public void Close()
{
if (comn != null)
{
comn.DataReceived -= this.comn_DataReceived;
}
start = false;
transmitState = YmodeSendState.WAIT_START;
transmittingYmodem = false;
pktSize = 0;
resSize = 0;
blkNumber = 0;
ackReceived = false;
errors = 0;
fsFWSent = false;
fileBytes = null;
fileName = null;
fileIndex = 0;
lastRec = 0;
}
private void timConnect_Tick(object state)
{
while (true)
{
Thread.Sleep(200);
if (start)
{
if (!transmittingYmodem)
{
if (tickNum++ > 15)
{
transmitState = YmodeSendState.WAIT_START;
pktSize = 0;
resSize = 0;
blkNumber = 0;
ackReceived = false;
errors = 0;
fsFWSent = false;
fileIndex = 0;
lastRec = 0;
YmodeStateChanged?.Invoke(11, "请断电，重连设备...");
tickNum = 1;
}
}
else
{
tickNum = 1;
bool next = recData.Count > 0;
while (next)
{
next = Ymodem_Transmit() == 0 && recData.Count > 0;
}
}
}
}
}
/**
* @brief Transmit a file using the ymodem protocol
* @param
* @retval
*/
private byte Ymodem_Transmit()
{
byte i;
bool CRC16_F = true;
byte c;
ackReceived = false; //默认
c = ReadNextByte();
//先判断是否结束传输或改变状态
switch (transmitState)
{
case YmodeSendState.WAIT_START:
if (c == CRC16)
{
ackReceived = true;
YmodeResponseGot?.Invoke("\n\r The file is being sent ...\n\r");
YmodeStateChanged?.Invoke(13, "发送文件信息");
lastState = transmitState;
transmitState = YmodeSendState.SEND_FILENAME; //开始发送文件名及其大小
}
break;
case YmodeSendState.SEND_FILENAME:
if (c == ACK)
{
YmodeStateChanged?.Invoke(13, "文件信息确认");
lastState = transmitState;
}
else
{
if (c == CRC16)
{
if (lastState == YmodeSendState.SEND_FILENAME && lastRec == ACK)
{
ackReceived = true;
YmodeStateChanged?.Invoke(13, "开始发送文件");
transmitState = YmodeSendState.SEND_DATA; //开始发送文件内容
}
else
{
errors++;
if (errors > 10)
{
ackReceived = true;
}
}
}
}
break;
case YmodeSendState.SEND_DATA:
if (c == ACK)
{
ackReceived = true;
YmodeProgressUpdated?.Invoke(fileIndex);
if (fsFWSent)
{
transmitState = YmodeSendState.SEND_EOT; //当前文件内容发送完毕
}
}
break;
case YmodeSendState.SEND_EOT:
if (c == ACK)
{
lastState = transmitState;
transmitState = YmodeSendState.SEND_LASTPACK;
}
break;
case YmodeSendState.SEND_LASTPACK:
if (c == CRC16 && lastState == YmodeSendState.SEND_EOT && lastRec == ACK)
{
ackReceived = true;
}
else if (c == ACK)
{
start = false;
transmittingYmodem = false; //结束Ymodem发送
//通知“固件升级”子窗口固件升级成功
//rMainform.ReportFwUpdateResult("Succeed");
YmodeProgressFinished?.Invoke("Succeed");
YmodeStateChanged?.Invoke(14, "文件发送成功");
return(1); //直接返回，然后可以发送APP代码的CRC16值
}
break;
case YmodeSendState.SEND_CA:
if (c == ACK)
{
ackReceived = true;
transmittingYmodem = false; //结束Ymodem发送
return(0);
}
break;
default:
break;
}
lastRec = c;
if (c == CA)
{
if (ReadNextByte() == CA) //连续两次读到CA
{
transmittingYmodem = false;
YmodeStateChanged?.Invoke(11, "发送失败，请重试...");
return(0xFF); /* error */
}
}
//根据新状态来判断是否要准备新数据包
switch (transmitState)
{
case YmodeSendState.SEND_FILENAME:
if (ackReceived) //下位机等待数据包下位机接收成功
{
errors = 0; //清零出错计数
// Here 128 bytes package is used
pktSize = PACKET_SIZE;
// Prepare first block，对应数据包序号为0
Ymodem_PrepareIntialPacket(ref packet_data, fileName, (uint)fileBytes.Length);
fsFWSent = false;
resSize = (uint)fileBytes.Length;
fileIndex = 0;
blkNumber = 1; //接下来发送第1个数据包
}
else
{
errors++;
}
break;
case YmodeSendState.SEND_DATA:
if (ackReceived) //上次数据包下位机接收成功
