1621 me_c.c

这是本人写的HT1621显示驱动！是用PICC语言写的

#include "pic.h"
#define nop() asm("NOP")
#define lcd_cs RA5
#define lcd_data RB2
#define lcd_clk RB4
#define RC256 0x18     //系统时钟选择为片内RC振荡器
#define XTAL32K 0x14   //系统时钟选为外部晶振
#define SYSEN 0x01     //打开系统时钟
#define LCDON 0x03     //打开偏压发生器
#define BIAS_1_2 0x28  //1/2偏压
#define SYSDIS 0x00    //关闭系统时钟和偏压发生器
//void send_com(unsigned char command);
//void send_bit(unsigned char data,unsigned char bitcnt);

/*void delay1s()
{
 unsigned char i;
 unsigned int j;
 for(i=0;i<10;i++)
    for(j=0;j<1300;j++);
}*/

void lcd_init(void)
{
	lcd_cs=0;
	lcd_clk=1;
	nop();
	lcd_clk=0;
	nop();   
}

void send_bit(unsigned char data,unsigned char bitcnt)
{
	unsigned char i;
	for(i=bitcnt;i>0;--i)
	   {
	   	if(data&0x80)
	   	     lcd_data=1;
	   	else lcd_data=0;
	   	lcd_clk=1;
	   	nop();
	   	nop();    
	   	lcd_clk=0;
	   	nop();
	   	nop();
	   	#asm
	   	    RLF _data,1
	   	    MOVLW 0x01
	   	    ANDWF _data,1
	   	#endasm
	   //   data<<=1;
           }  
}

void send_com(unsigned char command)
{
	lcd_init();
	send_bit(0x80,4);
	send_bit(command,8);
	lcd_clk=1;
	lcd_cs=1;
	lcd_data=1;
}

void init_ht1621(void);
{
	unsigned char com;
	com=BIAS;
	send_com(com);
	com=RC256;
	send_com(com);
	com=SYSEN;
	send_com(com);
	com=LCDON;
	send_com(com);
}

void main()
{
	unsigned char j;
	TRISA=0xdf;
	TRISB=0xeb;
	init_ht1621();
	send_com(0xa0,4);
	send_com(0x00,5);
	for(j=16;--j;)
	    send_com(0xff,8);
}