本次任務(wù)用瑞賽單片機R7C004驅(qū)動定制的段式液晶，4COM，18seg，1/3偏壓。由于單片機本身有段式液晶驅(qū)動，根據(jù)數(shù)據(jù)手冊可以知道其工作過程及控制方法。

過程分2步：1，配置硬件驅(qū)動寄存器。2，根據(jù)具體液晶情況，取模，定義聯(lián)合結(jié)構(gòu)體。

步驟1可以查看數(shù)據(jù)手冊，根據(jù)步驟配置寫程序配置程序如下：4COM,18個seg從seg0到seg18（出去seg11）

void LCD_Init(void)

{

HB_LCDM1=0;nop();

HB_LCDM0=0x4D;

HB_PFSEG0=0xf0;HB_PFSEG1=0xF7;HB_PFSEG2=0x07;

HB_PFSEG3=0x00;HB_PFSEG4=0x00;HB_PFSEG5=0x00;

HB_PFSEG6=0x00;

HB_LCDC0=0x16;

HB_VLCD=0X16;

us_delay(100);

HB_LCDM1=0x20;

nop();nop();nop();

HB_LCDM1|=0xc0;

HB_ISCLCD=0;

}

步驟2 液晶的具體情況如下2圖

我們根據(jù)圖1來設(shè)定取模，我把 56 78 910 、、、、兩兩合為一個字節(jié) 8位數(shù)據(jù)。 即8H 7C 7B 7A 7D 7E 7G 7F 這里的7 即代表數(shù)碼管的位置，7代表從右往左數(shù)第2位數(shù)碼管。

