Matteo Defanti

Hello everybody
I'm trying to interface my Netduino standard to a Texas Instrument TPIC as shown up in the image!

That's the code:

using System;
using System.Threading;
using Microsoft.SPOT;
using Microsoft.SPOT.Hardware;
using SecretLabs.NETMF.Hardware;
using SecretLabs.NETMF.Hardware.Netduino;

namespace i2cMaster2._0
{
    public class Program
    {
         
        static OutputPort Gneg = new OutputPort(Pins.GPIO_PIN_D0, true);
         
        public static void Main()
        {
            OutputPort SDA = new OutputPort(Pins.GPIO_PIN_A4, false); // read in the forum to reset the 2 ports
            OutputPort SCK = new OutputPort(Pins.GPIO_PIN_A5, false);
            SDA.Dispose();
            SCK.Dispose();

            I2CDevice.Configuration cnf = new I2CDevice.Configuration(0x60, 400);

            I2CDevice TPIC2810 = new I2CDevice(cnf);

            byte[] outBuffer = new byte[] { 0x44, 0x64 }; 

            I2CDevice.I2CWriteTransaction writeTransaction = I2CDevice.CreateWriteTransaction(outBuffer);
            

            I2CDevice.I2CTransaction[] transactions = new I2CDevice.I2CTransaction[] 
                                                               {
                                                                    writeTransaction
                                                               };
            while (true)
            {
               
                TPIC2810.Execute(transactions,  100);
            }
             
        }

    }
}

and that's the sequence to send to the device in order to have 0x64 in the 8 leds.





I couldn't get it works so I have tried to test SDA and SCK with the oscilloscope and i just see a +5volts continue line without signals...

Where am i making mistakes? Has anyone got the same problem?

Thank you!

Here is the link of the TPIC2810 datasheet Click Here