/// <summary>
/// Send a command to the the display controller along with parameters.
/// </summary>
/// <param name="command">Command to send.</param>
/// <param name="data">Span to send as parameters for the command.</param>
private void SendCommand(Ssd1351Command command, Span <byte> data)
{
Span <byte> commandSpan = stackalloc byte[]
{
(byte)command
};
SendSPI(commandSpan, true);
if (data != null && data.Length > 0)
{
SendSPI(data);
// detect certain commands that may alter the state of the device. This is done as the
// SPI device cannot read registers from the ssd1351 and so changes need to be captured
switch (command)
{
// capture changes to the colour depth and colour sequence
case Ssd1351Command.SetRemap:
_colorSequence = (ColorSequence)((data[0] >> 2) & 0x01);
_colorDepth = (ColorDepth)((data[0] >> 6) & 0x03);
break;
}
}
}
/// <summary>
/// Send a command to the the display controller along with associated parameters.
/// </summary>
/// <param name="command">Command to send.</param>
/// <param name="commandParameters">parameteters for the command to be sent</param>
private void SendCommand(Ssd1351Command command, params byte[] commandParameters)
{
Span <byte> paramSpan = stackalloc byte[commandParameters.Length];
for (int i = 0; i < commandParameters.Length; paramSpan[i] = commandParameters[i], i++)
{
}
SendCommand(command, paramSpan);
}
