Hi,

Your question is related to the EFR32 peripherals and not the Bluetooth stack so it was moved to the 32-bit MCU forum.

Regards,
Tiago

You should post your initialization and transfer code so we can understand see exactly what is being done.

Have you measured the I2C waveform to know what happens there? 

Thank you for you all,

I have found the problem, there is a mistaks in the PCB customisation.

regards,

Abba 

Hi,

I am sorry for reopening this thread, but i am wrong about in my last comment, my custom PCB is ok.

Please find under the code steps (this code is working well dev kit)

void i2c_transfer(uint16_t device_addr, uint8_t cmd_array[], uint8_t data_array[], uint16_t cmd_len, uint16_t data_len, uint8_t flag)
{
      // Transfer structure
      I2C_TransferSeq_TypeDef i2cTransfer;

      // Initialize I2C transfer
      I2C_TransferReturn_TypeDef result;
      i2cTransfer.addr          = device_addr;
      i2cTransfer.flags         = flag;
      i2cTransfer.buf[0].data   = cmd_array;
      i2cTransfer.buf[0].len    = cmd_len;

      // Note that WRITE_WRITE this is tx2 data
      i2cTransfer.buf[1].data   = data_array;
      i2cTransfer.buf[1].len    = data_len;

      // Set up the transfer
      result = I2C_TransferInit(I2C0, &i2cTransfer);
      printLog("I2C_TransferInit result = %d \n\r", result);

      // Do it until the transfer is done
      while (result != i2cTransferDone)
      {
            if (result != i2cTransferInProgress)
            {

            }
            result = I2C_Transfer(I2C0);
            printLog(" result = %d \n\r", result);

      }
   //   printLog("transfert done\r\n");
   //   BSP_LedSet(0);
}

Then i have in my log:

after I2C_TransferInit result = 1 
 result = 1 
 result = -1 
 result = -5 
 result = -5 
 result = -5 
....

infinite loop.

Have you any idea ?

regards,

Abba