{
errors = 0; //清零出错计数
// Prepare next packet
Ymodem_PreparePacket(ref packet_data, blkNumber, resSize);
/*
* //修改第一个数据包，加入CRC值和文件长度
* if (blkNumber == 1)
* {
* UInt16 crc = CalcFileCRC16(ref fiFW);
* }
*/
if (resSize >= PACKET_1K_SIZE) //剩余字节数大于等于1024
{
// Here 1024 bytes package is used to send the packets
pktSize = PACKET_1K_SIZE;
}
else if (resSize > PACKET_SIZE) //剩余字节数大于128且小于1024
{
pktSize = PACKET_1K_SIZE;
}
else //剩余字节数小于等于128,且大于0
{
pktSize = PACKET_SIZE;
}
if (resSize > PACKET_1K_SIZE) //判断是否还有数据包需要发送
{
resSize -= PACKET_1K_SIZE;
if (blkNumber > (fileBytes.Length / 1024)) //发送的数据包数量不能超出数据包总数量
{
transmittingYmodem = false;
return(0xFF); // error
}
else
{
blkNumber++;
}
}
else
{
blkNumber++;
resSize = 0;
fsFWSent = true; //文件数据发送完毕，准备进入下一状态
}
}
else
{
errors++;
}
break;
case YmodeSendState.SEND_LASTPACK: //发送序号为0的空数据包，结束文件传输
if (ackReceived) //上次数据包发送成功
{
errors = 0;
// Last packet preparation
packet_data[0] = SOH;
packet_data[1] = 0;
packet_data[2] = 0xFF;
for (i = PACKET_HEADER; i < (PACKET_SIZE + PACKET_HEADER); i++)
{
packet_data[i] = 0x00;
}
pktSize = PACKET_SIZE;
}
break;
case YmodeSendState.SEND_EOT:
case YmodeSendState.SEND_CA:
if (ackReceived) //上次数据包发送成功
{
errors = 0;
}
else
{
errors++;
}
break;
default:
break;
}
if (errors >= 0xFF)
{
transmittingYmodem = false;
//通知“固件升级”子窗口固件升级失败
//rMainform.ReportFwUpdateResult("Fail");
YmodeProgressFinished?.Invoke("Fail");
YmodeStateChanged?.Invoke(11, "发送失败...");
return(errors);
}
else //发送上次的数据包或新数据包
{
if ((transmitState == YmodeSendState.SEND_FILENAME) ||
(transmitState == YmodeSendState.SEND_DATA) ||
(transmitState == YmodeSendState.SEND_LASTPACK))
{
bool send = false;
if (transmitState == YmodeSendState.SEND_FILENAME && ackReceived)
{
send = true;
System.Diagnostics.Debug.WriteLine("发送文件名大小");
}
else if (transmitState == YmodeSendState.SEND_DATA && ackReceived)
{
send = true;
System.Diagnostics.Debug.WriteLine("发送文件内容:" + (blkNumber - 1));
}
else if (transmitState == YmodeSendState.SEND_LASTPACK && ackReceived)
{
send = true;
System.Diagnostics.Debug.WriteLine("发送最后空数据");
}
if (send) //新数据包待发送，重新计算校验值
{
// Send CRC or CheckSum based on CRC16_F
if (CRC16_F)
{
packCRC = Cal_CRC16(ref packet_data, 3, pktSize); //前3个数据不包含在CRC计算范围内
}
else
{
packCheckSum = CalChecksum(ref packet_data, 3, pktSize); //前3个数据不包含在CRC计算范围内
}
//send packet
try
{
System.Diagnostics.Debug.WriteLine("CRC16:" + packCRC);
int len = pktSize + PACKET_HEADER;
// Send CRC or CheckSum based on CRC16_F
if (CRC16_F)
{
packet_data[len] = (byte)(packCRC >> 8);
packet_data[len + 1] = (byte)(packCRC & 0xFF);
len += 2;
}
else
{
packet_data[len] = packCheckSum;
len += 1;
}
comn.Write(packet_data, 0, len);
ackReceived = false; //在接收事件处理函数中判断是否发送成功
}
catch (Exception e)
{
transmittingYmodem = false;
DataSendFailed?.Invoke();
YmodeStateChanged?.Invoke(11, "串口通信错误");
return(0xFF); /* error */
}
}
}
else if (transmitState == YmodeSendState.SEND_EOT) //send EOT
{
try
{
if (ackReceived)
{
comn.Write(new[] { EOT }, 0, 1);
ackReceived = false; //在接收事件处理函数中判断是否发送成功
System.Diagnostics.Debug.WriteLine("发送EOT");
}
}
catch (Exception e)
{
transmittingYmodem = false;
YmodeStateChanged?.Invoke(11, "串口通信错误");
return(0xFF); // error
}
}
}
return(0); /* packet trasmitted successfully */
}