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106</pre></div></td><td class="code"><div class="highlight"><pre><span class="cm">/*</span>
<span class="cm"> * This file is part of the libopencm3 project.</span>
<span class="cm"> *</span>
<span class="cm"> * Copyright (C) 2009 Uwe Hermann <uwe@hermann-uwe.de></span>
<span class="cm"> *</span>
<span class="cm"> * This library is free software: you can redistribute it and/or modify</span>
<span class="cm"> * it under the terms of the GNU Lesser General Public License as published by</span>
<span class="cm"> * the Free Software Foundation, either version 3 of the License, or</span>
<span class="cm"> * (at your option) any later version.</span>
<span class="cm"> *</span>
<span class="cm"> * This library is distributed in the hope that it will be useful,</span>
<span class="cm"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<span class="cm"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span>
<span class="cm"> * GNU Lesser General Public License for more details.</span>
<span class="cm"> *</span>
<span class="cm"> * You should have received a copy of the GNU Lesser General Public License</span>
<span class="cm"> * along with this library. If not, see <http://www.gnu.org/licenses/>.</span>
<span class="cm"> */</span>
<span class="cp">#include <libopencm3/stm32/rcc.h></span>
<span class="cp">#include <libopencm3/stm32/gpio.h></span>
<span class="cp">#include <libopencm3/stm32/usart.h></span>
<span class="cp">#include <libopencm3/stm32/timer.h></span>
<span class="c1">//Here we import some python stuff for the python precompiler</span>
<span class="cp">#python from stonerlights import *</span>
<span class="cp">#python import math</span>
<span class="c1">//Bind a few python functions</span>
<span class="cp">#pyfunc gamma_correction_LUT</span>
<span class="cp">#pyfunc Pin_Setup</span>
<span class="cp">#pyfunc init_pins</span>
<span class="cp">#pyfunc PWM_Setup</span>
<span class="k">const</span> <span class="kt">uint32_t</span> <span class="n">R_comp</span> <span class="o">=</span> <span class="mi">4096</span><span class="p">;</span>
<span class="k">const</span> <span class="kt">uint32_t</span> <span class="n">G_comp</span> <span class="o">=</span> <span class="mi">2949</span><span class="p">;</span>
<span class="k">const</span> <span class="kt">uint32_t</span> <span class="n">B_comp</span> <span class="o">=</span> <span class="mi">3072</span><span class="p">;</span>
<span class="n">gamma_correction_LUT</span><span class="p">(</span><span class="s">"LUT_gamma"</span><span class="p">,</span> <span class="n">math</span><span class="p">.</span><span class="n">e</span><span class="p">,</span> <span class="mi">4096</span><span class="p">,</span> <span class="mi">4095</span><span class="p">);</span> <span class="c1">//Create a 12 bit by 12 bit LUT for gamma e (2.7)</span>
<span class="n">Pin_Setup</span><span class="p">(</span> <span class="p">(</span><span class="n">PA0</span><span class="p">,</span> <span class="n">PB8</span><span class="p">,</span> <span class="n">PB9</span><span class="p">),</span> <span class="n">MODE</span><span class="p">.</span><span class="n">AF_PP</span><span class="p">,</span> <span class="n">BANDWIDTH</span><span class="p">.</span><span class="n">MAX</span> <span class="p">);</span> <span class="c1">//Setup pins for alternate function push-pull output</span>
<span class="k">static</span> <span class="kt">void</span> <span class="nf">clock_setup</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
<span class="p">{</span>
<span class="n">rcc_clock_setup_in_hsi_out_24mhz</span><span class="p">();</span>
<span class="cm">/* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */</span>
<span class="n">rcc_periph_clock_enable</span><span class="p">(</span><span class="n">RCC_GPIOA</span><span class="p">);</span>
<span class="n">rcc_periph_clock_enable</span><span class="p">(</span><span class="n">RCC_GPIOB</span><span class="p">);</span>
<span class="n">rcc_periph_clock_enable</span><span class="p">(</span><span class="n">RCC_USART1</span><span class="p">);</span>
<span class="n">rcc_periph_clock_enable</span><span class="p">(</span><span class="n">RCC_TIM2</span><span class="p">);</span>
<span class="n">rcc_periph_clock_enable</span><span class="p">(</span><span class="n">RCC_TIM4</span><span class="p">);</span>
<span class="n">PWM_Setup</span><span class="p">(</span><span class="n">TIM2</span><span class="p">,</span> <span class="mi">4096</span><span class="p">,</span> <span class="n">OC1</span><span class="p">);</span> <span class="c1">//Initialize timers and PWM channels</span>
<span class="n">PWM_Setup</span><span class="p">(</span><span class="n">TIM4</span><span class="p">,</span> <span class="mi">4096</span><span class="p">,</span> <span class="p">(</span><span class="n">OC3</span><span class="p">,</span> <span class="n">OC4</span><span class="p">));</span>
<span class="p">}</span>
<span class="kr">inline</span> <span class="kt">void</span> <span class="nf">colorHexagon</span><span class="p">(</span><span class="kt">int</span> <span class="n">hue</span><span class="p">,</span> <span class="kt">int</span> <span class="o">*</span><span class="n">R</span><span class="p">,</span> <span class="kt">int</span> <span class="o">*</span><span class="n">G</span><span class="p">,</span> <span class="kt">int</span> <span class="o">*</span><span class="n">B</span><span class="p">)</span> <span class="p">{</span>
