spi.c

来自「adi bf54x 通过spi接口读取memory程序」· C语言 代码 · 共 45 行

//#include <sys/io.h>
#include <cdefBF549.h>
#include <stdio.h>
#include <string.h>
#include <sys\exception.h>
#include "spi.h"
#include "type.h"
#define INT32U unsigned int 
#define INT8U unsigned char 
#define TIMOD_DMA_TX 0x0003
#define TIMOD_DMA_RX 0x0002
#define TIMOD_T		 0x0001
#define TIMOD_R		 0x0000


//& (~0x0400);

int spi_init(void)
{	
	
	*pPORTE_FER	=	0x1f;
	*pPORTE_MUX	=	0x0000;
	
	*pSPI0_FLG = 0x0002;	//选择SPI0SEL1
	*pSPI0_BAUD = 2;
	*pSPI0_CTL = TIMOD_T | MSTR | CPHA |CPOL;
	*pSPI0_CTL = (*pSPI0_CTL | SPE);
	SPIflash_SEL();
	return 0;
}




uint8 spi_byte_rw(uint8 value)
{
	uint8 incoming=0;	
	while(!(*pSPI0_STAT & SPIF));
	*pSPI0_TDBR = value;
	while(*pSPI0_STAT & RXS)
	incoming = *pSPI0_RDBR;
	return(incoming);	
}