jchillerup.c

#include <util/delay.h>
#include <arduino/pins.h>
#include <arduino/serial.h>

#define LATCH 4
#define CLOCK 3
#define DATA  2
#define OE 8
#define RESET 9

#define MAX 255
#define MAX_R 50
#define MAX_G 100
#define MAX_B 100

#include "serial.c"

static uint8_t leds[48] = {
	0,   0,   0,   
	0,   0,   0,   
	0,   0,   0,   
	0,   0,   0, 
	0,   0,   0,  
	0,   0,   0,
	0,   0,   0,   
	0,   0,   0,
	0,   0,   0,  
	0,   0,   0,   
	0,   0,   0,   
	0,   0,   0, 
	0,   0,   0,   
	0,   0,   0,   
	0,   0,   0,   
	0,   0,   0
};

static uint8_t ledmask[] = {
	1,   1,   1,   1,   1,   1,   1,   1,
	1,   1,   1,   1,   1,   1,   1,   1,
	1,   1,   1,   1,   1,   1,   1,   1,
	1,   1,   1,   1,   1,   1,   1,   1,
	1,   1,   1,   1,   1,   1,   1,   1,
	1,   1,   1,   1,   1,   1,   1,   1
};

static void
shiftout(uint8_t v1, uint8_t v2, uint8_t v3,
         uint8_t v4, uint8_t v5, uint8_t v6)
{
	uint8_t mask;
	pin_low(LATCH);

	for (mask = 1; mask; mask <<= 1) {
		if (v1 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	for (mask = 1; mask; mask <<= 1) {
		if (v2 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	for (mask = 1; mask; mask <<= 1) {
		if (v3 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	for (mask = 1; mask; mask <<= 1) {
		if (v4 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	for (mask = 1; mask; mask <<= 1) {
		if (v5 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	for (mask = 1; mask; mask <<= 1) {
		if (v6 & mask)
			pin_high(DATA);
		else
			pin_low(DATA);
		pin_high(CLOCK);
		pin_low(CLOCK);
	}

	pin_high(LATCH);
}

static void
pwm() {
	uint8_t i;
	uint8_t v1 = 0xFF;
	uint8_t v2 = 0xFF;
	uint8_t v3 = 0xFF;
	uint8_t v4 = 0xFF;
	uint8_t v5 = 0xFF;
	uint8_t v6 = 0xFF;

	for (i = 0; i < MAX; i++) {
		uint8_t mask;
		uint8_t j = 0;

		for (mask = 1; mask; mask <<= 1) {
			if (i == leds[j])
				v1 &= ~mask;
			if (i == leds[j+8])
				v2 &= ~mask;
			if (i == leds[j+16])
				v3 &= ~mask;
			if (i == leds[j+24])
				v4 &= ~mask;
			if (i == leds[j+32])
				v5 &= ~mask;
			if (i == leds[j+40])
				v6 &= ~mask;

			j++;
		}

		shiftout(v1, v2, v3, v4, v5, v6);
	} 
}

int __attribute__((noreturn))
main()
{
	uint8_t i;

	/* initialize serial communication */
	serial_init(9600, 8n1);

	pin_mode_output(LATCH);
	pin_mode_output(CLOCK);
	pin_mode_output(DATA);
	pin_mode_output(OE);
	pin_mode_output(RESET);

	pin_high(LATCH);
	pin_low(CLOCK);
	pin_high(DATA);
	pin_low(OE);
	pin_high(RESET);


	for(i = 2; i < 48; i += 3) {
		leds[i-1] = 200;
		/*
		leds[i-2] = 50;
		leds[i-2] = 35;
		*/
	}

	/* enable interrupts */
	sei();

	while (1) {
		while (serial_available()) {
			uint8_t c = serial_getchar();

			if (c == '7')
				serial_print("lol\n");
		}

		pwm();
	}
}