240128.txt

1602液晶的驱动子程序

C51

# 程序如下
sbit bf0_fg = ACC^0;
sbit bf1_fg = ACC^1;
sbit bf3_fg = ACC^3;

sbit lcd_wr = P3^6;
sbit lcd_rd = P3^7;
sbit lcd_cd = P2^0;
unsigned char zimow[];
unsigned char zimoc[];
void lcd_read(void) /*液晶读函数*/
{
EA=0;
P0 = 0xff;
lcd_cd = 1;
lcd_wr = 1;
lcd_rd = 0;
ACC = P0;
lcd_rd = 1;
EA=1;
}

void lcd_bf01(void) /*液晶单字节读写判忙函数*/
{
do
lcd_read();
while (!(bf0_fg && bf1_fg));
}

void lcd_bf3(void) /*液晶连续读写判忙函数*/
{
do
lcd_read();
while (!bf3_fg);
}

void lcd_stric(uchar datax) /*液晶单字节写命
令函数*/
{
lcd_bf01();
EA=0;
lcd_cd = 1;
lcd_rd = 1;
lcd_wr = 0;
P0 = datax;
lcd_wr = 1;
EA=1;
}

void lcd_data(uchar datax) /*液晶单字节写数
据函数*/
{
EA=0;
lcd_cd = 0;
lcd_rd = 1;
lcd_wr = 0;
P0 = datax;
lcd_wr = 1;
EA=1;
}

void lcd_wt2(uchar data2,uchar comm) /*液晶双字节写函
数*/
{
lcd_bf01();
lcd_data(data2);
lcd_stric(comm);
}

void lcd_wt3(uchar data1,uchar data2,uchar comm) /*液
晶三字节写函数*/
{
lcd_bf01();
lcd_data(data1);
lcd_bf01();
lcd_data(data2);
lcd_stric(comm);
}

void lcd_clr(void) /*液晶清屏函数*/
{
uchar i,j=128;
lcd_wt3(0,0,0x24);
lcd_stric(0xb0);
do
{
i=30;
do
{
lcd_bf3();
lcd_data(0);
i--;
}
while (i);
j--;
}
while (j);
lcd_stric(0xb2);
}

void lcd_init(void) /*液晶初始化函数*/
{
lcd_wt3(0,0,0x40);
lcd_wt3(30,0,0x41);
lcd_wt3(0,0,0x42);
lcd_wt3(30,0,0x43);
lcd_stric(0xa4);
lcd_stric(0x80);
lcd_stric(0x9;
}

void lcd_word(uchar o_x,uchar o_y,uchar zm_code) /*在 （o_x,0_y) 位置显
示16*16点阵的汉字*/
{
uint xx,yy;
uchar i=16;
xx=o_y*30;
xx+=o_x;
yy=zm_code*0x20;
do
{
lcd_wt3(xx,xx/256,0x24);
lcd_wt2(zimow[yy],0xc0);
yy++;
lcd_wt2(zimow[yy],0xc0);
yy++;
xx+=30;
i--;
}
while (i);
}

void lcd_fwd(uchar o_x,uchar o_y,uchar zm_code)
{
uint xx,yy;
uchar i=16;
xx=o_y*30;
xx+=o_x;
yy=zm_code*0x20;
do
{
lcd_wt3(xx,xx/256,0x24);
lcd_wt2(~zimow[yy],0xc0);
yy++;
lcd_wt2(~zimow[yy],0xc0);
yy++;
xx+=30;
i--;
}
while (i);
}

void lcd_fbt(uchar o_x,uchar o_y,uchar zm_code)/*在 （o_x,0_y) 位置显示
8*16点阵的汉字*/

{
uint xx,yy;
uchar i=16;
xx=o_y*30;
xx+=o_x;
yy=zm_code*0x10;
do
{
lcd_wt3(xx,xx/256,0x24);
lcd_wt2(~zimoc[yy],0xc0);
yy++;
xx+=30;
i--;
}
while (i);
}

void lcd_byte(uchar o_x,uchar o_y,uchar zm_code)
{
uint xx,yy;
uchar i=16;
xx=o_y*30;
xx+=o_x;
yy=zm_code*0x10;
do
{
lcd_wt3(xx,xx/256,0x24);
lcd_wt2(zimoc[yy],0xc0);
yy++;
xx+=30;
i--;
}
while (i);
}

240128（21脚）引脚说明：

Pin NO. Symbol Description(Function) Remark
1 FG Module Frame Ground
2 VSS Ground
3 VDD Supply voltage for logic and LCE(+)
4 V0 Operating voltage for LCD variable
5 WR Data Write into T6963C
6 RD Chip enable Signal
7 CE Command/Data Selection
8 C/D Command/Data Selection
9 Reset Reset signal
10 DB0 Data bit 0
11 DB1 Data bit 1
12 DB2 Data bit 2
13 DB3 Data bit 3
14 DB4 Data bit 4
15 DB5 Data bit 5
16 DB6 Data bit 6
17 DB7 Data bit 7
18 FS Font Selection
19 VEE LCD 驱动负电压
20 LED(+) LED or EL Backlight
21 LED(-) LED or EL Backlight