這樣H 即為0x80 A為0x10 我用宏定義設(shè)置每一段的數(shù)值

#define      LcdSingMask 0x00

#define         LcdSeg_a 0x10

#define         LcdSeg_b 0x20

#define         LcdSeg_c 0x40

#define         LcdSeg_d 0x08

#define         LcdSeg_e 0x04

#define         LcdSeg_f 0x01

#define         LcdSeg_g 0x02

并通過宏定義對0-f 和u 取模

#define Char_0 LcdSeg_a+LcdSeg_b+LcdSeg_c\

+LcdSeg_d+LcdSeg_e+LcdSeg_f

#define         Char_1 LcdSeg_b+LcdSeg_c

#define Char_2 LcdSeg_a+LcdSeg_b\

+LcdSeg_d+LcdSeg_e+LcdSeg_g

#define Char_3 LcdSeg_a+LcdSeg_b+LcdSeg_c\

+LcdSeg_d+LcdSeg_g

#define Char_4 LcdSeg_b+LcdSeg_c\

+LcdSeg_f+LcdSeg_g

#define Char_5 LcdSeg_a+LcdSeg_c\

+LcdSeg_d+LcdSeg_f+LcdSeg_g

#define Char_6 LcdSeg_a+LcdSeg_g+LcdSeg_c\

+LcdSeg_d+LcdSeg_e+LcdSeg_f

#define Char_7 LcdSeg_a+LcdSeg_b+LcdSeg_c

#define Char_8 LcdSeg_a+LcdSeg_b+LcdSeg_c\

+LcdSeg_d+LcdSeg_e+LcdSeg_f+LcdSeg_g

#define Char_9 LcdSeg_a+LcdSeg_b+LcdSeg_c\

+LcdSeg_d+LcdSeg_f+LcdSeg_g

#define Char_A LcdSeg_a+LcdSeg_b+LcdSeg_c\

+LcdSeg_e+LcdSeg_f+LcdSeg_g

#define Char_b LcdSeg_c\

+LcdSeg_d+LcdSeg_e+LcdSeg_f+LcdSeg_g

#define Char_C LcdSeg_a+LcdSeg_f+LcdSeg_e+LcdSeg_d

#define Char_d LcdSeg_b+LcdSeg_c+LcdSeg_d\

                           +LcdSeg_e+LcdSeg_g

#define Char_E LcdSeg_a\

+LcdSeg_d+LcdSeg_e+LcdSeg_f+LcdSeg_g

#define Char_F LcdSeg_a+LcdSeg_f+LcdSeg_e+LcdSeg_g

#define Char_r          LcdSeg_e+LcdSeg_g

#define Char_H LcdSeg_b+LcdSeg_c+LcdSeg_e+LcdSeg_f+LcdSeg_g

#define Char_L     LcdSeg_d+LcdSeg_e+LcdSeg_f

#define Char_Row LcdSeg_g

#define Char_U LcdSeg_b+LcdSeg_c+LcdSeg_d+LcdSeg_e+LcdSeg_f

從圖一可以看到 基本上每兩個seg能完全配置一個數(shù)碼管，值得一提的是 ，我通過union來管理他們，簡潔明了。

typedef  union {  

uchar  LCD_LgcBuf[Gcst_LCDBufSize];

struct{

struct

{

unsigned char Sign_7F:1;

unsigned char Sign_7G:1;

unsigned char Sign_7E:1;

unsigned char Sign_7D:1;

unsigned char Sign_7A:1;

unsigned char Sign_7B:1;

unsigned char Sign_7C:1;

unsigned char Sign_8H:1;

}Sign_SEG1_2;

     struct

{

unsigned char Sign_8F:1;

unsigned char Sign_8G:1;

unsigned char Sign_8E:1;

unsigned char Sign_8D:1;

unsigned char Sign_8A:1;

unsigned char Sign_8B:1;

unsigned char Sign_8C:1;

unsigned char Sign_9H:1;

}Sign_SEG3_4;

   struct

{

unsigned char Sign_9F:1;

unsigned char Sign_9G:1;

unsigned char Sign_9E:1;

unsigned char Sign_9D:1;

unsigned char Sign_9A:1;

unsigned char Sign_9B:1;

unsigned char Sign_9C:1;

unsigned char Sign_kWh:1;

}Sign_SEG5_6;

struct

{

unsigned char Sign_Jiner:1;

unsigned char Sign_10H:1;

unsigned char Sign_Yuan:1;

unsigned char Sign_V:1;

unsigned char Sign_6A:1;

unsigned char Sign_6B:1;

unsigned char Sign_6C:1;

unsigned char Sign_7H:1;

}Sign_SEG7_8;

    struct

{

unsigned char Sign_6F:1;

unsigned char Sign_6G:1;

unsigned char Sign_6E:1;

unsigned char Sign_6D:1;

unsigned char Sign_Dian:1;

unsigned char Sign_11H:1;

unsigned char Sign_Shengyu:1;

unsigned char Sign_Dangqian:1;

}Sign_SEG9_10;

struct

{

unsigned char Sign_5A:1;

unsigned char Sign_5B:1;

unsigned char Sign_5C:1;

unsigned char Sign_6H:1;

unsigned char Sign_5F:1;

unsigned char Sign_5G:1;

unsigned char Sign_5E:1;

unsigned char Sign_5D:1;

}Sign_SEG11_12;

struct

{

unsigned char Sign_4A:1;

unsigned char Sign_4B:1;

unsigned char Sign_4C:1;

unsigned char Sign_5H:1;

unsigned char Sign_4F:1;

unsigned char Sign_4G:1;

unsigned char Sign_4E:1;

unsigned char Sign_4D:1;

}Sign_SEG13_14;

struct

{

unsigned char Sign_3A:1;

unsigned char Sign_3B:1;

unsigned char Sign_3C:1;

unsigned char Sign_4H:1;

unsigned char Sign_3F:1;

unsigned char Sign_3G:1;

unsigned char Sign_3E:1;

unsigned char Sign_3D:1;

}Sign_SEG15_16;

struct

{

unsigned char Sign_2A:1;

unsigned char Sign_2B:1;

unsigned char Sign_2C:1;

unsigned char Sign_A:1;

unsigned char Sign_2F:1;

unsigned char Sign_2G:1;

unsigned char Sign_2E:1;

unsigned char Sign_2D:1;

}Sign_SEG17_18;

}Signs;

}UnDef_LcdBuf;

