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main.c
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main.c
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/*
* main.c
*
* Copyright (c) 2014 Jeremy Garff <jer @ jers.net>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted
* provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
* 3. Neither the name of the owner nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <signal.h>
#include "board_info.h"
#include "clk.h"
#include "gpio.h"
#include "pwm.h"
#include "ws2811.h"
#define ARRAY_SIZE(stuff) (sizeof(stuff) / sizeof(stuff[0]))
#define TARGET_FREQ WS2811_TARGET_FREQ
#define GPIO_PIN 18
// jimbotel: Note: we should avoid DMA channel 5 on raspberry pi according to https://github.com/beyondscreen/node-rpi-ws281x-native/issues/90#61
// jimbotel: pigpio module defines PI_DEFAULT_DMA_PRIMARY_CHANNEL = 14 for the Pi3 and below (7 for the Pi4), and PI_DEFAULT_DMA_SECONDARY_CHANNEL = 6 in all cases.
#define DMA 5
#define WIDTH 3
#define HEIGHT 3
#define LED_COUNT (WIDTH * HEIGHT)
ws2811_t ledstring =
{
.freq = TARGET_FREQ,
.dmanum = DMA,
.channel =
{
[0] =
{
.gpionum = GPIO_PIN,
.count = LED_COUNT,
.invert = 0,
.brightness = 255,
},
[1] =
{
.gpionum = 0,
.count = 0,
.invert = 0,
.brightness = 0,
},
},
};
ws2811_led_t matrix[WIDTH][HEIGHT];
void matrix_render(void)
{
int x, y;
for (x = 0; x < WIDTH; x++)
{
for (y = 0; y < HEIGHT; y++)
{
ledstring.channel[0].leds[(y * WIDTH) + x] = matrix[x][y];
}
}
}
void matrix_raise(void)
{
int x, y;
for (y = 0; y < (HEIGHT - 1); y++)
{
for (x = 0; x < WIDTH; x++)
{
matrix[x][y] = matrix[x][y + 1];
}
}
}
int dotspos[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
ws2811_led_t dotcolors[] =
{
0x200000, // red
0x202000, // yellow
0x002020, // lightblue
0x200010, // pink
0x002000, // green
0x100010, // purple
0x000020, // blue
0x201000, // orange
};
void matrix_bottom(void)
{
int i;
static int x = 0;
for (i = 0; i < WIDTH; i++)
{
matrix[i][HEIGHT - 1] = dotcolors[x & 7];
}
x++;
}
static void ctrl_c_handler(int signum)
{
ws2811_fini(&ledstring);
}
static void setup_handlers(void)
{
struct sigaction sa =
{
.sa_handler = ctrl_c_handler,
};
sigaction(SIGKILL, &sa, NULL);
}
int main(int argc, char *argv[])
{
int ret = 0;
if (board_info_init() < 0)
{
return -1;
}
setup_handlers();
if (ws2811_init(&ledstring))
{
return -1;
}
if (0)
{
void *p = malloc(32000000);
memset(p, 42, 32000000);
free(p);
}
while (1)
{
matrix_raise();
matrix_bottom();
if (0)
{
void *p = malloc(64000000);
memset(p, 42, 64000000);
free(p);
}
matrix_render();
if (ws2811_render(&ledstring))
{
ret = -1;
break;
}
// 15 frames /sec
usleep(500000);
}
ws2811_fini(&ledstring);
return ret;
}