Revision 0:12860941a8a1, committed 2020-11-26

Comitter:

Marcelocostanzo

Date:

Thu Nov 26 18:11:13 2020 +0000

Commit message:

LCD1602 com minimo de arquivos necessarios

Changed in this revision

diff -r 000000000000 -r 12860941a8a1 LCD_1602.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_1602.cpp	Thu Nov 26 18:11:13 2020 +0000
@@ -0,0 +1,136 @@
+#include "LCD_1602.h"
+
+DigitalOut LCD_RS_pin(D8);
+DigitalOut LCD_EN_Pin(D9);
+DigitalOut LCD_D7_Pin(D7);
+DigitalOut LCD_D6_Pin(D6);
+DigitalOut LCD_D5_Pin(D5);
+DigitalOut LCD_D4_Pin(D4);
+
+
+void send_to_lcd (char data, int rs)
+{
+    LCD_RS_pin = rs;  // rs = 1 for data, rs=0 for command
+
+    /* write the data to the respective pin */
+    LCD_D7_Pin = (data>>3)&0x01;
+    LCD_D6_Pin = (data>>2)&0x01;
+    LCD_D5_Pin = (data>>1)&0x01;
+    LCD_D4_Pin = (data>>0)&0x01;
+
+    /* Toggle EN PIN to send the data
+     * if the HCLK > 100 MHz, use the  20 us delay
+     * if the LCD still doesn't work, increase the delay to 50, 80 or 100..
+     */
+    LCD_EN_Pin = 1;
+    wait_ms(1);
+    LCD_EN_Pin = 0;
+    wait_ms(1);
+}
+
+void lcd_cursor_mode(char cursor, char blink)
+{
+    if(cursor == 1)
+    {
+        lcd_send_cmd((0x0C)|0x02);
+    }
+    
+    else
+    {
+        lcd_send_cmd((0x0C)&0x00);
+    }
+    
+    if(blink == 1)
+    {
+        lcd_send_cmd((0x0C)|0x01);
+    }
+    
+    else
+    {
+        lcd_send_cmd((0x0C)&0x00);
+    }
+}
+
+void lcd_send_cmd (char cmd)
+{
+    char datatosend;
+
+    /* send upper nibble first */
+    datatosend = ((cmd>>4)&0x0f);
+    send_to_lcd(datatosend,0);  // RS must be 0 while sending command
+
+    /* send Lower Nibble */
+    datatosend = ((cmd)&0x0f);
+    send_to_lcd(datatosend, 0);
+}
+
+void lcd_send_char (char data)
+{
+    char datatosend;
+
+    /* send higher nibble */
+    datatosend = ((data>>4)&0x0f);
+    send_to_lcd(datatosend, 1);  // rs =1 for sending data
+
+    /* send Lower nibble */
+    datatosend = ((data)&0x0f);
+    send_to_lcd(datatosend, 1);
+}
+
+void lcd_clear (void)
+{
+    lcd_send_cmd(0x01);
+    wait_ms(2);
+}
+
+void lcd_put_cur(int row, int col)
+{
+    switch (row)
+    {
+        case 0:
+            col |= 0x80;
+            break;
+        case 1:
+            col |= 0xC0;
+            break;
+    }
+
+    lcd_send_cmd (col);
+}
+
+
+void lcd_init (void)
+{
+    // 4 bit initialisation
+    wait_ms(50);  // wait for >40ms
+    lcd_send_cmd (0x00);
+    wait_ms(5);  // wait for >4.1ms
+    lcd_send_cmd (0x03);
+    wait_ms(1);  // wait for >100us
+    lcd_send_cmd (0x03);
+    wait_ms(10);
+    lcd_send_cmd (0x03);  // 4bit mode
+    wait_ms(10);
+
+  // dislay initialisation
+    lcd_send_cmd (0x02); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
+    wait_ms(1);
+    lcd_send_cmd (0x02); //Display on/off control --> D=0,C=0, B=0  ---> display off
+    wait_ms(1);
+    lcd_send_cmd (0x08);  // clear display
+    wait_ms(1);
+    wait_ms(1);
+    lcd_send_cmd (0x00); //Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
+    wait_ms(1);
+    lcd_send_cmd (0x0C); //Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
+    wait_ms(1);
+    lcd_send_cmd (0x00); 
+    wait_ms(1);
+    lcd_send_cmd (0x06);
+}
+
+void lcd_send_string (char *str)
+{
+    while (*str) lcd_send_char (*str++);
+}
+

diff -r 000000000000 -r 12860941a8a1 LCD_1602.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LCD_1602.h	Thu Nov 26 18:11:13 2020 +0000
@@ -0,0 +1,19 @@
+#include "mbed.h"
+#ifndef LCD_1602_H
+#define LCD_1602_H
+
+void lcd_init (void);   // initialize lcd
+
+void lcd_send_cmd (char cmd);  // send command to the lcd
+
+void lcd_send_char (char data);  // send data to the lcd
+
+void lcd_send_string (char *str);  // send string to the lcd
+
+void lcd_put_cur(int row, int col);  // put cursor at the entered position row (0 or 1), col (0-15);
+
+void lcd_clear (void);
+
+void lcd_cursor_mode(char cursor, char blink);
+
+#endif

diff -r 000000000000 -r 12860941a8a1 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 26 18:11:13 2020 +0000
@@ -0,0 +1,35 @@
+#include "mbed.h"
+#include "meuLCD1602.h"
+
+DigitalOut led(LED1);
+
+int i;
+char strBuffer[64];
+
+int main()
+{
+    lcd_init();
+    lcd_clear();
+    lcd_cursor_mode(0,0);
+    
+    lcd_send_char(0x4F);//O
+    lcd_send_char(0x4C);//L
+    lcd_send_char(0x41);//A
+    lcd_send_char(0x20);// 
+    lcd_send_char(0x32);//2
+    lcd_send_char(0x30);//0
+    lcd_send_char(0x32);//2
+    lcd_send_char(0x30);//0
+    
+    wait_ms(1000);
+    lcd_clear();
+       
+    while(1) 
+    {
+        lcd_put_cur(0,0);
+        sprintf(strBuffer, "%i", i);
+        lcd_send_string(strBuffer);
+        i++;
+        wait_ms(1000);
+    }
+}

diff -r 000000000000 -r 12860941a8a1 mbed.bld
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Nov 26 18:11:13 2020 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file