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/*
charlcd.c
Copyright Luki <humbell@ethz.ch>
Copyright 2011 Michel Pollet <buserror@gmail.com>
Copyright 2014 Doug Szumski <d.s.szumski@gmail.com>
This file is part of simavr.
simavr is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
simavr is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with simavr. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <libgen.h>
#include "sim_avr.h"
#include "avr_ioport.h"
#include "sim_elf.h"
#include "sim_gdb.h"
#if __APPLE__
#include <GLUT/glut.h>
#else
#include <GL/glut.h>
#endif
#include <pthread.h>
#include "ssd1306_glut.h"
int window_identifier;
avr_t * avr = NULL;
ssd1306_t ssd1306;
int win_width, win_height;
static void *
avr_run_thread (void * ignore)
{
while (1)
{
avr_run (avr);
}
return NULL;
}
/* Called on a key press */
void
keyCB (unsigned char key, int x, int y)
{
switch (key)
{
case 'q':
exit (0);
break;
}
}
/* Function called whenever redisplay needed */
void
displayCB (void)
{
const uint8_t seg_remap_default = ssd1306_get_flag (
&ssd1306, SSD1306_FLAG_SEGMENT_REMAP_0);
const uint8_t seg_comscan_default = ssd1306_get_flag (
&ssd1306, SSD1306_FLAG_COM_SCAN_NORMAL);
glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// Set up projection matrix
glMatrixMode (GL_PROJECTION);
// Start with an identity matrix
glLoadIdentity ();
glOrtho (0, win_width, 0, win_height, 0, 10);
// Apply vertical and horizontal display mirroring
glScalef (seg_remap_default ? 1 : -1, seg_comscan_default ? -1 : 1, 1);
glTranslatef (seg_remap_default ? 0 : -win_width, seg_comscan_default ? -win_height : 0, 0);
// Select modelview matrix
glMatrixMode (GL_MODELVIEW);
glPushMatrix ();
// Start with an identity matrix
glLoadIdentity ();
ssd1306_gl_draw (&ssd1306);
glPopMatrix ();
glutSwapBuffers ();
}
// gl timer. if the lcd is dirty, refresh display
void
timerCB (int i)
{
// restart timer
glutTimerFunc (1000 / 64, timerCB, 0);
glutPostRedisplay ();
}
int
initGL (int w, int h, float pix_size)
{
win_width = w * pix_size;
win_height = h * pix_size;
// Double buffered, RGB disp mode.
glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE);
glutInitWindowSize (win_width, win_height);
window_identifier = glutCreateWindow ("SSD1306 128x64 OLED");
// Set window's display callback
glutDisplayFunc (displayCB);
// Set window's key callback
glutKeyboardFunc (keyCB);
glutTimerFunc (1000 / 24, timerCB, 0);
ssd1306_gl_init (pix_size, SSD1306_GL_WHITE);
return 1;
}
int
main (int argc, char *argv[])
{
elf_firmware_t f;
const char * fname = "atmega32_ssd1306.axf";
char path[256];
sprintf (path, "%s/%s", dirname (argv[0]), fname);
printf ("Firmware pathname is %s\n", path);
elf_read_firmware (fname, &f);
printf ("firmware %s f=%d mmcu=%s\n", fname, (int) f.frequency, f.mmcu);
avr = avr_make_mcu_by_name (f.mmcu);
if (!avr)
{
fprintf (stderr, "%s: AVR '%s' not known\n", argv[0], f.mmcu);
exit (1);
}
avr_init (avr);
avr_load_firmware (avr, &f);
ssd1306_init (avr, &ssd1306, 128, 64);
// SSD1306 wired to the SPI bus, with the following additional pins:
ssd1306_wiring_t wiring =
{
.chip_select.port = 'B',
.chip_select.pin = 4,
.data_instruction.port = 'B',
.data_instruction.pin = 1,
.reset.port = 'B',
.reset.pin = 3,
};
ssd1306_connect (&ssd1306, &wiring);
printf ("SSD1306 display demo\n Press 'q' to quit\n");
// Initialize GLUT system
glutInit (&argc, argv);
initGL (ssd1306.columns, ssd1306.rows, 2.0);
pthread_t run;
pthread_create (&run, NULL, avr_run_thread, NULL);
glutMainLoop ();
}
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