Silvio Fonseca / LCDPanel_HX8340B

LCDPanel implementation for ITDB02-2.2SP LCD module using HX8340B controller

#include "mbed.h"

DigitalOut myled(LED1);

SPI spi(p5,NC,p7);
DigitalOut cs(p8);
DigitalOut rst(p9);

void command(unsigned int i) { spi.write(i&0xff); } // clear 9th bit for command
void data(unsigned int i) { spi.write(i|0x100); } // set 9th bit for data

void lcd_window(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2) {
    command(0x2A);  // column
    data(0x00);
    data(x1);
    data(0x00);
    data(x2);
    command(0x2B); // row
    data(0x00);
    data(y1);
    data(0x00);
    data(y2);
    command(0x2C); // start write to ram
}

void lcd_pixel(unsigned int c) {
    data(c>>8); data(c);
}

void lcd_fill(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2, unsigned int color) {
    cs=0;
    lcd_window(x1,y1,x2,y2);
    unsigned int total=(x2-x1+1)*(y2-y1+1);
    for (unsigned int i=0;i<total;i++) { lcd_pixel(color); }
    cs=1;
}

void lcd_clear() {
    lcd_fill(0,0,176,220,0);
}

void lcd_init() {
    cs = 1;
    rst = 0;
    spi.format(9);
    spi.frequency(5000000);
    wait_ms(1);
    rst = 1;
    wait_ms(1);
    cs = 0;
    
    command(0xC1);
    data(0xff);
    data(0x83);
    data(0x40);
    command(0x11);
    wait_ms(150);
    command(0xca);
    data(0x70);
    data(0x00);
    data(0xD9);
    command(0xb0);
    data(0x01);
    data(0x11);
    command(0xc9);
    data(0x90);
    data(0x49);
    data(0x10);
    data(0x28);
    data(0x28);
    data(0x10);
    data(0x00);
    data(0x06);
    wait_ms(20);
    command(0xc2);
    data(0x60);
    data(0x71);
    data(0x01);
    data(0x0e);
    data(0x05);
    data(0x02);
    data(0x09);
    data(0x31);
    data(0x0A);
    command(0xc3);
    data(0x67);
    data(0x30);
    data(0x61);
    data(0x17);
    data(0x48);
    data(0x07);
    data(0x05);
    data(0x33); 
    wait_ms(10);
    command(0xb5);
    data(0x35);
    data(0x20);
    data(0x45); 
    command(0xb4);
    data(0x33);
    data(0x25);
    data(0x4c); 
    wait_ms(10);
    command(0x3a);
    data(0x05);
    command(0x29); 
    wait_ms(10);
    cs=1;
    lcd_clear();
}

int main() {
    lcd_init();
    lcd_fill(9,9,166,210,0xff);
    lcd_fill(19,19,156,200,0x0ff00);
    while(1) {
        myled = 1;
        wait(0.2);
        myled = 0;
        wait(0.2);
    }
}

LCDPanel_HX8340B.h

Committer:
silviogissi
Date:
2012-03-11
Revision:
1:5dbe0bb6f7e4
Parent:
0:6339553f69a4

File content as of revision 1:5dbe0bb6f7e4:

/* LCDPanel base library for LCD/TFT Panels
 * Copyright (c) 2012, Silvio Gissi
 * 
 * License:
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 * Author: Silvio Gissi
 * Version: 0.1 Alfa
 * References:
 * 	Based on demo code from iTeadStudio (www.iteadstudio.com) for
 * 	ITDB02-2.2SP. License unknown.
 * 
 * Known modules:
 * 	ITDB02-2.2SP (www.iteadstudio.com)
*/

#ifndef LCDPANEL_HX8340B_H
#define LCDPANEL_HX8340B_H

#include "LCDPanel_SPI.h"

#define LCDPANEL_HX8340B_HEIGHT 220
#define LCDPANEL_HX8340B_WIDTH  176

class LCDPanel_HX8340B : public LCDPanel_SPI {
    public:
        LCDPanel_HX8340B(PinName spi_data, PinName spi_clock, PinName cs, PinName rst);
    protected:
        virtual void window(unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2);

};

#endif // LCDPANEL_HX8340B_H