add ssd1306 bad apple skeleton

# Copyright 2020 Daniel Friesel

#

# SPDX-License-Identifier: CC0-1.0

prompt "SSD1306 Bad Apple"

depends on driver_ssd1306 && !wakeup

# vim:ft=make

#

# Copyright 2020 Daniel Friesel

#

# SPDX-License-Identifier: CC0-1.0

ifdef app

	override arch_drivers += i2c,timer

	CONFIG_driver_ssd1306 = y

	CONFIG_driver_ssd1306_width = 128

	CONFIG_driver_ssd1306_height = 64

	CONFIG_lib_inflate = y

	CONFIG_lib_inflate_lut = y

	CONFIG_arch_msp430fr5994lp_large_mode = y

endif

#!/bin/sh

# ./convert.sh <file> -r <frame rate> [additional ffmpeg args]

set -eu

mkdir -p tmp

ffmpeg -i "$@" tmp/frame%4d.png

parallel mogrify -resize 128x64 -threshold 50% -- tmp/*.png

echo "const unsigned char frame_rate = $3;" > frames.cc

./frames-to-cc tmp/*.png >> frames.cc

rm -rf tmp

#!/usr/bin/env python3

from PIL import Image

import sys

import zlib

buf_w = 128

buf_h = 64

def load_image(filename):

    im = Image.open(filename)

    w, h = im.size

    buf = [0 for i in range(buf_w * buf_h // 8)]

    for y in range(min(h, buf_h)):

        for x in range(min(w, buf_w)):

            if im.getpixel((x, y)):

                buf[(y // 8) * buf_w + x] |= 1 << (y % 8)

    return buf

for i in range(1, len(sys.argv) - 2, 3):

    buf = (

        load_image(sys.argv[i])

        + load_image(sys.argv[i + 1])

        + load_image(sys.argv[i + 2])

    )

    c_buf = ",".join(map(str, buf))

    z_buf = zlib.compress(bytes(buf), 9)

    z_buf = z_buf[2:-4]

    out_buf = ",".join(map(str, z_buf))

    print(

        f'__attribute__((section(".text"))) unsigned char const frame{i:04d}[] = {{ {out_buf} }};'

    )

frames = list()

for i in range(1, len(sys.argv) - 2, 3):

    frames.append(f"(unsigned char*)frame{i:04d}")

prefix = "unsigned char* const frames[] = {"

postfix = "};"

print(prefix + ", ".join(frames) + postfix)

/*

 * Copyright 2020 Daniel Friesel

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#include "arch.h"

#include "driver/gpio.h"

#include "driver/stdout.h"

#include "driver/i2c.h"

#include "driver/ssd1306.h"

#include "lib/inflate.h"

#include "driver/timer.h"

volatile unsigned char timer_done = 0;

#include "frames.cc"

__attribute__((section(".leaRAM"))) unsigned char img_buf[(128 * 64 / 8) * 3];

int main(void)

{

	unsigned int i = 0;

	unsigned char line;

	arch.setup();

	gpio.setup();

	kout.setup();

	i2c.setup();

	ssd1306.init();

	timer.setup_hz_low(frame_rate);

	while (1) {

		for (i = 0; i < (sizeof(frames) / sizeof(frames[0])); i++) {

			timer_done = 0;

			timer.start(1);

			ssd1306.showImage(img_buf + (128 * 64 / 8 * 2), 128 * 64 / 8);

			inflate(frames[i], sizeof(img_buf), img_buf, sizeof(img_buf));

			while (!timer_done) {

				arch.idle();

			}

			timer.stop();

			timer_done = 0;

			timer.start(1);

			ssd1306.showImage(img_buf + (128 * 64 / 8 * 0), 128 * 64 / 8);

			while (!timer_done) {

				arch.idle();

			}

			timer.stop();

			timer_done = 0;

			timer.start(1);

			ssd1306.showImage(img_buf + (128 * 64 / 8 * 1), 128 * 64 / 8);

			while (!timer_done) {

				arch.idle();

			}

			timer.stop();

		}

	}

	return 0;

}

ON_TIMER_INTERRUPT_head

	timer_done = 1;

ON_TIMER_INTERRUPT_tail