stm32f103c8t6使用数码管显示
买的74hc595四位数码管模块送的arduino程序不对，现修改如下：接线：
模块 stm32f103c8t6开发板
GND -----------------GND
VCC----------------------5V
SCLK -------------------PB9;
RCLK -------------------PB8;
DAT ---------------------PB7;
重要的一点是，先串行输入地址，然后串行输入显示的数据，完整程序如下，复制便可以运行：
unsigned char LED_0F[] =
{// 0 1 2 3 4 5 6 7 8 9 A b C d E F -
0xc0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8e,0xbf
};
unsigned char LED; //用于LED的4位显示缓存
int SCLK = PB9;
int RCLK = PB8;
int DIO = PB7; //这里定义了那三个脚
void setup ()
{
pinMode(SCLK,OUTPUT);
pinMode(RCLK,OUTPUT);
pinMode(DIO,OUTPUT); //让三个脚都是输出状态
LED=9;
LED=6;
LED=7;
LED=8;
}
void loop()
{
LED4_Display ();
}
void LED4_Display (void)
{
unsigned char *led_table; // 查表指针
unsigned char i;
//显示第1位
led_table = LED_0F + LED;
i = *led_table;
LED_OUT(0x01);
LED_OUT(i);
digitalWrite(RCLK,LOW);
digitalWrite(RCLK,HIGH);
//显示第2位
led_table = LED_0F + LED;
i = *led_table;
LED_OUT(0x02);
LED_OUT(i);
digitalWrite(RCLK,LOW);
digitalWrite(RCLK,HIGH);
//显示第3位
led_table = LED_0F + LED;
i = *led_table;
LED_OUT(0x04);
LED_OUT(i);
digitalWrite(RCLK,LOW);
digitalWrite(RCLK,HIGH);
//显示第4位
led_table = LED_0F + LED;
i = *led_table;
LED_OUT(0x08);
LED_OUT(i);
digitalWrite(RCLK,LOW);
digitalWrite(RCLK,HIGH);
}
void LED_OUT(unsigned char X)
{
unsigned char i;
for(i=8;i>=1;i--)
{
if (X&0x80)
{
digitalWrite(DIO,HIGH);
}
else
{
digitalWrite(DIO,LOW);
}
X<<=1;
digitalWrite(SCLK,LOW);
digitalWrite(SCLK,HIGH);
}
}
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