這里初始化每個結(jié)構(gòu)體時，要把低為放前邊。

我把一些特殊的值單獨賦值，比如“當前”，“金額”。因為這些不是數(shù)碼，要根據(jù)特殊情況來置位。同樣用到宏定義。

#define         Sign_Kwh_Dat           GStr_LcdBuf.Signs.Sign_SEG5_6.Sign_kWh

#define         Sign_V_Dat         GStr_LcdBuf.Signs.Sign_SEG7_8.Sign_V

#define         Sign_Yuan_Dat         GStr_LcdBuf.Signs.Sign_SEG7_8.Sign_Yuan

#define         Sign_A_Dat           GStr_LcdBuf.Signs.Sign_SEG17_18.Sign_A

#define         Sign_Shengyu_Dat   GStr_LcdBuf.Signs.Sign_SEG9_10.Sign_Shengyu

#define         Sign_Jiner_Dat     GStr_LcdBuf.Signs.Sign_SEG7_8.Sign_Jiner

#define        Sign_Dianliang_Dat     GStr_LcdBuf.Signs.Sign_SEG9_10.Sign_Dian

#define        Sign_Dangqian_Dat GStr_LcdBuf.Signs.Sign_SEG9_10.Sign_Dangqian

#define         Sign_P4_Dat   GStr_LcdBuf.Signs.Sign_SEG15_16.Sign_4H

#define         Sign_P5_Dat   GStr_LcdBuf.Signs.Sign_SEG13_14.Sign_5H

#define         Sign_P6_Dat   GStr_LcdBuf.Signs.Sign_SEG11_12.Sign_6H

#define         Sign_P7_Dat   GStr_LcdBuf.Signs.Sign_SEG7_8.Sign_7H

#define         Sign_P8_Dat   GStr_LcdBuf.Signs.Sign_SEG1_2.Sign_8H

#define         Sign_P9_Dat   GStr_LcdBuf.Signs.Sign_SEG3_4.Sign_9H

#define         Sign_P10_Dat   GStr_LcdBuf.Signs.Sign_SEG7_8.Sign_10H

#define         Sign_P11_Dat   GStr_LcdBuf.Signs.Sign_SEG9_10.Sign_11H

#define         Dis_Kwh           Sign_Kwh_Dat=1

#define         Dis_Fu_V         Sign_V_Dat=1

#define         Dis_Yuan         Sign_Yuan_Dat=1

#define         Dis_An_A           Sign_A_Dat=1

#define         Dis_Shengyu   Sign_Shengyu_Dat=1 

#define         Dis_Jin_e     Sign_Jiner_Dat=1 

#define         Dis_Dianliang     Sign_Dianliang_Dat=1 

#define         Dis_Dangqian Sign_Dangqian_Dat=1

#define         Dis_Point5   Sign_P4_Dat=1

#define         Dis_Point4   Sign_P5_Dat=1

#define         Dis_Point3   Sign_P6_Dat=1

#define         Dis_Point2   Sign_P7_Dat=1

#define         Dis_Point1   Sign_P8_Dat=1

#define         Dis_Point0   Sign_P9_Dat=1

#define         Dis_Point10   Sign_P10_Dat=1

#define         Dis_Point11   Sign_P11_Dat=1

取模和液晶對應(yīng)起來后，就可以寫基礎(chǔ)的賦值程序了。

根據(jù)瑞薩R7004數(shù)據(jù)手冊介紹，只需王顯示寄存器賦值既可以了。

賦值程序如下：

void Screen_convert(void) 

{

*(LCD_StartAddr)=GStr_LcdBuf.LCD_LgcBuf[0]&0X0F;

*(LCD_StartAddr+1)=(GStr_LcdBuf.LCD_LgcBuf[0]>>4);

*(LCD_StartAddr+2)=GStr_LcdBuf.LCD_LgcBuf[1]&0X0F;

*(LCD_StartAddr+3)=(GStr_LcdBuf.LCD_LgcBuf[1]>>4);

*(LCD_StartAddr+4)=GStr_LcdBuf.LCD_LgcBuf[2]&0X0F;

