public void ReadADC()
{
byte[] readBuffer = new byte[3]; /* Buffer to hold read data*/
byte[] writeBuffer = new byte[3] {
0x00, 0x00, 0x00
};
/* Setup the appropriate ADC configuration byte */
switch (ADC_DEVICE)
{
case AdcDevice.MCP3002:
writeBuffer[0] = MCP3002_CONFIG;
break;
case AdcDevice.MCP3208:
writeBuffer[0] = MCP3208_CONFIG;
break;
case AdcDevice.MCP3008:
writeBuffer[0] = MCP3008_CONFIG[0];
writeBuffer[1] = MCP3008_CONFIG[1];
break;
}
SpiADC.TransferFullDuplex(writeBuffer, readBuffer); /* Read data from the ADC */
adcValue = convertToInt(readBuffer); /* Convert the returned bytes into an integer value */
/* UI updates must be invoked on the UI thread */
var task = this.Dispatcher.RunAsync(Windows.UI.Core.CoreDispatcherPriority.Normal, () =>
{
textPlaceHolder.Text = adcValue.ToString(); /* Display the value on screen */
});
}
public int ReadADC()
{
byte[] readBuffer = new byte[3]; /* Buffer to hold read data*/
byte[] writeBuffer = new byte[3] {
0x00, 0x00, 0x00
};
writeBuffer[0] = MCP3008_CONFIG[0];
writeBuffer[1] = MCP3008_CONFIG[1];
SpiADC.TransferFullDuplex(writeBuffer, readBuffer); /* Read data from the ADC */
return(convertToInt(readBuffer)); /* Convert the returned bytes into an integer value */
}
public int ReadADC(byte channel)
{
byte[] readBuffer = new byte[3]; /* Buffer to hold read data*/
byte[] writeBuffer = new byte[3] {
0x00, 0x00, 0x00
};
/* Setup the appropriate ADC configuration byte */
writeBuffer[0] = (byte)(6 + ((channel & 4) >> 2));
writeBuffer[1] = (byte)((channel & 3) << 6);
writeBuffer[2] = 0;
SpiADC.TransferFullDuplex(writeBuffer, readBuffer); /* Read data from the ADC */
return(((readBuffer[1] & 15) << 8) + readBuffer[2]); /* Convert the returned bytes into an integer value */
}
public void async(byte whichChannel)//SPI取值
{
//whichChannel=0
byte command = whichChannel;
command |= 0x08; //command跟0x08(00001000)進行OR運算
command <<= 4; //向左移位4位元
byte[] readBuffer = new byte[3];
byte[] writeBuffer = new byte[3] {
0x01, command, 0x00
};
SpiADC.TransferFullDuplex(writeBuffer, readBuffer);//rpi3和mcp3008傳輸(全雙工)
adcValue = convertToInt(readBuffer);
}