Commit 168ea4b5 authored by Daniel Friesel's avatar Daniel Friesel
Browse files

add ssd1306 bad apple skeleton

parent b650f2ac
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# Copyright 2020 Daniel Friesel
#
# SPDX-License-Identifier: CC0-1.0

prompt "SSD1306 Bad Apple"
depends on driver_ssd1306 && !wakeup
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# 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
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#!/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
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#!/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)
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/*
 * 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