始执行SRAM用户代码!!\r\n\r\n");
            delay_ms(10);

            if (((*(volatile uint32_t *)(0x20001000 + 4)) & 0xFF000000) == 0x20000000)   /* 判断是否为0X20XXXXXX */
            {
                iap_load_app(0x20001000);   /* SRAM地址 */
            }
            else
            {
                printf("非SRAM应用程序,无法执行!\r\n");
                lcd_show_string(30, 190, 200, 16, 16, "Illegal SRAM APP!", BLUE);
            }

            clearflag = 7; /* 标志更新了显示,并且设置7*300ms后清除显示 */
        }
    }
}

只有bootloader程序，运行结果：

按下key0，提示“Illegal SRAM APP!”

按下key1，提示“No APP!”

按下key2，提示“No APP!”

二、Flash_APP

主函数：

/* 定义字符数组用于显示周 */
char* weekdays[]={"Sunday", "Monday", "Tuesday", "Wednesday",
                  "Thursday", "Friday", "Saterday"};

int main(void)
{
    uint8_t hour, min, sec, ampm;
    uint8_t year, month, date, week;
    uint8_t tbuf[40];
    uint8_t t = 0;

    /* 设置中断向量表偏移量为0X10000 */
    sys_nvic_set_vector_table(FLASH_BASE, 0x10000);
    
    HAL_Init();                             /* 初始化HAL库 */
    sys_stm32_clock_init(336, 8, 2, 7);     /* 设置时钟,168Mhz */
    delay_init(168);                        /* 延时初始化 */
    usart_init(115200);                     /* 串口初始化为115200 */
    usmart_dev.init(84);                    /* 初始化USMART */
    led_init();                             /* 初始化LED */
    lcd_init();                             /* 初始化LCD */
    rtc_init();                             /* 初始化RTC */
    rtc_set_wakeup(RTC_WAKEUPCLOCK_CK_SPRE_16BITS, 0);  /* 配置WAKE UP中断, 1秒钟中断一次 */
    lcd_show_string(30, 50, 200, 16, 16, "STM32", RED);
    lcd_show_string(30, 70, 200, 16, 16, "RTC TEST", RED);
    lcd_show_string(30, 90, 200, 16, 16, "ATOM@ALIENTEK", RED);

    while (1)
    {
        t++;

        if ((t % 10) == 0)  /* 每100ms更新一次显示数据 */
        {
            rtc_get_time(&hour, &min, &sec, &ampm);
            sprintf((char *)tbuf, "Time:%02d:%02d:%02d", hour, min, sec);
            lcd_show_string(30, 130, 210, 16, 16, (char*)tbuf, RED);
            rtc_get_date(&year, &month, &date, &week);
            sprintf((char *)tbuf, "Date:20%02d-%02d-%02d", year, month, date);
            lcd_show_string(30, 150, 210, 16, 16, (char*)tbuf, RED);
            sprintf((char *)tbuf, "Week:%s", weekdays[week]);
            lcd_show_string(30, 170, 210, 16, 16, (char*)tbuf, RED);
        }

        if ((t % 20) == 0)
        {
            LED0_TOGGLE();  /* 每200ms,翻转一次LED0 */
        }

        delay_ms(10);
    }
}

烧录bootloader和flash_app，测试结果：

按下key0，

按下key1：

按下key2，提示“no app！”

三、SRAM_APP

主函数：

int main(void)
{
    /* 设置中断向量表 在SRAM里面, 且偏移量为 0x1000 */
    sys_nvic_set_vector_table(SRAM_BASE, 0x1000);
    HAL_Init();                         /* 初始化HAL库 */
    sys_stm32_clock_init(336,8,2,7);    /* 设置时钟, 168Mhz */
    delay_init(168);                    /* 延时初始化 */
    usart_init(115200);                 /* 串口初始化为115200 */
    led_init();                         /* 初始化LED */
    lcd_init();                         /* 初始化LCD */
    key_init();                         /* 初始化按键 */
    tp_dev.init();                      /* 触摸屏初始化 */

    lcd_show_string(30, 50, 200, 16, 16, "STM32", RED);
    lcd_show_string(30, 70, 200, 16, 16, "TOUCH TEST", RED);
    lcd_show_string(30, 90, 200, 16, 16, "ATOM@ALIENTEK", RED);

    if (tp_dev.touchtype != 0XFF)
    {
        lcd_show_string(30, 110, 200, 16, 16, "Press KEY0 to Adjust", RED); /* 电阻屏才显示 */
    }

    delay_ms(1500);
    load_draw_dialog();
    
    if (tp_dev.touchtype & 0X80)
    {
        ctp_test(); /* 电容屏测试 */
    }
    else
    {
        rtp_test(); /* 电阻屏测试 */
    }
}

下载失败！

Build started: Project: atk_f407
*** Using Compiler 'V5.06 update 6 (build 750)', folder: 'C:\Keil_v5\ARM\ARMCC\Bin'
Build target 'TOUCH'
After Build - User command #1: fromelf.exe --bin -o ..\..\Output\atk_f407.bin ..\..\Output\atk_f407.axf
"..\..\Output\atk_f407.axf" - 0 Error(s), 0 Warning(s).
Build Time Elapsed: 00:00:01
Load "..\\..\\Output\\atk_f407.axf"
No Algorithm found for: 20001000H - 2000D01FH
Erase skipped!
Error: Flash Download failed - "Cortex-M4"
Flash Load finished at 21:42:34