Due I2C Driver Concept Question

[major4x]

Hi,

I took the template from the I2C AVR port and this doesn't seem to work. Before I start debugging, let me post the question, maybe I don't understand something simple:

This causes the I2C driver to hang:

i2c_lld.c:

Code: Select all

OSAL_IRQ_HANDLER(TWI1_Handler) {
  OSAL_IRQ_PROLOGUE();
    .
    .
    .
  if (i2cp->errors != I2C_NO_ERROR) {
    _i2c_wakeup_error_isr(i2cp);
  }

  OSAL_IRQ_EPILOGUE();
}

msg_t i2c_lld_master_transmit_timeout(I2CDriver *i2cp, i2caddr_t addr,
                                      const uint8_t *txbuf, size_t txbytes,
                                      uint8_t *rxbuf, size_t rxbytes,
                                      systime_t timeout) {
    .
    .
  return osalThreadSuspendTimeoutS(&i2cp->thread, timeout);
}


Commenting-out "_i2c_wakeup_error_isr(i2cp);" makes the i2c timeout. What am I doing wrong or this is outside of I2C?