I2C problems on GR-Sakura

Did you try this sample code?  I hope you are using Web compiler and the corresponding version of library.

tool-cloud2.renesas.com/.../library_wire.html

Thanks a lot for your answer Kaz.

I have tried following code using both Web compiler and the E2Studio stand alone version.

Also I tried both Sketch 2.06 and 1.08 with same result.

I expect to see some SCL signals while running the code on pins IO6/7 but all pins just low level.

Tried to use pull up resistors but still no SCL clk appear on any pins of the board.

Then I just tried to use wire instead of wire6 but still no signals on pins AD6/AD5.

What do I miss here?

By using a genuine Arduino UNO board it works!

One last thing. I did comment out Wire6.endTransmission(); to avoid the software to get stucked in this function.

Thanks for your support

/* GR-SAKURA Sketch Template V2.05 */

#include <Arduino.h>

#include <wire.h>

#include <utilities.h>

void I2C_Gyro();

#define INTERVAL 100

void setup()

{

   pinMode(PIN_LED0,OUTPUT);

   pinMode(PIN_LED1,OUTPUT);

   pinMode(PIN_LED2,OUTPUT);

   pinMode(PIN_LED3,OUTPUT);

   TwoWire(6);

   Wire6.begin(); // join i2c bus (address optional for master) (Pin 6 & 7)

}

void loop()

{

   digitalWrite(PIN_LED0, 1);

   delay(INTERVAL);

   digitalWrite(PIN_LED1, 1);

   delay(INTERVAL);

   digitalWrite(PIN_LED2, 1);

   delay(INTERVAL);

   digitalWrite(PIN_LED3, 1);

   delay(INTERVAL);

   digitalWrite(PIN_LED0, 0);

   delay(INTERVAL);

   digitalWrite(PIN_LED1, 0);

   delay(INTERVAL);

   digitalWrite(PIN_LED2, 0);

   delay(INTERVAL);

   digitalWrite(PIN_LED3, 0);

   delay(INTERVAL);

   analogWrite(1, 128);

   analogWrite(0, 128);

   I2C_Gyro();

}

void I2C_Gyro()

{

      Wire6.beginTransmission(63); // transmit to device #4

      Wire6.write("x is ");        // sends five bytes

      Wire6.write("a");            // sends one byte

      //Wire6.endTransmission();    // stop transmitting

      delay(500);

}

You need pull-up resisters use the wire.

Try this:

/* GR-SAKURA Sketch Template V2.06 */

#include <Arduino.h>
#include "wire.h"
#define INTERVAL 100
void setup() {

   pinMode(PIN_LED0,OUTPUT);

   pinMode(PIN_LED1,OUTPUT);
   pinMode(PIN_LED2,OUTPUT);
   pinMode(PIN_LED3,OUTPUT);
   Wire6.begin();
}

void loop(){

   digitalWrite(PIN_LED0, 1);
   digitalWrite(PIN_LED1, 1);
   digitalWrite(PIN_LED2, 1);
   digitalWrite(PIN_LED3, 1);

   Wire6.beginTransmission(63);
   Wire6.write("5");
   Wire6.endTransmission(63);

   digitalWrite(PIN_LED0, 0);

   digitalWrite(PIN_LED1, 0);
   digitalWrite(PIN_LED2, 0);
   digitalWrite(PIN_LED3, 0);
   delay(1000);

}

Then I got the following clock output:

Great and thanks a lot for your support. Now it finally works and I get a nice clk too.

Strange.......looks like the order of the code lines made the different.

Anyway we are back on track now:-)