快速了解12864點陣液晶屏的使用方法（詳細）

ID:705815 · 發(fā)表于 2020-9-23 09:35

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T12864C002是TRUSTYLCD.COM旗下目前使用率最高的一款COG結(jié)構(gòu)的12864點陣液晶屏，其特點是質(zhì)量可靠，功耗低，訂貨方便不停產(chǎn)，尺寸適中，可應(yīng)用到多種行業(yè)設(shè)備上。現(xiàn)在就詳細介紹這款產(chǎn)品的使用方法，讓你能在最短的時間內(nèi)搞定LCD液晶顯屏能正常顯示出文字和圖片。（產(chǎn)品規(guī)格書及。

點陣數(shù)量: 128(w)*64(h)

顯示模式: FSTN正顯(白底黑字), 或STN正顯（黃綠底黑字），或STN負顯（藍底白字）。

背光模式: LED白色(或其他色)，背光結(jié)構(gòu)有支架背光或平面背光（配套鐵框使用）。

控制芯片：ST7565R。

通訊接口：FPC-36PIN焊接，可SPI串口或8位并口通訊。

工作電壓：3.3V

工作溫度: -20℃~70℃

外形尺寸: 69.0mm*46.0mm*2.8mm（不含背光時的尺寸）

視域尺寸: 65.5mm*38.0mm

單點大小: 0.45mm*0.49mm

Pin No.	Pin Name	Function
1、2、24、31、34、36	NC	空腳
3	/CS1	Chip selection input 片選
4	/RES	Rester 復(fù)位
5	A0	Data/Command control 選擇指令或數(shù)據(jù)
6	/WR	Write (/WR ) control signal input. 寫
7	/RD	Read (/RD ) control signal input. 讀
8~15	DB0-DB7	8bit Date bus 數(shù)據(jù)
16	VDD	Power supply voltage (Positive) 電源3~3.3V
17	VSS	Negative power supply,0V 地
18	VOUT	positive voltage supply pin of the chip. 升壓輸出，對地接電容
19~23	C3+,C1-,C1+,C2+,C2-	When internal DC-DC voltage converter is used, external capacitor is connected between these pins. 升壓電路接電容
25~29	V1,V2,V3,V4,V0	LCD driving voltages. 分壓電路
30	VR	Output voltage regulator terminal. 外部調(diào)對比度接電阻位
32	C86	MPU interface selection pin 選擇8080或6800時序
33	P/S	Parallel data input/serial data input switch terminal 選擇并口或串口
35	IRS	This terminal selects the resistors for the V0 voltage level adjustment. 選擇內(nèi)部調(diào)對比度或外部調(diào)比比度

接口定義說明：

了解了顯示屏的基本參數(shù)及接口定義后，

首先設(shè)計硬件電路，這款LCD的硬件部份比較簡單，按上圖設(shè)計好PCB電路圖，外圍只需外加9顆無極性的1Uf/16V電容即可，這里注意一定要用無極性的，以免方向搞錯造成損壞，耐壓在16V以上（因為液晶內(nèi)部升壓后會到達13.5V左右，所以最低要耐壓16V的才行），液晶屏的VDD供電電壓是3.3V，在2.7V~3.3V之間的電壓都可以（電壓不同可能對比度需要軟件調(diào)節(jié)一下），如果必需要用5V供電，那VDD可以接一個AMS1117-3.3降壓三極管(5V降到3.3V)，這僅僅是VDD降壓到了3.3V，其他信號線還是5V也是不行的，這里有兩種方法可以選用，最簡單的是信號線上串一個1K的電阻，這樣可以降低一點電壓，不過這種信號線電流很小，串了電阻也就對IC起到了一定的保護作用，另一種就是用降壓芯片降壓到3.3V，這種成本較高一點，但是可靠性也更強。接下來就要確定好是選用8位并口通訊還是SPI串口通訊了，不管用哪一種接口，對于128*64點陣來講，顯示的速度要感受上不是很明顯，除非要求很高的產(chǎn)品，一般產(chǎn)品均可以選用SPI串口，這樣可以選用IO口較少的單片機，可以減少整體成本。在使用SPI串口時，其他不需要用到的PIN腳統(tǒng)一接到GND上，這樣顯示會更穩(wěn)定。

