Rodrigo Almeida / pqdb

Pão de Queijo Development Board. This repo has all libraries from pqdb shield.

Dependents:   pqdb_demo

Pão de Queijo development board is a shield for add-on on any arduino compatible board.

/media/uploads/rmaalmeida/compatibilidade_branco.png

This project presents the libraries to control the board peripherals using mbed framework. The libraries works as interfaces to keep the main code compatible with the examples from the book "Programação de sistemas embarcados". The peripherals on the board are presented on the folowing picture

/media/uploads/rmaalmeida/pqdb_perifericos.png

The main objective of the project is to develop a low cost, easy to assemble board with a group of peripheral that allows one to start learning embedded systems. The board was routed on one side copper PCB to make easier to buid it yourself.

/media/uploads/rmaalmeida/pqdb_fenolite_-_cortada.png

The source code for Arduino boards (wiring) can be found on: https://github.com/projetopqdb/PQDB-Arduino

The source code for freedom frdm KL05 board (using direct register access) can be found on: https://github.com/projetopqdb/PQDB-KL05Z

The source code from the board schematics and layout can be found on: https://github.com/projetopqdb/PQDB-Hardware

lcd.cpp@6:3fb450ba1e95, 2017-10-03 (annotated)

Committer:
rmaalmeida
Date:
Tue Oct 03 01:27:24 2017 +0000
Revision:
6:3fb450ba1e95
Parent:
1:083267bc0a0e 
timer driver added

