STM32点亮开源LCD (amobbs.com 阿莫电子技术论坛) -

richey07 发表于 2009-10-14 22:24:43

STM32点亮开源LCD

将白沙兄的代码移植到STM32平台。
我用的是红牛开发板，STM32VEt6
STM32太快了，必须延时才能点亮，刚开始是降频到32MHz时可以点亮，后来在72MHz下通过延时方式实现。
下面是我修改的lcd_code.h
照片拍的不好，A95不知道怎么才能拍微距。

有个问题：显示同样数据，开源LCD的刷新速度大约比我的TFT屏要慢1秒钟左右，不知道是什么原因？
找到问题了，不是刷新速率的问题
是我的数值转换精度出了点问题造成的
http://cache.amobbs.com/bbs_upload782111/files_20/ourdev_491703.jpg
(原文件名:照片.jpg)

//这里是符号对应的显示顺序，也就对应了在HT1621B数据寄存器内的位置
#define _lcd_BUSY    0
#define _lcd_AC 1
#define _lcd_PLUS 2
#define _lcd_F1 3
#define _lcd_ERROR 4
#define _lcd_DC 5
#define _lcd_MINUS 6
#define _lcd_F2 7
#define _lcd_DOT0 12
#define _lcd_AUTO 20
#define _lcd_RUN 24
#define _lcd_PAUSE 25
#define _lcd_DOT1 26
#define _lcd_COLON0 27
#define _lcd_DOT2 32
#define _lcd_STOP 40
#define _lcd_KPA 44
#define _lcd_SETUP 45
#define _lcd_DOT3 46
#define _lcd_COLON1 47
#define _lcd_DOT4 52
#define _lcd_KG 60
#define _lcd_MM 64
#define _lcd_KM 65
#define _lcd_L 66
#define _lcd_M3 67
#define _lcd_DB 68
#define _lcd_PERCENT 69
#define _lcd_OHOM 70
#define _lcd_DEGREE 71
#define _lcd_A 72
#define _lcd_V 73
#define _lcd_MHZ 74
#define _lcd_KW 75
#define _lcd_MA 76
#define _lcd_MV 77
#define _lcd_KHZ 78
#define _lcd_W 79
#define _lcd_NG 80
#define _lcd_OK 81
#define _lcd_RX 82
#define _lcd_TX 83
#define _lcd_FM 84
#define _lcd_PM 85
#define _lcd_AM 86
#define _lcd_CARD 87
#define _lcd_AT3 88
#define _lcd_AT2 89
#define _lcd_AT1 90
#define _lcd_AT0 91
#define _lcd_LOCK 95
#define _lcd_BELL 103
#define _lcd_COLON2 111
#define _lcd_BAT 119
#define _lcd_MAX 124
#define _lcd_MIN 125
#define _lcd_CH 126
#define _lcd_FAULT 127

/*这里是我的测试板的IO口定义，用户可以根据需要修改
p2.2 = data;
p4.0 = cs;
p4.1 = rd
p4.2 = wr
*/

__asm void wait()
{
nop
nop
nop
nop
nop
nop
BX lr
}
#define DELAY_COUNTS 0
//下面是根据我的测试板情况定义的，用户可以需要修改
#define CS_LOW {GPIO_ResetBits(GPIOD, GPIO_Pin_8) ;wait();}
#define CS_HIGH {GPIO_SetBits(GPIOD, GPIO_Pin_8) ;wait();}
#define RD_LOW {GPIO_ResetBits(GPIOD, GPIO_Pin_9) ;wait();}
#define RD_HIGH {GPIO_SetBits(GPIOD, GPIO_Pin_9) ;wait();}
#define WR_LOW {GPIO_ResetBits(GPIOD, GPIO_Pin_10);wait();}
#define WR_HIGH {GPIO_SetBits(GPIOD, GPIO_Pin_10);wait();}

#define DATA_LOW{GPIO_ResetBits(GPIOD, GPIO_Pin_11) ;wait();}
#define DATA_HIGH {GPIO_SetBits(GPIOD, GPIO_Pin_11) ;wait(); }

static void delay(int iCounts);
//下面是驱动程序定义的一个显示缓冲区，共16个字节，128位
unsigned int lcd_buffer={0,0,0,0,0,0,0,0};

//这个函数可以向HT1621B写入一个命令；用户可能需要在语句间增加必要的延时
void send_lcd_command(unsigned char command)
{
unsigned short int i;
CS_LOW
WR_LOW    //PRESENT 100 COMMAND CODE
DATA_HIGH
WR_HIGH

