Migrating repo.

firmware/main.c

@@ -0,0 +1,62 @@
+/*
+www.electropepper.org
+
+Beerright 2017.
+
+*/
+
+#include "main.h"
+
+#define diceDelay 100		// LED speed change while shuffling
+#define toggleDelay 300		// LED speed when stoped
+#define none 0
+
+
+int main(int argc, char **argv)
+{
+	GIMSK |= _BV(PCIE);						// Enable pin change interrupt
+	PCMSK |= _BV(PB4);						// Enable PORTB4 for pin change interrupt
+	sei();									// Enable global interrupts
+	DDRB &= ~_BV(PB4);						// Set PORTB4 to input
+	set_sleep_mode(SLEEP_MODE_PWR_DOWN);	// Set sleep mode for Power-down(see datasheet)
+
+
+	uint8_t randSeed = eeprom_read_byte ((uint8_t*)1);	// Reads eeprom byte 1, value
+														// into variable randSeed
+	++randSeed;											// Increments it
+	eeprom_write_byte ((uint8_t*)1, randSeed);			// Writes value back into
+														// eeprom byte 1
+	srand (randSeed);									// Creates seed for random number
+														// generator from randSeed value
+
+
+	while (1) {
+		for (stand_cycle = 0; stand_cycle < 40; stand_cycle++){	// Repeats 40 times	next 4 lines
+			what_led(cur_led);									// Turn ON LED number inside variable cur_led
+			_delay_ms(toggleDelay);								// Wait
+			what_led(none);										// Truen off all LED's
+			_delay_ms(toggleDelay);								// Wait
+		}
+	sleep_mode();					// Go into sleep mode to save power, will came back alive
+									// after interrupt is generated
+	}
+}
+
+ISR(PCINT0_vect)						// Interrupt routine on pin change
+{
+	for (uint8_t i = 0; i < 25; i++){	// Repeats 25 times	next 3 lines
+		cur_led = ((rand() % 7) + 1);	// Creates random integer from 0 to 6 into cur_led
+		what_led(cur_led);				// Turn ON LED number inside variable cur_led
+		_delay_ms(diceDelay);			// Wait
+	}
+	stand_cycle = 0;					// Resets the standby blinking times
+}
+
+
+void what_led(uint8_t led)
+{
+	int8_t ledN = led_table[led];		// Reads led_table given number(led) into ledN
+	DDRB = ledN & 0x0F;					// Copy first ledN nibble into DDRB
+	ledN = (ledN & 0xF0) >> 4;			// Move second nibble into first nibble
+	PORTB = ledN & 0x0F;				// Copy first ledN nibble into PORTB
+}