4-江科大-数码管

目录

正文

image-20240417231234367

四位一体数码管

image-20240418215149316

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/*
 静态数码管显示
*/
void main(){

	
	P2_4 = 1;
	P2_3 = 0;
	P2_2 = 1;
	P0 = 0x7d;
	
	while(1){
		
		
	}
}

封装：

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/*
	@authro leoeric
	@param location
	@param number
	@return null
	@description 
*/
unsigned char NixieTable[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void showNixieTube(unsigned char location,number){
	switch(location){
		case 1: P2_4 = 1;P2_3 = 1;P2_2 = 1;break;
		case 2: P2_4 = 1;P2_3 = 1;P2_2 = 0;break;
		case 3: P2_4 = 1;P2_3 = 0;P2_2 = 1;break;
		case 4: P2_4 = 1;P2_3 = 0;P2_2 = 0;break;
		case 5: P2_4 = 0;P2_3 = 1;P2_2 = 1;break;
		case 6: P2_4 = 0;P2_3 = 1;P2_2 = 0;break;
		case 7: P2_4 = 0;P2_3 = 0;P2_2 = 1;break;
		case 8: P2_4 = 0;P2_3 = 0;P2_2 = 0;break;
	}
	P0 = NixieTable[number];
	
}
/*
 静态数码管显示
*/
void main(){
	showNixieTube(7,2);
	while(1){
		
	}
}

动态显示多位数码管

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unsigned char NixieTable[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
void showNixieTube(unsigned char location,number){
	switch(location){
		case 1: P2_4 = 1;P2_3 = 1;P2_2 = 1;break;
		case 2: P2_4 = 1;P2_3 = 1;P2_2 = 0;break;
		case 3: P2_4 = 1;P2_3 = 0;P2_2 = 1;break;
		case 4: P2_4 = 1;P2_3 = 0;P2_2 = 0;break;
		case 5: P2_4 = 0;P2_3 = 1;P2_2 = 1;break;
		case 6: P2_4 = 0;P2_3 = 1;P2_2 = 0;break;
		case 7: P2_4 = 0;P2_3 = 0;P2_2 = 1;break;
		case 8: P2_4 = 0;P2_3 = 0;P2_2 = 0;break;
	}
	P0 = NixieTable[number];
	
}
/*
 动态数码管显示
*/
void main(){
	
	while(1){
		showNixieTube(3,5);
		showNixieTube(2,3);
		showNixieTube(1,6);
		showNixieTube(4,7);
	}
}

问题

数码管消影问题：在快速切换时，数码管上一位数据会串到下一位数据

把段选清零

delay 1 毫秒，然后清零

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DelayMs(1);
P0 = 0x00;

image-20240418223449543

TODO

多位显示数码管原理