IAP疑问

grant · 发表于 2012-7-6 14:49:27

今天在弄个IAP出现卡死。输入1之后就这样

我就查输入1的程序
void SerialDownload(void)
{
uint8_t Number[10] = " ";
int32_t Size = 0;

SerialPutString("Waiting for the file to be sent ... (press 'a' to abort)\n\r");
Size = Ymodem_Receive(&tab_1024[0]);
if (Size > 0)
{
    SerialPutString("\n\n\r Programming Completed Successfully!\n\r--------------------------------\r\n Name: ");
    SerialPutString(file_name);
    Int2Str(Number, Size);
    SerialPutString("\n\r Size: ");
    SerialPutString(Number);
    SerialPutString(" Bytes\r\n");
    SerialPutString("-------------------\n");
}
else if (Size == -1)
{
    SerialPutString("\n\n\rThe image size is higher than the allowed space memory!\n\r");
}
else if (Size == -2)
{
    SerialPutString("\n\n\rVerification failed!\n\r");
}
else if (Size == -3)
{
    SerialPutString("\r\n\nAborted by user.\n\r");
}
else
{
    SerialPutString("\n\rFailed to receive the file!\n\r");
}
}

其中这句Size = Ymodem_Receive(&tab_1024[0]);
这个数组tab_1024都是空的，所以才没有动？
到底哪里问题？
int32_t Ymodem_Receive (uint8_t *buf)
{
uint8_t packet_data[PACKET_1K_SIZE + PACKET_OVERHEAD], file_size[FILE_SIZE_LENGTH], *file_ptr, *buf_ptr;
int32_t i, j, packet_length, session_done, file_done, packets_received, errors, session_begin, size = 0;

/* Initialize FlashDestination variable */
FlashDestination = ApplicationAddress;

for (session_done = 0, errors = 0, session_begin = 0; ;)
{
    for (packets_received = 0, file_done = 0, buf_ptr = buf; ;)
    {
      switch (Receive_Packet(packet_data, &packet_length, NAK_TIMEOUT))
      {
        case 0:
          errors = 0;
          switch (packet_length)
          {
              /* Abort by sender */
            case - 1:
              Send_Byte(ACK);
              return 0;
              /* End of transmission */
            case 0:
              Send_Byte(ACK);
              file_done = 1;
              break;
              /* Normal packet */
            default:
              if ((packet_data[PACKET_SEQNO_INDEX] & 0xff) != (packets_received & 0xff))
              {
                Send_Byte(NAK);
              }
              else
              {
                if (packets_received == 0)
                {/* Filename packet */
                  if (packet_data[PACKET_HEADER] != 0)
                  {/* Filename packet has valid data */
                    for (i = 0, file_ptr = packet_data + PACKET_HEADER; (*file_ptr != 0) && (i < FILE_NAME_LENGTH);)
                    {
                      file_name[i++] = *file_ptr++;
                    }
                    file_name[i++] = '\0';
                    for (i = 0, file_ptr ++; (*file_ptr != ' ') && (i < FILE_SIZE_LENGTH);)
                    {
                      file_size[i++] = *file_ptr++;
                    }
                    file_size[i++] = '\0';
                    Str2Int(file_size, &size);
                    /* Test the size of the image to be sent */
                    /* Image size is greater than Flash size */
                    if (size > (FLASH_SIZE - 1))
                    {
                      /* End session */
                      Send_Byte(CA);
                      Send_Byte(CA);
                      return -1;
                    }
                    /* Erase the needed pages where the user application will be loaded */
                    /* Define the number of page to be erased */
                    NbrOfPage = FLASH_PagesMask(size);
                    /* Erase the FLASH pages */
                    for (EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++)
                    {
                      FLASHStatus = FLASH_ErasePage(FlashDestination + (PageSize * EraseCounter));
                    }
                    Send_Byte(ACK);
                    Send_Byte(CRC16);
                  }
                  /* Filename packet is empty, end session */
                  else
                  {
                    Send_Byte(ACK);
                    file_done = 1;
                    session_done = 1;
                    break;
                  }
                }
                /* Data packet */
                else
                {
                  memcpy(buf_ptr, packet_data + PACKET_HEADER, packet_length);
                  RamSource = (uint32_t)buf;
                  for (j = 0;(j < packet_length) && (FlashDestination < ApplicationAddress + size);j += 4)
                  {
                    /* Program the data received into STM32F10x Flash */
                    FLASH_ProgramWord(FlashDestination, *(uint32_t*)RamSource);
                    if (*(uint32_t*)FlashDestination != *(uint32_t*)RamSource)
                    {
                      /* End session */
                      Send_Byte(CA);
                      Send_Byte(CA);
                      return -2;
                    }
                    FlashDestination += 4;
                    RamSource += 4;
                  }
                  Send_Byte(ACK);
                }
                packets_received ++;
                session_begin = 1;
              }
          }
          break;
        case 1:
          Send_Byte(CA);
          Send_Byte(CA);
          return -3;
        default:
          if (session_begin > 0)
          {
            errors ++;
          }
          if (errors > MAX_ERRORS)
          {
            Send_Byte(CA);
            Send_Byte(CA);
            return 0;
          }
          Send_Byte(CRC16);
          break;
      }
      if (file_done != 0)
      {
        break;
      }
    }
    if (session_done != 0)
    {
      break;
    }
}
return (int32_t)size;
}