Andrew SaLoutos / mbed-dev-STM-lean

From Ben Katz mbed-dev library. Removed unnecessary target files to reduce the overall size by a factor of 10 to make it easier to import into the online IDE.

Dependents:   motor_driver motor_driver_screaming_fix

targets/TARGET_STM/pwmout_api.c@0:083111ae2a11, 2020-11-26 (annotated)

Committer:
saloutos
Date:
Thu Nov 26 04:08:56 2020 +0000
Revision:
0:083111ae2a11
first commit of leaned mbed dev lib

Who changed what in which revision?

UserRevisionLine numberNew contents of line
saloutos 0:083111ae2a11 1 /* mbed Microcontroller Library
saloutos 0:083111ae2a11 2 *******************************************************************************
saloutos 0:083111ae2a11 3 * Copyright (c) 2015, STMicroelectronics
saloutos 0:083111ae2a11 4 * All rights reserved.
saloutos 0:083111ae2a11 5 *
saloutos 0:083111ae2a11 6 * Redistribution and use in source and binary forms, with or without
saloutos 0:083111ae2a11 7 * modification, are permitted provided that the following conditions are met:
saloutos 0:083111ae2a11 8 *
saloutos 0:083111ae2a11 9 * 1. Redistributions of source code must retain the above copyright notice,
saloutos 0:083111ae2a11 10 * this list of conditions and the following disclaimer.
saloutos 0:083111ae2a11 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
saloutos 0:083111ae2a11 12 * this list of conditions and the following disclaimer in the documentation
saloutos 0:083111ae2a11 13 * and/or other materials provided with the distribution.
saloutos 0:083111ae2a11 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
saloutos 0:083111ae2a11 15 * may be used to endorse or promote products derived from this software
saloutos 0:083111ae2a11 16 * without specific prior written permission.
saloutos 0:083111ae2a11 17 *
saloutos 0:083111ae2a11 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
saloutos 0:083111ae2a11 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
saloutos 0:083111ae2a11 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
saloutos 0:083111ae2a11 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
saloutos 0:083111ae2a11 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
saloutos 0:083111ae2a11 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
saloutos 0:083111ae2a11 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
saloutos 0:083111ae2a11 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
saloutos 0:083111ae2a11 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
saloutos 0:083111ae2a11 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
saloutos 0:083111ae2a11 28 *******************************************************************************
saloutos 0:083111ae2a11 29 */
saloutos 0:083111ae2a11 30 #include "pwmout_api.h"
saloutos 0:083111ae2a11 31
saloutos 0:083111ae2a11 32 #if DEVICE_PWMOUT
saloutos 0:083111ae2a11 33
saloutos 0:083111ae2a11 34 #include "cmsis.h"
saloutos 0:083111ae2a11 35 #include "pinmap.h"
saloutos 0:083111ae2a11 36 #include "mbed_error.h"
saloutos 0:083111ae2a11 37 #include "PeripheralPins.h"
saloutos 0:083111ae2a11 38 #include "pwmout_device.h"
saloutos 0:083111ae2a11 39
saloutos 0:083111ae2a11 40 static TIM_HandleTypeDef TimHandle;
saloutos 0:083111ae2a11 41
saloutos 0:083111ae2a11 42 void pwmout_init(pwmout_t* obj, PinName pin)
saloutos 0:083111ae2a11 43 {
saloutos 0:083111ae2a11 44 // Get the peripheral name from the pin and assign it to the object