WR_LOW
DATA_LOW
WR_HIGH

WR_LOW
WR_HIGH

for (i =0;i<=7;i++)
{
   WR_LOW
   if ((command & 0x80) !=0)
      DATA_HIGH
   else
      DATA_LOW
   WR_HIGH
   command = command << 1;
}

WR_LOW
WR_HIGH

CS_HIGH
}

//这个函数可以向HT1621B写入一个数据；用户可能需要在语句间增加必要的延时
void send_lcd_data(unsigned short int address,unsigned short int data)
{
unsigned short int i;
CS_LOW

WR_LOW    //PRESENT 101 DATA CODE
DATA_HIGH
WR_HIGH

WR_LOW
DATA_LOW
WR_HIGH

WR_LOW
DATA_HIGH
WR_HIGH

address = address << 2;
for ( i =0;i<=5;i++)
{
   WR_LOW
   if ((address & 0x80) !=0)
      DATA_HIGH
   else
   DATA_LOW
   WR_HIGH
   address = address << 1;
}

for (i =0;i<=3;i++)
{
   WR_LOW
   if ((data & 0x01) !=0) DATA_HIGH
   else DATA_LOW
   WR_HIGH
   data = data >> 1;
}

CS_HIGH
}
//这个函数可以将显示缓冲区刷新到HT1621B；用户可能需要在语句间增加必要的延时
void flood_lcd_data(void)
{
unsigned int temp_data;
unsigned short int i,j;
CS_LOW

WR_LOW    //PRESENT 101 DATA CODE
DATA_HIGH
WR_HIGH

WR_LOW
DATA_LOW
WR_HIGH

WR_LOW
DATA_HIGH
WR_HIGH

for (i =0;i<=5;i++)
{
   WR_LOW
   DATA_LOW
   WR_HIGH
}

for (i =0;i<=7;i++)
{
   temp_data = lcd_buffer;
   for (j=0;j<=15;j++)
   {
   WR_LOW
   if ((temp_data & 0x01) !=0) DATA_HIGH
   else DATA_LOW
   WR_HIGH
   temp_data = temp_data >> 1;
   }
}

CS_HIGH
}

//初始化HT1621B
void lcd_init(void)
{
int i;
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11 | GPIO_Pin_12;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);

send_lcd_command(0x28); //1/2bias，4comm
//for(i=0;i<=1000;i++);
send_lcd_command(0x03); //启动内部振荡器
//for(i=0;i<=1000;i++);
send_lcd_command(0x01); //打开显示

// RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
}

//向液晶写一个符号
//name：可直接写0~127的整数，也可以写程序开始定义的标号，如：_lcd_BUSY
//display：符号
void lcd_char(unsigned short int name,unsigned short int display)
{
unsigned short int i,j;
i= name/16;
j= name%16;
if (display == 1) lcd_buffer |= 1<<j;
else lcd_buffer &= ~(1<<j);
flood_lcd_data();

}

//清除全部液晶的显示，同时清空显示缓冲区
void lcd_clr()
{
int i;
for (i=0; i<=7;i++) lcd_buffer=0;
flood_lcd_data();

}

//向液晶的数位处写一个0~9的数
//数位为大数码的左至右为0~5，小数码的右至左为6~9；
//number：想显示的数 0~9
//position：显示的数位
//display：显示开关，0 关闭该数位显示（此时number值无效），1 显示该数位数字
void lcd_number(unsigned short int number,unsigned short int position,unsigned short int display )
{
switch (position)
{
case 0:
{
if (display == 0) lcd_buffer &= 0x10ff;
else
{
   lcd_buffer &= 0x10ff;
   switch (number)
{
case 0:lcd_buffer |= 0xEB00;
   break;
case 1:lcd_buffer |= 0x6000;
   break;
case 2:lcd_buffer |= 0xC700;
   break;
case 3:lcd_buffer |= 0xE500;
   break;
case 4:lcd_buffer |= 0x6C00;
   break;
case 5:lcd_buffer |= 0xAD00;
   break;
case 6:lcd_buffer |= 0xAF00;
   break;
case 7:lcd_buffer |= 0xE000;
   break;
case 8:lcd_buffer |= 0xEF00;
   break;
case 9:lcd_buffer |= 0xED00;
   break;
}}
break;
}
case 1:
{
if (display == 0) lcd_buffer &= 0xff10;
else
{
   lcd_buffer &= 0xff10;
   switch (number)
{
case 0:lcd_buffer |= 0x00EB;
   break;
case 1:lcd_buffer |= 0x0060;
   break;
case 2:lcd_buffer |= 0x00C7;
   break;
case 3:lcd_buffer |= 0x00E5;
   break;
case 4:lcd_buffer |= 0x006C;
   break;
case 5:lcd_buffer |= 0x00AD;
   break;
case 6:lcd_buffer |= 0x00AF;
   break;
case 7:lcd_buffer |= 0x00E0;
   break;
case 8:lcd_buffer |= 0x00EF;
   break;
case 9:lcd_buffer |= 0x00ED;
   break;
}}
break;
}
case 2:
lcd_buffer &= 0x0fff;
lcd_buffer &= 0xfff1;

