internal HardwareInstance(Microsoft.SPOT.Hardware.SPI.SPI_module module)
{
Sharing = Socket.SocketInterfaces.SpiSharing.Shared;
Users = 0;
Module = module;
}
internal HardwareInstance(Hardware.SPI.SPI_module module)
{
Sharing = SpiSharing.Shared;
Users = 0;
Module = module;
}
internal HardwareInstance(Hardware.SPI.SPI_module module)
{
Sharing = SpiSharing.Shared;
Users = 0;
Module = module;
}
internal HardwareInstance(Microsoft.SPOT.Hardware.SPI.SPI_module module)
{
Sharing = Socket.SocketInterfaces.SpiSharing.Shared;
Users = 0;
Module = module;
}
private SPIInstance(Socket socket, Microsoft.SPOT.Hardware.SPI.SPI_module spimodule)
{
this.SPIModule = spimodule;
this.SharingMode = Sharing.Shared;
this.Users = 0;
this.socket = socket;
}
/// <summary>
///
/// </summary>
/// <param name="socket">The <see cref="Socket"/> for the <see cref="SPI"/> interface.</param>
/// <param name="spiConfiguration">The <see cref="Configuration"/> object for the <see cref="SPI"/> interface.</param>
/// <param name="sharingMode">The <see cref="Sharing"/> mode of the <see cref="SPI"/> interface.</param>
/// <param name="chipSelectSocket">The chip select <see cref="Socket"/>of the <see cref="SPI"/> interface.</param>
/// <param name="chipSelectPin">The <see cref="Socket"/></param>
/// <param name="module">The <see cref="Module"/> that is connected to the <see cref="SPI"/> interface.</param>
public SPI(Socket socket, Configuration spiConfiguration, Sharing sharingMode, Socket chipSelectSocket, Socket.Pin chipSelectPin, Module module)
{
socket.EnsureTypeIsSupported('S', module);
Cpu.Pin reservedSelectPin = Socket.UnspecifiedPin;
if (chipSelectSocket != null)
{
reservedSelectPin = chipSelectSocket.ReservePin(chipSelectPin, module);
}
if (socket.SPIModule != Socket.SocketInterfaces.SPIMissing)
{
Interface = new NativeSpi(socket, spiConfiguration == null ? null : new Socket.SocketInterfaces.SpiConfiguration(
spiConfiguration.ChipSelectActiveState,
spiConfiguration.ChipSelectSetupTime,
spiConfiguration.ChipSelectHoldTime,
spiConfiguration.ClockIdleState,
spiConfiguration.ClockEdge,
spiConfiguration.ClockRateKHz,
false), (Socket.SocketInterfaces.SpiSharing)sharingMode, reservedSelectPin, module, socket.SPIModule);
}
else
{
Interface = socket.SpiIndirector(socket, spiConfiguration == null ? null : new Socket.SocketInterfaces.SpiConfiguration(
spiConfiguration.ChipSelectActiveState,
spiConfiguration.ChipSelectSetupTime,
spiConfiguration.ChipSelectHoldTime,
spiConfiguration.ClockIdleState,
spiConfiguration.ClockEdge,
spiConfiguration.ClockRateKHz,
false), (Socket.SocketInterfaces.SpiSharing)sharingMode, chipSelectSocket, chipSelectPin, null, default(Socket.Pin), module);
}
_spiModule = socket.SPIModule;
}
private static Microsoft.SPOT.Hardware.SPI.Configuration ToNativeConfiguration(Socket.SocketInterfaces.SpiConfiguration config, Cpu.Pin chipSelectPin, Microsoft.SPOT.Hardware.SPI.SPI_module spiModule)
{
if (config == null)
{
return(new Microsoft.SPOT.Hardware.SPI.Configuration(chipSelectPin, false, 0, 0, false, false, 0, spiModule));
}
return(new Microsoft.SPOT.Hardware.SPI.Configuration(
chipSelectPin,
config.IsChipSelectActiveHigh,
config.ChipSelectSetupTime,
config.ChipSelectHoldTime,
config.IsClockIdleHigh,
config.IsClockSamplingEdgeRising,
config.ClockRateKHz,
spiModule));
}
public NativeSpi(Socket socket, Socket.SocketInterfaces.SpiConfiguration configuration, Socket.SocketInterfaces.SpiSharing sharing, Cpu.Pin chipSelectPin, Module module, Microsoft.SPOT.Hardware.SPI.SPI_module spiModule)
{
_hardwareInstance = GetAndUseInstance(socket, sharing, module, spiModule);
_chipSelectPin = chipSelectPin;
_configuration = ToNativeConfiguration(configuration, chipSelectPin, spiModule);
if (_hardwareInstance.Interface == null && _configuration != null)
{
_hardwareInstance.Interface = new Microsoft.SPOT.Hardware.SPI(_configuration);
}
}
private static HardwareInstance GetAndUseInstance(Socket socket, Socket.SocketInterfaces.SpiSharing sharing, Module module, Microsoft.SPOT.Hardware.SPI.SPI_module spiModule)
{
if (spiModule == Socket.SocketInterfaces.SPIMissing)
{
// this is a mainboard error that should not happen (we already check for it in SocketInterfaces.RegisterSocket) but just in case...
