k0fei

One of a batch of 6 Netduinos is defective.  How do I get it replaced?

Thanks

Hi Chris,

I left more info on the thread about the I2C not working including the test code.

I can get you a logic trace of the I2C bug but it just two lines staying high.

MiniJTAG - Got it.

I am trying to read a TMP100 temperature sensor.  It works when I use the I2C Software emulation code SoftwareI2CBus so I know the hardware is good.  When I try using I2CDevice the SCL and SDA pins just stay high.  I have a Saleae Logic 16 on the pins.  I see data using the software emulation but not using the I2CDevice.

Here is the code:

[color=#2d2cfa;]using[/color] System;

[color=#2d2cfa;]using[/color] System.Net;

[color=#2d2cfa;]using[/color] System.Net.Sockets;

[color=#2d2cfa;]using[/color] System.Threading;

[color=#2d2cfa;]using[/color] Microsoft.SPOT;

[color=#2d2cfa;]using[/color] Microsoft.SPOT.Hardware;

[color=#2d2cfa;]using[/color] SecretLabs.NETMF.Hardware;

[color=#2d2cfa;]using[/color] SecretLabs.NETMF.Hardware.Netduino;

namespace[color=#000000;] I2CTest[/color]

{

[color=#000000;]    [/color]public[color=#000000;] [/color]class[color=#000000;] [/color][color=#34a2bb;]Program[/color]

    {

        [color=#2d2cfa;]public[/color] [color=#2d2cfa;]static[/color] [color=#2d2cfa;]void[/color] Main()

        {

[color=#000000;]            [/color]I2CDevice[color=#000000;].[/color]Configuration[color=#000000;] config = [/color][color=#2d2cfa;]new[/color][color=#000000;] [/color]I2CDevice[color=#000000;].[/color]Configuration[color=#000000;](0x48, 100);[/color]

            [color=#34a2bb;]I2CDevice[/color] dev = [color=#2d2cfa;]new[/color] [color=#34a2bb;]I2CDevice[/color](config);

[color=#000000;]            [/color]// Make the transactions

            [color=#34a2bb;]Byte[/color][] tempData = [color=#2d2cfa;]new[/color] [color=#34a2bb;]Byte[/color][2];

            [color=#2d2cfa;]var[/color] transaction = [color=#2d2cfa;]new[/color] [color=#34a2bb;]I2CDevice[/color].[color=#34a2bb;]I2CTransaction[/color][] {

                [color=#34a2bb;]I2CDevice[/color].CreateWriteTransaction([color=#2d2cfa;]new[/color] [color=#34a2bb;]Byte[/color][] {0x00}),

                [color=#34a2bb;]I2CDevice[/color].CreateReadTransaction(tempData)

            };

            [color=#34a2bb;]Int32[/color] bytesTransfered = dev.Execute(transaction, 300);

            [color=#2d2cfa;]if[/color] ( bytesTransfered == 0)

            {

[color=#000000;]                [/color][color=#2d2cfa;]throw[/color][color=#000000;] [/color][color=#2d2cfa;]new[/color][color=#000000;] [/color][color=#34a2bb;]Exception[/color][color=#000000;]([/color]"I2C transaction failed"[color=#000000;]);[/color]

            }

            [color=#34a2bb;]UInt16[/color] utmp = tempData[0];

            utmp <<= 8;

            utmp |= tempData[1];

            [color=#34a2bb;]Int16[/color] tmp = ([color=#34a2bb;]Int16[/color])utmp;

            [color=#34a2bb;]Double[/color] temp = ([color=#34a2bb;]Double[/color])tmp;

            temp /= ([color=#34a2bb;]Double[/color])256;

        [color=#34a2bb;]Debug[/color].Print(temp.ToString() + [color=#b51f20;]" Degrees C"[/color]);

    }

    }

}

The Netduino Plus 2 has an operational temperature range of 0 - 70 C.  What limits it from being operational down to -40 C?  I would like to use it in an outdoor project that could go to -40C.