public byte[] ReadScratchpad()
{
byte[] result_block;
// select the device
if (Adapter.SelectDevice(Address, 0))
{
// create a block to send that reads the scratchpad
byte[] send_block = new byte[10];
// read scratchpad command
send_block[0] = (byte)0xBE;
// now add the read bytes for data bytes and crc8
for (int i = 1; i < 10; i++)
{
send_block[i] = (byte)0xFF;
}
// send the block
//Adapter.DataBlock(send_block, 0, send_block.Length);
Adapter.DataBlock(send_block);
// now, send_block contains the 9-byte Scratchpad plus READ_SCRATCHPAD_COMMAND byte
// convert the block to a 9-byte array representing Scratchpad (get rid of first byte)
result_block = new byte[9];
for (int i = 0; i < 9; i++)
{
result_block[i] = send_block[i + 1];
}
// see if CRC8 is correct
if (CRC8.Compute(send_block, 1, 9) == 0)
{
return(result_block);
}
}
return(null);
}