saloutos 0:083111ae2a11 45 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
saloutos 0:083111ae2a11 46 MBED_ASSERT(obj->pwm != (PWMName)NC);
saloutos 0:083111ae2a11 47
saloutos 0:083111ae2a11 48 // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
saloutos 0:083111ae2a11 49 uint32_t function = pinmap_function(pin, PinMap_PWM);
saloutos 0:083111ae2a11 50 MBED_ASSERT(function != (uint32_t)NC);
saloutos 0:083111ae2a11 51 obj->channel = STM_PIN_CHANNEL(function);
saloutos 0:083111ae2a11 52 obj->inverted = STM_PIN_INVERTED(function);
saloutos 0:083111ae2a11 53
saloutos 0:083111ae2a11 54 // Enable TIM clock
saloutos 0:083111ae2a11 55 #if defined(TIM1_BASE)
saloutos 0:083111ae2a11 56 if (obj->pwm == PWM_1){
saloutos 0:083111ae2a11 57 __HAL_RCC_TIM1_CLK_ENABLE();
saloutos 0:083111ae2a11 58 }
saloutos 0:083111ae2a11 59 #endif
saloutos 0:083111ae2a11 60 #if defined(TIM2_BASE)
saloutos 0:083111ae2a11 61 if (obj->pwm == PWM_2) {
saloutos 0:083111ae2a11 62 __HAL_RCC_TIM2_CLK_ENABLE();
saloutos 0:083111ae2a11 63 }
saloutos 0:083111ae2a11 64 #endif
saloutos 0:083111ae2a11 65 #if defined(TIM3_BASE)
saloutos 0:083111ae2a11 66 if (obj->pwm == PWM_3) {
saloutos 0:083111ae2a11 67 __HAL_RCC_TIM3_CLK_ENABLE();
saloutos 0:083111ae2a11 68 }
saloutos 0:083111ae2a11 69 #endif
saloutos 0:083111ae2a11 70 #if defined(TIM4_BASE)
saloutos 0:083111ae2a11 71 if (obj->pwm == PWM_4) {
saloutos 0:083111ae2a11 72 __HAL_RCC_TIM4_CLK_ENABLE();
saloutos 0:083111ae2a11 73 }
saloutos 0:083111ae2a11 74 #endif
saloutos 0:083111ae2a11 75 #if defined(TIM5_BASE)
saloutos 0:083111ae2a11 76 if (obj->pwm == PWM_5) {
saloutos 0:083111ae2a11 77 __HAL_RCC_TIM5_CLK_ENABLE();
saloutos 0:083111ae2a11 78 }
saloutos 0:083111ae2a11 79 #endif
saloutos 0:083111ae2a11 80 #if defined(TIM8_BASE)
saloutos 0:083111ae2a11 81 if (obj->pwm == PWM_8) {
saloutos 0:083111ae2a11 82 __HAL_RCC_TIM8_CLK_ENABLE();
saloutos 0:083111ae2a11 83 }
saloutos 0:083111ae2a11 84 #endif
saloutos 0:083111ae2a11 85 #if defined(TIM9_BASE)
saloutos 0:083111ae2a11 86 if (obj->pwm == PWM_9) {
saloutos 0:083111ae2a11 87 __HAL_RCC_TIM9_CLK_ENABLE();
saloutos 0:083111ae2a11 88 }
saloutos 0:083111ae2a11 89 #endif
saloutos 0:083111ae2a11 90 #if defined(TIM10_BASE)
saloutos 0:083111ae2a11 91 if (obj->pwm == PWM_10) {
saloutos 0:083111ae2a11 92 __HAL_RCC_TIM10_CLK_ENABLE();
saloutos 0:083111ae2a11 93 }
saloutos 0:083111ae2a11 94 #endif
saloutos 0:083111ae2a11 95 #if defined(TIM11_BASE)
saloutos 0:083111ae2a11 96 if (obj->pwm == PWM_11) {
saloutos 0:083111ae2a11 97 __HAL_RCC_TIM11_CLK_ENABLE();
saloutos 0:083111ae2a11 98 }
saloutos 0:083111ae2a11 99 #endif
saloutos 0:083111ae2a11 100 #if defined(TIM12_BASE)
saloutos 0:083111ae2a11 101 if (obj->pwm == PWM_12) {
saloutos 0:083111ae2a11 102 __HAL_RCC_TIM12_CLK_ENABLE();
saloutos 0:083111ae2a11 103 }
saloutos 0:083111ae2a11 104 #endif
saloutos 0:083111ae2a11 105 #if defined(TIM13_BASE)
saloutos 0:083111ae2a11 106 if (obj->pwm == PWM_13) {
saloutos 0:083111ae2a11 107 __HAL_RCC_TIM13_CLK_ENABLE();
saloutos 0:083111ae2a11 108 }
saloutos 0:083111ae2a11 109 #endif
saloutos 0:083111ae2a11 110 #if defined(TIM14_BASE)
saloutos 0:083111ae2a11 111 if (obj->pwm == PWM_14) {
saloutos 0:083111ae2a11 112 __HAL_RCC_TIM14_CLK_ENABLE();
saloutos 0:083111ae2a11 113 }
saloutos 0:083111ae2a11 114 #endif
saloutos 0:083111ae2a11 115 #if defined(TIM15_BASE)
saloutos 0:083111ae2a11 116 if (obj->pwm == PWM_15) {
saloutos 0:083111ae2a11 117 __HAL_RCC_TIM15_CLK_ENABLE();
saloutos 0:083111ae2a11 118 }
