Stephen

Hello,

I'm trying to figure out SPI on the netduino with this code:

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

namespace NetduinoApplication1 {
    public class Program {
        public static void Main() {
            SPI spi_port = new SPI(new SPI.Configuration(
                Pins.GPIO_NONE,                             // Chip select pin
                false,                                      // false - CS active state is low
                0,                                          // CS setup time in ms
                0,                                          // CS hold time
                false,                                      // false - Clk low on idle
                false,                                      // false - Data valid on falling edge
                100,                                        // Clock rate in kHz
                SPI_Devices.SPI1                            // SPI Module
                ));
            byte[] readBuffer = new byte[2];
            while (true) {                
                spi_port.WriteRead(new byte[] { 0x00, 0x55 }, readBuffer);
                //Thread.Sleep(1);
            }
        }       
    }
}

I have problem with:
1. Clock rate adjustment. What clock speed is supported by Netduino?
2. 20us before the data transfer, the clock line is weakly pulled-up for about 40us. This gave me an extra unwanted clock edge. Is it possible to remove this?