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mbed-os/targets/TARGET_STM/pwmout_api.c@0:6bf0743ece18, 2020-03-28 (annotated)

Committer:
demayer
Date:
Sat Mar 28 15:28:19 2020 +0000
Revision:
0:6bf0743ece18
IMU Thread with an event-queue running parallel to handle tasks like a 5 times blinking LED. Button with interrupt detected.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
demayer 0:6bf0743ece18 1 /* mbed Microcontroller Library
demayer 0:6bf0743ece18 2 *******************************************************************************
demayer 0:6bf0743ece18 3 * Copyright (c) 2015, STMicroelectronics
demayer 0:6bf0743ece18 4 * All rights reserved.
demayer 0:6bf0743ece18 5 *
demayer 0:6bf0743ece18 6 * Redistribution and use in source and binary forms, with or without
demayer 0:6bf0743ece18 7 * modification, are permitted provided that the following conditions are met:
demayer 0:6bf0743ece18 8 *
demayer 0:6bf0743ece18 9 * 1. Redistributions of source code must retain the above copyright notice,
demayer 0:6bf0743ece18 10 * this list of conditions and the following disclaimer.
demayer 0:6bf0743ece18 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
demayer 0:6bf0743ece18 12 * this list of conditions and the following disclaimer in the documentation
demayer 0:6bf0743ece18 13 * and/or other materials provided with the distribution.
demayer 0:6bf0743ece18 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
demayer 0:6bf0743ece18 15 * may be used to endorse or promote products derived from this software
demayer 0:6bf0743ece18 16 * without specific prior written permission.
demayer 0:6bf0743ece18 17 *
demayer 0:6bf0743ece18 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
demayer 0:6bf0743ece18 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
demayer 0:6bf0743ece18 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
demayer 0:6bf0743ece18 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
demayer 0:6bf0743ece18 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
demayer 0:6bf0743ece18 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
demayer 0:6bf0743ece18 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
demayer 0:6bf0743ece18 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
demayer 0:6bf0743ece18 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
demayer 0:6bf0743ece18 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
demayer 0:6bf0743ece18 28 *******************************************************************************
demayer 0:6bf0743ece18 29 */
demayer 0:6bf0743ece18 30 #include "pwmout_api.h"
demayer 0:6bf0743ece18 31
demayer 0:6bf0743ece18 32 #if DEVICE_PWMOUT
demayer 0:6bf0743ece18 33
demayer 0:6bf0743ece18 34 #include "cmsis.h"
demayer 0:6bf0743ece18 35 #include "pinmap.h"
demayer 0:6bf0743ece18 36 #include "mbed_error.h"
demayer 0:6bf0743ece18 37 #include "PeripheralPins.h"
demayer 0:6bf0743ece18 38 #include "pwmout_device.h"
demayer 0:6bf0743ece18 39
