PIC 18f45k80单片机通过HT1621驱动LCD显示

ht1621.c

// SendBit_1621(送数据程序) 
void SendBit_1621(u8 sdata,u8 cnt) //data 的高cnt 位写入HT1621，高位在前 
{ 
	unsigned char i; 
	for (i = 0; i < cnt; i++)
	{
		CLEAR_HT1621_WR();   
		if (sdata & 0x80)
		{
			SET_HT1621_DATA();  
		}
		else
		{
			CLEAR_HT1621_DATA();    	
		}
		SET_HT1621_WR();  
		sdata <<= 1; 
     } 
} 



// SendCmd(送命令) 
void SendCmd_1621(u8 command) 
{ 
    CLEAR_HT1621_CS();          			// 直接将command 的最高位写“0” 
	SendBit_1621(0x80,4);    				// 写入标志码“100”和9 位command 命令，由于 
	SendBit_1621(command,8); 				// 没有使有到更改时钟输出等命令，为了编程方便 
	SET_HT1621_CS();                   
} 

//Write_1621(送数据和命令程序) 
void Write_1621(u8 addr,u8 sdata) 
{ 
	CLEAR_HT1621_CS(); 
	SendBit_1621(0xa0,3);     //写入标志码“101” 
	SendBit_1621(addr,6);     //写入addr 的高6位 
	SendBit_1621(sdata,4);    //写入data 的4位 
	SET_HT1621_CS();  
} 



// all_off(清除1621显示) 
void HT1621_all_off(void) 
{ 
    unsigned char i; 
    u8 addr = 0;
    for (i = 0; i < 32; i++) 
    {       
	Write_1621(addr<<2,0x00); 
	addr++; 
    } 
} 



// all_on(全部点亮1621) 
void HT1621_data(u8 *data,u8 size) 
{ 
    unsigned char i; 
    unsigned char addr = 0; 
    for (i = 0; i < size; i++) 
    {
        Write_1621(addr,data[i]); 
        addr++; 
    } 
} 



// Init_1621(初始化1621) 
void HT1621_init(void)
{
    HT1621_CS_PIN_DIR_OUT();
    HT1621_DATA_PIN_DIR_OUT();
    HT1621_WR_PIN_DIR_OUT();

    SET_HT1621_WR();
    SET_HT1621_CS();  
	
    SendCmd_1621(BIAS);
    SendCmd_1621(RC256);
    SendCmd_1621(SYSEN);
    SendCmd_1621(LCDON);
    SendCmd_1621(TONE2K);
	
    CleraLcdBuffer();                        /// 关闭所有显示
}

ht1621.h

#define HT1621_CS 				(0X01 << 1)
#define HT1621_DATA 			        0X01
#define HT1621_WR 				(0X01 << 3)

#define HT1621_CS_PIN_DIR_OUT()		         TRISC &= ~(HT1621_CS)					// CS管脚设置为输出
#define SET_HT1621_CS() 			 (PORTCbits.RC1 = 1)
#define CLEAR_HT1621_CS() 			 (PORTCbits.RC1 = 0)

#define HT1621_DATA_PIN_DIR_OUT()	         TRISC &= ~(HT1621_DATA)				// DATA管脚设置为输出
#define SET_HT1621_DATA() 			 (PORTCbits.RC0 = 1)
#define CLEAR_HT1621_DATA() 		         (PORTCbits.RC0 = 0)

#define HT1621_WR_PIN_DIR_OUT()		         TRISC &= ~(HT1621_WR)					// WR管脚设置为输出
#define SET_HT1621_WR() 			 (PORTCbits.RC3 = 1)
#define CLEAR_HT1621_WR() 		         (PORTCbits.RC3 = 0)

#define BIAS 	0x52 				// 1/3偏压
#define RC256 	0x30  				// 256k 时钟
#define SYSEN 	0x02  				// 开启系统振荡器
#define SYSDIS 	0x00 				// 关闭系统振荡器
#define LCDON 	0x06 				// 开启LCD偏压产生器
#define LCDOFF 	0x04 				// 关闭LCD偏压产生器
#define TONE4K 	0x80
#define TONE2K 	0xC0

lcd.c

/// 数码管相关数据

static struct ValueTAB const Value[20]=
{
  {_F|_E|_D,_A|_B|_C},		        // 0
  {0,_B|_C},				// 1
  {_E|_D|_G,_A|_B},			// 2
  {_D|_G,_A|_B|_C},			// 3
  {_F|_G,_B|_C},			// 4
  {_F|_D|_G,_A|_C},			// 5
  {_F|_E|_D|_G,_A|_C},		        // 6
  {0,_A|_B|_C},				// 7
  {_F|_E|_D|_G,_A|_B|_C},	        // 8
  {_F|_D|_G,_A|_B|_C},		        // 9
  {_F|_E|_G,_A|_B|_C},		        // a
  {_F|_E|_D|_G,_C},			// b
  {_F|_E|_D,_A},			// c
  {_E|_D|_G,_B|_C},			// d
  {_F|_E|_D|_G,_A},			// e
  {_F|_E|_G,_A},			// f
  {_F|_E|_G,_A|_B},			// P
  {_G,0},				// -
  {0,0}					// null
};

/// 清除屏幕所有显示

void CleraLcdBuffer(void)
{
  u8 i;
  for (i = 0; i< 32; i++)
  {
  	LcdBuffer[i] = 0;
  }
  HT1621_all_off();
}

lcd.h

#define COM4 (0X01<<4)
#define COM3 (0X02<<4)
#define COM2 (0X04<<4)
#define COM1 (0X08<<4)

#define _A COM1
#define _B COM2
#define _C COM3
#define _D COM4

#define _E COM3
#define _F COM1
#define _G COM2

#define SIG_REF 0 							// SIG0起始引脚
/***********************************/
#define SIG(uchar) uchar-SIG_REF 					// 引脚——LCD缓冲区映射
#define SIG_ADDR(uchar) (SIG(uchar))<<2 				// 引脚——HT1621数据地址映射

#define ENABLE_BIT(a) 	Write_1621(((a/4)-SIG_REF)<<2,(LcdBuffer[(a/4)-SIG_REF] |= ((1 << ((a%4)))<<4)))      // 显示单个码段
#define DISABLE_BIT(a) 	Write_1621(((a/4)-SIG_REF)<<2,(LcdBuffer[(a/4)-SIG_REF] &= ~((1<<((a%4)))<<4)))       // 清除单个码段
#define CPL_BIT(a) 	Write_1621(((a/4)-SIG_REF)<<2,(LcdBuffer[(a/4)-SIG_REF] ^= ((1<<((a%4)))<<4)))
#define _NULL 18

/// 蜂鸣器操作
#define ENABLE_BELL() SendCmd_1621(0x12)
#define DISABLE_BELL() SendCmd_1621(0x10)
#define CPL_BELL() SendCmd_1621((Bell^=2))

#define LED_P 16
#define LED_E 0x0e
#define LED_MINUS 17