spi.c

该代码采用LPC2132嵌入式单片机实现ISD4003语音芯片报警功能

 #include <LPC213x.H>
 #include <stdio.h>
  #include "SPI.h"
 #include "TIME_DELAY.h"
  void VOICE_init(void)
  {
    IO1DIR |=VOICE_SS;
	IO0DIR |=VOICE_SCLK;
	IO0DIR |=VOICE_MOSI;
	IO0DIR |=VOICE_MISO;

  }
  void POWER_up(void)
  {		 
     
   	 	VOICE_write_byte(0x20);
		IO1SET= VOICE_SS;
		delay_nms(10);

  }
 void VOICE_write_byte(unsigned char dat )
  {
    unsigned char i;
	  IO1CLR= VOICE_SS;  //开语音芯片
      IO0CLR= VOICE_SCLK;
		for(i=0;i<8;i++)
		{
			if(dat&0x01)
			 
				IO0SET=VOICE_MOSI;
			else
			 
				IO0CLR=VOICE_MOSI;
 
			IO0SET=VOICE_SCLK;
			dat = dat >> 1;
			IO0CLR=VOICE_SCLK;
		}
 
    
  }

 /*注意：要把地址反过来写*/
void VOICE_play(unsigned  int n)
{
     unsigned char HIGH_ADD=0xe0;
	 unsigned char   LOW_ADD=0x00;
	POWER_up();
   	VOICE_write_byte(LOW_ADD+n);	  //传送低地址
	HIGH_ADD+=0x00;
	VOICE_write_byte(HIGH_ADD);	   //传送高地址

	 IO1SET= VOICE_SS;
	VOICE_write_byte(0xf0);
	 IO1SET= VOICE_SS;

	 

}

void  Consecutive_play()
{
  	VOICE_write_byte(0xf0);
	 IO1SET= VOICE_SS;
}