bsp_switch.c

IAR 平台ATMEL 的例程, 和说明

/*-----------------------------------------------------------------------------
*   EUROPE TECHNOLOGIES Software Support
*------------------------------------------------------------------------------
* The software is delivered "AS IS" without warranty or condition of any
* kind, either express, implied or statutory. This includes without
* limitation any warranty or condition with respect to merchantability or
* fitness for any particular purpose, or against the infringements of
* intellectual property rights of others.
*------------------------------------------------------------------------------
*
* Processor   : easyCAN
* File Name   : csp_switch.c
* Description : Function declarations for GPT Management with the switches.
*		There are 3 goals 
* Version     : 1.01
*
*       +----- (NEW | MODify | ADD | DELete)                                 
*       |                                                                    
*  No   |   when       who                what               
*-----+---+----------+------------------+--------------------------------------
* 000  NEW  09/07/01   David LEWIN        Creation
* 001  MOD  18/07/01   Frederic SAMSON    - Remove all menu configurations to
*                                           the application layer
*                                         - Update Interrupt handlers
*                                         - Add structure declaration : BSP_SWITCH_a_s
*                                         - Update included files : call to csp.h and bsp.h
*                                         - Add comments 
* 002  MOD  31/01/02   Mahmoud Mesgarzadeh   Clean Up

*----------------------------------------------------------------------------*/

/******************************************************************************
Include files
******************************************************************************/
#include "csp.h"
#include "bsp.h"

BSP_SWITCH_T BSP_SWITCH_a_s ;

/******************************************************************************
* Function          : BSP_TIOB1InterruptHandler
* Description       : Call to the callback function declared in BSP_SWITCH_a_s
*                     structure 
* Inputs            : None
* Functions called  : None
* Returns           : None
******************************************************************************/
void BSP_SWITCHTIOB1InterruptHandler (void)
{
  
  U32_T status_u32; /* Status Register */
 
 
  /* To clear the INT : read the SR */
  status_u32 = CSP_GPT_GET_SR(GPT0CH1);		

  if( (status_u32 & TIOB & CSP_GPT_GET_IMR(GPT0CH1)) != 0 )
  {
     /* INT raised and PIO pin high */
     if( (CSP_GPT_GET_PDSR(GPT0CH1) & TIOB) != 0)
     {
        /* Call BSP Switch TIOB1 Callback */
        (BSP_SWITCH_a_s.TIOB1_function)();

		/* Wait until switch is released */
		while((CSP_GPT_GET_PDSR(GPT0CH1) & TIOB) != 0);
     }
  }

}

/******************************************************************************
* Function          : BSP_TIOA2InterruptHandler
* Description       : Call to the callback function declared in BSP_SWITCH_a_s
*                     structure 
* Inputs            : None
* Functions called  : None
* Returns           : None
******************************************************************************/
void BSP_SWITCHTIOA2InterruptHandler (void)
{
  U32_T status_u32; /* Status Register */


  /* To clear the INT : read the SR */
  status_u32 = CSP_GPT_GET_SR(GPT0CH2);		

  if( (status_u32 & TIOA & CSP_GPT_GET_IMR(GPT0CH2)) != 0 )
  {
     /* INT raised and PIO pin high */
     if( (CSP_GPT_GET_PDSR(GPT0CH2) & TIOA) != 0)
     {
        /* Call BSP Switch TIOA2 Callback */
        (BSP_SWITCH_a_s.TIOA2_function)();

	/* Wait until switch is released */
        while(((CSP_GPT_GET_PDSR(GPT0CH2) & TIOA) != 0));
       
     }
  }
  
}

/******************************************************************************
* Function          : BSP_IRQ0InterruptHandler
* Description       : Call to the callback function declared in BSP_SWITCH_a_s
*                     structure 
* Inputs            : None
* Functions called  : None
* Returns           : None
******************************************************************************/
void BSP_SWITCHIRQ0InterruptHandler(void)
{

   /* Is the IRQ switch pressed ? */
   if ((CSP_GIC_GET_SMR(GIC, EXTIRQ0) & SRCTYP) == 0x20)
   {
      /* Yes, call the correponding callback function */
      (BSP_SWITCH_a_s.IRQ0_function)();
   }

}

/******************************************************************************
* Function          : BSP_SWITCHInit
* Description       : Set mode for GPT with TIOA2 & TIOB1
* Inputs            : None
* Functions called  : CSP_GPTPioInit, CSP_GPTConfigInterrupt, CSP_AICConfigExternalInterrupt
* Returns           : None
******************************************************************************/
void BSP_SWITCHInit(void)
{

   /* 1st Configure the GPT for PIO.The output mask is forced to 0 */
   CSP_GPTPioInit(GPT0CH1, TIOB, 0);
   CSP_GPTPioInit(GPT0CH2, TIOA, 0);
 
   /* Then Enable the INT */
   CSP_GPTConfigInterrupt(GPT0CH1, (HIGH_LEVEL_SENSITIVE | PRIOR_1)  ,TIOB, (U32_T) BSP_AsmTIOB1InterruptHandler);
   CSP_GPTConfigInterrupt(GPT0CH2, (HIGH_LEVEL_SENSITIVE | PRIOR_0)  ,TIOA, (U32_T) BSP_AsmTIOA2InterruptHandler);

   /* IRQ0 ( bit 28 ) */
   CSP_GICConfigInterrupt(EXTIRQ0, (NEGATIVE_EDGE_TRIGGERED | PRIOR_0), (U32_T) BSP_AsmIRQ0InterruptHandler);
}