if (display == 0) break;

else switch (number)
{
case 0:
   lcd_buffer |= 0xB000;
   lcd_buffer |= 0x000E;
   break;
case 1:
   lcd_buffer |= 0x0006;
   break;
case 2:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000C;
   break;
case 3:
   lcd_buffer |= 0x5000;
   lcd_buffer |= 0x000E;
   break;
case 4:
   lcd_buffer |= 0xC000;
   lcd_buffer |= 0x0006;
   break;
case 5:
   lcd_buffer |= 0xD000;
   lcd_buffer |= 0x000A;
   break;
case 6:
   lcd_buffer |= 0xF000;
   lcd_buffer |= 0x000A;
   break;
case 7:
   lcd_buffer |= 0x0000;
   lcd_buffer |= 0x000E;
   break;
case 8:
   lcd_buffer |= 0xF000;
   lcd_buffer |= 0x000E;
   break;
case 9:
   lcd_buffer |= 0xD000;
   lcd_buffer |= 0x000E;
   break;
}
break;
case 3:
lcd_buffer &= 0xF10F;
if (display == 0) break;
elseswitch (number)
{
case 0:lcd_buffer |= 0x0EB0;
   break;
case 1:lcd_buffer |= 0x0600;
   break;
case 2:lcd_buffer |= 0x0C70;
   break;
case 3:lcd_buffer |= 0x0E50;
   break;
case 4:lcd_buffer |= 0x06C0;
   break;
case 5:lcd_buffer |= 0x0AD0;
   break;
case 6:lcd_buffer |= 0x0AF0;
   break;
case 7:lcd_buffer |= 0x0E00;
   break;
case 8:lcd_buffer |= 0x0EF0;
   break;
case 9:lcd_buffer |= 0x0ED0;
   break;
}
break;
case 4:
lcd_buffer &= 0xFF10;
if (display == 0) break;
elseswitch (number)
{
case 0:lcd_buffer |= 0x00EB;
   break;
case 1:lcd_buffer |= 0x0060;
   break;
case 2:lcd_buffer |= 0x00C7;
   break;
case 3:lcd_buffer |= 0x00E5;
   break;
case 4:lcd_buffer |= 0x006C;
   break;
case 5:lcd_buffer |= 0x00AD;
   break;
case 6:lcd_buffer |= 0x00AF;
   break;
case 7:lcd_buffer |= 0x00E0;
   break;
case 8:lcd_buffer |= 0x00EF;
   break;
case 9:lcd_buffer |= 0x00ED;
   break;
}
break;
case 5:
lcd_buffer &= 0x10FF;
if (display == 0) break;
elseswitch (number)
{
case 0:lcd_buffer |= 0xEB00;
   break;
case 1:lcd_buffer |= 0x6000;
   break;
case 2:lcd_buffer |= 0xC700;
   break;
case 3:lcd_buffer |= 0xE500;
   break;
case 4:lcd_buffer |= 0x6C00;
   break;
case 5:lcd_buffer |= 0xAD00;
   break;
case 6:lcd_buffer |= 0xAF00;
   break;
case 7:lcd_buffer |= 0xE000;
   break;
case 8:lcd_buffer |= 0xEF00;
   break;
case 9:lcd_buffer |= 0xED00;
   break;
}
break;
case 6:
lcd_buffer &= 0x8fff;
lcd_buffer &= 0xfff0;

if (display == 0) break;

