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Interfaces de un Dispositivo lógico programable, Apuntes de Informática

Encontrarás una practica de un LCD para uso de dispositivo digital

Tipo: Apuntes

2022/2023

Subido el 12/10/2023

arturo-sanchez-50
arturo-sanchez-50 🇲🇽

1 documento

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bg1
#include<reg51.h>
/********************************************* LCD control signals declaration
***************************************************/
sbit RS = P0^0; // <span id="IL_AD1" class="IL_AD">Register</span> Select line
//sbit RW = P0^1; // Read/write line
sbit Enable = P0^1; // Enable line
#define LCD_PORT P2 // define port
/********************************************* LCD function prototypes
************************************************/
void send_cmd(unsigned char);
void send_data(unsigned char*);
void send_char(unsigned char);
void LCD_init(void);
void delayms(unsigned int);
/********************************************* Main Funciton declaration
***********************************************/
void main()
{
LCD_PORT = 0x00; // Make the port as output port
LCD_init(); // LCD initialization
// while(1)
pf3
pf4

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#include<reg51.h> /********************************************* LCD control signals declaration ***************************************************/ sbit RS = P0^0; // Register Select line //sbit RW = P0^1; // Read/write line sbit Enable = P0^1; // Enable line #define LCD_PORT P2 // define port /********************************************* LCD function prototypes ************************************************/ void send_cmd(unsigned char); void send_data(unsigned char*); void send_char(unsigned char); void LCD_init(void); void delayms(unsigned int); /********************************************* Main Funciton declaration ***********************************************/ void main() { LCD_PORT = 0x00; // Make the port as output port LCD_init(); // LCD initialization // while(1)

send_cmd(0x80); // Force cursor to beginning of 1st line, if the number is 0x83 then force the cursor to 53rd position delayms(100); // Delay of 100millisec send_char('S'); // Send data send_char('J'); // Send data send_char('E'); // Send data send_char('C'); // Send data send_cmd(0xC0); // Force cursor to beginning of 2nd line delayms(100); // Delay of 100millisec send_char('I'); // Send data send_char('O'); // Send data send_char('A'); // Send data //} } /********************************************* LCD Initialization Function declaration ********************************/ void LCD_init() { send_cmd(0x38); // configuring LCD as 2 line 5x7 matrix

// RW = 0; // write operation Enable = 1; // High to Low pulse provided on the enable pin with nearly 1ms(>450ns) delayms(1); // 1 millisec delay Enable = 0; } /******************************************* delayms Function declaration***********************************************/ void delayms(unsigned int val) { unsigned int i,j; for(i=0;i<=val;i++) { for(j=0;j<=2;j++) ; //nop(); // no operation produce 1us time delay } }