button.c

ATMEL ATSAM7S64处理器部分控制程序。

/*********************************************************************************************
* File：	button.c
* Author:	Embest z.j.zheng
* Desc：	button test
* History:	
*********************************************************************************************/
/*------------------------------------------------------------------------------------------*/
/*								include files												*/
/*------------------------------------------------------------------------------------------*/
#include "Board.h"

/*------------------------------------------------------------------------------------------*/
/*							 Global variables 												*/
/*------------------------------------------------------------------------------------------*/
int status_irq = 0 ;
/* Digit Symbol table*/
int Symbol[] = { DIGIT_0, DIGIT_1, DIGIT_2, DIGIT_3, DIGIT_4, DIGIT_5, DIGIT_6, DIGIT_7,
    			 DIGIT_8, DIGIT_9, DIGIT_A, DIGIT_B, DIGIT_C, DIGIT_D, DIGIT_E, DIGIT_F};
/* LED segment table */
int Seg[] = { SEGMENT_A, SEGMENT_B, SEGMENT_C, SEGMENT_D, SEGMENT_E, SEGMENT_F, SEGMENT_G, SEGMENT_P};

/*------------------------------------------------------------------------------------------*/
/*								constant definition											*/
/*------------------------------------------------------------------------------------------*/
#define IRQ0_INTERRUPT_LEVEL	2

/*********************************************************************************************
* name:		sys_init
* func:		init the sys
* para:		none
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void  SPI_init()
{	
	AT91F_SPI_Open(0);
	AT91F_SPI_CfgCs(AT91C_BASE_SPI,0,(AT91C_SPI_BITS_8 | AT91C_SPI_CSAAT | AT91C_SPI_NCPHA | AT91C_SPI_SCBR));
	AT91F_SPI_CfgMode(AT91C_BASE_SPI,AT91C_SPI_MSTR);
	AT91F_SPI_DisableIt(AT91C_BASE_SPI,0x3f);                      // Disable SPI interrupt					                   
	AT91F_SPI_Enable(AT91C_BASE_SPI);                              // Enable SPI
}

/*********************************************************************************************
* name:		spi_send
* func:		spi bus send byte
* para:		chr		--in,	send value
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void spi_send(char chr)			
{
	AT91F_SPI_PutChar(AT91C_BASE_SPI,chr,0);                       //send a byte 
}

/*********************************************************************************************
* name:		time_dly
* func:		display code
* para:		dly			--in, delay value
* ret:		none
* modify:
* comment:		
*********************************************************************************************/
void  time_dly(int  dly)
{  
	int  i;

	for(; dly>0; dly--) 
		for(i=0; i<500; i++);
}

/*********************************************************************************************
* name:		Main
* func:		main fun
* para:		none
* ret:		none
* modify:
* comment:	
*********************************************************************************************/
int  Main(void)
{
	int i;
	AT91PS_AIC     pAic;
                                                                
	AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91C_ID_PIOA ) ;
	AT91F_SPI_CfgPIO();
	AT91F_SPI_CfgPMC();
	SPI_init();
	
	//configure PIO (connect to the buttons) in input mode		
	AT91F_PIO_CfgInput( AT91C_BASE_PIOA, SW_MASK );               

	do {
		i= AT91F_PIO_GetInput(AT91C_BASE_PIOA);                       //get the input value of the button
		if((i&SW1) == 0) spi_send(~Symbol[1]);                        //detect which is push down
		else if((i&SW2) == 0) spi_send(~Symbol[2]);
		else if((i&SW3) == 0) spi_send(~Symbol[3]);
		else if((i&SW4) == 0) spi_send(~Symbol[4]);
		} while(1);
}