1 /* 2 * Copyright (c) 2023 Juan Manuel Cruz <jcruz@fi.uba.ar> <jcruz@frba.utn.edu.ar>. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * 3. Neither the name of the copyright holder nor the names of its 16 * contributors may be used to endorse or promote products derived from 17 * this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 22 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 23 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 26 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 * 32 * @file : task_pwm.c 33 * @date : Set 26, 2023 34 * @author : Juan Manuel Cruz <jcruz@fi.uba.ar> <jcruz@frba.utn.edu.ar> 35 * @version v1.0.0 36 */ 37 38 /********************** inclusions *******************************************/ 39 /* Project includes. */ 40 #include <stdlib.h> 41 #include "main.h" 42 43 /* Demo includes. */ 44 #include "logger.h" 45 #include "dwt.h" 46 47 /* Application & Tasks includes. */ 48 #include "board.h" 49 #include "app.h" 50 #include <math.h> 51 52 /********************** macros and definitions *******************************/ 53 54 #define ADC_MAX_VALUE (4096) 55 #define PERIOD (65535) 56 #define min(a, b) a < b ? a : b 57 58 /********************** internal functions declaration ***********************/ 59 void setPWM(TIM_HandleTypeDef timer, 60 uint32_t channel, 61 uint16_t period, 62 uint16_t pulse); 63 64 /********************** external data declaration *****************************/ 65 extern TIM_HandleTypeDef htim3; 66 67 /********************** external functions definition ************************/ 68 void task_pwm_init(void *parameters) 69 { 70 shared_data_type *shared_data = (shared_data_type *) parameters; 71 shared_data->pwm_active = 0; 72 } 73 74 void task_pwm_update(void *parameters) 75 { 76 shared_data_type *data = (shared_data_type *) parameters; 77 if (data->adc_end_of_conversion) 78 { 79 data->adc_end_of_conversion = false; 80 float x = ((float)data->adc_value/ADC_MAX_VALUE); 81 data->pwm_active = PERIOD*(1 - 2*pow(x, 2)); 82 setPWM(htim3, TIM_CHANNEL_1, PERIOD, data->pwm_active); 83 } 84 } 85 86 void setPWM(TIM_HandleTypeDef timer, uint32_t channel, 87 uint16_t period, uint16_t pulse) { 88 HAL_TIM_PWM_Stop(&timer, channel); 89 TIM_OC_InitTypeDef sConfigOC; 90 timer.Init.Period = period; 91 HAL_TIM_PWM_Init(&timer); 92 93 sConfigOC.OCMode = TIM_OCMODE_PWM1; 94 sConfigOC.Pulse = pulse; 95 sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; 96 sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; 97 HAL_TIM_PWM_ConfigChannel(&timer, &sConfigOC, channel); 98 HAL_TIM_PWM_Start(&timer,channel); 99 } 100 101 /********************** end of file ******************************************/
