1，参考上篇，将LED点阵屏更换成数码管如下图

2，修改驱动函数，数组seg[14]前10个是0-9数字的编码，后四个是空格，点，横线，下划线

char seg_decode(char num)//数字解码
{
	const char seg[14]={0xC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,  0xff,0x7f,0xbf,0xf7};
	return seg[num];
}
void disp_set_row(unsigned char dat,char sel)//单个数码管显示
{
	GPIOB->ODR=0xff;
	GPIOA->ODR=~seg_decode(dat);
	switch(sel)
	{
		case 0:GPIOB->ODR=0xfe;break;
		case 1:GPIOB->ODR=0xfd;break;
		case 2:GPIOB->ODR=0xfb;break;
		case 3:GPIOB->ODR=0xf7;break;
		case 4:GPIOB->ODR=0xef;break;
		case 5:GPIOB->ODR=0xdf;break;
		case 6:GPIOB->ODR=0xbf;break;
		case 7:GPIOB->ODR=0x7f;break;
	}
}
unsigned char dispbuff[8];
void disp_scan()//定时刷新函数，毫秒级调用
{
	static char scan=0;
	disp_set_row(dispbuff[scan],scan);
	scan++;
	if(scan>=8)
		scan=0;
}
char char_decode(char ch)//字符解码
{
	if((ch>='0')&&(ch<='9'))
		return ch-'0';
	else if(ch == ' ')
		return 10;
	else if(ch =='.')
		return 11;
	else if(ch =='-')
		return 12;
	else if(ch =='_')
		return 13;
	else 
		return 10;
}
void disp_string(char *str)//字符串显示
{
	char len = strlen(str);
	char i;
	if(len>8)
		len=8;
	memset(dispbuff,10,8);
	for(i=0;i<len;i++)
	{
		dispbuff[i]=char_decode(str[i]);
	}
}

void key1_action()//更新屏幕字符
{
	disp_string("1.4 -2_5");
}
void key2_action()//更新屏幕字符
{
	disp_string("12-30-00");
}

git源码：stm32_proutes: Protues仿真STM32单片机教程源码-WWW.ARMFUN.CN