（六）Proteus仿真STM32单片机控制8x8LED显示

1，配置CUBEMX,将PA0~7,PAB0~7配置为GPIO OUTPUT模式

2,GPIOA负责8bit数据,高电平有效，GPIOB负责行选则，低电平有效，编写行刷新函数

void disp_set_row(unsigned char dat,char sel)
{
	GPIOB->ODR=0xff;//关闭行选，防止将数据显示到旧行产生重影
	GPIOA->ODR=dat;//更新数据
	switch(sel)//打开新行
	{
		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;
	}
}
3,定义一个显示缓冲区屏幕是8x8=64bit,需要定义一个长度为8的uchar数组，编写扫描点阵驱动函数，此函数需要定义3~10ms调用一次，实现逐行点亮LED

unsigned char dispbuff[8];
void disp_scan()
{
	static char scan=0;
	disp_set_row(dispbuff[scan],scan);
	scan++;
	if(scan>=8)
		scan=0;
}

4，定义显示的图形,并且每次调用更换图形，此函数需要定时100ms以上调用一次，防止图形切换太快影子重叠。

unsigned char pic1[8]={0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,};
unsigned char pic2[8]={0xff,0x81,0x81,0x81,0x81,0x81,0x81,0xff,};
unsigned char pic3[8]={0x0,0x7e,0x42,0x42,0x42,0x42,0x7e,0x0,};
unsigned char pic4[8]={0x0,0x0,0x3c,0x24,0x24,0x3c,0x00,0x0,};
unsigned char pic5[8]={0x0,0x0,0x00,0x18,0x18,0x00,0x00,0x0,};
unsigned char pic6[8]={0x00,0x00,0x00,0x0,0x0,0x0,0x0,0x0,};
void disp_pic_switch()
{
	static char sel=0;
	switch(sel)
	{
		case 0:memcpy(dispbuff,pic1,8);break;
		case 1:memcpy(dispbuff,pic2,8);break;
		case 2:memcpy(dispbuff,pic3,8);break;
		case 3:memcpy(dispbuff,pic4,8);break;
		case 4:memcpy(dispbuff,pic5,8);break;
		case 5:memcpy(dispbuff,pic6,8);break;
	}
	sel++;
	if(sel>=6)
		sel=0;
}

git源码：https://gitee.com/armfun/stm32_proteus