linux ymodem串口发送

常规C/C++编程

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开发语言：C/C++
实例大小：0.03M
下载次数：22
浏览次数：1046
发布时间：2019-08-01
实例类别：常规C/C++编程
发布人：georegji
文件格式：.c
所需积分：4

实例介绍

【实例简介】
【实例截图】
【核心代码】

uint8_t Ymodem_Transmit (uint8_t *buf, const uint8_t* sendFileName, uint32_t sizeFile)
{

uint8_t packet_data[PACKET_1KB_SIZE PACKET_OVERHEAD];
uint8_t FileName[FILE_NAME_LENGTH];
uint8_t *buf_ptr, tempCheckSum ;
uint16_t tempCRC, blkNumber;
uint8_t receivedC[2], CRC16_F = 0, i;
uint32_t errors, ackReceived, size = 0, pktSize;

errors = 0;
ackReceived = 0;
for (i = 0; i < (FILE_NAME_LENGTH - 1); i )
{
FileName[i] = sendFileName[i];
}

printf("FileName = %s\n", FileName);

CRC16_F = 1;

/* Prepare first block */
Ymodem_PrepareIntialPacket(&packet_data[0], FileName, &sizeFile);
    /* Send Packet */
   Ymodem_SendPacket(packet_data, PACKET_128B_SIZE PACKET_HEADER);
    /* Send CRC or Check Sum based on CRC16_F */
    if (CRC16_F)
    {
       tempCRC = Cal_CRC16(&packet_data[3], PACKET_128B_SIZE);
       Send_Byte(tempCRC >> 8);
       Send_Byte(tempCRC & 0xFF);
    }
    else
    {
       tempCheckSum = CalChecksum (&packet_data[3], PACKET_128B_SIZE);
       Send_Byte(tempCheckSum);
    }

while(1)
{
  printf("<----wait ack A1\n");
  Receive_Byte(&receivedC[0], 10000);
  if (receivedC[0] == ACK)
        {
        printf("<----first ack A1\n");
   break;
  }else{
   printf("<----no ack A1\n");
  }
}
while(1)
{
  printf("<----wait second C\n");
  Receive_Byte(&receivedC[0], 10000);
  if (receivedC[0] == modem_c)
  {
    printf("<----got second C A1\n");
    break;
  }else{
    printf("<----no second C A1\n");
  }
}

printf("<----A1\n");

buf_ptr = buf;
size = sizeFile;
blkNumber = 0x01;
/* Here 1024 bytes package is used to send the packets */

/* Resend packet if NAK for a count of 10 else end of commuincation */
while (size)
{
    /* Prepare next packet */
    Ymodem_PreparePacket(buf_ptr, &packet_data[0], blkNumber, size);
    ackReceived = 0;
    receivedC[0]= 0;
    errors = 0;

      /* Send next packet */
      if (size >= PACKET_1KB_SIZE)
      {
        pktSize = PACKET_1KB_SIZE;

      }
      else
      {
        pktSize = PACKET_128B_SIZE;
      }
      Ymodem_SendPacket(packet_data, pktSize PACKET_HEADER);
      /* Send CRC or Check Sum based on CRC16_F */
      /* Send CRC or Check Sum based on CRC16_F */
      if (CRC16_F)
      {
         tempCRC = Cal_CRC16(&packet_data[3], pktSize);
         Send_Byte(tempCRC >> 8);
         Send_Byte(tempCRC & 0xFF);
      }
      else
      {
        tempCheckSum = CalChecksum (&packet_data[3], pktSize);
        Send_Byte(tempCheckSum);
      }

   while(1)
{
  printf("<----wait ack A2\n");
  Receive_Byte(&receivedC[0], 10000);
  if (receivedC[0] == ACK)
        {
        printf("<----data ack A1\n");
   break;
  }else{
   printf("<----no ack A1\n");
  }
   }
      if (size > pktSize)
        {
           buf_ptr = pktSize;
           size -= pktSize;
           blkNumber ;

        }
        else
        {
          buf_ptr = pktSize;
          size = 0;
        }
  printf("left %d bytes \n", size);


}

printf("<----A2\n");
ackReceived = 0;
receivedC[0] = 0x00;
errors = 0;

Send_Byte(EOT);
if (Receive_Byte(&receivedC[0], 10000) == 0)
{
      if (receivedC[0] == ACK)
      {
        /* Packet transfered correctly */
        ackReceived = 1;

printf("<----got eot ack \n");
}
}

printf("<----A3\n");
/* Last packet preparation */
ackReceived = 0;
receivedC[0] = 0x00;
errors = 0;

packet_data[0] = SOH;
packet_data[1] = 0;
packet_data [2] = 0xFF;

for (i = PACKET_HEADER; i < (PACKET_128B_SIZE PACKET_HEADER); i )
{
     packet_data [i] = 0x00;
}
/* Send Packet */
Ymodem_SendPacket(packet_data, PACKET_128B_SIZE PACKET_HEADER);
/* Send CRC or Check Sum based on CRC16_F */
tempCRC = Cal_CRC16(&packet_data[3], PACKET_128B_SIZE);
Send_Byte(tempCRC >> 8);
Send_Byte(tempCRC & 0xFF);

    /* Wait for Ack and 'C' */
   if (Receive_Byte(&receivedC[0], 10000) == 0)
    {
      if (receivedC[0] == ACK)
      {
        /* Packet transfered correctly */
        ackReceived = 1;
      }
    }

printf("<----A4\n");
Send_Byte(EOT);
/* Send (EOT); */
/* Wait for Ack */
if ((Receive_Byte(&receivedC[0], 10000) == 0) && receivedC[0] == ACK)
{
ackReceived = 1;
}

printf("<----A5\n");
return 0; /* file trasmitted successfully */
}

标签： linux 发送串口

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