STM32F103VE+Air720H+AT_Client升级过程分享

发布于 2020-04-14 19:54:52 浏览：1667 订阅该版

* 本帖最后由 yc985055 于 2020-4-14 19:58 编辑 *

这些天一直在测试STM32F103VE通过Air720H的HTTP功能升级固件。
其中参考了官方文档
[https://www.rt-thread.org/docume ... -rtboot/#bootloader](https://www.rt-thread.org/document/site/application-note/system/rtboot/an0028-rtboot/#bootloader)
和以下链接
[https://www.rt-thread.org/qa/for ... ypeid%26typeid%3D64](https://www.rt-thread.org/qa/forum.php?mod=viewthread&tid=423550&extra=page%3D1%26filter%3Dtypeid%26typeid%3D64)
1.下面是擦除download分区和写数据函数。
/***************************************************************************************************
* @fn       hw_upgrade_start(void)
*
* @brief     erase  flash
*
* @param
*
* @return   none
****************************************************************************************************/;
static void hw_upgrade_start(void)
{
    http_size_bytes = 0;
    http_size_conts = 0;
    http_size_conts_max = 0;
    u16UdpCrc = 0;

rt_kprintf("hw_upgrade_start() !!! ");
 if ((dl_part = fal_partition_find(recv_partition)) == RT_NULL)
 {
 rt_kprintf("Firmware download failed! Partition (%s) find error!", recv_partition);
 return;
 }
 /* erase DL section */
 if (fal_partition_erase(dl_part, 0, 196 * 1024) < 0)
 {
 rt_kprintf("Firmware download failed! Partition (%s) erase error!", dl_part->name);
 return ;
 }

//stm32_flash_erase ((rt_uint32_t)INT_FLASH_DOWNLOAD_ADDR, 196 * 1024);
}

/***************************************************************************************************
* @fn       void hw_upgrade_data_save(rt_uint8_t *pDataBuf, rt_uint16_t dataLen)
*
* @brief    save upgrade data to flash
*
* @param 
*
* @return   none
****************************************************************************************************/
static void hw_upgrade_data_save(rt_uint8_t *pDataBuf, rt_uint16_t dataLen)
{
    rt_uint16_t tempU16 = 0;
    tempU16 = dataLen;

//if (tempU16 == stm32_flash_write((rt_uint32_t)INT_FLASH_DOWNLOAD_ADDR + (rt_uint32_t)(http_size_conts * HTTP_SIZE_PER_PKT), pDataBuf, dataLen))
    if (fal_partition_write(dl_part, (rt_uint32_t)(http_size_conts * HTTP_SIZE_PER_PKT), pDataBuf, dataLen) > 0)
    {
        http_size_conts++;

//计算校验,最后两字节是校验值,不参与运算
 rt_kprintf("http_size_conts is-%d!!! UdpCrc is 0x%04x !!!0x%02x 0x%02x ", http_size_conts, u16UdpCrc, pDataBuf[tempU16 - 2], pDataBuf[tempU16 - 1]);
 if (tempU16 < HTTP_SIZE_PER_PKT)
 {
 tempU16 -= 2;
 }
 for (rt_uint16_t i = 0; i < tempU16; i++)
 {
 u16UdpCrc = hw_udp_pkt_run_poly(u16UdpCrc, pDataBuf*);
 }
 }
 else
 {
 rt_kprintf("fal_partition_write() error ");
 }
}

注：其实用stm32_flash_erase(...) stm32_flash_write(...)来执行是一样的，我开始升级不成功，以为是它们的原因。所以调用了ymodem_ota中的两个函数。

2.http读取数据函数。
  http线程函数
｛
        case HTTP_READ_DATA:
            
            {
                if ((http_size_bytes - http_size_conts * HTTP_SIZE_PER_PKT) >= HTTP_SIZE_PER_PKT)
                {
                    u16Temp = HTTP_SIZE_PER_PKT;
                }
                else
                {
                    u16Temp = http_size_bytes - http_size_conts * HTTP_SIZE_PER_PKT;
                }

rt_kprintf("http_size_bytes %d http_size_conts:%d http_size_conts_max:%d ", http_size_bytes, http_size_conts, http_size_conts_max);

at_delete_resp(resp);
                resp = at_create_resp(HTTP_SIZE_PER_PKT + 56, 0, rt_tick_from_millisecond(500));
                if(resp == NULL)
                {
                    rt_kprintf(" create HTTP resp no memory");
                }
                sprintf((char *)HTTP_CMD_READ,(char const *)"%s%d%s%d",(char const *)"AT+HTTPREAD=", (rt_uint32_t)(http_size_conts * HTTP_SIZE_PER_PKT), ",", u16Temp);