<span class="kt">int</span> <span class="n">frac</span> <span class="o">=</span> <span class="n">hue</span> <span class="o">>></span> <span class="mi">12</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">ci</span> <span class="o">=</span> <span class="n">hue</span> <span class="o">&</span> <span class="mh">0xFFF</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">cd</span> <span class="o">=</span> <span class="mi">4095</span> <span class="o">-</span> <span class="n">ci</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">cs</span> <span class="o">=</span> <span class="mi">4095</span><span class="p">;</span>
<span class="k">switch</span> <span class="p">(</span><span class="n">frac</span><span class="p">)</span> <span class="p">{</span>
<span class="k">case</span> <span class="mi">0</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="n">ci</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R1 G+ B0</span>
<span class="k">case</span> <span class="mi">1</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="n">cd</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R- G1 B0</span>
<span class="k">case</span> <span class="mi">2</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="n">ci</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R0 G1 B+</span>
<span class="k">case</span> <span class="mi">3</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="n">cd</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R0 G- B1</span>
<span class="k">case</span> <span class="mi">4</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="n">ci</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R+ G0 B1</span>
<span class="k">case</span> <span class="mi">5</span>: <span class="o">*</span><span class="n">R</span> <span class="o">=</span> <span class="n">cs</span><span class="p">;</span> <span class="o">*</span><span class="n">G</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span> <span class="o">*</span><span class="n">B</span> <span class="o">=</span> <span class="n">cd</span><span class="p">;</span> <span class="k">break</span><span class="p">;</span> <span class="c1">//R1 G0 B-</span>
<span class="p">}</span>
<span class="p">}</span>
<span class="kt">int</span> <span class="nf">main</span><span class="p">(</span><span class="kt">void</span><span class="p">)</span>
<span class="p">{</span>
<span class="kt">int</span> <span class="n">counter</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span>
<span class="kt">int</span> <span class="n">i</span><span class="p">,</span> <span class="n">j</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="n">c</span> <span class="o">=</span> <span class="mi">0</span><span class="p">;</span>
<span class="n">clock_setup</span><span class="p">();</span>
<span class="n">init_pins</span><span class="p">();</span>
<span class="n">usart_setup</span><span class="p">();</span>
<span class="k">while</span> <span class="p">(</span><span class="mi">1</span><span class="p">)</span> <span class="p">{</span>
<span class="n">counter</span><span class="o">=</span><span class="p">(</span><span class="n">counter</span><span class="o">+</span><span class="mi">1</span><span class="p">)</span> <span class="o">%</span> <span class="p">(</span><span class="mi">4096</span><span class="o">*</span><span class="mi">6</span><span class="p">);</span>
<span class="kt">int</span> <span class="n">R</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">G</span><span class="o">=</span><span class="mi">0</span><span class="p">,</span> <span class="n">B</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span>
<span class="n">colorHexagon</span> <span class="p">(</span><span class="n">counter</span><span class="p">,</span> <span class="o">&</span><span class="n">R</span><span class="p">,</span> <span class="o">&</span><span class="n">G</span><span class="p">,</span> <span class="o">&</span><span class="n">B</span><span class="p">);</span>
<span class="n">TIM4_CCR3</span> <span class="o">=</span> <span class="n">LUT_gamma</span><span class="p">[((</span><span class="kt">uint32_t</span><span class="p">)</span><span class="n">R</span> <span class="o">*</span> <span class="n">R_comp</span><span class="p">)</span> <span class="o">>></span> <span class="mi">12</span><span class="p">];</span>
<span class="n">TIM2_CCR1</span> <span class="o">=</span> <span class="n">LUT_gamma</span><span class="p">[((</span><span class="kt">uint32_t</span><span class="p">)</span><span class="n">G</span> <span class="o">*</span> <span class="n">G_comp</span><span class="p">)</span> <span class="o">>></span> <span class="mi">12</span><span class="p">];</span>
<span class="n">TIM4_CCR4</span> <span class="o">=</span> <span class="n">LUT_gamma</span><span class="p">[((</span><span class="kt">uint32_t</span><span class="p">)</span><span class="n">B</span> <span class="o">*</span> <span class="n">B_comp</span><span class="p">)</span> <span class="o">>></span> <span class="mi">12</span><span class="p">];</span>
<span class="k">for</span> <span class="p">(</span><span class="k">volatile</span> <span class="kt">int</span> <span class="n">i</span><span class="o">=</span><span class="mi">0</span><span class="p">;</span><span class="n">i</span><span class="o">!=</span><span class="mi">100</span><span class="p">;</span><span class="n">i</span><span class="o">++</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="mi">0</span><span class="p">;</span>
<span class="p">}</span>
</pre></div>
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