Can somebody please help me understand how to program using the SPI library on MCP6S21. I'm using the Arduino Duemilanove(Atmega328) with the software ver 0019.
The MCP6S21 is 8-PDIP from microchip programmable gain amplifier (PGA) using SPI: SCK, SI, CS (only 3 pins - input only).
I've tried over and over again to simply write a program that changes the amplifier gain to X2 but with no success at all. The MCP6S21 basically programmed through the SPI interface using 16-bit words.
From what I see in the datasheet it supposed to be very simple but I've tried many variations of programs like the arduino examples: DigitalPotControl, BarometricPressureSensor or even something more close: /playground/Code/MCP3208
so far nothing worked.
I'm new to SPI and if someone can shade a light for me I'll be very grateful...