demayer 0:6bf0743ece18 40 static TIM_HandleTypeDef TimHandle;
demayer 0:6bf0743ece18 41
demayer 0:6bf0743ece18 42 void pwmout_init(pwmout_t* obj, PinName pin)
demayer 0:6bf0743ece18 43 {
demayer 0:6bf0743ece18 44 // Get the peripheral name from the pin and assign it to the object
demayer 0:6bf0743ece18 45 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
demayer 0:6bf0743ece18 46 MBED_ASSERT(obj->pwm != (PWMName)NC);
demayer 0:6bf0743ece18 47
demayer 0:6bf0743ece18 48 // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
demayer 0:6bf0743ece18 49 uint32_t function = pinmap_function(pin, PinMap_PWM);
demayer 0:6bf0743ece18 50 MBED_ASSERT(function != (uint32_t)NC);
demayer 0:6bf0743ece18 51 obj->channel = STM_PIN_CHANNEL(function);
demayer 0:6bf0743ece18 52 obj->inverted = STM_PIN_INVERTED(function);
demayer 0:6bf0743ece18 53
demayer 0:6bf0743ece18 54 // Enable TIM clock
demayer 0:6bf0743ece18 55 #if defined(TIM1_BASE)
demayer 0:6bf0743ece18 56 if (obj->pwm == PWM_1){
demayer 0:6bf0743ece18 57 __HAL_RCC_TIM1_CLK_ENABLE();
demayer 0:6bf0743ece18 58 }
demayer 0:6bf0743ece18 59 #endif
demayer 0:6bf0743ece18 60 #if defined(TIM2_BASE)
demayer 0:6bf0743ece18 61 if (obj->pwm == PWM_2) {
demayer 0:6bf0743ece18 62 __HAL_RCC_TIM2_CLK_ENABLE();
demayer 0:6bf0743ece18 63 }
demayer 0:6bf0743ece18 64 #endif
demayer 0:6bf0743ece18 65 #if defined(TIM3_BASE)
demayer 0:6bf0743ece18 66 if (obj->pwm == PWM_3) {
demayer 0:6bf0743ece18 67 __HAL_RCC_TIM3_CLK_ENABLE();
demayer 0:6bf0743ece18 68 }
demayer 0:6bf0743ece18 69 #endif
demayer 0:6bf0743ece18 70 #if defined(TIM4_BASE)
demayer 0:6bf0743ece18 71 if (obj->pwm == PWM_4) {
demayer 0:6bf0743ece18 72 __HAL_RCC_TIM4_CLK_ENABLE();
demayer 0:6bf0743ece18 73 }
demayer 0:6bf0743ece18 74 #endif
demayer 0:6bf0743ece18 75 #if defined(TIM5_BASE)
demayer 0:6bf0743ece18 76 if (obj->pwm == PWM_5) {
demayer 0:6bf0743ece18 77 __HAL_RCC_TIM5_CLK_ENABLE();
demayer 0:6bf0743ece18 78 }
demayer 0:6bf0743ece18 79 #endif
demayer 0:6bf0743ece18 80 #if defined(TIM8_BASE)
demayer 0:6bf0743ece18 81 if (obj->pwm == PWM_8) {
demayer 0:6bf0743ece18 82 __HAL_RCC_TIM8_CLK_ENABLE();
demayer 0:6bf0743ece18 83 }
demayer 0:6bf0743ece18 84 #endif
demayer 0:6bf0743ece18 85 #if defined(TIM9_BASE)
demayer 0:6bf0743ece18 86 if (obj->pwm == PWM_9) {
demayer 0:6bf0743ece18 87 __HAL_RCC_TIM9_CLK_ENABLE();
demayer 0:6bf0743ece18 88 }
demayer 0:6bf0743ece18 89 #endif
demayer 0:6bf0743ece18 90 #if defined(TIM10_BASE)
demayer 0:6bf0743ece18 91 if (obj->pwm == PWM_10) {
demayer 0:6bf0743ece18 92 __HAL_RCC_TIM10_CLK_ENABLE();
demayer 0:6bf0743ece18 93 }
demayer 0:6bf0743ece18 94 #endif
demayer 0:6bf0743ece18 95 #if defined(TIM11_BASE)
demayer 0:6bf0743ece18 96 if (obj->pwm == PWM_11) {
demayer 0:6bf0743ece18 97 __HAL_RCC_TIM11_CLK_ENABLE();
demayer 0:6bf0743ece18 98 }
demayer 0:6bf0743ece18 99 #endif
demayer 0:6bf0743ece18 100 #if defined(TIM12_BASE)
demayer 0:6bf0743ece18 101 if (obj->pwm == PWM_12) {
demayer 0:6bf0743ece18 102 __HAL_RCC_TIM12_CLK_ENABLE();
