MSP430 MCU simulation example 14-LCD1602 liquid crystal display characters based on Proteus

tiankai001

MSP430 MCU simulation example 14-LCD1602 liquid crystal display characters based on Proteus [Copy link]

 

This content is originally created by EEWORLD forum user tiankai001. If you need to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the source. 1. Task requirements

Use the MSP30F247 microcontroller to drive the LCD1602 liquid crystal to display two lines of characters: the first line displays "lao ma shi tu mcu", and the second line displays "msp430f247 study".

2. Hardware circuit

The hardware circuit is shown in the figure below. Select the P2 port of MSP430F247 microcontroller to connect the data lines D0~D7 of LCD1602, P3.0, P3.1, and P3.2 are respectively connected to the enable EN port, read/write RW port, and register RS port of LCD1602 to generate the timing required by LCD1602.

3. Programming

//main.c

#include "msp430f247.h"

#include "stdlib.h"

#include "string.h"

/************************************************Software delay, clocked at 1M**********************/

#define CPU_F1 ((double)1000000)

#define delay_us1M(x) __delay_cycles((long)(CPU_F1*(double)x/1000000.0))

#define delay_ms1M(x) __delay_cycles((long)(CPU_F1*(double)x/1000.0))

/****************************************************************************/

#define SET_RS P3OUT |= BIT2

#define RST_RS P3OUT &= ~BIT2

#define SET_RW P3OUT |= BIT1

#define RST_RW P3OUT &= ~BIT1

#define SET_E P3OUT |= BIT0

#define RST_E P3OUT &= ~BIT0

//

const unsigned char Table1[]={"lao ma shi tu mcu"};

const unsigned char Table2[]={"msp430f247 study"};

void write_com(unsigned char com);//Write command function

void write_dat(unsigned char dat);//Write data function

/****************************************************

Function name: main function

Function: LCD1602 liquid crystal display character

Input parameters: None

Output parameters: None

Description:

Author: Lao Ma Shi Tu Microcontroller

Date: January 6, 2018

********************************************************/

main()

{

unsigned char i;

WDTCTL = WDTPW + WDTHOLD;//Turn off the watchdog

P2DIR=0xff;//Port initialization

P3DIR=BIT0+BIT1+BIT2;

RST_E;

write_com(0x38);//Set 16*2 display, 5*7 dot matrix, 8-bit data interface

delay_ms1M(5);

write_com(0x01);//Display clear screen

delay_m s1M(5);

write_com(0x0c);//Display switch, cursor setting

delay_ms1M(5);

write_com(0x06);//Display switch, cursor setting

delay_ms1M(5);

write_com(0x80);//Data pointer setting, first line display

delay_ms1M(5);

for(i=0;i程序首先对端口进行初始化，将单片机与液晶LCD1602相连的端口设置为输出端口，并对液晶进行初始化设置。在液晶的程序设计中，用了一些宏定义实现对液晶RS,RW,EN等引脚的高低电平的控制，其顺序是按照液晶显示时序设计的。

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write_dat(Table1);

}

write_com(0x80+0x40);//数据指针设置，第二行显示

delay_ms1M(5);

for(i=0;i<sizeof(Table2);i++)

{

write_dat(Table2);

}

while(1)

{

}

}

void" char="" com)[="" dat)[="" div="" write_com(unsigned="" write_dat(unsigned="">

I found a small error in the original poster's program, write_dat(Table1); should be changed to write_dat( Table1 ); write_dat( Table2); should be changed to write_dat( Table2 );

I don't know why I couldn't type the brackets "[]" in my reply just now, so it's the same as not replying at all. I'm really sorry. However, there are indeed two sentences in the original poster's program that are missing brackets "[]"

13432812441 Posted on 2018-2-26 16:38 I don't know why I can't type the brackets "[]" in my reply just now, so it's the same as not replying. I'm really sorry. But there are two sentences in the original poster's program...[/quote] Sorry, where is the missing "[]", please correct me. This program can run normally when I simulate it

tiankai001 posted on 2018-2-27 08:58 Sorry, I am missing a “[]” somewhere. Please correct me. This program can run normally when I simulate it[/quote] There are two small errors: (1) write_dat(Table1); should be changed to write_dat(Table1[ i ]); (2) write_dat(Table2); should be changed to write_dat(Table2[ i ]);

13432812441 Published on 2018-2-27 12:08 There are two small errors: (1) write_dat(Table1); should be changed to write_dat(Table1[ i ]); (2) write_dat(Table2); should be...[/quote] Thank you for pointing out the error. I carefully compared my source code and found that it was correct. I don’t know why it changed after I pasted it out.

[quote]tiankai001 posted on 2018-2-27 12:23 Thank you for pointing out the error. I carefully compared my source code and found that it was correct. I don’t know why it changed after pasting it out.

In fact, when I typed the brackets “[]”, I also found that they were clearly typed, but they disappeared after publishing. Later, I added a space character in the brackets and it was fixed

[quote]13432812441 Published on 2018-2-27 22:06 Actually, when I was typing the brackets “[]”, I also found that they were clearly typed, but they disappeared after posting. Later, I added a space character inside the brackets...

Oh, so that’s how it is. I learned another trick. Thank you very much

[quote]tiankai001 posted on 2018-2-28 08:46 Oh, so that's how it is. I learned another trick. Thank you very much

You're welcome. I should say thank you very much for the information shared by the host.

gangxie

MSP430 MCU simulation example 14-LCD1602 liquid crystal display characters based on Proteus

13432812441

I found a small error in the original poster's program, write_dat(Table1); should be changed to write_dat( Table1 ); write_dat( Table2); should be changed to write_dat( Table2 );

13432812441

I don't know why I couldn't type the brackets "[]" in my reply just now, so it's the same as not replying at all. I'm really sorry. However, there are indeed two sentences in the original poster's program that are missing brackets "[]"

tiankai001

13432812441 Posted on 2018-2-26 16:38 I don't know why I can't type the brackets "[]" in my reply just now, so it's the same as not replying. I'm really sorry. But there are two sentences in the original poster's program...

Sorry, where is the missing "[]", please correct me. This program can run normally when I simulate it

13432812441

tiankai001 posted on 2018-2-27 08:58 Sorry, I am missing a “[]” somewhere. Please correct me. This program can run normally when I simulate it

There are two small errors: (1) write_dat(Table1); should be changed to write_dat(Table1[ i ]); (2) write_dat(Table2); should be changed to write_dat(Table2[ i ]);

tiankai001

13432812441 Published on 2018-2-27 12:08 There are two small errors: (1) write_dat(Table1); should be changed to write_dat(Table1[ i ]); (2) write_dat(Table2); should be...

Thank you for pointing out the error. I carefully compared my source code and found that it was correct. I don’t know why it changed after I pasted it out.

13432812441

tiankai001 posted on 2018-2-27 12:23 Thank you for pointing out the error. I carefully compared my source code and found that it was correct. I don’t know why it changed after pasting it out.

In fact, when I typed the brackets “[]”, I also found that they were clearly typed, but they disappeared after publishing. Later, I added a space character in the brackets and it was fixed

tiankai001

13432812441 Published on 2018-2-27 22:06 Actually, when I was typing the brackets “[]”, I also found that they were clearly typed, but they disappeared after posting. Later, I added a space character inside the brackets...

Oh, so that’s how it is. I learned another trick. Thank you very much

13432812441

tiankai001 posted on 2018-2-28 08:46 Oh, so that's how it is. I learned another trick. Thank you very much

You're welcome. I should say thank you very much for the information shared by the host.

stp111

gangxie