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/>.
29 #include "avr_ioport.h"
36 int do_button_press = 0;
38 uint8_t pin_state = 0; // current port B
44 * called when the AVR change any of the pins on port B
45 * so lets update our buffer
47 void pin_changed_hook(struct avr_irq_t * irq, uint32_t value, void * param)
49 pin_state = (pin_state & ~(1 << irq->irq)) | (value << irq->irq);
52 void displayCB(void) /* function called whenever redisplay needed */
54 // OpenGL rendering goes here...
55 glClear(GL_COLOR_BUFFER_BIT);
57 // Set up modelview matrix
58 glMatrixMode(GL_MODELVIEW); // Select modelview matrix
59 glLoadIdentity(); // Start with an identity matrix
62 float size = grid * 0.8;
66 for (int di = 0; di < 8; di++) {
67 char on = (pin_state & (1 << di)) != 0;
69 float x = (di) * grid;
70 float y = 0; //(si * grid * 8) + (di * grid);
71 glVertex2f(x + size, y + size);
72 glVertex2f(x, y + size);
74 glVertex2f(x + size, y);
80 //glFlush(); /* Complete any pending operations */
83 void keyCB(unsigned char key, int x, int y) /* called on key press */
87 static uint8_t buf[64];
94 do_button_press++; // pass the message to the AVR thread
99 // gl timer. if the pin have changed states, refresh display
102 static uint8_t oldstate = 0xff;
104 glutTimerFunc(1000/64, timerCB, 0);
106 if (oldstate != pin_state) {
107 oldstate = pin_state;
112 static void * avr_run_thread(void * oaram)
114 int b_press = do_button_press;
118 if (do_button_press != b_press) {
119 b_press = do_button_press;
120 printf("Button pressed\n");
121 button_press(&button, 1000000);
127 int main(int argc, char *argv[])
130 const char * fname = "atmega48_ledramp.axf";
132 elf_read_firmware(fname, &f);
134 printf("firmware %s f=%d mmcu=%s\n", fname, (int)f.mmcu.f_cpu, f.mmcu.name);
136 avr = avr_make_mcu_by_name(f.mmcu.name);
138 fprintf(stderr, "%s: AVR '%s' now known\n", argv[0], f.mmcu.name);
142 avr_load_firmware(avr, &f);
144 // initialize our 'peripheral'
145 button_init(avr, &button);
146 // "connect" the output irw of the button to the port pin of the AVR
148 button.irq + IRQ_BUTTON_OUT,
149 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('C'), 0));
150 // 'raise' it, it's a "pullup"
151 avr_raise_irq(button.irq + IRQ_BUTTON_OUT, 1);
153 // connect all the pins on port B to our callback
154 for (int i = 0; i < 8; i++)
155 avr_irq_register_notify(
156 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('B'), i),
160 // even if not setup at startup, activate gdb if crashing
161 avr->gdb_port = 1234;
163 //avr->state = cpu_Stopped;
168 * VCD file initialization
170 * This will allow you to create a "wave" file and display it in gtkwave
171 * Pressing "r" and "s" during the demo will start and stop recording
174 avr_vcd_init(avr, "gtkwave_output.vcd", &vcd_file, 1000 /* usec */);
175 avr_vcd_add_signal(&vcd_file,
176 avr_io_getirq(avr, AVR_IOCTL_IOPORT_GETIRQ('B'), IOPORT_IRQ_PIN_ALL), 8 /* bits */ ,
178 avr_vcd_add_signal(&vcd_file,
179 button.irq + IRQ_BUTTON_OUT, 1 /* bits */ ,
182 // 'raise' it, it's a "pullup"
183 avr_raise_irq(button.irq + IRQ_BUTTON_OUT, 1);
185 printf( "Demo launching: 'LED' bar is PORTB, updated every 1/64s by the AVR\n"
186 " firmware using a timer. If you press 'space' this presses a virtual\n"
187 " 'button' that is hooked to the virtual PORTC pin 0 and will\n"
188 " trigger a 'pin change interrupt' in the AVR core, and will 'invert'\n"
190 " Press 'q' to quit\n\n"
191 " Press 'r' to start recording a 'wave' file\n"
192 " Press 's' to stop recording\n"
196 * OpenGL init, can be ignored
198 glutInit(&argc, argv); /* initialize GLUT system */
200 glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE);
201 glutInitWindowSize(8 * pixsize, 1 * pixsize); /* width=400pixels height=500pixels */
202 window = glutCreateWindow("Glut"); /* create window */
204 // Set up projection matrix
205 glMatrixMode(GL_PROJECTION); // Select projection matrix
206 glLoadIdentity(); // Start with an identity matrix
207 glOrtho(0, 8 * pixsize, 0, 1 * pixsize, 0, 10);
209 glTranslatef(0, -1 * pixsize, 0);
211 glutDisplayFunc(displayCB); /* set window's display callback */
212 glutKeyboardFunc(keyCB); /* set window's key callback */
213 glutTimerFunc(1000 / 24, timerCB, 0);
215 // the AVR run on it's own thread. it even allows for debugging!
217 pthread_create(&run, NULL, avr_run_thread, NULL);