spi.c

AD9958arm控制源程序

/*------------------------------------------------------
FILE NAME   : spi.c
DESCRIPTION : lpc2132 spi driver 
VERSION     : 0.0.0 (C)aureole
AUTHOR      : Aureole
CREATE DATE : 4.1.2006
MODIFY DATE : ---
LOGS        :-\ 
1. First create for hardware test. 4.1.2006


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

//-------------Include Files----------------------------//
#include "..\include\spi.h"
#include "..\include\config.h"
#include "..\include\common.h"

//-------------Function area--------------------------//
/*---------------------------------------------------------------
NAME       : initialize_master_spi
ENTRY  TYPE: void
RETURN TYPE: void
PURPOSE    : ---
VERSION    : 0.1
DESCRIPTION:
CREATE DATE: 4.1.2006
LOGS       : 1.first create;
-----------------------------------------------------------------*/
void initialize_master_spi(void)
{

	PINSEL0|=0x00005500; //Set PIN Connect SPI Function;

	S0SPCCR=0X8; //Set SPI Clock;SPCCR bit0 MUST BE SET 0,AND SPCCR MUST >=8;

	S0SPCR=(0<<3)|				// CPHA = 0, 数据在SCK 的第一个时钟沿采样
		(0<<4)|				// CPOL = 1, SCK 为低有效,CPOL = 0, SCK 为高有效
		(1<<5)|				// MSTR = 1, SPI 处于主模式
		(0<<6)|				// LSBF = 0, SPI 数据传输MSB (位7)在先
		(0<<7);				// SPIE = 0, SPI 中断被禁止


}


/*---------------------------------------------------------------
NAME       : send_data_to_spi
ENTRY  TYPE: unsigned char
RETURN TYPE: unsigned char
PURPOSE    : ---
VERSION    : 0.1
DESCRIPTION:
CREATE DATE: 4.1.2006
LOGS       : 1.first create;
-----------------------------------------------------------------*/
unsigned char send_data_to_spi(unsigned char dat)
{
	S0SPDR=dat;
	while(!(S0SPSR&0x80));		// 等待SPIF置位，即等待数据发送完;
	return(S0SPDR);
}