throw Socket.InvalidSocketException.FunctionalityException(socket, "SPI");
}
HardwareInstance foundInstance = null;
for (int i = 0; i < Instances.Count; i++)
{
HardwareInstance instance = (HardwareInstance)Instances[i];
if (instance.Module == spiModule)
{
foundInstance = instance;
}
}
if (foundInstance == null)
{
Instances.Add(foundInstance = new HardwareInstance(spiModule));
}
if (foundInstance.Users == 0)
{
socket.ReservePin(Socket.Pin.Seven, module);
socket.ReservePin(Socket.Pin.Eight, module);
socket.ReservePin(Socket.Pin.Nine, module);
}
else
{
if (foundInstance.Sharing != Socket.SocketInterfaces.SpiSharing.Shared)
{
throw new Exception("SPI bus " + spiModule + " is already reserved, cannot instantiate it again.");
}
if (foundInstance.Sharing == Socket.SocketInterfaces.SpiSharing.Exclusive)
{
throw new Exception("SPI bus " + spiModule + " is already shared among " + foundInstance.Users + " users, cannot instantiate it for exclusive use.");
}
}
lock (foundInstance)
{
foundInstance.Users++;
foundInstance.Sharing = sharing;
}
return(foundInstance);
}
public NativeSpi(Socket socket, SpiConfiguration configuration, SpiSharing sharing, Hardware.Cpu.Pin chipSelectPin, Hardware.Cpu.Pin busyPin, Module module, Hardware.SPI.SPI_module spiModule)
{
_hardwareInstance = GetAndUseInstance(socket, sharing, module, spiModule);
_chipSelectPin = chipSelectPin;
_busyPin = busyPin;
_configuration = ToNativeConfiguration(configuration, chipSelectPin, busyPin, spiModule);
if (_hardwareInstance.Interface == null && _configuration != null)
{
_hardwareInstance.Interface = new Hardware.SPI(_configuration);
}
}
/// <summary>
///
/// </summary>
/// <param name="socket">The <see cref="Socket"/> for the <see cref="SPI"/> interface.</param>
/// <param name="spiConfiguration">The <see cref="Configuration"/> object for the <see cref="SPI"/> interface.</param>
/// <param name="sharingMode">The <see cref="Sharing"/> mode of the <see cref="SPI"/> interface.</param>
/// <param name="chipSelectSocket">The chip select <see cref="Socket"/>of the <see cref="SPI"/> interface.</param>
/// <param name="chipSelectPin">The <see cref="Socket"/></param>
/// <param name="module">The <see cref="Module"/> that is connected to the <see cref="SPI"/> interface.</param>
public SPI(Socket socket, Configuration spiConfiguration, Sharing sharingMode, Socket chipSelectSocket, Socket.Pin chipSelectPin, Module module)
{
socket.EnsureTypeIsSupported('S', module);
Cpu.Pin reservedSelectPin = Socket.UnspecifiedPin;
if (chipSelectSocket != null)
reservedSelectPin = chipSelectSocket.ReservePin(chipSelectPin, module);
if (socket.SPIModule != Socket.SocketInterfaces.SPIMissing)
Interface = new NativeSpi(socket, spiConfiguration == null ? null : new Socket.SocketInterfaces.SpiConfiguration(
spiConfiguration.ChipSelectActiveState,
spiConfiguration.ChipSelectSetupTime,
spiConfiguration.ChipSelectHoldTime,
spiConfiguration.ClockIdleState,
spiConfiguration.ClockEdge,
spiConfiguration.ClockRateKHz,
false), (Socket.SocketInterfaces.SpiSharing)sharingMode, reservedSelectPin, module, socket.SPIModule);
else
Interface = socket.SpiIndirector(socket, spiConfiguration == null ? null : new Socket.SocketInterfaces.SpiConfiguration(
spiConfiguration.ChipSelectActiveState,
spiConfiguration.ChipSelectSetupTime,
spiConfiguration.ChipSelectHoldTime,
spiConfiguration.ClockIdleState,
spiConfiguration.ClockEdge,
spiConfiguration.ClockRateKHz,
false), (Socket.SocketInterfaces.SpiSharing)sharingMode, chipSelectSocket, chipSelectPin, null, default(Socket.Pin), module);
_spiModule = socket.SPIModule;
}