demayer 0:6bf0743ece18 103 }
demayer 0:6bf0743ece18 104 #endif
demayer 0:6bf0743ece18 105 #if defined(TIM13_BASE)
demayer 0:6bf0743ece18 106 if (obj->pwm == PWM_13) {
demayer 0:6bf0743ece18 107 __HAL_RCC_TIM13_CLK_ENABLE();
demayer 0:6bf0743ece18 108 }
demayer 0:6bf0743ece18 109 #endif
demayer 0:6bf0743ece18 110 #if defined(TIM14_BASE)
demayer 0:6bf0743ece18 111 if (obj->pwm == PWM_14) {
demayer 0:6bf0743ece18 112 __HAL_RCC_TIM14_CLK_ENABLE();
demayer 0:6bf0743ece18 113 }
demayer 0:6bf0743ece18 114 #endif
demayer 0:6bf0743ece18 115 #if defined(TIM15_BASE)
demayer 0:6bf0743ece18 116 if (obj->pwm == PWM_15) {
demayer 0:6bf0743ece18 117 __HAL_RCC_TIM15_CLK_ENABLE();
demayer 0:6bf0743ece18 118 }
demayer 0:6bf0743ece18 119 #endif
demayer 0:6bf0743ece18 120 #if defined(TIM16_BASE)
demayer 0:6bf0743ece18 121 if (obj->pwm == PWM_16) {
demayer 0:6bf0743ece18 122 __HAL_RCC_TIM16_CLK_ENABLE();
demayer 0:6bf0743ece18 123 }
demayer 0:6bf0743ece18 124 #endif
demayer 0:6bf0743ece18 125 #if defined(TIM17_BASE)
demayer 0:6bf0743ece18 126 if (obj->pwm == PWM_17) {
demayer 0:6bf0743ece18 127 __HAL_RCC_TIM17_CLK_ENABLE();
demayer 0:6bf0743ece18 128 }
demayer 0:6bf0743ece18 129 #endif
demayer 0:6bf0743ece18 130 #if defined(TIM18_BASE)
demayer 0:6bf0743ece18 131 if (obj->pwm == PWM_18) {
demayer 0:6bf0743ece18 132 __HAL_RCC_TIM18_CLK_ENABLE();
demayer 0:6bf0743ece18 133 }
demayer 0:6bf0743ece18 134 #endif
demayer 0:6bf0743ece18 135 #if defined(TIM19_BASE)
demayer 0:6bf0743ece18 136 if (obj->pwm == PWM_19) {
demayer 0:6bf0743ece18 137 __HAL_RCC_TIM19_CLK_ENABLE();
demayer 0:6bf0743ece18 138 }
demayer 0:6bf0743ece18 139 #endif
demayer 0:6bf0743ece18 140 #if defined(TIM20_BASE)
demayer 0:6bf0743ece18 141 if (obj->pwm == PWM_20) {
demayer 0:6bf0743ece18 142 __HAL_RCC_TIM20_CLK_ENABLE();
demayer 0:6bf0743ece18 143 }
demayer 0:6bf0743ece18 144 #endif
demayer 0:6bf0743ece18 145 #if defined(TIM21_BASE)
demayer 0:6bf0743ece18 146 if (obj->pwm == PWM_21) {
demayer 0:6bf0743ece18 147 __HAL_RCC_TIM21_CLK_ENABLE();
demayer 0:6bf0743ece18 148 }
demayer 0:6bf0743ece18 149 #endif
demayer 0:6bf0743ece18 150 #if defined(TIM22_BASE)
demayer 0:6bf0743ece18 151 if (obj->pwm == PWM_22) {
demayer 0:6bf0743ece18 152 __HAL_RCC_TIM22_CLK_ENABLE();
demayer 0:6bf0743ece18 153 }
demayer 0:6bf0743ece18 154 #endif
demayer 0:6bf0743ece18 155 // Configure GPIO
demayer 0:6bf0743ece18 156 pinmap_pinout(pin, PinMap_PWM);
demayer 0:6bf0743ece18 157
demayer 0:6bf0743ece18 158 obj->pin = pin;
demayer 0:6bf0743ece18 159 obj->period = 0;
demayer 0:6bf0743ece18 160 obj->pulse = 0;
demayer 0:6bf0743ece18 161 obj->prescaler = 1;
demayer 0:6bf0743ece18 162
demayer 0:6bf0743ece18 163 pwmout_period_us(obj, 20000); // 20 ms per default
demayer 0:6bf0743ece18 164 }
demayer 0:6bf0743ece18 165
demayer 0:6bf0743ece18 166 void pwmout_free(pwmout_t* obj)
demayer 0:6bf0743ece18 167 {
demayer 0:6bf0743ece18 168 // Configure GPIO
demayer 0:6bf0743ece18 169 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
