Semaphore implementation for the Radio

RE: Semaphore implementation for the Radio

Susheel Nuguru — Wed, 09 Dec 2015 15:48:35 GMT

your welcome :)

RE: Semaphore implementation for the Radio

haruthakop — Wed, 09 Dec 2015 15:44:41 GMT

Hi Aryan

Thanks a lot for your help

RE: Semaphore implementation for the Radio

Susheel Nuguru — Tue, 08 Dec 2015 12:09:46 GMT

I think you can implement your own MUTual EXclusion semaphore and change the micro lib library where RADIO transaction is enabled to fetch this mutex first.

uint32_t mutex_acquire(uint8_t * p_mutex)
{
  bool success;
  int irq_was_masked;
  
  /* Disable Interrupts if not */
  irq_was_masked = __disable_irq(); 

  success = (*p_mutex != MUTEX_TAKEN);
  *p_mutex = MUTEX_TAKEN;
  
  /* Enable Interrupts if disabled by this function */
  if (!irq_was_masked)
  {
    __enable_irq();
  }
  
  if (success)
  {
    return UESB_SUCCESS;
  }
  else
  {
    return UESB_MUTEX_ALREADY_TAKEN_ERROR;
  }  
}

uint32_t mutex_release(uint8_t * p_mutex)
{
  int irq_was_masked;

  /* Disable Interrupts if not */
  irq_was_masked = __disable_irq(); 

  *p_mutex = MUTEX_FREE;

  /* Enable Interrupts if disabled by this function */
  if (!irq_was_masked)
  {
    __enable_irq();
  }
  
  return UESB_SUCCESS;
}

Keep in mind the possibility of a deadlock as mentioned here which you need to handle.

RE: Semaphore implementation for the Radio

haruthakop — Mon, 07 Dec 2015 15:47:21 GMT

Thanks for your answer.

Do you have any recommendation how can it be implemented in micro-esb library?

RE: Semaphore implementation for the Radio

Susheel Nuguru — Mon, 07 Dec 2015 15:39:19 GMT

Sorry, there is no such mechanism for RADIO