mini51b_driver.c

基于Mini51板的数字示波器设计

#include "Mini51B.H"   	//所有与硬件相关的接口函数定义

/*ADC1549数据读取，首次无效*/
//读取ADC结果函数
unsigned int read_adc(void)
{
  unsigned char i;  
  unsigned int temp=0; 
  ADC_CS = 0;			//开启控制电路，使能DA和CK IO引脚
  for(i=0;i<10;i++) {  	//采集10次 ，即10bit
    ADC_CK = 0;        
    temp <<= 1;
    if(ADC_DA) temp++;  
    ADC_CK = 1;
  }
  ADC_CS = 1;
  return(temp);
}

/*DAC5615数据写入函数/
void write_dac(uint da)
{
  uchar i;
  da <<= 6;//10有效数据左对齐
  DAC_CS = 0;
  DAC_CK = 0;
  for (i=0;i<12;i++)
  {
    DAC_DA = (bit)(da & 0x8000);
    DAC_CK = 1;
    da <<= 1;
    DAC_CK = 0;
  }
  DAC_CS = 1;
  DAC_CK = 0;
}//*/

//通用数码管显示函数，传入数据0～9999
void seg7_disp(uint number)
{
	unsigned char code tab1[20]= {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,};
	unsigned char temp,flag=0;

	if(number < 10000)
	{		
		//千位数码管
		temp = number/1000%10;
		if (temp) {
			SEG_Q = tab1[temp];
			flag = 1;	
		}
		else {
			SEG_Q = 0xff;//数码管熄灭
			flag = 0;	
		}

		//百位数码管
		temp = number/100%10;	
		if(flag | temp)	{
			SEG_B = tab1[temp];
			flag = 1;	
		}
		else {
			SEG_B = 0xff;//数码管熄灭
			flag = 0;	
		}					
		
		//十位数码管
		temp = number/10%10;
		if(flag | temp) SEG_S = tab1[temp];		
		else SEG_S = 0xff;//数码管熄灭		
		
		//个位数码管
		temp = number%10;	
		SEG_G = tab1[temp];
	}
	else {
		SEG_Q = 0xbf;//"-"
		SEG_B = 0xbf;
		SEG_S = 0xbf;
		SEG_G = 0xbf;	
	} 
}//*/

//延时nms子程序，
void delay_ms(unsigned int n)
{
     unsigned char j;
     while(n--)
     for(j=0;j<230;j++);//230是实验测试所得！
/*
参数n>0;
延时  1ms：delay_ms(1);
延时 11ms：delay_ms(11);
……
*/
}