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rmaalmeida 1:083267bc0a0e 1 #include "so.h"
rmaalmeida 1:083267bc0a0e 2 //#include "io.h"
rmaalmeida 1:083267bc0a0e 3 #include "lcd.h"
rmaalmeida 1:083267bc0a0e 4 #include "mbed.h"
rmaalmeida 1:083267bc0a0e 5 #include "ssd.h"
rmaalmeida 1:083267bc0a0e 6 //#define LCD_RS_PIN 7
rmaalmeida 1:083267bc0a0e 7 //#define LCD_EN_PIN 6
rmaalmeida 1:083267bc0a0e 8
rmaalmeida 1:083267bc0a0e 9 DigitalOut LCD_RS_PIN(D7);
rmaalmeida 1:083267bc0a0e 10 DigitalOut LCD_EN_PIN(D6);
rmaalmeida 1:083267bc0a0e 11
rmaalmeida 1:083267bc0a0e 12
rmaalmeida 1:083267bc0a0e 13 //Gera um clock no enable
rmaalmeida 1:083267bc0a0e 14 void pulseEnablePin() {
rmaalmeida 1:083267bc0a0e 15 //digitalWrite(LCD_EN_PIN, HIGH);
rmaalmeida 1:083267bc0a0e 16 LCD_EN_PIN =1;
rmaalmeida 1:083267bc0a0e 17 //wait_us(5);
rmaalmeida 1:083267bc0a0e 18 //digitalWrite(LCD_EN_PIN, LOW);
rmaalmeida 1:083267bc0a0e 19 LCD_EN_PIN = 0;
rmaalmeida 1:083267bc0a0e 20 // wait_us(5);
rmaalmeida 1:083267bc0a0e 21 }
rmaalmeida 1:083267bc0a0e 22 //Envia 4 bits e gera um clock no enable
rmaalmeida 1:083267bc0a0e 23 void pushNibble(char value, int rs) {
rmaalmeida 1:083267bc0a0e 24 ssdOff();
rmaalmeida 1:083267bc0a0e 25 soWrite(value);
rmaalmeida 1:083267bc0a0e 26 //digitalWrite(LCD_RS_PIN, rs);
rmaalmeida 1:083267bc0a0e 27 LCD_RS_PIN = rs;
rmaalmeida 1:083267bc0a0e 28 pulseEnablePin();
rmaalmeida 1:083267bc0a0e 29 }
rmaalmeida 1:083267bc0a0e 30 //Envia 8 bits em dois pacotes de 4
rmaalmeida 1:083267bc0a0e 31 void pushByte(char value, int rs) {
rmaalmeida 1:083267bc0a0e 32 ssdOff();
rmaalmeida 1:083267bc0a0e 33 soWrite(value >> 4);
rmaalmeida 1:083267bc0a0e 34 // digitalWrite(LCD_RS_PIN, rs);
rmaalmeida 1:083267bc0a0e 35 LCD_RS_PIN = rs;
rmaalmeida 1:083267bc0a0e 36 pulseEnablePin();
rmaalmeida 1:083267bc0a0e 37
rmaalmeida 1:083267bc0a0e 38 soWrite(value & 0x0F);
rmaalmeida 1:083267bc0a0e 39 // digitalWrite(LCD_RS_PIN, rs);
rmaalmeida 1:083267bc0a0e 40 LCD_RS_PIN = rs;
rmaalmeida 1:083267bc0a0e 41 pulseEnablePin();
rmaalmeida 1:083267bc0a0e 42 }
rmaalmeida 1:083267bc0a0e 43 void lcdCommand(char value) {
rmaalmeida 1:083267bc0a0e 44 pushByte(value, 0);
rmaalmeida 1:083267bc0a0e 45 wait_us(40);
rmaalmeida 1:083267bc0a0e 46 if((value==0x03)||(value==0x02)||(value==0x01)){
rmaalmeida 1:083267bc0a0e 47 wait_ms(2);
rmaalmeida 1:083267bc0a0e 48 }
rmaalmeida 1:083267bc0a0e 49 }
rmaalmeida 1:083267bc0a0e 50 void lcdPosition(int line, int col) {
rmaalmeida 1:083267bc0a0e 51 if (line == 0) {
rmaalmeida 1:083267bc0a0e 52 lcdCommand(0x80 + (col % 16));
rmaalmeida 1:083267bc0a0e 53 }
rmaalmeida 1:083267bc0a0e 54 if (line == 1) {
rmaalmeida 1:083267bc0a0e 55 lcdCommand(0xC0 + (col % 16));
rmaalmeida 1:083267bc0a0e 56 }
rmaalmeida 1:083267bc0a0e 57 }
rmaalmeida 1:083267bc0a0e 58 void lcdChar(char value) {
rmaalmeida 1:083267bc0a0e 59 pushByte(value, 1);
rmaalmeida 1:083267bc0a0e 60 wait_us(80);
rmaalmeida 1:083267bc0a0e 61 }
rmaalmeida 1:083267bc0a0e 62 //Imprime um texto (vetor de char)
rmaalmeida 1:083267bc0a0e 63 void lcdString(char msg[]) {
rmaalmeida 1:083267bc0a0e 64 int i = 0;
rmaalmeida 1:083267bc0a0e 65 while (msg[i] != 0) {
rmaalmeida 1:083267bc0a0e 66 lcdChar(msg[i]);
rmaalmeida 1:083267bc0a0e 67 i++;
rmaalmeida 1:083267bc0a0e 68 }
rmaalmeida 1:083267bc0a0e 69 }
rmaalmeida 1:083267bc0a0e 70 void lcdNumber(int value) {
rmaalmeida 1:083267bc0a0e 71 int i = 10000; //M�ximo 99.999
rmaalmeida 1:083267bc0a0e 72 while (i > 0) {
rmaalmeida 1:083267bc0a0e 73 lcdChar((value / i) % 10 + 48);
rmaalmeida 1:083267bc0a0e 74 i /= 10;
rmaalmeida 1:083267bc0a0e 75 }
rmaalmeida 1:083267bc0a0e 76 }
rmaalmeida 1:083267bc0a0e 77 // Rotina de incializa��o
rmaalmeida 1:083267bc0a0e 78 void lcdInit() {
rmaalmeida 1:083267bc0a0e 79 // pinMode(LCD_EN_PIN, OUTPUT);
rmaalmeida 1:083267bc0a0e 80 // pinMode(LCD_RS_PIN, OUTPUT);
rmaalmeida 1:083267bc0a0e 81 soInit();
rmaalmeida 1:083267bc0a0e 82 ssdOff();
rmaalmeida 1:083267bc0a0e 83 wait_ms(15);
rmaalmeida 1:083267bc0a0e 84 // Comunica��o come�a em estado incerto
rmaalmeida 1:083267bc0a0e 85 pushNibble(0x03, 0);
rmaalmeida 1:083267bc0a0e 86 wait_ms(5);
rmaalmeida 1:083267bc0a0e 87 pushNibble(0x03, 0);
rmaalmeida 1:083267bc0a0e 88 wait_us(160);
rmaalmeida 1:083267bc0a0e 89 pushNibble(0x03, 0);
rmaalmeida 1:083267bc0a0e 90 wait_us(160);
rmaalmeida 1:083267bc0a0e 91 // Mudando comunica��o para 4 bits
rmaalmeida 1:083267bc0a0e 92 pushNibble(0x02, 0);
rmaalmeida 1:083267bc0a0e 93 wait_ms(10);
rmaalmeida 1:083267bc0a0e 94 // Configura o display
rmaalmeida 1:083267bc0a0e 95 lcdCommand(0x28); //8bits, 2 linhas, fonte: 5x8
rmaalmeida 1:083267bc0a0e 96 lcdCommand(0x08 + 0x04); //display on
rmaalmeida 1:083267bc0a0e 97 lcdCommand(0x01); //limpar display, voltar p/ posi��o 0
rmaalmeida 1:083267bc0a0e 98 }