private bool[] readTemperatureIntoBoolArray() {
bool[] response = new bool[8];
while (_data.Read()) ;
clock(true);
bool ack = false; //_data.Read();
clock(false);
if (ack) ErrorPrint("Communication failure when trying to read temperature.");
// Read first byte in
for (short i = 0; i < 8; i++)
{
response[i] = _data.Read();
clock(true);
clock(false);
}
return response;
}
// this relies on argument checking already being done in WriteRead
private void DoManagedWriteRead(byte address, byte[] writeBuffer, int writeOffset, int writeLength, byte[] readBuffer, int readOffset, int readLength, out int numWritten, out int numRead)
{
lock (sdaPort)
{
lock (SoftwareI2CTimeoutList)
{
timeout = false;
timeoutCount = 0; // Enable timeout checking for this port
}
numWritten = 0;
numRead = 0;
if (writeLength != 0)
{
// The clock pin should be pulled high - if not, there is a short on the bus
// or a nonresponsive device, etc.
if (!sclPort.Read())
{
throw new ApplicationException("Software I2C: clock signal on socket " + socket + " is being held low.");
}
// Generate the start pulse
sdaPort.Mode = IOMode.Output;
sclPort.Mode = IOMode.Output;
// Write the address and data bytes to the device (low order address bit is 0 for write)
if (WriteByte((byte)(address << 1)))
{
for (int index = writeOffset; index < writeOffset + writeLength; index++)
{
if (!WriteByte(writeBuffer[index]))
{
break;
}
numWritten++;
}
}
if (readLength == 0 || numWritten != writeLength)
{
// send stop pulse if not reading, or if write failed
sclPort.Mode = IOMode.Input; // Allow clock pin to float high
while (!sclPort.Read() && !timeout)
{
; // Wait for the clock pin to go high
}
sdaPort.Mode = IOMode.Input; // Allow data pin to float high
}
else
{
// set up for repeated start condition;
sdaPort.Mode = IOMode.Input;
while (!sdaPort.Read() && !timeout)
{
;
}
sclPort.Mode = IOMode.Input;
}
}
if (timeout)
{
throw new ApplicationException("Software I2C: clock signal on socket " + socket + " is being held low.");
}
if (numWritten == writeLength && readLength != 0)
{
int limit = (readOffset + readLength) - 1;
// The clock pin should be pulled high
// If it is not, the bus is shorted or a device is nonresponsive
if (!sclPort.Read())
{
throw new ApplicationException("Software I2C: clock signal on socket " + socket + " is being held low.");
}
// Generate the start pulse
sdaPort.Mode = IOMode.Output;
sclPort.Mode = IOMode.Output;
// Write the address and then read the data bytes from the device (low order address bit is 1 for read)
if (WriteByte((byte)((address << 1) | 1)))
{
int lastIndex = readOffset + readLength - 1;
for (int index = readOffset; index < readOffset + readLength; index++)
{
if (!ReadByte(index == lastIndex, out readBuffer[index]))
{
break;
}
numRead++;
}
}
// Generate the stop pulse
sclPort.Mode = IOMode.Input; // Release the clock line
while (!sclPort.Read() & !timeout)
{
; // Wait for the clock line to go high
}
sdaPort.Mode = IOMode.Input; // Release the data line
}
if (timeout)
{
throw new ApplicationException("Software I2C: clock signal on socket " + socket + " is being held low.");
}
lock (SoftwareI2CTimeoutList)
{
timeoutCount = -1; // Disable timeout checking for this port
}
}
}