add derfmap -> 8x32 WS2812B matrix app

loop ?= 1

arch_drivers += ,stdin,neopixel

#include "arch.h"

#include "driver/neopixel.h"

#include "driver/stdin.h"

#include "driver/stdout.h"

#include <util/delay.h>

#include <avr/io.h>

#include <avr/interrupt.h>

#include <avr/wdt.h>

#define CLOCK_LO ( ( PIND & _BV(PD3) ) != 0 )

#define CLOCK_HI ( ( PIND & _BV(PD3) ) == 0 )

#define DATA_LO ( ( PIND & _BV(PD2) ) != 0 )

#define DATA_HI ( ( PIND & _BV(PD2) ) == 0 )

#define DATA_BIT ( ( ~PIND & _BV(PD2) ) >> PD2 )

#define BUF_SIZE 36

#define BUF_MAX ((BUF_SIZE)-1)

#define NUM_PIXELS 256

Adafruit_NeoPixel np(NUM_PIXELS, GPIO::pb0, NEO_GRB+NEO_KHZ800);

#define MYADDRESS (0x0006)

volatile uint16_t address;

volatile uint8_t buf[BUF_SIZE];

volatile uint8_t done;

void update()

{

	if (buf[35] > 100) {

		buf[35] = 100;

	}

	if (buf[32] + buf[33] + buf[34] > 50) {

		buf[32] = 0;

		buf[33] = 0;

		buf[34] = 5;

	}

	uint32_t color = np.Color(buf[34], buf[33], buf[32]);

	uint8_t rgb = buf[35];

	for (uint8_t col = 0; col < 32; col++) {

		for (uint8_t row = 0; row < 8; row++) {

			uint8_t pixel_index = col*8;

			if (col % 2) {

				pixel_index += 7 - row;

			} else {

				pixel_index += row;

			}

			if (rgb) {

				color = np.gamma32(np.ColorHSV(((uint16_t)col*8+row) * 255, 255, rgb));

			}

			if (buf[col] & _BV(row)) {

				np.setPixelColor(pixel_index, color);

			} else {

				np.setPixelColor(pixel_index, 0);

			}

		}

	}

	np.show();

}

int main(void)

{

	arch.setup();

	gpio.setup();

	kout.setup();

	kin.setup();

	np.setup();

	PORTD = _BV(PD2) | _BV(PD3);

	EICRA = _BV(ISC10);

	EIMSK = _BV(INT1);

	np.setPixelColor(0, np.Color(0, 1, 1));

	np.setPixelColor(7, np.Color(0, 1, 1));

	np.setPixelColor(248, np.Color(0, 1, 1));

	np.setPixelColor(255, np.Color(0, 1, 1));

	np.show();

	while (1) {

		arch.idle();

		if (done) {

			update();

			done = 0;

		}

	}

	return 0;

}

ISR(INT1_vect)

{

	if (CLOCK_HI) {

		for (uint8_t i = BUF_MAX; i > 0; i--) {

			buf[i] = (buf[i] << 1) | (buf[i-1] >> 7);

		}

		buf[0] = (buf[0] << 1) | (address >> 15);

		address = (address << 1) | DATA_BIT;

		if (DATA_BIT) {

			gpio.led_on(0);

		} else {

			gpio.led_off(0);

		}

	}

	else if (DATA_HI && (address == MYADDRESS)) {

		done = 1;

	}

}