saloutos 0:083111ae2a11 119 #endif
saloutos 0:083111ae2a11 120 #if defined(TIM16_BASE)
saloutos 0:083111ae2a11 121 if (obj->pwm == PWM_16) {
saloutos 0:083111ae2a11 122 __HAL_RCC_TIM16_CLK_ENABLE();
saloutos 0:083111ae2a11 123 }
saloutos 0:083111ae2a11 124 #endif
saloutos 0:083111ae2a11 125 #if defined(TIM17_BASE)
saloutos 0:083111ae2a11 126 if (obj->pwm == PWM_17) {
saloutos 0:083111ae2a11 127 __HAL_RCC_TIM17_CLK_ENABLE();
saloutos 0:083111ae2a11 128 }
saloutos 0:083111ae2a11 129 #endif
saloutos 0:083111ae2a11 130 #if defined(TIM18_BASE)
saloutos 0:083111ae2a11 131 if (obj->pwm == PWM_18) {
saloutos 0:083111ae2a11 132 __HAL_RCC_TIM18_CLK_ENABLE();
saloutos 0:083111ae2a11 133 }
saloutos 0:083111ae2a11 134 #endif
saloutos 0:083111ae2a11 135 #if defined(TIM19_BASE)
saloutos 0:083111ae2a11 136 if (obj->pwm == PWM_19) {
saloutos 0:083111ae2a11 137 __HAL_RCC_TIM19_CLK_ENABLE();
saloutos 0:083111ae2a11 138 }
saloutos 0:083111ae2a11 139 #endif
saloutos 0:083111ae2a11 140 #if defined(TIM20_BASE)
saloutos 0:083111ae2a11 141 if (obj->pwm == PWM_20) {
saloutos 0:083111ae2a11 142 __HAL_RCC_TIM20_CLK_ENABLE();
saloutos 0:083111ae2a11 143 }
saloutos 0:083111ae2a11 144 #endif
saloutos 0:083111ae2a11 145 #if defined(TIM21_BASE)
saloutos 0:083111ae2a11 146 if (obj->pwm == PWM_21) {
saloutos 0:083111ae2a11 147 __HAL_RCC_TIM21_CLK_ENABLE();
saloutos 0:083111ae2a11 148 }
saloutos 0:083111ae2a11 149 #endif
saloutos 0:083111ae2a11 150 #if defined(TIM22_BASE)
saloutos 0:083111ae2a11 151 if (obj->pwm == PWM_22) {
saloutos 0:083111ae2a11 152 __HAL_RCC_TIM22_CLK_ENABLE();
saloutos 0:083111ae2a11 153 }
saloutos 0:083111ae2a11 154 #endif
saloutos 0:083111ae2a11 155 // Configure GPIO
saloutos 0:083111ae2a11 156 pinmap_pinout(pin, PinMap_PWM);
saloutos 0:083111ae2a11 157
saloutos 0:083111ae2a11 158 obj->pin = pin;
saloutos 0:083111ae2a11 159 obj->period = 0;
saloutos 0:083111ae2a11 160 obj->pulse = 0;
saloutos 0:083111ae2a11 161 obj->prescaler = 1;
saloutos 0:083111ae2a11 162
saloutos 0:083111ae2a11 163 pwmout_period_us(obj, 20000); // 20 ms per default
saloutos 0:083111ae2a11 164 }
saloutos 0:083111ae2a11 165
saloutos 0:083111ae2a11 166 void pwmout_free(pwmout_t* obj)
saloutos 0:083111ae2a11 167 {
saloutos 0:083111ae2a11 168 // Configure GPIO
saloutos 0:083111ae2a11 169 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
saloutos 0:083111ae2a11 170 }
saloutos 0:083111ae2a11 171
saloutos 0:083111ae2a11 172 void pwmout_write(pwmout_t* obj, float value)
saloutos 0:083111ae2a11 173 {
saloutos 0:083111ae2a11 174 TIM_OC_InitTypeDef sConfig;
saloutos 0:083111ae2a11 175 int channel = 0;
saloutos 0:083111ae2a11 176
saloutos 0:083111ae2a11 177 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
saloutos 0:083111ae2a11 178
saloutos 0:083111ae2a11 179 if (value < (float)0.0) {
saloutos 0:083111ae2a11 180 value = 0.0;
saloutos 0:083111ae2a11 181 } else if (value > (float)1.0) {
saloutos 0:083111ae2a11 182 value = 1.0;
saloutos 0:083111ae2a11 183 }
saloutos 0:083111ae2a11 184
saloutos 0:083111ae2a11 185 obj->pulse = (uint32_t)((float)obj->period * value);
saloutos 0:083111ae2a11 186
saloutos 0:083111ae2a11 187 // Configure channels
saloutos 0:083111ae2a11 188 sConfig.OCMode = TIM_OCMODE_PWM1;
saloutos 0:083111ae2a11 189 sConfig.Pulse = obj->pulse / obj->prescaler;
saloutos 0:083111ae2a11 190 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
saloutos 0:083111ae2a11 191 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
