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view src/cs/drivers/drv_app/kpd/kpd_task.c @ 268:f2e52cab0a73

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abb_inth.c: check all interrupt causes, not just one The original code used if - else if - else if etc constructs, thus the first detected interrupt was the only one handled. However, Iota ITSTATREG is a clear-on-read register, thus if we only handle the first detected interrupt and skip checking the others, then the other interrupts will be lost, if more than one interrupt happened to occur in one ABB interrupt handling cycle - a form of rare race condition. Change the code to check all interrupts that were read in this cycle.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 13 Jun 2021 18:17:53 +0000
parents 4e78acac3d88
children 82665effff30
line wrap: on
line source

/**
 * @file   kpd_task.c
 *
 * Coding of the main keypad function : kpd_core
 * This function loop in the process message function for waiting messages.
 *
 * @author   Laurent Sollier (l-sollier@ti.com)
 * @version 0.1
 */

/*
 * History:
 *
 *   Date          Author       Modification
 *  ----------------------------------------
 *  10/10/2001     L Sollier    Create
 *
 *
 * (C) Copyright 2001 by Texas Instruments Incorporated, All Rights Reserved
 */

#include "kpd/kpd_env.h"
#include "kpd/kpd_i.h"

#include "rv/rv_general.h"
#include "rvf/rvf_api.h"
#include "rvm/rvm_use_id_list.h"


/* External declaration until Riviera 1.6 is available*/
extern T_RV_RET kpd_handle_msg(T_RV_HDR*  msg_p);
extern T_RV_RET kpd_handle_timer(UINT8 timer_num);



/**
 * @name Functions implementation
 *
 */
/*@{*/

/**
 * function: kpd_core
 */
T_RV_RET kpd_core(void)
{   
   BOOLEAN error_occured = FALSE;
   T_RV_HDR* msg_p;
   UINT16 received_event;

   KPD_SEND_TRACE("KPD: Initialization", RV_TRACE_LEVEL_DEBUG_HIGH);

   /* loop to process messages */
   while (error_occured == FALSE)
   {
      /* Wait for the necessary events. */
       received_event = rvf_wait ( 0xffff,0);

      if (received_event & RVF_TASK_MBOX_0_EVT_MASK)
      {
         /* Read the message */
         msg_p = (T_RV_HDR*) rvf_read_mbox( KPD_MAILBOX_USED);

         kpd_handle_msg(msg_p);
      }

      if (received_event & RVF_TIMER_0_EVT_MASK)
      {
         kpd_handle_timer(RVF_TIMER_0);
      }

      if (received_event & RVF_TIMER_1_EVT_MASK)
      {
         kpd_handle_timer(RVF_TIMER_1);
      }
      if (received_event & RVF_TIMER_2_EVT_MASK)
      {
         kpd_handle_timer(RVF_TIMER_2);
      }
      if (received_event & RVF_TIMER_3_EVT_MASK)
      {
         kpd_handle_timer(RVF_TIMER_3);
      }

   }

   return RV_OK;
}