當然,您可以使用盡可能多的(儘可能多的GPIO引腳)。 您只需指明您要撥打的設備即可。
首先,設置SPI的配置,例如,使用片選線0
settings = new SpiConnectionSettings(0); //chip select line 0
settings.ClockFrequency = 1000000;
settings.Mode = SpiMode.Mode0;
String spiDeviceSelector = SpiDevice.GetDeviceSelector();
devices = await DeviceInformation.FindAllAsync(spiDeviceSelector);
_spi1 = await SpiDevice.FromIdAsync(devices[0].Id, settings);
不能在採取進一步行動使該引腳!所以現在您應該使用GpioPin類來配置輸出端口,您將使用它來指示設備。
GpioPin_19 = IoController.OpenPin(19);
GpioPin_19.Write(GpioPinValue.High);
GpioPin_19.SetDriveMode(GpioPinDriveMode.Output);
GpioPin_26 = IoController.OpenPin(26);
GpioPin_26.Write(GpioPinValue.High);
GpioPin_26.SetDriveMode(GpioPinDriveMode.Output);
GpioPin_13 = IoController.OpenPin(13);
GpioPin_13.Write(GpioPinValue.High);
GpioPin_13.SetDriveMode(GpioPinDriveMode.Output);
始終之前轉移指示裝置:(示例方法)
private byte[] TransferSpi(byte[] writeBuffer, byte ChipNo)
{
var readBuffer = new byte[writeBuffer.Length];
if (ChipNo == 1) GpioPin_19.Write(GpioPinValue.Low);
if (ChipNo == 2) GpioPin_26.Write(GpioPinValue.Low);
if (ChipNo == 3) GpioPin_13.Write(GpioPinValue.Low);
_spi1.TransferFullDuplex(writeBuffer, readBuffer);
if (ChipNo == 1) GpioPin_19.Write(GpioPinValue.High);
if (ChipNo == 2) GpioPin_26.Write(GpioPinValue.High);
if (ChipNo == 3) GpioPin_13.Write(GpioPinValue.High);
return readBuffer;
}