private byte[] ReadFromDevice(ISPIPeripheral device, int count)
{
var result = new byte[count];
for (var i = 0; i < result.Length; i++)
{
// send a dummy byte
result[i] = device.Transmit(0);
}
return(result);
}
private bool HandleCommand(IPCommandDescriptor cmd, ISPIPeripheral device)
{
var result = true;
parent.Log(LogLevel.Debug, "About to execute command {0}", cmd);
switch (cmd.Command)
{
case IPCommand.TransmitCommand_SDR:
device.Transmit(cmd.Operand);
break;
case IPCommand.ReceiveReadData_SDR:
{
var dataCount = (parent.dataSize.Value == 0)
? cmd.Operand
: parent.dataSize.Value;
var data = ReadFromDevice(device, (int)dataCount);
var count = parent.rxQueue.Enqueue(data);
if (count != data.Length)
{
parent.Log(LogLevel.Warning, "There is no more space left in the RX queue. {0} bytes were dropped", data.Length - count);
}
}
break;
case IPCommand.Stop:
{
device.FinishTransmission();
parent.ipCommandDone.Value = true;
parent.UpdateInterrupts();
}
break;
case IPCommand.TransmitProgrammingData_SDR:
{
parent.isInTransmit = true;
// note: parent operation breaks execution of the command
// waiting for the data to be written to FIFO
result = false;
}
break;
case IPCommand.TransmitRowAddress_SDR:
{
var a0 = (byte)(parent.serialFlashAddress.Value);
var a1 = (byte)(parent.serialFlashAddress.Value >> 8);
var a2 = (byte)(parent.serialFlashAddress.Value >> 16);
device.Transmit(a2);
device.Transmit(a1);
device.Transmit(a0);
}
break;
default:
parent.Log(LogLevel.Info, "Unsupported IP command: {0}", cmd);
break;
}
return(result);
}