saloutos 0:083111ae2a11 192 #if defined(TIM_OCIDLESTATE_RESET)
saloutos 0:083111ae2a11 193 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
saloutos 0:083111ae2a11 194 #endif
saloutos 0:083111ae2a11 195 #if defined(TIM_OCNIDLESTATE_RESET)
saloutos 0:083111ae2a11 196 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
saloutos 0:083111ae2a11 197 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
saloutos 0:083111ae2a11 198 #endif
saloutos 0:083111ae2a11 199
saloutos 0:083111ae2a11 200 switch (obj->channel) {
saloutos 0:083111ae2a11 201 case 1:
saloutos 0:083111ae2a11 202 channel = TIM_CHANNEL_1;
saloutos 0:083111ae2a11 203 break;
saloutos 0:083111ae2a11 204 case 2:
saloutos 0:083111ae2a11 205 channel = TIM_CHANNEL_2;
saloutos 0:083111ae2a11 206 break;
saloutos 0:083111ae2a11 207 case 3:
saloutos 0:083111ae2a11 208 channel = TIM_CHANNEL_3;
saloutos 0:083111ae2a11 209 break;
saloutos 0:083111ae2a11 210 case 4:
saloutos 0:083111ae2a11 211 channel = TIM_CHANNEL_4;
saloutos 0:083111ae2a11 212 break;
saloutos 0:083111ae2a11 213 default:
saloutos 0:083111ae2a11 214 return;
saloutos 0:083111ae2a11 215 }
saloutos 0:083111ae2a11 216
saloutos 0:083111ae2a11 217 if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
saloutos 0:083111ae2a11 218 error("Cannot initialize PWM\n");
saloutos 0:083111ae2a11 219 }
saloutos 0:083111ae2a11 220
saloutos 0:083111ae2a11 221 #if !defined(PWMOUT_INVERTED_NOT_SUPPORTED)
saloutos 0:083111ae2a11 222 if (obj->inverted) {
saloutos 0:083111ae2a11 223 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
saloutos 0:083111ae2a11 224 } else
saloutos 0:083111ae2a11 225 #endif
saloutos 0:083111ae2a11 226 {
saloutos 0:083111ae2a11 227 HAL_TIM_PWM_Start(&TimHandle, channel);
saloutos 0:083111ae2a11 228 }
saloutos 0:083111ae2a11 229 }
saloutos 0:083111ae2a11 230
saloutos 0:083111ae2a11 231 float pwmout_read(pwmout_t* obj)
saloutos 0:083111ae2a11 232 {
saloutos 0:083111ae2a11 233 float value = 0;
saloutos 0:083111ae2a11 234 if (obj->period > 0) {
saloutos 0:083111ae2a11 235 value = (float)(obj->pulse) / (float)(obj->period);
saloutos 0:083111ae2a11 236 }
saloutos 0:083111ae2a11 237 return ((value > (float)1.0) ? (float)(1.0) : (value));
saloutos 0:083111ae2a11 238 }
saloutos 0:083111ae2a11 239
saloutos 0:083111ae2a11 240 void pwmout_period(pwmout_t* obj, float seconds)
saloutos 0:083111ae2a11 241 {
saloutos 0:083111ae2a11 242 pwmout_period_us(obj, seconds * 1000000.0f);
saloutos 0:083111ae2a11 243 }
saloutos 0:083111ae2a11 244
saloutos 0:083111ae2a11 245 void pwmout_period_ms(pwmout_t* obj, int ms)
saloutos 0:083111ae2a11 246 {
saloutos 0:083111ae2a11 247 pwmout_period_us(obj, ms * 1000);
saloutos 0:083111ae2a11 248 }
saloutos 0:083111ae2a11 249
saloutos 0:083111ae2a11 250 void pwmout_period_us(pwmout_t* obj, int us)
saloutos 0:083111ae2a11 251 {
saloutos 0:083111ae2a11 252 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
saloutos 0:083111ae2a11 253 RCC_ClkInitTypeDef RCC_ClkInitStruct;
saloutos 0:083111ae2a11 254 uint32_t PclkFreq = 0;
saloutos 0:083111ae2a11 255 uint32_t APBxCLKDivider = RCC_HCLK_DIV1;
saloutos 0:083111ae2a11 256 float dc = pwmout_read(obj);
saloutos 0:083111ae2a11 257 uint8_t i = 0;
saloutos 0:083111ae2a11 258
saloutos 0:083111ae2a11 259 __HAL_TIM_DISABLE(&TimHandle);
saloutos 0:083111ae2a11 260
saloutos 0:083111ae2a11 261 // Get clock configuration
saloutos 0:083111ae2a11 262 // Note: PclkFreq contains here the Latency (not used after)
