107 lines
3 KiB
C
107 lines
3 KiB
C
/*
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* økoyono MiniLEDCube
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*
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* By Kai Lauterbach (klaute at web dot de) 11/2011
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*
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* Based on http://mosfetkiller.de/?s=miniledcube
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*
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* License: General Public License (GPL v3)
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*
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*/
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#include "main.h"
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/*! \brief Initialize the AVR.
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*/
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static inline void init(void)
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{
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// Init ports
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DDRB = 0xFF; // PB0-PB7: LED 1-8 (Kathode)
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PORTB = 0xFF; // HIGH
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DDRD = 0x78; // PD6: LED 9 (Kathode); PD5-PD3: A-C (Anode)
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PORTD = 0x40;
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// Setup Timer-Interrupt "TIMER1" compare match
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// Refresh-rate is 100Hz of the whole LEDCube.
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// The timer fires at 300Hz.
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// Set the compare value to
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// 625d = 0x271
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OCR1A = 0x271;
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// Set prescaler to 64 and CTC mode
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TCCR1B = (1 << CS11) | (1 << CS10) | (1 << WGM12);
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sei(); // Enable interrupts global
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}
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/*! \brief Main loop
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*/
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int __attribute__((OS_main)) main()
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{
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uint8_t level = 0x00;
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uint8_t frmnum = 0x00;
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uint8_t delay = 0x00;
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// Initialize the AVR and the USB connection.
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init();
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init_usb();
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// main loop
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for (;;) {
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usbPoll(); // keep connected
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if (TIFR & (1 << OCF1A)) {
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TIFR = (1 << OCF1A);
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cli();
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if (!(--delay)) { // decrease the counter and check if we are done with waiting
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if (frmnum == MAX_EEPROM_FRAMES) {
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if (mode == MODE_ANIMATION_SINGLE) {
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mode = MODE_ANIMATION_STOP; // stop the animation after we have reached the 31th frame
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}
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frmnum = 0; // always start at the first frame
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} else {
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if (mode) {
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// if we are in an animation mode we have to load a frame out of the eeprom
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// and increase the counter
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frame.all = eeprom_read_dword(&eep_anim[frmnum]);
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frmnum++;
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}
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}
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// Just shift right by 24 instead of 27 to multiply the delay by 8.
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// Possible delays are 8 16 24 32 and so on. A zero delay isn't possible.
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// Zero means that a delay of 255 happens because the delay variable was decreased first before testing
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// it's zero value.
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delay = frame.bytes[3] & 0xf8;
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}
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// PORTD = __, 9, C, B, A, D+, D-, __
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PORTD &= ~((1 << PORTD5) | (1 << PORTD4) | (1 << PORTD3) | (1 << PORTD2)); // delete bit 3 to 6 (bit 3 to 5 = layer 0 to 2
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// PORTB = 1..8
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uint32_t tmp_frame = (frame.all >> (uint8_t)(level * 9));
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// 0 = led is on, 1 = led is off
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PORTB = ~((uint8_t)tmp_frame);
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if (!(tmp_frame & 0x100)) {
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PORTD |= (1 << PORTD6); // turn the 9th LED off
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} else {
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PORTD &= ~(1 << PORTD6); // turn the 9th LED on
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}
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// set the current level to high
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// at this point the LED pins are up to date so it's
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// safe to re-enable the level wire (A/B/C)
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// this prevents weird LED flashing which is not defined
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// in the animation frame
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PORTD |= ((1 << level) << 3); // set the current level
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// rotate through the 3 level
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level++;
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if (level > 2) {
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level = 0;
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}
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sei();
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}
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}
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}
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