spi_test.c

ATMEL ATSAM7S64处理器部分控制程序。

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

/*------------------------------------------------------------------------------------------*/
/*							 Global variables 												*/
/*------------------------------------------------------------------------------------------*/
/* 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};

/*********************************************************************************************
* 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
	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()
{//* Begin
    int i;
    // First, enable the clock of the PIO
       AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1 << AT91C_ID_PIOA ) ;
	AT91F_SPI_CfgPIO();
	AT91F_SPI_CfgPMC();
	
	SPI_init();
    spi_send(0);

    for (;;)
    {
    for(i=0;i<16;i++)
		{spi_send(~Symbol[i]);                                 // 8seg-led display number from 0 to f
	    time_dly(1000);
	   }
	  time_dly(4000); 
    }
}