如果覺得自己設(shè)計PCB太麻煩，也可以向LCD廠家要求提供帶PCB板的液晶模組，這樣開發(fā)樣機會更節(jié)省時間，質(zhì)量也可靠。

硬件做好后，那就寫程序調(diào)試顯示了，下面以51單片機為基礎(chǔ)介紹一下編寫顯示程序：

指令表：

No.	Instrctions	Code											Function
No.	Instrctions	A0	/RD	/WR	D7	D6	D5	D4	D3	D2	D1	D0	Function
1	Display ON/OFF	0	1	0	1	0	1	0	1	1	1	DON	DON=0,display off DON=1,display on
2	Display start line set	0	1	0	0	1	Display start address						Set the display RAM display start line address
3	Set Page Address	0	1	0	1	0	1	1	Page address				Set the display RAM Page address
4	Ser Column Address (Upper-4 bits)	0	1	0	0	0	0	1	Col. Add				Set the upper-4-bit of column address counter
4	Ser Column Address (Lower-4 bits)	0	1	0	0	0	0	0	Col. Add				Set the low-4-bit of column address counter
5	Read Staus	0	0	1	Status				0	0	0	0	Read the status data
6	Write Display Data	1	1	0	Write Data								Write data into the display RAM
7	Read Display Data	1	0	1	Read Data								Read data from the display RAM
8	ADC Select	0	1	0	1	0	1	0	0	0	0	ADC	Set the display RAM address SEG output Correspondence ADC = 0,Normal. ADC = 1,Reverse
9	Normal/Reverse Display	0	1	0	1	0	1	0	0	1	1	REV	REV = 0, Normal REV = 1, Reverse
10	Entire Display ON/OFF	0	1	0	1	0	1	0	0	1	0	EON	EON = 0, Normal EON = 1, Entire display ON
11	Set LCD Bias	0	1	0	1	0	1	0	0	0	1	BIAS	Bias = 0, 1/9 Bias Bias = 1, 1/7 Bias
12	Set Read-Modify-Write	0	1	0	1	1	1	0	0	0	0	0	Enter the “Read-Modify-Write” mode
13	Reset Read-Modify-Write	0	1	0	1	1	1	0	1	1	1	0	Clear the “Read-Modify-Write” mode
14	Reset	0	1	0	1	1	1	0	0	0	1	0	Resets the LCD module
15	SHL S elect	0	1	0	1	1	0	0	SHL	*	*	*	Set the COM scanning direction SHL = 0, Normal SHL = 1, Flipped in y-direction * = don’t care terms
16	Power Control Set	0	1	0	0	0	1	0	1	VC	VR	VF	Set the power circuit operation mode VF : LCD Supply Voltage Follower VR : LCD Supply Voltage Regulator VF : LCD Supply Voltage Converter (1 = ON, 0 = OFF)
17	Regulator Resistor Select	0	1	0	0	0	1	0	0	Ratio			Set the built-in resistor ratio (Rb/Ra)
18	Electronic volume mode set	0	1	0	1	0	0	0	0	0	0	1	Set reference voltage mode
18	Electronic volume register set	0	1	0	*	*	Electronic Control value						Set reference voltage register
19	Power Save		-	-	-	-	-	-	-	-	-	-	Compound instruction Display OFF + Entire Display ON
20	NOP	0	1	0	1	1	1	0	0	0	1	1	Non-operation command

file:///C:/Users/admin/AppData/Local/Temp/msohtmlclip1/01/clip_image006.jpg

file:///C:/Users/admin/AppData/Local/Temp/msohtmlclip1/01/clip_image008.jpg

file:///C:/Users/admin/AppData/Local/Temp/msohtmlclip1/01/clip_image010.jpg實測顯示效果