else switch (number)
{
case 0:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000D;
   break;
case 1:
   lcd_buffer |= 0x6000;
   break;
case 2:
   lcd_buffer |= 0x3000;
   lcd_buffer |= 0x000E;
   break;
case 3:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000A;
   break;
case 4:
   lcd_buffer |= 0x6000;
   lcd_buffer |= 0x0003;
   break;
case 5:
   lcd_buffer |= 0x5000;
   lcd_buffer |= 0x000B;
   break;
case 6:
   lcd_buffer |= 0x5000;
   lcd_buffer |= 0x000F;
   break;
case 7:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x0000;
   break;
case 8:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000F;
   break;
case 9:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000B;
   break;
}
break;
case 7:
lcd_buffer &= 0xF08F;
if (display == 0) break;
elseswitch (number)
{
case 0:lcd_buffer |= 0x0D70;
   break;
case 1:lcd_buffer |= 0x0060;
   break;
case 2:lcd_buffer |= 0x0E30;
   break;
case 3:lcd_buffer |= 0x0A70;
   break;
case 4:lcd_buffer |= 0x0360;
   break;
case 5:lcd_buffer |= 0x0B50;
   break;
case 6:lcd_buffer |= 0x0F50;
   break;
case 7:lcd_buffer |= 0x0070;
   break;
case 8:lcd_buffer |= 0x0F70;
   break;
case 9:lcd_buffer |= 0x0B70;
   break;
}
break;
case 8:
lcd_buffer &= 0x8fff;
lcd_buffer &= 0xfff0;

if (display == 0) break;

else switch (number)
{
case 0:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000D;
   break;
case 1:
   lcd_buffer |= 0x6000;
   break;
case 2:
   lcd_buffer |= 0x3000;
   lcd_buffer |= 0x000E;
   break;
case 3:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000A;
   break;
case 4:
   lcd_buffer |= 0x6000;
   lcd_buffer |= 0x0003;
   break;
case 5:
   lcd_buffer |= 0x5000;
   lcd_buffer |= 0x000B;
   break;
case 6:
   lcd_buffer |= 0x5000;
   lcd_buffer |= 0x000F;
   break;
case 7:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x0000;
   break;
case 8:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000F;
   break;
case 9:
   lcd_buffer |= 0x7000;
   lcd_buffer |= 0x000B;
   break;
}
break;
case 9:
lcd_buffer &= 0xF08F;
if (display == 0) break;
elseswitch (number)
{
case 0:lcd_buffer |= 0x0D70;
   break;
case 1:lcd_buffer |= 0x0060;
   break;
case 2:lcd_buffer |= 0x0E30;
   break;
case 3:lcd_buffer |= 0x0A70;
   break;
case 4:lcd_buffer |= 0x0360;
   break;
case 5:lcd_buffer |= 0x0B50;
   break;
case 6:lcd_buffer |= 0x0F50;
   break;
case 7:lcd_buffer |= 0x0070;
   break;
case 8:lcd_buffer |= 0x0F70;
   break;
case 9:lcd_buffer |= 0x0B70;
   break;
}
break;
}
flood_lcd_data();
}

static void delay(int iCounts)
{
int i;
for(i=0;i<iCounts;i++)
   ;
}

abuzhu 发表于 2009-10-14 22:35:50

关于速度慢%……很可能是因为我随便写的这些代码的效率非常低，这个可以参考段式液晶分论坛里的大姨妈（代码）瘦身贴。

richey07 发表于 2009-10-14 22:45:41

恩，我怀疑是LCD的驱动IC刷新频率低。

abuzhu 发表于 2009-10-14 23:03:37

在这片LCD上数据是串行方式送进IC的，肯定比并行要慢。但说到刷新频率可能不会低到人眼可以分辨的程度，这是另一个概念。

richey07 发表于 2009-10-14 23:14:08

恩，我只是谨慎怀疑驱动IC从显存中取数据刷新LCD的频率不够

mystm32 发表于 2009-10-14 23:35:00

不错的东西

richey07 发表于 2009-10-15 00:06:10

找到问题了，不是刷新速率的问题
是我的数值转换精度出了点问题造成的

castle911 发表于 2010-3-5 10:08:17

新手mark

trucy 发表于 2010-3-10 10:50:14

新手mark

shgdd520com 发表于 2011-9-21 16:57:05

楼主，你的这个用的STM32 是不带LCD驱动的片子吗？STM32 --> HT1621B-->段式LCD ，吗？我找了个STM32L152 好像直接带LCD驱动， LCD没有驱动起来啊？

chaojikoushuige 发表于 2016-4-12 20:37:46

楼主这是做的供热产品吗？

chaojikoushuige 发表于 2016-4-12 20:39:44

我们也在研究地下供热监控的，能开源下不？？？

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STM32点亮开源LCD