main.c

at91sam7 use PIO interrupt to finish PS2 protocl

// ----------------------------------------------------------------------------
//         ATMEL Microcontroller Software Support  -  ROUSSET  -
// ----------------------------------------------------------------------------
// DISCLAIMER:  THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
// DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
// OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
// EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ----------------------------------------------------------------------------
// File Name           : main.c
// Object              : main application written in C
// Creation            : JPP   08-Sep-2005
// ----------------------------------------------------------------------------

// Include Standard LIB  files
#include "project.h"
#include <stdio.h>
#include <stdlib.h>
//*   Waiting time between AT91B_LED1 and AT91B_LED2
#define     WAIT_TIME       AT91B_MCK

#define PIO_INTERRUPT_LEVEL     2
#define SOFT_INTERRUPT_LEVEL	2
#define FIQ_INTERRUPT_LEVEL     7  // Always high

//* Global variable
int count_timer0_interrupt;
int count_timer1_interrupt;
int clkKey = 0;
int no_INT0_time = 0;
// Use the Library Handler defined in file periph/pio/pio_irq/irq_pio.s

extern void FIQ_init_handler(void);

// External Function Prototype
extern void timer_init (void );
extern void Usart_init (void);

extern void AT91F_DBGU_Init (void);
extern void AT91F_DBGU_Printk(	char *buffer) ;

char strprint[30] = {0};
unsigned char read_key_one[11] = {0};
int i_data_number = 0;
unsigned int key_value = 0;
//*----------------------------------------------------------------------------
//* Function Name       : key_interrupt_handle
//* Object              : Software interrupt function
//* CLK 
//*----------------------------------------------------------------------------
void f6_delay(int num){
int i= 0;
 for ( i = 0 ;i < num;i++ ) ;
}

void key_interrupt_handle(void){
	unsigned char read_data = 0;
	int dummy;
	int i = 0;
	
	AT91F_PIO_InterruptDisable(AT91C_BASE_PIOA,KEY_CLK);
	no_INT0_time = 0;
	while(1){
		//等待时钟端口为高电平
		while((AT91F_PIO_GetInput(AT91C_BASE_PIOA) & KEY_CLK)==0);
		
		//读数据端口
		read_data = (AT91F_PIO_GetInput(AT91C_BASE_PIOA) & KEY_DATA)>>22;
		i_data_number++;
		//if(read_data)key_value|=(1<<(11-i_data_number));
		read_key_one[i_data_number-1] = read_data;

		if(i_data_number == 11)break;
		//等待时钟端口为低电平
		while((AT91F_PIO_GetInput(AT91C_BASE_PIOA) & KEY_CLK)==KEY_CLK);
	}
	for(i=0;i<11;i++){
		sprintf(strprint,"read_key_one[%x]=%x\r\n",i,read_key_one[i]);
		AT91F_DBGU_Printk(strprint);
	}
	AT91F_DBGU_Printk("\r\nMASK:");
	//key_value = 0;
	//* enable the next PIO IRQ
  	dummy =AT91D_BASE_PIO_LED->PIO_ISR;
      //* suppress the compilation warning
      dummy =dummy;

	i_data_number = 0;
}

//*----------------------------------------------------------------------------
//* Function Name       : delay
//* Object              : Wait
//*----------------------------------------------------------------------------
void delay ( void )
{
//* Set in Volatile for Optimisation
    volatile unsigned int    i ;
//* loop delay
    for ( i = 0 ;(i < WAIT_TIME/100 );i++ ) ;
}

//*----------------------------------------------------------------------------
//* Function Name       : main
//* Object              : Main interrupt function
//*----------------------------------------------------------------------------
int main( void )
//* Begin
{

    	AT91PS_AIC     pAic;

    //* Load System pAic Base address
        pAic = AT91C_BASE_AIC;

    //* Enable User Reset and set its minimal assertion to 960 us
        AT91C_BASE_RSTC->RSTC_RMR = AT91C_RSTC_URSTEN | (0x4<<8) | (unsigned int)(0xA5<<24);

	//add by suminhua 2007-5-29 for debug
	 AT91F_DBGU_Init();
	 AT91F_DBGU_Printk("START:\r\n");
    // First, enable the clock of the PIO for led and PIO for Switch
        AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91D_ID_PIO_LED ) ;

   	 AT91F_PIO_CfgInput(AT91D_BASE_PIO_LED,INPUT);
        AT91F_PIO_InputFilterEnable(AT91D_BASE_PIO_LED,INPUT);
    	 AT91F_AIC_ConfigureIt ( pAic, AT91C_ID_PIOA,
	                                  PIO_INTERRUPT_LEVEL,
	                                  AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
	                                  key_interrupt_handle);
   	AT91F_PIO_InterruptDisable(AT91D_BASE_PIO_LED,KEY_CLK);
  	AT91F_AIC_EnableIt (pAic, AT91C_ID_PIOA);
	timer_init();
	while(1);
	return 0;
}