下面是具體顯示程序（SPI串口，實測可正顯示顯示）

#include <reg51.h>
#include <intrins.h>
#include <absacc.h>
#define uchar unsigned char
#define uint unsigned int
sbit R_S= P3^5;//指令/數(shù)據(jù)選擇信號
sbit RES= P3^4;//復(fù)位信號
sbit SCK=P1^6;
sbit SDA=P1^7;
sbit CS1=P3^7;//片選
bit Flage1=0;
void LcdInit();
void Clear();
void Delayms(uint ms);
void Comwrite(uchar cmd);
void Datwrite(uchar dat);
void Setadd(uchar xl,uchar yl);
void disp_str(unsigned char *p,unsignedchar uCol,uPage);
unsigned char CurOffset;
#define ASC_CHR_WIDTH 8
#define ASC_CHR_HEIGHT 12
typedef struct typFNT_ASC16
{
char Index[1];
char Msk[16];
};
code struct typFNT_ASC16 ASC_16[] =
{
"1",0x00,0x00,0x08,0x08,0xFC,0x00,0x00,0x00,0x00,0x00,0x04,0x04,0x07,0x04,0x04,0x00,
"2",0x00,0x00,0x08,0x04,0x84,0x44,0x38,0x00,0x00,0x00,0x06,0x05,0x04,0x04,0x04,0x00,
"3",0x00,0x00,0x08,0x04,0x44,0x44,0xB8,0x00,0x00,0x00,0x02,0x04,0x04,0x04,0x03,0x00,
"4",0x00,0x00,0x80,0x60,0x18,0xFC,0x00,0x00,0x00,0x00,0x01,0x01,0x05,0x07,0x05,0x00,
"5",0x00,0x00,0x7C,0x44,0x44,0x44,0x84,0x00,0x00,0x00,0x02,0x04,0x04,0x04,0x03,0x00,
"6",0x00,0x00,0xF0,0x48,0x44,0x44,0x80,0x00,0x00,0x00,0x03,0x04,0x04,0x04,0x03,0x00,
"7",0x00,0x00,0x0C,0x04,0x84,0x64,0x1C,0x00,0x00,0x00,0x00,0x06,0x01,0x00,0x00,0x00,
"8",0x00,0x00,0xB8,0x44,0x44,0x44,0xB8,0x00,0x00,0x00,0x03,0x04,0x04,0x04,0x03,0x00,
"9",0x00,0x00,0x38,0x44,0x44,0x44,0xF8,0x00,0x00,0x00,0x00,0x04,0x04,0x02,0x01,0x00,
"0",0x00,0x00,0xF8,0x04,0x04,0x04,0xF8,0x00,0x00,0x00,0x03,0x04,0x04,0x04,0x03,0x00,
};
#define ASC_HZ_WIDTH 16
typedef struct typFNT_GB16
{
charIndex[2];
charMsk[32];
};
uchar code Hanzi[]={
/*-- 調(diào)入了一幅圖像：C:\Documents and Settings\Administrator\桌面\12864.bmp --*/
/*-- 寬度x高度=128x64 用取模軟件取模，取模方式為：縱向取模，字節(jié)倒序--*/
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0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF,0x3F,0x0F,0x03,0x00,0x00,0x00,0x00,0x00,
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0xAF,0xFF,0xFF,0x0F,0x07,0x03,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x80,0x80,0xC0,
0xC0,0xE0,0x70,0x70,0x70,0x38,0x3C,0x1C,0x1C,0x0E,0x0E,0x07,0x07,0x07,0x03,0x03,
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0x40,0xC0,0xC0,0x80,0x80,0x80,0x80,0x88,0x93,0x80,0x90,0x80,0x88,0x84,0x84,0x80,
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0x36,0x11,0x18,0x08,0x04,0x02,0x01,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
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0x84,0x84,0xFC,0xB8,0xF8,0x78,0xF8,0xD8,0x78,0x38,0xFC,0x54,0xCA,0x7A,0xF9,0xF8,
0xF8,0xF8,0xFC,0xFC,0xFD,0x7D,0xFD,0xFE,0xFA,0xDF,0xFF,0xE1,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x7E,0x7F,0x01,0x40,0x4F,0x67,0x33,0x11,0x31,0x38,0x1C,0x34,0x22,
0x65,0x47,0x00,0x1F,0x7E,0x7C,0x40,0x40,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};
void Display(unsigned char sda,unsignedchar sda1)
{
unsigned char i,j,k=0;
for(i=0;i<8;i++)
{
Comwrite(0xb0+k);
Comwrite(0x10);
Comwrite(0x01); //設(shè)置起始例，0x00=SEG0，0x01=SEG1
for(j=0;j<64;j++)
{ Datwrite(sda);
Datwrite(sda1);
}
k++;
}
}
void Hanzi_Disp(void)
{
unsigned char i,j,k=0;
for(i=0;i<8;i++)
{
Comwrite(0xb0+k);
Comwrite(0x10);
Comwrite(0x01); //0x00=seg0,0x01=seg1
for(j=0;j<128;j++)
{Datwrite(Hanzi[i*128+j]);
}
k++;
}
}
void main()
{
P1M1=0x00;
P1M0=0xff;
P3M1=0x00;
P3M0=0xff;
CLK_DIV=0x02;
LcdInit();
while(1)
{
Clear();
Display(0xff,0xff);
Delayms(5000);
Display(0x55,0xaa);
Delayms(5000);
Display(0x00,0xff);
Delayms(5000);
Display(0xaa,0xaa);
Delayms(5000);
Display(0x55,0x55);
Delayms(5000);
Hanzi_Disp();
Delayms(5000);
Delayms(5000);
}
}
void Delayms(uint ms)
{
ucharj;
while(ms--)
for(j=0;j<=20;j++);
}
void Comwrite(uchar cmd)
{
uchar data i,j;
CS1=0;
R_S=0;
SCK=1;
for(i=0;i<8;i++)
{
j=cmd;
SCK=0;
SDA=cmd&0x80;
SCK=1;
cmd=j<<1;
}
CS1=1;
R_S=1;
}
void Datwrite(uchar dat)
{
uchar data i,j;
CS1=0;
R_S=1;
SCK=1;
for(i=0;i<8;i++)
{
j=dat;
SCK=0;
SDA=dat&0x80;
SCK=1;
dat=j<<1;
}
CS1=1;
R_S=0;
}
void Clear()
{
unsigned char i,j,m=0;
for(i=0;i<8;i++)
{
Setadd(0,i);
for(j=0;j<128;j++)
Datwrite(0x00);
}
}
void Setadd(uchar xl,uchar yl)
{ uchar i;
i=(xl+4)&0x0f; //i=(xl+0)&0x0f;（SEG0~SEG127） // i=(xl+4)&0x0f;（SEG4~SEG131）
xl=(xl>>4)+0x10;
Comwrite(0xb0+yl);
Comwrite(xl);
Comwrite(i);
}
void LcdInit()
{
RES=1;
Delayms(50);
RES=0;
Delayms(50);
RES=1;
Delayms(50);
Comwrite(0xE2); //Software Reset
Delayms(50);
Comwrite(0xA2); //SetBias 0xA3 1/7bias, 0xA2 1/9 bias
Comwrite(0xA0); //SegmentDirection Select bit0=0,normal,=1,reverse
Comwrite(0xC8); //CommonDirection Select bit3=0,normal,=1,revese
Comwrite(0xA8);
Comwrite(0xA6);
Comwrite(0xA4);
Comwrite(0x25); //調(diào)電壓對比度 Set internal rb/ra 0x24
Comwrite(0x81); //SetContrast
Comwrite(0x1a); //調(diào)電壓對比度 1a>1f
Comwrite(0x2F); //PowerControl Set
Delayms(5000); //delay 40mS
Comwrite(0x60); //SetDisplay Start Line
Comwrite(0xAF); //DisplayON
}
void disp_ch(unsigned char c,uCol,uPage)
{
unsignedchar k,j,ch_w;
unsignedchar width;
unsignedchar len;
len=sizeof(ASC_16)/sizeof(ASC_16[0]);
for(k=0;k<len;k++)
{
if(c== ASC_16[k].Index[0] ) break;
}
if(k<len)
{
if(c=='-'||c==':')
width=ASC_CHR_WIDTH-2;
elseif(c=='|')
width=ASC_HZ_WIDTH-ASC_CHR_WIDTH;
else
width=ASC_CHR_WIDTH;
Setadd(uCol,uPage);
for(j=0;j<width;j++)
{
ch_w=ASC_16[k].Msk[j];
Datwrite(ch_w);
}
Setadd(uCol,uPage+1);
for(j=0;j<width;j++)
{
ch_w=ASC_16[k].Msk[ASC_CHR_WIDTH+j];
Datwrite(ch_w);
}
}
}
void disp_str(unsigned char *p,unsignedchar uCol,uPage)
{
unsignedchar i=0;
while(p[ i]>0)
{
if(p[ i]< 128)
{
disp_ch(p[ i],uCol,uPage);
uCol+=8;
}
if(Flage1==1)Delayms(200);
i++;
}
}

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快速了解12864點陣液晶屏的使用方法（詳細）