/// <summary>
/// Returns the number of bytes that the variable takes.
/// </summary>
private byte getVariableBytes(VariableId variableId)
{
switch (variableId)
{
case VariableId.TARGET_VCC_ALLOWED_MINIMUM:
case VariableId.TARGET_VCC_ALLOWED_MAXIMUM_RANGE:
case VariableId.TARGET_VCC_MEASURED_MINIMUM:
case VariableId.TARGET_VCC_MEASURED_MAXIMUM:
case VariableId.PROGRAMMING_ERROR:
case VariableId.LINE_A_IDENTITY:
case VariableId.LINE_B_IDENTITY:
case VariableId.SLOSCOPE_STATE:
case VariableId.SW_MINOR:
case VariableId.SW_MAJOR:
case VariableId.HW_VER:
case VariableId.SCK_DURATION:
return(1);
case VariableId.FVR_ADC:
case VariableId.SLOSCOPE_OUTPUT_STATE:
return(2);
default: throw new Exception("Unrecognized variabledId " + variableId.ToString());
}
}
private unsafe ushort getVariable(VariableId variableId)
{
byte bytes = getVariableBytes(variableId);
ushort value = 0;
byte[] array = new byte[bytes];
try
{
controlTransfer(0xC0, 0x81, 0, (ushort)variableId, array);
}
catch (Exception e)
{
throw new Exception("There was an error getting variable " + variableId.ToString() + " from the device.", e);
}
if (bytes == 1)
{
// read a single byte
fixed(byte *pointer = array)
{
value = *(byte *)pointer;
}
}
else
{
// read two bytes
fixed(byte *pointer = array)
{
value = *(ushort *)pointer;
}
}
return(value);
}
private void setVariable(VariableId variableId, ushort value)
{
try
{
controlTransfer(0x40, 0x82, value, (ushort)variableId);
}
catch (Exception e)
{
throw new Exception("There was an error setting variable " + variableId.ToString() + " on the device.", e);
}
}
private void setVariable(VariableId variableId, ushort value)
{
try
{
controlTransfer(0x40, 0x82, value, (ushort)variableId);
}
catch (Exception e)
{
throw new Exception("There was an error setting variable " + variableId.ToString() + " on the device.", e);
}
}
/// <summary>
/// Returns the number of bytes that the variable takes.
/// </summary>
private byte getVariableBytes(VariableId variableId)
{
switch (variableId)
{
case VariableId.TARGET_VCC_ALLOWED_MINIMUM:
case VariableId.TARGET_VCC_ALLOWED_MAXIMUM_RANGE:
case VariableId.TARGET_VCC_MEASURED_MINIMUM:
case VariableId.TARGET_VCC_MEASURED_MAXIMUM:
case VariableId.PROGRAMMING_ERROR:
case VariableId.LINE_A_IDENTITY:
case VariableId.LINE_B_IDENTITY:
case VariableId.SLOSCOPE_STATE:
case VariableId.SW_MINOR:
case VariableId.SW_MAJOR:
case VariableId.HW_VER:
case VariableId.SCK_DURATION:
return 1;
case VariableId.FVR_ADC:
case VariableId.SLOSCOPE_OUTPUT_STATE:
return 2;
default: throw new Exception("Unrecognized variabledId " + variableId.ToString());
}
}
private unsafe ushort getVariable(VariableId variableId)
{
byte bytes = getVariableBytes(variableId);
ushort value = 0;
byte[] array = new byte[bytes];
try
{
controlTransfer(0xC0, 0x81, 0, (ushort)variableId, array);
}
catch (Exception e)
{
throw new Exception("There was an error getting variable " + variableId.ToString() + " from the device.", e);
}
if (bytes == 1)
{
// read a single byte
fixed (byte* pointer = array)
{
value = *(byte*)pointer;
}
}
else
{
// read two bytes
fixed (byte* pointer = array)
{
value = *(ushort*)pointer;
}
}
return value;
}