demayer 0:6bf0743ece18 170 }
demayer 0:6bf0743ece18 171
demayer 0:6bf0743ece18 172 void pwmout_write(pwmout_t* obj, float value)
demayer 0:6bf0743ece18 173 {
demayer 0:6bf0743ece18 174 TIM_OC_InitTypeDef sConfig;
demayer 0:6bf0743ece18 175 int channel = 0;
demayer 0:6bf0743ece18 176
demayer 0:6bf0743ece18 177 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
demayer 0:6bf0743ece18 178
demayer 0:6bf0743ece18 179 if (value < (float)0.0) {
demayer 0:6bf0743ece18 180 value = 0.0;
demayer 0:6bf0743ece18 181 } else if (value > (float)1.0) {
demayer 0:6bf0743ece18 182 value = 1.0;
demayer 0:6bf0743ece18 183 }
demayer 0:6bf0743ece18 184
demayer 0:6bf0743ece18 185 obj->pulse = (uint32_t)((float)obj->period * value);
demayer 0:6bf0743ece18 186
demayer 0:6bf0743ece18 187 // Configure channels
demayer 0:6bf0743ece18 188 sConfig.OCMode = TIM_OCMODE_PWM1;
demayer 0:6bf0743ece18 189 sConfig.Pulse = obj->pulse / obj->prescaler;
demayer 0:6bf0743ece18 190 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
demayer 0:6bf0743ece18 191 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
demayer 0:6bf0743ece18 192 #if defined(TIM_OCIDLESTATE_RESET)
demayer 0:6bf0743ece18 193 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
demayer 0:6bf0743ece18 194 #endif
demayer 0:6bf0743ece18 195 #if defined(TIM_OCNIDLESTATE_RESET)
demayer 0:6bf0743ece18 196 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
demayer 0:6bf0743ece18 197 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
demayer 0:6bf0743ece18 198 #endif
demayer 0:6bf0743ece18 199
demayer 0:6bf0743ece18 200 switch (obj->channel) {
demayer 0:6bf0743ece18 201 case 1:
demayer 0:6bf0743ece18 202 channel = TIM_CHANNEL_1;
demayer 0:6bf0743ece18 203 break;
demayer 0:6bf0743ece18 204 case 2:
demayer 0:6bf0743ece18 205 channel = TIM_CHANNEL_2;
demayer 0:6bf0743ece18 206 break;
demayer 0:6bf0743ece18 207 case 3:
demayer 0:6bf0743ece18 208 channel = TIM_CHANNEL_3;
demayer 0:6bf0743ece18 209 break;
demayer 0:6bf0743ece18 210 case 4:
demayer 0:6bf0743ece18 211 channel = TIM_CHANNEL_4;
demayer 0:6bf0743ece18 212 break;
demayer 0:6bf0743ece18 213 default:
demayer 0:6bf0743ece18 214 return;
demayer 0:6bf0743ece18 215 }
demayer 0:6bf0743ece18 216
demayer 0:6bf0743ece18 217 if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
demayer 0:6bf0743ece18 218 error("Cannot initialize PWM\n");
demayer 0:6bf0743ece18 219 }
demayer 0:6bf0743ece18 220
demayer 0:6bf0743ece18 221 #if !defined(PWMOUT_INVERTED_NOT_SUPPORTED)
demayer 0:6bf0743ece18 222 if (obj->inverted) {
demayer 0:6bf0743ece18 223 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
demayer 0:6bf0743ece18 224 } else
demayer 0:6bf0743ece18 225 #endif
demayer 0:6bf0743ece18 226 {
demayer 0:6bf0743ece18 227 HAL_TIM_PWM_Start(&TimHandle, channel);
demayer 0:6bf0743ece18 228 }
demayer 0:6bf0743ece18 229 }
demayer 0:6bf0743ece18 230
demayer 0:6bf0743ece18 231 float pwmout_read(pwmout_t* obj)
