// start cond. + slave addr (rd) + read bytes (Cnt), no stop cond.
public static bool ReadBytes(byte Addr, byte Cnt)
{
int BytesRead = 0, i;
if (I2c.StartCond((byte)(Addr + 1)) == true)
{
bWrBuffer[0] = (byte)(0x80 + Cnt - 1);
ComPort._serialPort.DiscardInBuffer();
ComPort._serialPort.Write(bWrBuffer, 0, 1);
for (i = 0; i < 10; i++)
{
BytesRead += ComPort._serialPort.Read(bRdBuffer, BytesRead, Cnt);
if (BytesRead == Cnt)
{
break;
}
}
if (i == 10)
{
return(false);
}
else
{
return(true);
}
}
else
{
return(false);
}
}
// start cond. + slave addr (wr) + write bytes (bTxCnt), no stop cond.
public static bool WriteBytes(byte Addr, String TxbTxData)
{
byte[] Ack = new byte[1];
byte I, K;
Byte bTxCnt;
Byte bTxCnt1;
bool ack;
string Log = "";
if (TxbTxData == "")
{
return(true);
}
Ack[0] = 0xff;
ComPort._serialPort.DiscardInBuffer();
ack = I2c.StartCond(Addr);
if (ack == true)
{
bTxCnt1 = (Byte)TxbTxData.Length;
bTxCnt = 0;
K = 1;
for (I = 0; I < bTxCnt1; I++)
{
if (TxbTxData[I] != ' ')
{
bTxCnt++;
if ((Byte)TxbTxData[I] < 0x3a)
{
I2c.bWrBuffer[K] = (Byte)((TxbTxData[I++] - 0x30) * 16);
if ((Byte)TxbTxData[I] < 0x3a)
{
I2c.bWrBuffer[K++] += (Byte)(TxbTxData[I] - 0x30);
}
else
{
I2c.bWrBuffer[K++] += (Byte)(TxbTxData[I] - 0x57);
}
}
else
{
I2c.bWrBuffer[K] = (Byte)((TxbTxData[I++] - 0x57) * 16);
if ((Byte)TxbTxData[I] < 0x3a)
{
I2c.bWrBuffer[K++] += (Byte)(TxbTxData[I] - 0x30);
}
else
{
I2c.bWrBuffer[K++] += (Byte)(TxbTxData[I] - 0x57);
}
}
}
}
bWrBuffer[0] = (byte)(0xc0 + bTxCnt - 1);
ComPort._serialPort.Write(bWrBuffer, 0, bTxCnt + 1);
ComPort._serialPort.Read(Ack, 0, 1);
if (Ack[0] == 0x31) // "1" bei Ack, "0" bei Nack
{
ack = true;
}
else
{
ack = false;
}
}
if (LogOn == true)
{
fs = new FileStream("I2cDriver2.log", FileMode.Append);
sw = new StreamWriter(fs);
Log = "Wr: " + TxbTxData + " ";
if (ack == true)
{
Log += "ACK";
}
else
{
Log += "NACK";
}
sw.WriteLine(Log);
LogCounter++;
sw.Close();
fs.Close();
}
return(ack);
}
