Beispiel #1
0
// Setup OS Tick.
int32_t  OS_Tick_Setup (uint32_t freq, IRQHandler_t handler) {
  uint32_t load;
  uint32_t prio;
  uint32_t bits;

  if (freq == 0U) {
    return (-1);
  }

  PTIM_PendIRQ = 0U;

  // Private Timer runs with the system frequency
  load = (SystemCoreClock / freq) - 1U;

  // Disable Private Timer and set load value
  PTIM_SetControl   (0U);
  PTIM_SetLoadValue (load);

  // Disable corresponding IRQ
  IRQ_Disable     (PrivTimer_IRQn);
  IRQ_ClearPending(PrivTimer_IRQn);

  // Determine number of implemented priority bits
  IRQ_SetPriority (PrivTimer_IRQn, 0xFFU);

  prio = IRQ_GetPriority (PrivTimer_IRQn);

  // At least bits [7:4] must be implemented
  if ((prio & 0xF0U) == 0U) {
    return (-1);
  }

  for (bits = 0; bits < 4; bits++) {
    if ((prio & 0x01) != 0) {
      break;
    }
    prio >>= 1;
  }
  
  // Adjust configured priority to the number of implemented priority bits
  prio = (PTIM_IRQ_PRIORITY << bits) & 0xFFUL;

  // Set Private Timer interrupt priority
  IRQ_SetPriority(PrivTimer_IRQn, prio-1U);

  // Set edge-triggered IRQ
  IRQ_SetMode(PrivTimer_IRQn, IRQ_MODE_TRIG_EDGE);

  // Register tick interrupt handler function
  IRQ_SetHandler(PrivTimer_IRQn, handler);

  // Enable corresponding interrupt
  IRQ_Enable (PrivTimer_IRQn);

  // Set bits: IRQ enable and Auto reload
  PTIM_SetControl (0x06U);

  return (0);
}
Beispiel #2
0
/*
 *
 * Function Name:  cslDsiEnaIntEvent
 *
 * Description:    event bits set to "1" will be enabled,
 *                 rest of the events will be disabled
 *
 */
static void cslDsiEnaIntEvent(DSI_HANDLE dsiH, UInt32 intEventMask)
{
	intEventMask |= XTRA_INT;
	chal_dsi_ena_int(dsiH->chalH, intEventMask);
#ifdef UNDER_LINUX
/*      enable_irq(dsiH->interruptId); */
#else
	IRQ_Enable(dsiH->interruptId);
#endif
}