demayer 0:6bf0743ece18 232 {
demayer 0:6bf0743ece18 233 float value = 0;
demayer 0:6bf0743ece18 234 if (obj->period > 0) {
demayer 0:6bf0743ece18 235 value = (float)(obj->pulse) / (float)(obj->period);
demayer 0:6bf0743ece18 236 }
demayer 0:6bf0743ece18 237 return ((value > (float)1.0) ? (float)(1.0) : (value));
demayer 0:6bf0743ece18 238 }
demayer 0:6bf0743ece18 239
demayer 0:6bf0743ece18 240 void pwmout_period(pwmout_t* obj, float seconds)
demayer 0:6bf0743ece18 241 {
demayer 0:6bf0743ece18 242 pwmout_period_us(obj, seconds * 1000000.0f);
demayer 0:6bf0743ece18 243 }
demayer 0:6bf0743ece18 244
demayer 0:6bf0743ece18 245 void pwmout_period_ms(pwmout_t* obj, int ms)
demayer 0:6bf0743ece18 246 {
demayer 0:6bf0743ece18 247 pwmout_period_us(obj, ms * 1000);
demayer 0:6bf0743ece18 248 }
demayer 0:6bf0743ece18 249
demayer 0:6bf0743ece18 250 void pwmout_period_us(pwmout_t* obj, int us)
demayer 0:6bf0743ece18 251 {
demayer 0:6bf0743ece18 252 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
demayer 0:6bf0743ece18 253 RCC_ClkInitTypeDef RCC_ClkInitStruct;
demayer 0:6bf0743ece18 254 uint32_t PclkFreq = 0;
demayer 0:6bf0743ece18 255 uint32_t APBxCLKDivider = RCC_HCLK_DIV1;
demayer 0:6bf0743ece18 256 float dc = pwmout_read(obj);
demayer 0:6bf0743ece18 257 uint8_t i = 0;
demayer 0:6bf0743ece18 258
demayer 0:6bf0743ece18 259 __HAL_TIM_DISABLE(&TimHandle);
demayer 0:6bf0743ece18 260
demayer 0:6bf0743ece18 261 // Get clock configuration
demayer 0:6bf0743ece18 262 // Note: PclkFreq contains here the Latency (not used after)
demayer 0:6bf0743ece18 263 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
demayer 0:6bf0743ece18 264
demayer 0:6bf0743ece18 265 /* Parse the pwm / apb mapping table to find the right entry */
demayer 0:6bf0743ece18 266 while(pwm_apb_map_table[i].pwm != obj->pwm) {
demayer 0:6bf0743ece18 267 i++;
demayer 0:6bf0743ece18 268 }
demayer 0:6bf0743ece18 269
demayer 0:6bf0743ece18 270 if(pwm_apb_map_table[i].pwm == 0)
demayer 0:6bf0743ece18 271 error("Unknown PWM instance");
demayer 0:6bf0743ece18 272
demayer 0:6bf0743ece18 273 if(pwm_apb_map_table[i].pwmoutApb == PWMOUT_ON_APB1) {
demayer 0:6bf0743ece18 274 PclkFreq = HAL_RCC_GetPCLK1Freq();
demayer 0:6bf0743ece18 275 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
demayer 0:6bf0743ece18 276 } else {
demayer 0:6bf0743ece18 277 #if !defined(PWMOUT_APB2_NOT_SUPPORTED)
demayer 0:6bf0743ece18 278 PclkFreq = HAL_RCC_GetPCLK2Freq();
demayer 0:6bf0743ece18 279 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
demayer 0:6bf0743ece18 280 #endif
demayer 0:6bf0743ece18 281 }
demayer 0:6bf0743ece18 282
demayer 0:6bf0743ece18 283
demayer 0:6bf0743ece18 284 /* By default use, 1us as SW pre-scaler */
demayer 0:6bf0743ece18 285 obj->prescaler = 1;
demayer 0:6bf0743ece18 286 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
demayer 0:6bf0743ece18 287 if (APBxCLKDivider == RCC_HCLK_DIV1) {
demayer 0:6bf0743ece18 288 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000)) - 1; // 1 us tick
