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In Topic: I2C on Netduino 1 not working
04 April 2013 - 03:38 PM
Hi Chris,
I currently have no logic analyzer.
My board is a "Netduino 2".
Through the change of the pull-ups on 1.2 k, my problem currently is solved with the I2C .
The board is working correctly. The bus line I first kept short.
Am now going to test the OneWire DS 2482-100 with 1 DS18S20 on the I2C Bus.
But I find no code example.
The onewire functions are new in the 4.2 framework? Where can I get help for Microsoft.SPOT.Hardware.OneWire class?
In Topic: I2C on Netduino 1 not working
18 March 2013 - 09:16 PM
My new test with the code: always count is 0:
public static void Main(){
var device = new I2CDevice(new I2CDevice.Configuration(0x50, 100));
I2CDevice.I2CTransaction[] actionsWrite;
uint adresse = 0x01;
byte[] data = new byte[] { 0x42 };
byte[] buffer = new byte[3];
buffer[0] = (byte)(adresse >> 8);
buffer[1] = (byte)adresse;
data.CopyTo(buffer, 2);
uint i = 0;
do {
actionsWrite = new I2CDevice.I2CTransaction[] { I2CDevice.CreateWriteTransaction(buffer) };
int count1 = device.Execute(actionsWrite, 1000);
Thread.Sleep(1000);
i++;
Debug.Print(i.ToString()+" Count: " + count1.ToString());
} while (true);
}
I think the board is defective!
In Topic: I2C on Netduino 1 not working
18 March 2013 - 08:59 PM
The processing of the 3 bytes in 3 transactions was only to test.
The first transaction returns as Return Code: 0 bytes transfers.
In the original code, all 3 bytes processed in one transaction
but only with the Return Code: 0 Bytes
The SCL line has at times no pulse on the instrument but always 4.85V
even after the end of the transaction.
Next I change my test back to one transaktion.
In Topic: I2C on Netduino 1 not working
18 March 2013 - 05:09 PM
Hi CW2,
The EEPROM is a Microchip 24LC64 (A0,A1,A2,WP = 0)
Here is my Testcode:
public static void Main()
{
I2CDevice.Configuration _slaveConfig = new I2CDevice.Configuration(0x50, 100);
uint adresse = 0x01;
byte[] buffer = new byte[2];
buffer[0] = (byte)(adresse >> 8);
buffer[1] = (byte)adresse;
int count = I2CBus.GetInstance().Write(_slaveConfig, buffer, 500);
byte[] data = new byte[] { 0x42 };
count = I2CBus.GetInstance().Write(_slaveConfig, data, 500);
Debug.Print("Count: " + count.ToString());
}
The I2C connection to the display is the same.
Another board with an ATmega32 working on the bus without problems
In Topic: I2C on Netduino 1 not working
18 March 2013 - 02:03 PM
Hi,
I again problems with the I2C bus in connection with the display and the serial EEPROM.
When code in I2CBus "transferred = _slaveDevice.Execute (writeXAction, transactionTimeout)" Transferred is always 0 and there is also no exception.
The multimeter can be seen in SCL and SDL has a frequency of 0.34 kHz and 4.85 V, and this is always constant.
The motherboard is defective?
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