private float ReadCapSen1_1(byte[] RegAddrBuf1, byte[] RegAddrBuf2)
{
byte[] ReadBuf1, ReadBuf2;
ReadBuf1 = new byte[2]; /* We read 2 bytes sequentially */
ReadBuf2 = new byte[2]; /* We read 2 bytes sequentially */
I2CSensor.WriteRead(RegAddrBuf1, ReadBuf1);
I2CSensor.WriteRead(RegAddrBuf2, ReadBuf2);
/* In order to get the raw 16-bit data values, we need to separate the bytes */
int RawData = BitConverter.ToInt16(ReadBuf1, 0);
//int RawData = BitConverter.ToInt16(ReadBuf, 0);
CapMeasure capMeas1_1;
capMeas1_1.CapReadLSB1_1 = (0xFF00 & RawData) >> 8;
capMeas1_1.CapreadMSB1_1 = 0x00FF & RawData;
/* In order to get the raw 16-bit data values, we need to separate the bytes */
RawData = BitConverter.ToInt16(ReadBuf2, 0);
capMeas1_1.CapReadLSB1_2 = (0xFF00 & RawData) >> 8;
capMeas1_1.CapreadMSB1_2 = 0x00FF & RawData;
int CapLabel1_1 = (capMeas1_1.CapreadMSB1_1 * 256 + capMeas1_1.CapReadLSB1_1);
int CapLabel1_2 = capMeas1_1.CapreadMSB1_2 * 256 + capMeas1_1.CapReadLSB1_2;
int CapLabel1Both = (CapLabel1_1 * 256 + capMeas1_1.CapreadMSB1_2);
float FinalCapMeasure = CapLabel1Both / 524288;
return(FinalCapMeasure);
}
private float ReadCapSen1_1(int RegAddrBuf1, int RegAddrBuf2)
{
int temp1 = (I2CSensor.ReadAddressWord(RegAddrBuf1));
int temp2 = (I2CSensor.ReadAddressWord(RegAddrBuf2));
byte[] byteData1 = BitConverter.GetBytes(temp1);
byte[] byteData2 = BitConverter.GetBytes(temp2);
byte[] byteData3 = { byteData2[0], byteData1[1], byteData1[0], 0 };
int CapLabel1Both = BitConverter.ToInt32(byteData3);
float FinalCapMeasure = CapLabel1Both / 524288f;
return(FinalCapMeasure);
}
private OneRegisterRead ReadOneReg(byte[] RegAddrBuf)
{
byte[] ReadBuf;
ReadBuf = new byte[2]; // need to read the two bytes stored in the targeted register
I2CSensor.WriteRead(RegAddrBuf, ReadBuf);
// A little confusing but decided to parse the two bytes into separate bytes, convert to 'int'
// then return this information so we can perform calculations.
int RawData = BitConverter.ToInt16(ReadBuf, 0);
OneRegisterRead OneRegReadDataOut;
OneRegReadDataOut.DataMSB = 0xFF00 & RawData >> 8;
OneRegReadDataOut.DataLSB = 0x00FF & RawData; // if reading Done bit, use this statement ==> ((byte)(0x08 & RawData) >> 3)
return(OneRegReadDataOut);
}
private void WriteToI2CDevice()
{
/*
* Initialize the FDC1004 capacitance sensor:
*
* For this device, we create 3-byte write buffers: ==> this device uses
* The first byte is the register address we want to write to.
* The second byte is the contents of the MSB that we want to write to the register.
* The third byte is the contents of the LSB that we want to write to the register.
*/
byte[] WriteBuf_MeasurementOneFormat = new byte[] { MEAS_ONE_CONTROL, 0x1c, 0x00 }; // configs measurement 1
byte[] WriteBuf_MeasurementTwoFormat = new byte[] { MEAS_TWO_CONTROL, 0x3c, 0x00 }; // configs measurement 2
byte[] WriteBuf_MeasurementThreeFormat = new byte[] { MEAS_THREE_CONTROL, 0x5c, 0x00 }; // configs measurement 3
byte[] WriteBuf_Cin1 = new byte[] { CIN1_CONTROL, 0x30, 0x00 }; // Set Offset for Cin1 to "6"pF based on datsheet calculations
byte[] WriteBuf_FDC_Config = new byte[] { FDC_CONF_CONTROL, 0x0D, 0xE0 }; //set to read at 400S/s with repeat and read at measurement #1,#2,#3
I2CSensor.Write(WriteBuf_MeasurementOneFormat);
I2CSensor.Write(WriteBuf_MeasurementTwoFormat);
I2CSensor.Write(WriteBuf_MeasurementThreeFormat);
I2CSensor.Write(WriteBuf_Cin1);
I2CSensor.Write(WriteBuf_FDC_Config);
}
private void WriteToI2CDevice()
{
/*
* Initialize the FDC1004 capacitance sensor:
*
* For this device, we create 3-byte write buffers: ==> this device uses
* The first byte is the register address we want to write to.
* The second byte is the contents of the MSB that we want to write to the register.
* The third byte is the contents of the LSB that we want to write to the register.
*/
byte[] WriteBuf_MeasurementOneFormat = new byte[] { 0x1c, 0x00 }; // configs measurement 1
byte[] WriteBuf_MeasurementTwoFormat = new byte[] { 0x3c, 0x00 }; // configs measurement 2
byte[] WriteBuf_MeasurementThreeFormat = new byte[] { 0x5c, 0x00 }; // configs measurement 3
byte[] WriteBuf_FDC_Config = new byte[] { 0x0D, 0xE0 }; //set to read at 400S/s with repeat and read at measurement #1,#2,#3
I2CSensor.WriteAddressWord(MEAS_ONE_CONTROL, BitConverter.ToUInt16(WriteBuf_MeasurementOneFormat));
I2CSensor.WriteAddressWord(MEAS_TWO_CONTROL, BitConverter.ToUInt16(WriteBuf_MeasurementTwoFormat));
I2CSensor.WriteAddressWord(MEAS_THREE_CONTROL, BitConverter.ToUInt16(WriteBuf_MeasurementThreeFormat));
I2CSensor.WriteAddressWord(FDC_CONF_CONTROL, BitConverter.ToUInt16(WriteBuf_FDC_Config));
}
/// <summary>
/// Resets the I2C port
/// </summary>
public void Reset()
{
byte[] WriteBuf_FDC_Config = new byte[] { FDC_CONF_CONTROL, 0x8C, 0x00 };
I2CSensor.Write(WriteBuf_FDC_Config);
WriteToI2CDevice();
}
