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Problem with I2C at PIC32
30-08-2012, 04:44 PM,
RE: Problem with I2C at PIC32
Hi all,

I'm currently trying to set up an I2C connexion between an Arduino Uno and a Pinguino (Pic32 pinguino OTG from olimex).
I use the x.3 version of pinguino ide.

But apparently, the pinguino doesn't initialize well the connexion.

here is my code:

int ledPin =13;

void setup()
  pinMode(ledPin, OUTPUT);
  I2C.init(I2C1, I2C_MASTER_MODE, I2C_100KHZ); // join i2c bus (address optional for master)

void loop()
  digitalWrite(ledPin, HIGH);
  I2C.send(0x04, 0x1E);        // sends five bytes
  digitalWrite(ledPin, LOW);

Actually, the pinguino seems to get blocked on the send function and I guess it's because the initialization hasn't succeed ( I checked the signal with an oscilloscope, and it appear there is juste a constant 3V3 instead of a normal SCL signal).

Is there something wrong with my code or the library doesn't yet work with a pinguino otg ?


Edit : ok, I finally found the library modified by RLmonitor and it seems to work. I still have 2 questions concerning I2C with pinguino :
1 - Does someone have implemented the I2Cslave Mode for pinguino ?
2 - If not, is it still possible to use the Arduino I2c library with pinguino in order to set up the board in slave mode ?

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