if (at_exec_cmd(resp, HTTP_CMD_READ) == RT_EOK)
 {
 http_read_func(resp);
 }
 else
 {
 rt_kprintf("at_exec_cmd return error ");
 }
 }
｝
/***************************************************************************************************
* @fn void http_read_func(at_response_t httpReadResp)
*
* @brief 读取http下载的数据
*
* @param none
*
* @return none
****************************************************************************************************/
static void http_read_func(at_response_t httpReadResp)
{
 rt_bool_t bIsHaveData = RT_FALSE;
 rt_uint16_t u16Temp ,i;
 const char *line_buffer = RT_NULL;
 char *httpReadBuf = RT_NULL;
 
 if (httpReadResp == RT_NULL || httpReadResp->line_counts < 4)
 {
 return;
 }
 httpReadBuf = rt_malloc(HTTP_SIZE_PER_PKT);
 if (httpReadBuf == RT_NULL)
 {
 rt_kprintf("http_read_func out of memory!! ");
 }

if ((http_size_bytes - http_size_conts * HTTP_SIZE_PER_PKT) >= HTTP_SIZE_PER_PKT)
    {
        u16Temp = HTTP_SIZE_PER_PKT;
    }
    else
    {
        u16Temp = http_size_bytes - http_size_conts * HTTP_SIZE_PER_PKT;
    }

rt_kprintf("The max lines is %d size is %d ", httpReadResp->line_counts, httpReadResp->buf_len);

for (rt_size_t line_num = 1; line_num <= httpReadResp->line_counts; line_num++)
 {
 if((line_buffer = at_resp_get_line(httpReadResp, line_num)) != RT_NULL)
 {
 //找到数据区的前一行
 if(strstr(line_buffer, "+HTTPREAD:"))
 {
 //找到数据区的首行
 if((line_buffer = at_resp_get_line(httpReadResp, line_num + 1)) != RT_NULL)
 {
 bIsHaveData = RT_TRUE;
 break;
 }

}
 //rt_kprintf("line %d %02x %02x %02x %02x ", line_num, line_buffer[0],line_buffer[1],line_buffer[2],line_buffer[3]);
 }
 }
 
 
 if (httpReadResp->line_counts > 4)
 {
 for (i = 0; i < u16Temp; i++)
 {
 if (line_buffer* == 0x0D && line_buffer[i + 1] == 0x00)
 {
 httpReadBuf[i++] = 0x0D;
 httpReadBuf* = 0x0A;
 
 }
 else
 {
 httpReadBuf* = line_buffer*;
 }
 }
 }

if (bIsHaveData)
 {
 if (httpReadResp->line_counts > 4 )
 {
 hw_upgrade_data_save((rt_uint8_t *)httpReadBuf, u16Temp);
 }
 else
 {
 hw_upgrade_data_save((rt_uint8_t *)line_buffer, u16Temp);
 }
 }
 
 //判断是否下载完成
 if (http_size_conts >= http_size_conts_max)
 {
 //系统重启
 air_cur_status = HTTP_TERM;
 rt_kprintf("System now will restart...u16UdpCrc value is 0x%04x ", u16UdpCrc);
 
 hw_upgrade_crc_check();
 /* wait some time */
 rt_thread_delay(500);
 rt_hw_cpu_reset();
 rt_thread_delay(500);
 }
 else
 {
 air_cur_status = HTTP_READ_DATA;
 }
 
 rt_free(httpReadBuf);
}

注：这里遇到不少问题。
A. 不能用urc函数获取{"+HTTPREAD", " ", urc_http_read_func}. 因为没有结束符。
B. 想用at_client_recv代替at_exec_cmd和at_create_resp函数来读数据。老返回失败
C. 后面在AT_Client中找了，没有合适函数还是用at_exec_cmd和at_create_resp. 这里我通过每条数据包校验打印才发现。at_create_resp以行为单位读取数据，会把文件中的0x0D 0x0A转换成0x0D 0x00。 现在我是做了判断，把数据反转回来。暂时可以这样做，升级没有问题。
**********D.没用采用ota_http升级中的函数，或许会更容易，我是为了减少源码大小。*****
*****E期间，我还自己写了C#代码来计算校验值，看是哪个包出错啦。
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在此要感谢以下两位的帮助：面码1314 发表于 2020-4-12 18:07  小小李sunny 发表于 2020-4-12 22:07
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