spi0.c

我用ARM写的一些东西

#include "config.h"
/*********************************************************************************************************/


 

/********************************************************************************************************
** 函数名称：MSPI_SendData()
** 函数功能：向SPI总线发送数据。
** 入口参数：data   待发送的数据
** 出口参数：返回值为读取的数据
********************************************************************************************************/
uint8 Hc595Dat;

void MSPI_SendData(uint8 data)
{  
	uint8 i;
	//DisTm0;
	//DisTm1;
	//DisI2C0;
	//DisUart1;
    			        // 片选74HC595
   
   	for (i=8;i>0;i--)
	{
		
		IO1CLR = HC595_CS;IO1CLR = HC595_CS;IO1CLR = HC595_CS;
	 	if ((data&0x80)==0x80)
	 	{
	 		IO0SET = HC595_DAT;IO0SET = HC595_DAT;IO0SET = HC595_DAT;
	 		IO0SET = HC595_DAT;IO0SET = HC595_DAT;IO0SET = HC595_DAT;
	 	}
	 	else
	 	{
	 		IO0CLR = HC595_DAT;IO0CLR = HC595_DAT;IO0CLR = HC595_DAT;
	 		IO0CLR = HC595_DAT;IO0CLR = HC595_DAT;IO0CLR = HC595_DAT;
	 	}
	 	
 	   	IO0CLR =HC595_CLK;IO0CLR =HC595_CLK;IO0CLR =HC595_CLK;
   	   	IO0SET =HC595_CLK;IO0SET =HC595_CLK;IO0SET =HC595_CLK;
   	   	data<<=1;
	 	
	}	
	

   	
   // SPI_SPDR = data;
   // while( 0 == (SPI_SPSR & 0x80));		// 等待SPIF置位，即等待数据发送完毕
    
    IO1SET = HC595_CS;IO1SET = HC595_CS;IO1SET = HC595_CS; 
    
	//EnTm0;
	//EnTm1;
	//EnI2C0;
	//EnUart1;
    
   // return(SPI_SPDR);
}

void SetAmp(uint8 dat)
{
	uint8 Amp;

	
	switch (dat) //1 :1m ;2:10m ;3 :1km
	{
		case 1:
			Hc595Dat =  (Hc595Dat);
			Amp=1;//放大倍数最小
		break;
		case 2: 
			Hc595Dat =  (Hc595Dat&0xfe);
			Amp=1<<1;
		break;
		case 3: 
			Hc595Dat =  (Hc595Dat&0xfc);
			Amp=1<<2;
		break;	
		default :
			Hc595Dat =  (Hc595Dat&0xf8);
			Amp=0;
		break;			
	}
	Hc595Dat =  (Hc595Dat)|(Amp);
	Hc595Dat=Hc595Dat | 0x40; //关AD的CS			
		
	 MSPI_SendData(Hc595Dat);
	 
				
}
void Cs7705(uint8 dat)
{
	if(dat==1)
	{
		Hc595Dat=Hc595Dat | 0x40;
		//Hc595Dat=Hc595Dat|0x20;
	}
	else
	{
		Hc595Dat=Hc595Dat & 0xbf;
		//Hc595Dat=Hc595Dat|0x20;
	}
	MSPI_SendData(Hc595Dat);
		
}


void Set5628Ld(uint8 LD) 
{
	if(LD==1)
	{
		Hc595Dat=Hc595Dat|0x20;
		Hc595Dat=Hc595Dat | 0x40;//关AD的CS
		//IO1SET=DA_CLK;
	}
	else
	{
		Hc595Dat=Hc595Dat&0xdf;
		Hc595Dat=Hc595Dat | 0x40;//关AD的CS
	}
	MSPI_SendData(Hc595Dat);

}