*(LCD_StartAddr+5)=(GStr_LcdBuf.LCD_LgcBuf[2]>>4);

*(LCD_StartAddr+6)=GStr_LcdBuf.LCD_LgcBuf[3&0X0F];

*(LCD_StartAddr+7)=(GStr_LcdBuf.LCD_LgcBuf[3]>>4);

*(LCD_StartAddr+8)=GStr_LcdBuf.LCD_LgcBuf[4]&0X0F;

*(LCD_StartAddr+9)=(GStr_LcdBuf.LCD_LgcBuf[4]>>4);

*(LCD_StartAddr+10)=GStr_LcdBuf.LCD_LgcBuf[5]&0X0F;

*(LCD_StartAddr+12)=(GStr_LcdBuf.LCD_LgcBuf[5]>>4);

*(LCD_StartAddr+13)=GStr_LcdBuf.LCD_LgcBuf[6]&0X0F;

*(LCD_StartAddr+14)=(GStr_LcdBuf.LCD_LgcBuf[6]>>4);

*(LCD_StartAddr+15)=GStr_LcdBuf.LCD_LgcBuf[7]&0X0F;

*(LCD_StartAddr+16)=(GStr_LcdBuf.LCD_LgcBuf[7]>>4);

*(LCD_StartAddr+17)=GStr_LcdBuf.LCD_LgcBuf[8]&0X0F;

*(LCD_StartAddr+18)=(GStr_LcdBuf.LCD_LgcBuf[8]>>4);

}

LCD_StartAddr為寄存器首地址，數(shù)據(jù)手冊有。把一個字節(jié)分為高低4位，賦值給連續(xù)的兩個顯示寄存器，就可正常顯示一個數(shù)碼管的數(shù)字了。接下來介紹怎么王數(shù)組里填充數(shù)值。

void Dis_1char(uchar PuB_position,uchar PuB_data)
{
	uchar LuW_Dat;
	LuW_Dat=GAuB_char_tbl[PuB_data];
	switch(PuB_position)
		{
		case 0: GStr_LcdBuf.LCD_LgcBuf[2]=LuW_Dat;break;
		case 1: GStr_LcdBuf.LCD_LgcBuf[1]=LuW_Dat;break;
		case 2: GStr_LcdBuf.LCD_LgcBuf[0]=LuW_Dat;break;
		case 3: GStr_LcdBuf.LCD_LgcBuf[3]|=(LuW_Dat&0xf0);GStr_LcdBuf.LCD_LgcBuf[4]|=(LuW_Dat&0x0f);break;
		case 4: zhihuan(LuW_Dat);GStr_LcdBuf.LCD_LgcBuf[5]=LuW_Dat;break;
		case 5: zhihuan(LuW_Dat);GStr_LcdBuf.LCD_LgcBuf[6]=LuW_Dat;break;
		case 6: zhihuan(LuW_Dat);GStr_LcdBuf.LCD_LgcBuf[7]=LuW_Dat;break;
		case 7: zhihuan(LuW_Dat);GStr_LcdBuf.LCD_LgcBuf[8]=LuW_Dat;break;
		default: break;
		}
 
}
這里要注意GStr_LcdBuf.LCD_LgcBuf[？]的順序和要顯示的位置的關(guān)系，和圖一一一對應(yīng)，比如要顯示0位置時，可根據(jù)圖1的 要用9A-9C，K那兩個seg 即GStr_LcdBuf.LCD_LgcBuf[2]。位置3，有點特殊，他分別用到了數(shù)組3的高4位，和數(shù)組4的低四位。位置4-7，高低四位又反過來，所以要加zhihuan(LuW_Dat);實現(xiàn)高低4為互換。
#define zhihuan(dat)  ((dat>>4)|(dat<<4))

了解基本的顯示程序后，顯示的步驟為：

1，LCD_Init()

2，Dis_1char(PuB_position,PuB_data)，，還可以有Sign_Kwh_Dat、Dis_Jin_e、Dis_Point0之類。

3，Screen_convert()