cd4094.c

ch451键盘LED管理芯片的驱动程序,很好用的,设计很标准的代码

/*
*****************************
**filename:CD4094.C
*****************************
*/
#include "CD4094.h"
#include "hardware.h"


static unsigned char Value1_4094=0xff;
static unsigned char Value2_4094=0xff;

void Set1BitMask4094(unsigned char BitMask);
void Clear1BitMask4094(unsigned char BitMask);

void Set2BitMask4094(unsigned char BitMask);
void Clear2BitMask4094(unsigned char BitMask);

/////////////////////////////////
//4094_SPI WRITE
void Write4094(unsigned char ch)
{
	unsigned char xdata i;

        WatchDog();

        NOP;NOP;NOP;
        NOP;NOP;NOP;
	for(i=0;i<8;i++)
	{
                WatchDog();

		if(ch&0x80)Set573Bit(SI_4094);  //SI_4094=1;
		else	   Clear573Bit(SI_4094);//SI_4094=0;
		NOP;NOP;NOP;
                NOP;NOP;NOP;
		Clear573Bit(SCK_4094);          //SCK_4094=0;
                NOP;NOP;NOP;
                NOP;NOP;NOP;
		Set573Bit(SCK_4094);            //SCK_4094=1;
                ch = (ch<<1);
                NOP;NOP;NOP;
                NOP;NOP;NOP;
	}
        NOP;NOP;NOP;
        NOP;NOP;NOP;
}


void Set1BitMask4094(unsigned char BitMask)
{
        WatchDog();

        HC138_YN=0;

	Value1_4094|=BitMask;
	Write4094(Value1_4094);

	STB1_CD4094=1;
	NOP;NOP;
}

void Clear1BitMask4094(unsigned char BitMask)
{
        WatchDog();

        HC138_YN=0;

	Value1_4094&=(~BitMask);
	Write4094(Value1_4094);

	STB1_CD4094=1;
	NOP;NOP;
}

void Set2BitMask4094(unsigned char BitMask)
{
        WatchDog();

        HC138_YN=0;

	Value2_4094|=BitMask;
	Write4094(Value2_4094);

	STB2_CD4094=1;
	NOP;NOP;
}

void Clear2BitMask4094(unsigned char BitMask)
{
        WatchDog();

        HC138_YN=0;

	Value2_4094&=(~BitMask);
	Write4094(Value2_4094);

	STB2_CD4094=1;
	NOP;NOP;
}


void SelectPlayAddr(unsigned char addr)
{
        WatchDog();

        HC138_YN=0;

	Write4094(addr|0X01);

	STB2_CD4094=1;
	NOP;NOP;
}


void SelectChip(unsigned char ch)
{
        WatchDog();

	switch(ch)
	{
		case SEL_X5045 :
                        Set573Bit(AT45LIB_CS|AT45REC_CS);
			Set1BitMask4094(CH451_CS);
			Clear1BitMask4094(DS1302_CS);
                        X5045_CS=0;
			break;
		case SEL_AT45LIB:
                        X5045_CS=1;
                        Set573Bit(AT45REC_CS);
			Set1BitMask4094(CH451_CS);
			Clear1BitMask4094(DS1302_CS);
                        Clear573Bit(AT45LIB_CS);
			break;
                case SEL_AT45REC:
                        X5045_CS=1;
                        Set573Bit(AT45LIB_CS);
			Set1BitMask4094(CH451_CS);
			Clear1BitMask4094(DS1302_CS);
                        Clear573Bit(AT45REC_CS);
			break;
		case SEL_CH451:
                        X5045_CS=1;
                        Set573Bit(AT45LIB_CS|AT45REC_CS);
			Clear1BitMask4094(CH451_CS|DS1302_CS);
			break;
                case SEL_DS1302:
                        X5045_CS=1;
                        Set573Bit(AT45LIB_CS|AT45REC_CS);
			Set1BitMask4094(CH451_CS);
			Set1BitMask4094(DS1302_CS);
			break;
		case SEL_NULL:
                        X5045_CS=1;
                        Set573Bit(AT45LIB_CS|AT45REC_CS);
			Set1BitMask4094(CH451_CS);
                        Clear1BitMask4094(DS1302_CS);
			break;
		default:
                        X5045_CS=1;
                        Set573Bit(AT45LIB_CS|AT45REC_CS);
			Set1BitMask4094(CH451_CS);
                        Clear1BitMask4094(DS1302_CS);
			break;
	}

}