scan.c

电机测速程序,用nec芯片,5mhz晶振,调试通过

#define SUBRAM
#include "ram.c"
/*P0.0-P0.3->低4位*/
/*P5.0-P5.3->高4位*/
/*0->开,1->关*/
const unsigned char Dig_tab[]   = { 0b11000000,0b11111100,0b01010010,0b01010100,
									0b01101100,0b01000101,0b01000001,0b11001100,
									0b01000000,0b01000100,0b01001000,0b01100001,
									0b11000011,0b01110000,0b01000011,0b01001011};

void openDig0(),openDig1(),openDig2(),openDig3(),dig_off();
/*---------------------------------*/
void openDig0()
{
    dig4 = 1;  
    dig2 = 1;  
    dig3 = 1;
	dig1 = 0;
}
void openDig1()
{
	dig1 = 1;
    dig3 = 1;
    dig4 = 1;  
    dig2 = 0;
}
void openDig2()
{
	dig1 = 1;
    dig2 = 1;
    dig4 = 1;  
    dig3 = 0;
}
void openDig3()
{
	dig1 = 1;
    dig2 = 1;
    dig3 = 1;  
    dig4 = 0;
}

void dig_off()
{
	dig1 = 1;	/*数码管*/
    dig2 = 1;	/*数码管*/
    dig3 = 1;	
    dig4 = 1;	
}
/*-------------------------*/
/*传递参数：
	data_showL
	data_showh
	led_show
*/
/*-------------------------*/
void LEDscan()
{	
	if (++TmsCnt >= 2) /*led扫描时间:2*1ms = 2ms*/
	{
		TmsCnt = 0x00;							

		if (++show_cnt >= 4)   /*show_cnt之前已清0,++后为1*/
		{
			show_cnt = 0x00;
		}		
			
		dig_off();	/*送数前先关显示*/

		switch(show_cnt)
		{
			case 0:
				send_byte = Dig_tab[show_buff[show_cnt]];				
				P0 = (P0 | 0x0f) & (send_byte | 0xf0); 
				P5 = (P5 | 0x0f) & ((send_byte >> 4) | 0xf0); 
				openDig0();				
			break;
			case 1:
				send_byte = Dig_tab[show_buff[show_cnt]];				
				P0 = (P0 | 0x0f) & (send_byte | 0xf0); 
				P5 = (P5 | 0x0f) & ((send_byte >> 4) | 0xf0); 
				openDig1();				
			break;
			case 2:
				send_byte = Dig_tab[show_buff[show_cnt]];				
				P0 = (P0 | 0x0f) & (send_byte | 0xf0); 
				P5 = (P5 | 0x0f) & ((send_byte >> 4) | 0xf0); 
				openDig2();				
			break;
			default:
				send_byte = Dig_tab[show_buff[show_cnt]];				
				P0 = (P0 | 0x0f) & (send_byte | 0xf0); 
				P5 = (P5 | 0x0f) & ((send_byte >> 4) | 0xf0); 
				openDig3();				
			break;
		}
	}	
}
/*-------------------------*/