FEZ Mini SPI question

NETMF & Gadgeteer
1

Hey, Im using the FEZ mini and I am connecting to the AD5206 digital potentiometer over SPI. I had created a class that wraps the AD5206 and used this constructor to set it up:


        public AD5206()
        {
            config = new SPI.Configuration((Cpu.Pin)Pins.GPIO_PIN_13, false, 0, 0, false, true, 1000, SPI.SPI_module.SPI1);
            SPI1 = new SPI(config);
        }

        public void SendAddressValue(int potAddress, int potValue)
        {
            tx_data[0] = (byte)potAddress;//digipot address (0 through 5)
            tx_data[1] = (byte)potValue;//value to put pot (0 through 255)

            SPI1.Write(tx_data);
        }

previously i had used GPIO_PIN_19 as the CS pin on the SPI but i had to move it to pin 19 so that i could put some other PWM stuff on the board but pin 13 doesnt seem to work for some reason and i am trying to wrap my head around why. I hooked a Saleae Logic to it to see why and can see that the pin 13 never seems to fire even though I can see the data on the SPCK and MOSI pins. Why would it not fire? Can Pin 13 not be used like that? Thanks
James

2

Step away from the SPI problem. Create a new app, that toggles the pin in question. Does that work?

What is the pin mapping between GPIO_13 and the Fez Di(x) pins?

http://www.ghielectronics.com/downloads/FEZ/Mini/Broch_FEZ_Mini.pdf has the default mappings; perhaps you aren’t looking at the correct physical pin?

3

ha, just realized i am posting to the wrong forum, i have a netduino mini in the project not the FEZ Mini, sorry

4

u could mark my answer as a question and move on quietly then :wink:

5

Boom

6

That is not quietly! :wink: