/// <summary>
/// Reads the current value of the <see cref="Pca9685Register.Mode2"/> register.
/// </summary>
/// <returns>Bit flags corresponding to the actual mode byte.</returns>
public Pca9685Mode2Bits ReadMode2()
{
// Read register
var value = (Pca9685Mode2Bits)I2cExtensions.WriteReadByte(_hardware, (byte)Pca9685Register.Mode2);
// Update property
Mode2Register = value;
// Return result
return(value);
}
/// <summary>
/// Reads a single byte "randomly" at the specified address.
/// </summary>
public byte ReadByte(int address)
{
// Validate
if (address < 0 || address > Size - 1)
{
throw new ArgumentOutOfRangeException(nameof(address));
}
// Get correct I2C device and data for memory address and flags
var device = GetI2cDeviceForMemoryAddress(address);
var addressBytes = GetMemoryAddressBytes(address);
// Read and return data
return(I2cExtensions.WriteReadByte(device, addressBytes));
}
/// <summary>
/// Reads the prescale register and calculates the <see cref="Frequency"/> (and related properties)
/// based on <see cref="ClockSpeed"/>.
/// </summary>
/// <returns>
/// Frequency in Hz. Related properties are also updated.
/// </returns>
public int ReadFrequency()
{
// Read prescale register
var prescale = I2cExtensions.WriteReadByte(_hardware, (byte)Pca9685Register.Prescale);
// Calculate frequency
var frequency = CalculateFrequency(prescale, ClockSpeed);
// Update related properties
Frequency = frequency;
PwmMsMinimum = Pca9685ChannelValue.CalculateWidthMs(frequency, 0);
PwmMsMaximum = Pca9685ChannelValue.CalculateWidthMs(frequency, Pca9685ChannelValue.Maximum);
// Return result
return(frequency);
}