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/*
* Author: Alexander Komarov <alexander.komarov@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <iostream>
#include <string>
#include <stdexcept>
#include <unistd.h>
#include <stdlib.h>
#include <functional>
#include <string.h>
#include "lol.h"
using namespace upm;
static mraa_gpio_context *m_Ctx;
static unsigned char *buffer;
static mraa_gpio_context c1, c2, c3, c4;
static int charlie_pairs [12][22] = {
{3,124, 4,110, 5,96, 6,82, 7,68, 8,54, 9,40, 10,26, 11,12, -1,-1, -1,-1},
{3,122, 4,108, 5,94, 6,80, 7,66, 8,52, 9,38, 10,24, 11,10, -1,-1, -1,-1},
{3,120, 4,106, 5,92, 6,78, 7,64, 8,50, 9,36, 10,22, 11,8, -1,-1, -1,-1},
{0,125, 1,123, 2,121, 4,98, 5,84, 6,70, 7,56, 8,42, 9,28, 10,14, 11,0},
{0,111, 1,109, 2,107, 3,112, 5,85, 6,71, 7,57, 8,43, 9,29, 10,15, 11,1},
{0,97, 1,95, 2,93, 3,113, 4,99, 6,72, 7,58, 8,44, 9,30, 10,16, 11,2},
{0,83, 1,81, 2,79, 3,114, 4,100,5,86, 7,59, 8,45, 9,31, 10,17, 11,3},
{0,69, 1,67, 2,65, 3,115, 4,101,5,87, 6,73, 8,46, 9,32, 10,18, 11,4},
{0,55, 1,53, 2,51, 3,116, 4,102,5,88, 6,74, 7,60, 9,33, 10,19, 11,5},
{0,41, 1,39, 2,37, 3,117, 4,103,5,89, 6,75, 7,61, 8,47, 10,20, 11,6},
{0,27, 1,25, 2,23, 3,118, 4,104,5,90, 6,76, 7,62, 8,48, 9,34, 11,7},
{0,13, 1,11, 2,9, 3,119, 4,105,5,91, 6,77, 7,63, 8,49, 9,35, 10,21}
};
void clear_gpio(int gpio)
{
mraa_gpio_mode(m_Ctx[gpio], MRAA_GPIO_HIZ);
mraa_gpio_dir(m_Ctx[gpio], MRAA_GPIO_IN);
}
void clear_prev_cycle(int cycle)
{
int i;
// What is prev cycle?
cycle--;
if (cycle == -1)
cycle = 11;
// Disable all "1"'s
for (i = 0; i < 11; i++) {
if (charlie_pairs[cycle][i*2] == -1)
break;
if(buffer[charlie_pairs[cycle][i*2 + 1]])
clear_gpio(charlie_pairs[cycle][i*2]);
}
// Disable "0"
clear_gpio(cycle);
}
void set_strong_one(int gpio)
{
mraa_gpio_dir(m_Ctx[gpio], MRAA_GPIO_OUT);
mraa_gpio_mode(m_Ctx[gpio], MRAA_GPIO_STRONG);
mraa_gpio_write(m_Ctx[gpio], 1);
}
void set_strong_zero(int gpio)
{
mraa_gpio_dir(m_Ctx[gpio], MRAA_GPIO_OUT);
mraa_gpio_mode(m_Ctx[gpio], MRAA_GPIO_STRONG);
mraa_gpio_write(m_Ctx[gpio], 0);
}
static void clear_gpios()
{
int i;
for (i = 0; i < 12; i++)
clear_gpio(i);
}
void *do_draw(void *arg)
{
clear_gpios();
while (1) {
int i, cur;
uint8_t cycle = 0;
// 12 Cycles of Matrix
for (cycle = 0; cycle < 12; cycle++)
{
if (cycle == 12) cycle = 0;
clear_prev_cycle(cycle);
// set strong/0 on current cycle line
set_strong_zero(cycle);
// draw ones from framebuffer
for (i = 0; i < 11; i++) {
cur = charlie_pairs[cycle][i*2];
if (cur == -1) break;
if (buffer[charlie_pairs[cycle][i*2 + 1]]) {
set_strong_one(cur);
// printf("cycle %d %d %d %d\n", cycle, i, charlie_pairs[cycle][i*2 + 1],
// buffer[charlie_pairs[cycle][i*2 + 1]]);
}
}
}
}
}
LoL::LoL() {
int i = 0;
mraa_result_t error;
for (i = 0; i < 12; i++)
{
if ( !(m_LoLCtx[i] = mraa_gpio_init(i+2)) )
{
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_gpio_init() failed, invalid pin?");
return;
}
}
memset(framebuffer, 0, LOL_X*LOL_Y);
// I am optimistic and stupid - thread creation
// always works in my world
buffer = (unsigned char*)framebuffer;
m_Ctx = m_LoLCtx;
pthread_create (&drawer_thread, NULL, do_draw, NULL);
}
LoL::~LoL() {
int i = 0;
mraa_result_t error;
for (i = 0; i < 12; i++)
mraa_gpio_close(m_LoLCtx[i]);
}
unsigned char* LoL::getFramebuffer() {
return framebuffer;
}
void LoL::setPixel(int x, int y, bool pixel)
{
if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y)
throw std::invalid_argument(std::string(__FUNCTION__) +
": pixel coordinates out of bounds");
framebuffer[x + LOL_X*y] = (pixel) ? 1 : 0;
return;
}
bool LoL::getPixel(int x, int y)
{
if (x < 0 || y < 0 || x >= LOL_X || y >= LOL_Y)
throw std::invalid_argument(std::string(__FUNCTION__) +
": pixel coordinates out of bounds");
return (framebuffer[x + LOL_X*y] == 0) ? false : true;
}
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