FEZ Spider with I2C SI4703 FM Module

Hello everyone

This is my first thread here, please move it if i’ve placed it wrong. I habe a Problem which is maybe very Simple for you, but i don’t get it.

I have a Sparkfun SI4703 Evaluation Board (https://www.sparkfun.com/products/10663) which is connected over I2C with the FEZ Spider Board on Port 4 and a Breakout Board. The I2C Connection is “established” and Working. The Module is also initialized with the following Code to 2 Wire I2C Mode:

OutputPort RST = new OutputPort((Cpu.Pin)Pin.IO1, false);
            OutputPort SDA = new OutputPort((Cpu.Pin)Pin.IO0, false);




            I2CDevice.Configuration con = new I2CDevice.Configuration(0x10, 400);
            I2CDevice MyI2C = new I2CDevice(con);

But my Problem now is, that i don’t know how i have to write and Read to and from the Register. A Screenshot of the register is attached. Probably the 2 Bytes length is confusing me…

What command do i need, as example, to write the ENABLE Bit in Register 02h to 1 ?

This is not working:

 { 2,1 };
            xActions[0] = I2CDevice.CreateWriteTransaction(RegisterNum);

Has anyone a hint for me ?

Best Regards from Switzerland (:

I’m not much of an I2C user, but have you checked out the I2C document here?


Hi Jason

Yes, but there is only an Example for reading wich checks if the Register is accessible…
I’d like to know how to write to this Register.

I also don’t know for what this numbers in the square Brackets are for ?

@ manu_xD - have a look at this thread, includes code

@ Justin

Thank you so much! Just what i need (:

Best Regards

@ manu_xD - Your welcome, let us know how you get on :slight_smile: