Simulation and running of Proteus AT89C51 + lcd1602

1. The module corresponding to lcd1602 in protues is lm016l,

Its control chip is generally hd447780, but some are ks0066, and ks0066 can be compatible with HD44780.

Note that a 1 K resistor is required between V0 and VSS, and some must be adjusted by a 10 k potentiometer.

 

2.1602 pin

3. Proteus simulation

 

 

4: Code

 

1. <br/> // filename: Glocal. h <br/> // latest revise: 2010-07-01 <br/> // by: Alex shoal <br/> // Email: alex.shoal@gmail.com <br/> # define uchar unsigned char <br/> # define uint unsigned int <br/> 2. <br/> // filename: ks0066.h <br/> // latest revise: 2010-07-01 <br/> // by: Alex shoal <br/> // Email: alex.shoal@gmail.com <br/> # define data_port P1 <br/> // ------------------------------------------- <br/> // pin definition <br/> //----- ----------------------------------- <Br/> sbit rs = P2 ^ 0; // data (L)/command (h) Select <br/> sbit lcdrw = P2 ^ 1; // write, low level valid <br/> sbit en = P2 ^ 2; // enables, low level valid <br/> // ========================================== ============< br/> // function declaration <br/> // ----------------------------------------------------------- <br/> void delay_ LCD (char ); <br/> void write_data (char); <br/> void write_com (char); <br/> void LCD _init (); <br/> void delay_ms (char ); <br/> void print_stri Ng (char *); <br/> // functions <br/> // write data functions <br/> // -------------------------------------------------- <br/> void write_data (char dat) {<br/> rs = 1; // data <br/> lcdrw = 0; // write <br/> data_port = dat; // send the data to the P port <br/> delay_ms (5); // when the crystal oscillator is high, the delay is added. <br/> en = 1; <br/> delay_ms (5); // delay when the crystal oscillator is high <br/> en = 0; // disable enabling <br/>}< br/> // ------------------------------------------------ <br/> // write command functions <br/> //------- ----------------------------------- <Br/> void write_com (char com) {<br/> rs = 0; // command <br/> lcdrw = 0; // write <br/> data_port = com; <br/> delay_ms (5); // Add latency when the crystal oscillator is high <br/> en = 1; <br/> delay_ms (5); // delay when the crystal oscillator is high <br/> en = 0; <br/>}< br/> // -------------------------------------------- <br/> // 1602 initialization function <br/> // void LCD _init () <br/> () {<br/> lcdrw = 0; <br/> rs = 0; <br/> write_com (0x36 ); // Set text home address <br/> write_com (0x0f); // display switch, display on, cursor on, blink on. <br/> write_com (0x38); <br/> write_com (0x06); // input set. <br/> write_com (0x01); // screen clear <br/> write_com (0x80); // ddram ad set to 00 H, <br/>}< br/> void print_string (char * Str) {<br/> int I; <br/> for (I = 0; STR [I]! = 0; I ++) <br/>{</P> <p> write_data (STR [I]); <br/>}< br/> // latency <br/> // delay function <br/> // ---------------------------------------------- <br/> void delay_ms (uchar t) {<br/> Int J; <br/> for (; t! = 0; t --) <br/> for (j = 0; j <255; j ++); </P> <p >}< br/> 3. <br/> // latest revise: 2010-07-01 <br/> // by: Alex shoal <br/> // Email: alex.shoal@gmail.com <br/> # include <reg51.h> <br/> # include "Global. H "<br/> # include" ks0066.h "// for LCD 1602 <br/> main () {<br/> LCD _init (); </P> <p> print_string ("Hello world! "); <Br/> write_com (0xc0); // ddram ad set to 00 h, <br/> print_string (" this is Alex! "); <Br/> // write_com (0xc0); // ddram ad set to 00 h, <br/> // print_string (" XXX! "); <Br/> while (1); <br/>}< br/> 

 

5. Simulation results

 

6. Take a photo of the actual operation.

 

7. Other parts of the circuit.