CH451驱动LED数码管单片机C语言实例程序

CH451能够一次性驱动8位数码管，与单片机串行通信。支持数码管的左移，右移，左循环，右循环，独立闪烁，16级亮度控制等功能。是单片机控制多个数码管的得力助手，现将MEGA16单片机（MEGA16是AVR单片机，改程序稍加修改可以应用到8051单片机，PIC单片机，MSP430单片机上）驱动CH451的程序发布，希望能有所用。CH451的详细资料可去官方网站下载。

//包含CH451所需头文件

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/*------宏定义------*/

#define uchar unsigned char

#define uint unsigned int

#define ch451din PORTB

#define ch451dclk0 PORTB&=~BIT(PB1)

#define ch451dclk1 PORTB|=BIT(PB1)

#define ch451load0 PORTB&=~BIT(PB2)

#define ch451load1 PORTB|=BIT(PB2)

#define ch451dout0 PORTB&=~BIT(PB3)

#define ch451dout1 PORTB|=BIT(PB3)

//CH451复位

#define CH451_RESET 0x0201

//设置移动方式-作移、左循、右移、右循

#define CH451_LEFTMOV 0x0300

#define CH451_LEFTCYC 0x0301

#define CH451_RIGHTMOV 0x0302

#define CH451_RIGHTCYC 0x0303

//设置BCD译码方式

#define CH451_BCD 0x0580

//设置数码管闪烁控制

#define CH451_TWINKLE 0x0600

//数码管各位显示

#define CH451_DIG0 0x0800

#define CH451_DIG1 0x0900

#define CH451_DIG2 0x0a00

#define CH451_DIG3 0x0b00

#define CH451_DIG4 0x0c00

#define CH451_DIG5 0x0d00

#define CH451_DIG6 0x0e00

#define CH451_DIG7 0x0f00

//CH451初始化

void ch451_init()

{

ch451din=0;

ch451din=1;

}

//输出命令子程序

//定义一个无符号整型变量存储12字节的命令字

void ch451_write(uint command)

{

uchar i;

ch451load0;

for(i=0;i<12;i++)

{

ch451din=command&1;

ch451dclk0;

ch451dclk1;

command>>=1;

}

ch451load1;

}

//CH451端口初始化

void port_init(void)

{

PORTA = 0x00;

DDRA = 0x00;

PORTB = 0x07;

DDRB = 0x07;

PORTC = 0x00;

DDRC = 0x00;

PORTD = 0x00;

DDRD = 0x00;

}

//单片机C语言主函数

void main(void)

{

port_init();

ch451_init();

ch451_write(CH451_RESET);

ch451_write(0x401);

ch451_write(0x580);

ch451_write(0x600);

ch451_write(CH451_DIG0|0x08);

while(1)

{}

}