61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
/*
|
|
|
|
Cross-fading Cylon Eyes
|
|
A PWM demo
|
|
|
|
*/
|
|
|
|
// ------- Preamble -------- //
|
|
#include <avr/io.h> /* Defines pins, ports, etc */
|
|
#include <util/delay.h> /* Functions to waste time */
|
|
#include "pinDefines.h"
|
|
|
|
|
|
int main(void) {
|
|
|
|
uint8_t thisEye = 0;
|
|
uint8_t nextEye = 1;
|
|
uint8_t brightness = 0;
|
|
int8_t direction = 1;
|
|
uint8_t i;
|
|
|
|
// -------- Inits --------- //
|
|
|
|
// Init all LEDs
|
|
LED_DDR = 0xff;
|
|
SPEAKER_DDR |= (1 << SPEAKER);
|
|
// ------ Event loop ------ //
|
|
while (1) {
|
|
|
|
// PWM
|
|
for (brightness = 0; brightness < 255; brightness++) {
|
|
for (i = 0; i < 255; i++) {
|
|
if (i < brightness) {
|
|
LED_PORT &= ~(1 << thisEye); /* dimming */
|
|
LED_PORT |= (1 << nextEye); /* getting brighter */
|
|
}
|
|
else {
|
|
LED_PORT |= (1 << thisEye);
|
|
LED_PORT &= ~(1 << nextEye);
|
|
}
|
|
LED_PORT &= ~(1 << thisEye); /* make sure it's off */
|
|
}
|
|
}
|
|
|
|
// Cylon Scan
|
|
thisEye += direction; /* move on to next eye */
|
|
|
|
if (thisEye == 0) {
|
|
direction = 1;
|
|
}
|
|
if (thisEye == 7) {
|
|
direction = -1;
|
|
}
|
|
|
|
nextEye = thisEye + direction;
|
|
|
|
|
|
} /* End event loop */
|
|
return 0; /* This line is never reached */
|
|
}
|