4 Copyright 2008, 2009 Michel Pollet <buserror@gmail.com>
6 This file is part of simavr.
8 simavr is free software: you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation, either version 3 of the License, or
11 (at your option) any later version.
13 simavr is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with simavr. If not, see <http://www.gnu.org/licenses/>.
26 #include <GLUT/glut.h>
33 #include "avr_ioport.h"
36 #include "sim_vcd_file.h"
41 int do_button_press = 0;
44 uint8_t pin_state = 0; // current port B
50 * called when the AVR change any of the pins on port B
51 * so lets update our buffer
53 void pin_changed_hook(struct avr_irq_t * irq, uint32_t value, void * param)
55 pin_state = (pin_state & ~(1 << irq->irq)) | (value << irq->irq);
58 void displayCB(void) /* function called whenever redisplay needed */
60 // OpenGL rendering goes here...
61 glClear(GL_COLOR_BUFFER_BIT);
63 // Set up modelview matrix
64 glMatrixMode(GL_MODELVIEW); // Select modelview matrix
65 glLoadIdentity(); // Start with an identity matrix
68 float size = grid * 0.8;
72 for (int di = 0; di < 8; di++) {
73 char on = (pin_state & (1 << di)) != 0;
75 float x = (di) * grid;
76 float y = 0; //(si * grid * 8) + (di * grid);
77 glVertex2f(x + size, y + size);
78 glVertex2f(x, y + size);
80 glVertex2f(x + size, y);
86 //glFlush(); /* Complete any pending operations */
89 void keyCB(unsigned char key, int x, int y) /* called on key press */
93 static uint8_t buf[64];
100 do_button_press++; // pass the message to the AVR thread
103 printf("Starting VCD trace\n");
104 avr_vcd_start(&vcd_file);
107 printf("Stopping VCD trace\n");
108 avr_vcd_stop(&vcd_file);
113 // gl timer. if the pin have changed states, refresh display
116 static uint8_t oldstate = 0xff;
118 glutTimerFunc(1000/64, timerCB, 0);
120 if (oldstate != pin_state) {
121 oldstate = pin_state;
126 static void * avr_run_thread(void * oaram)
128 int b_press = do_button_press;
132 if (do_button_press != b_press) {
133 b_press = do_button_press;
134 printf("Button pressed\n");
135 button_press(&button, 1000000);
141 int main(int argc, char *argv[])
144 const char * fname = "atmega48_ledramp.axf";
147 // sprintf(path, "%s/%s", dirname(argv[0]), fname);
148 // printf("Firmware pathname is %s\n", path);
149 elf_read_firmware(fname, &f);
151 printf("firmware %s f=%d mmcu=%s\n", fname, (int)f.frequency, f.mmcu);
153 avr = avr_make_mcu_by_name(f.mmcu);
155 fprintf(stderr, "%s: AVR '%s' now known\n", argv[0], f.mmcu);
159 avr_load_firmware(avr, &f);
161 // initialize our 'peripheral'
162 button_init(avr, &button, "button");
163 // "connect" the output irw of the button to the port pin of the AVR
165 button.irq + IRQ_BUTTON_OUT,
166 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('C'), 0));
168 // connect all the pins on port B to our callback
169 for (int i = 0; i < 8; i++)
170 avr_irq_register_notify(
171 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('B'), i),
175 // even if not setup at startup, activate gdb if crashing
176 avr->gdb_port = 1234;
178 //avr->state = cpu_Stopped;
183 * VCD file initialization
185 * This will allow you to create a "wave" file and display it in gtkwave
186 * Pressing "r" and "s" during the demo will start and stop recording
189 avr_vcd_init(avr, "gtkwave_output.vcd", &vcd_file, 100000 /* usec */);
190 avr_vcd_add_signal(&vcd_file,
191 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('B'), IOPORT_IRQ_PIN_ALL), 8 /* bits */ ,
193 avr_vcd_add_signal(&vcd_file,
194 button.irq + IRQ_BUTTON_OUT, 1 /* bits */ ,
197 // 'raise' it, it's a "pullup"
198 avr_raise_irq(button.irq + IRQ_BUTTON_OUT, 1);
200 printf( "Demo launching: 'LED' bar is PORTB, updated every 1/64s by the AVR\n"
201 " firmware using a timer. If you press 'space' this presses a virtual\n"
202 " 'button' that is hooked to the virtual PORTC pin 0 and will\n"
203 " trigger a 'pin change interrupt' in the AVR core, and will 'invert'\n"
205 " Press 'q' to quit\n\n"
206 " Press 'r' to start recording a 'wave' file\n"
207 " Press 's' to stop recording\n"
211 * OpenGL init, can be ignored
213 glutInit(&argc, argv); /* initialize GLUT system */
215 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
216 glutInitWindowSize(8 * pixsize, 1 * pixsize); /* width=400pixels height=500pixels */
217 window = glutCreateWindow("Glut"); /* create window */
219 // Set up projection matrix
220 glMatrixMode(GL_PROJECTION); // Select projection matrix
221 glLoadIdentity(); // Start with an identity matrix
222 glOrtho(0, 8 * pixsize, 0, 1 * pixsize, 0, 10);
224 glTranslatef(0, -1 * pixsize, 0);
226 glutDisplayFunc(displayCB); /* set window's display callback */
227 glutKeyboardFunc(keyCB); /* set window's key callback */
228 glutTimerFunc(1000 / 24, timerCB, 0);
230 // the AVR run on it's own thread. it even allows for debugging!
232 pthread_create(&run, NULL, avr_run_thread, NULL);