I've been working on a project to hack and communicate with a Gameboy Printer using Microsofts .NET gadgeteer modules. Up until now I was dealing with hardware (see this thread:http://www.tinyclr.com/forum/21/6665/)

I've wired the printer up as an SPI serial connection as required, and now I need to start swapping byte packages with the printer to start exploring printing.

I've made an attempt to put some code together but I've failed miserably. I can't really figure out how to speak to the printer. The only progress I've made is the SPI config, but the actual communication is beyond what I can understand. Perhaps someone can't point me in the right direction?

Here is the code I am trying to replicate: http://milesburton.com/i...r_Arduino_Alpha_0.01.pde

My main references are Thermaldotnet (a lib for the sparkfun printer) https://github.com/yukimizake/ThermalDotNet

SPI on Spider: http://tinyclr.com/forum/21/6621/

and a basic SPI example: http://wiki.tinyclr.com/...?title=SPI_-_MP3_Decoder

using System;
using System.Collections;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Presentation;
using Microsoft.SPOT.Presentation.Controls;
using Microsoft.SPOT.Presentation.Media;
using Microsoft.SPOT.Touch;
using Microsoft.SPOT.Hardware;
 
using Gadgeteer.Networking;
using GT = Gadgeteer;
using GTM = Gadgeteer.Modules;
using Gadgeteer.Modules.GHIElectronics;
 
namespace printTherm
{
    public partial class Program
    {
        static SPI MySPI = null;
        public static void Sub()
        {
 
            InputPort Therm;
            Therm = new InputPort(Cpu.Pin.GPIO_Pin8, false, Port.ResistorMode.PullUp);
 
            SPI.Configuration MyConfig =
                 new SPI.Configuration(Cpu.Pin.GPIO_Pin8,
                 false, 0, 0, true, true, 1000, SPI.SPI_module.SPI1);
            MySPI = new SPI(MyConfig);
 
 
 
            bool exit = false;
            do
            {
                byte[] tx_data = new byte[1];
                byte[] rx_data = new byte[0];
                while (Therm.Read() == true) ;
 
                tx_data[0] = 0x01;
                tx_data[1] = 0x00;
 
                MySPI.WriteRead(tx_data, rx_data);
 
                while (Therm.Read() == false) ;
                byte[] tx_data2 = new byte[28];
                byte[] rx_data2 = new byte[28];
                for (int i = 0; i < 28; i++)
                {
                    tx_data2[i] = 0xFF;
                    rx_data2[i] = 0x00;
                }
                MySPI.WriteRead(tx_data2, rx_data2);
            } while (exit == false);
 
 
            Thread.Sleep(100);
        }
 
        // This method is run when the mainboard is powered up or reset. 
        void ProgramStarted()
        {
 
            Debug.Print("Program Started");
        }
    }
}
 
 

It's almost exactly the same as the code above, except I've change the Pin to 8 (MISO) and added some array stuff. I'm really just going blind at this point. I feel bad coming into this with such poor knowledge, but any little help would be greatly appreciated.

some more resources for anyone interested in this:
full music shield code: http://code.tinyclr.com/...ct/330/fez-music-shield/