demayer 0:6bf0743ece18 289 } else {
demayer 0:6bf0743ece18 290 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000)) - 1; // 1 us tick
demayer 0:6bf0743ece18 291 }
demayer 0:6bf0743ece18 292 TimHandle.Init.Period = (us - 1);
demayer 0:6bf0743ece18 293
demayer 0:6bf0743ece18 294 /* In case period or pre-scalers are out of range, loop-in to get valid values */
demayer 0:6bf0743ece18 295 while ((TimHandle.Init.Period > 0xFFFF) || (TimHandle.Init.Prescaler > 0xFFFF)) {
demayer 0:6bf0743ece18 296 obj->prescaler = obj->prescaler * 2;
demayer 0:6bf0743ece18 297 if (APBxCLKDivider == RCC_HCLK_DIV1) {
demayer 0:6bf0743ece18 298 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000) * obj->prescaler) - 1;
demayer 0:6bf0743ece18 299 } else {
demayer 0:6bf0743ece18 300 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000) * obj->prescaler) - 1;
demayer 0:6bf0743ece18 301 }
demayer 0:6bf0743ece18 302 TimHandle.Init.Period = (us - 1) / obj->prescaler;
demayer 0:6bf0743ece18 303 /* Period decreases and prescaler increases over loops, so check for
demayer 0:6bf0743ece18 304 * possible out of range cases */
demayer 0:6bf0743ece18 305 if ((TimHandle.Init.Period < 0xFFFF) && (TimHandle.Init.Prescaler > 0xFFFF)) {
demayer 0:6bf0743ece18 306 error("Cannot initialize PWM\n");
demayer 0:6bf0743ece18 307 break;
demayer 0:6bf0743ece18 308 }
demayer 0:6bf0743ece18 309 }
demayer 0:6bf0743ece18 310
demayer 0:6bf0743ece18 311 TimHandle.Init.ClockDivision = 0;
demayer 0:6bf0743ece18 312 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
demayer 0:6bf0743ece18 313
demayer 0:6bf0743ece18 314 if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
demayer 0:6bf0743ece18 315 error("Cannot initialize PWM\n");
demayer 0:6bf0743ece18 316 }
demayer 0:6bf0743ece18 317
demayer 0:6bf0743ece18 318 // Save for future use
demayer 0:6bf0743ece18 319 obj->period = us;
demayer 0:6bf0743ece18 320
demayer 0:6bf0743ece18 321 // Set duty cycle again
demayer 0:6bf0743ece18 322 pwmout_write(obj, dc);
demayer 0:6bf0743ece18 323
demayer 0:6bf0743ece18 324 __HAL_TIM_ENABLE(&TimHandle);
demayer 0:6bf0743ece18 325 }
demayer 0:6bf0743ece18 326
demayer 0:6bf0743ece18 327 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
demayer 0:6bf0743ece18 328 {
demayer 0:6bf0743ece18 329 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
demayer 0:6bf0743ece18 330 }
demayer 0:6bf0743ece18 331
demayer 0:6bf0743ece18 332 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
demayer 0:6bf0743ece18 333 {
demayer 0:6bf0743ece18 334 pwmout_pulsewidth_us(obj, ms * 1000);
demayer 0:6bf0743ece18 335 }
demayer 0:6bf0743ece18 336
demayer 0:6bf0743ece18 337 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
demayer 0:6bf0743ece18 338 {
demayer 0:6bf0743ece18 339 float value = (float)us / (float)obj->period;
demayer 0:6bf0743ece18 340 pwmout_write(obj, value);
demayer 0:6bf0743ece18 341 }
demayer 0:6bf0743ece18 342
demayer 0:6bf0743ece18 343 #endif