段式LCD液晶显示屏的玩法
本次任务用华大单片机HC32L136驱动定制的段式液晶,4COM,34seg,1/3偏压。由于单片机本身有段式液晶驱动,根据数据手册可以知道其工作过程及控制方法。
过程分2步:1,配置硬件驱动寄存器。2,根据具体液晶情况,取模,定义联合结构体。
步骤1可以查看数据手册,根据步骤配置写程序配置程序如下:4COM,34个seg从seg0到seg34
步骤2 液晶的具体情况如下2图
#define LcdSingMask 0x00 #define LcdSeg_a 0x80 #define LcdSeg_b 0x40 #define LcdSeg_c 0x20 #define LcdSeg_d 0x10 #define LcdSeg_e 0x02 #define LcdSeg_f 0x04 #define LcdSeg_g 0x08
并通过宏定义对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_H LcdSeg_b+LcdSeg_c+LcdSeg_e+LcdSeg_f+LcdSeg_g #define Char_L LcdSeg_d+LcdSeg_e+LcdSeg_f
从图一可以看到 基本上每两个seg能完全配置一个数码管,值得一提的是 ,我通过union来管理他们,简洁明了
typedef union { uchar LCD_LgcBuf[Gcst_LCDBufSize]; struct{ struct { unsigned char Sign_1BC:1; unsigned char Sign_2E:1; unsigned char Sign_2G:1; unsigned char Sign_2F:1; unsigned char Sign_2D:1; unsigned char Sign_2C:1; unsigned char Sign_2B:1; unsigned char Sign_2A:1; }Sign_SEG5_6; struct { unsigned char Sign_3H:1; unsigned char Sign_3E:1; unsigned char Sign_3G:1; unsigned char Sign_3F:1; unsigned char Sign_3D:1; unsigned char Sign_3C:1; unsigned char Sign_3B:1; unsigned char Sign_3A:1; }Sign_SEG7_8; struct { unsigned char Sign_P1:1; unsigned char Sign_5E:1; unsigned char Sign_5G:1; unsigned char Sign_5F:1; unsigned char Sign_5D:1; unsigned char Sign_5C:1; unsigned char Sign_5B:1; unsigned char Sign_5A:1; }Sign_SEG9_10; struct { unsigned char Sign_6BC:1; unsigned char Sign_7E:1; unsigned char Sign_7G:1; unsigned char Sign_7F:1; unsigned char Sign_7D:1; unsigned char Sign_7C:1; unsigned char Sign_7B:1; unsigned char Sign_7A:1; }Sign_SEG12_13; struct { unsigned char Sign_8H:1; unsigned char Sign_8E:1; unsigned char Sign_8G:1; unsigned char Sign_8F:1; unsigned char Sign_8D:1; unsigned char Sign_8C:1; unsigned char Sign_8B:1; unsigned char Sign_8F:1; }Sign_SEG14_15; struct { unsigned char Sign_P2:1; unsigned char Sign_10E:1; unsigned char Sign_10G:1; unsigned char Sign_10F:1; unsigned char Sign_10D:1; unsigned char Sign_10C:1; unsigned char Sign_10B:1; unsigned char Sign_10A:1; }Sign_SEG18_19; struct { unsigned char Sign_11BC:1; unsigned char Sign_12E:1; unsigned char Sign_12G:1; unsigned char Sign_12F:1; unsigned char Sign_12D:1; unsigned char Sign_12C:1; unsigned char Sign_12B:1; unsigned char Sign_12A:1; }Sign_SEG19_20; struct { unsigned char Sign_MIN:1; unsigned char Sign_13E:1; unsigned char Sign_13G:1; unsigned char Sign_13F:1; unsigned char Sign_13D:1; unsigned char Sign_13C:1; unsigned char Sign_13B:1; unsigned char Sign_13A:1; }Sign_SEG21_22; struct { unsigned char Sign_P3:1; unsigned char Sign_15E:1; unsigned char Sign_15G:1; unsigned char Sign_15F:1; unsigned char Sign_15D:1; unsigned char Sign_15C:1; unsigned char Sign_15B:1; unsigned char Sign_15A:1; }Sign_SEG24_25; 。。。。。。。。等等 }Signs; }UnDef_LcdBuf;
这里初始化每个结构体时,要把低为放前边
我把一些特殊的值单独赋值,比如“当前”,“金额”。因为这些不是数码,要根据特殊情况来置位。同样用到宏定义。
#define Sign_1_Dat GStr_LcdBuf.Signs.Sign_SEG5_6.Sign_1BC #define Sign_P1_Dat GStr_LcdBuf.Signs.Sign_SEG9_10.Sign_P1 #define Sign_2_Dat GStr_LcdBuf.Signs.Sign_SEG12_13.Sign_6BC #define Sign_P2_Dat GStr_LcdBuf.Signs.Sign_SEG18_19.Sign_P2 。。。。。。
#define Dis_Point1 Sign_1_Dat=1 #define Dis_Point2 Sign_P1_Dat=1 #define Dis_Point3 Sign_2_Dat=1 #define Dis_Point4 Sign_P2_Dat=1
取模和液晶对应起来后,就可以写基础的赋值程序了。
赋值程序如下:
#define PTEMP_RAM0 (volatile uint32_t*)&M0P_LCD->RAM0
#define PTEMP_RAM1 (volatile uint32_t*)&M0P_LCD->RAM1
#define PTEMP_RAM2 (volatile uint32_t*)&M0P_LCD->RAM2
#define PTEMP_RAM3 (volatile uint32_t*)&M0P_LCD->RAM3
#define PTEMP_RAM4 (volatile uint32_t*)&M0P_LCD->RAM4
#define PTEMP_RAM5 (volatile uint32_t*)&M0P_LCD->RAM5
#define PTEMP_RAM6 (volatile uint32_t*)&M0P_LCD->RAM6
#define PTEMP_RAM7 (volatile uint32_t*)&M0P_LCD->RAM7
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为寄存器首地址,数据手册有。把一个字节分为高低4位,赋值给连续的两个显示寄存器,就可正常显示一个数码管的数字了。接下来介绍怎么王数组里填充数值。
<pre name="code" class="objc">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; } }
这里要注意GStr_LcdBuf.LCD_LgcBuf[?]的顺序和要显示的位置的关系,和图一一一对应,比如要显示0位置时,可根据图1的 要用9A-9C,K那两个seg 即GStr_LcdBuf.LCD_LgcBuf[2]。位置3,有点特殊,他分别用到了数组3的高4位,和数组4的低四位。位置4-7,高低四位又反过来,所以要加zhihuan(LuW_Dat);实现高低4为互换。
#define zhihuan(dat) ((dat>>4)|(dat<<4))
了解基本的显示程序后,显示的步骤为:
1,LCD_Init()
2,Dis_1char(PuB_position,PuB_data),,还可以有Sign_Kwh_Dat、Dis_Jin_e、Dis_Point0之类。
3,Screen_convert()