saloutos 0:083111ae2a11 263 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
saloutos 0:083111ae2a11 264
saloutos 0:083111ae2a11 265 /* Parse the pwm / apb mapping table to find the right entry */
saloutos 0:083111ae2a11 266 while(pwm_apb_map_table[i].pwm != obj->pwm) {
saloutos 0:083111ae2a11 267 i++;
saloutos 0:083111ae2a11 268 }
saloutos 0:083111ae2a11 269
saloutos 0:083111ae2a11 270 if(pwm_apb_map_table[i].pwm == 0)
saloutos 0:083111ae2a11 271 error("Unknown PWM instance");
saloutos 0:083111ae2a11 272
saloutos 0:083111ae2a11 273 if(pwm_apb_map_table[i].pwmoutApb == PWMOUT_ON_APB1) {
saloutos 0:083111ae2a11 274 PclkFreq = HAL_RCC_GetPCLK1Freq();
saloutos 0:083111ae2a11 275 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
saloutos 0:083111ae2a11 276 } else {
saloutos 0:083111ae2a11 277 #if !defined(PWMOUT_APB2_NOT_SUPPORTED)
saloutos 0:083111ae2a11 278 PclkFreq = HAL_RCC_GetPCLK2Freq();
saloutos 0:083111ae2a11 279 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
saloutos 0:083111ae2a11 280 #endif
saloutos 0:083111ae2a11 281 }
saloutos 0:083111ae2a11 282
saloutos 0:083111ae2a11 283
saloutos 0:083111ae2a11 284 /* By default use, 1us as SW pre-scaler */
saloutos 0:083111ae2a11 285 obj->prescaler = 1;
saloutos 0:083111ae2a11 286 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
saloutos 0:083111ae2a11 287 if (APBxCLKDivider == RCC_HCLK_DIV1) {
saloutos 0:083111ae2a11 288 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000)) - 1; // 1 us tick
saloutos 0:083111ae2a11 289 } else {
saloutos 0:083111ae2a11 290 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000)) - 1; // 1 us tick
saloutos 0:083111ae2a11 291 }
saloutos 0:083111ae2a11 292 TimHandle.Init.Period = (us - 1);
saloutos 0:083111ae2a11 293
saloutos 0:083111ae2a11 294 /* In case period or pre-scalers are out of range, loop-in to get valid values */
saloutos 0:083111ae2a11 295 while ((TimHandle.Init.Period > 0xFFFF) || (TimHandle.Init.Prescaler > 0xFFFF)) {
saloutos 0:083111ae2a11 296 obj->prescaler = obj->prescaler * 2;
saloutos 0:083111ae2a11 297 if (APBxCLKDivider == RCC_HCLK_DIV1) {
saloutos 0:083111ae2a11 298 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000) * obj->prescaler) - 1;
saloutos 0:083111ae2a11 299 } else {
saloutos 0:083111ae2a11 300 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000) * obj->prescaler) - 1;
saloutos 0:083111ae2a11 301 }
saloutos 0:083111ae2a11 302 TimHandle.Init.Period = (us - 1) / obj->prescaler;
saloutos 0:083111ae2a11 303 /* Period decreases and prescaler increases over loops, so check for
saloutos 0:083111ae2a11 304 * possible out of range cases */
saloutos 0:083111ae2a11 305 if ((TimHandle.Init.Period < 0xFFFF) && (TimHandle.Init.Prescaler > 0xFFFF)) {
saloutos 0:083111ae2a11 306 error("Cannot initialize PWM\n");
saloutos 0:083111ae2a11 307 break;
saloutos 0:083111ae2a11 308 }
saloutos 0:083111ae2a11 309 }
saloutos 0:083111ae2a11 310
saloutos 0:083111ae2a11 311 TimHandle.Init.ClockDivision = 0;
saloutos 0:083111ae2a11 312 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
saloutos 0:083111ae2a11 313
saloutos 0:083111ae2a11 314 if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
saloutos 0:083111ae2a11 315 error("Cannot initialize PWM\n");
saloutos 0:083111ae2a11 316 }
saloutos 0:083111ae2a11 317
saloutos 0:083111ae2a11 318 // Save for future use
saloutos 0:083111ae2a11 319 obj->period = us;
saloutos 0:083111ae2a11 320
saloutos 0:083111ae2a11 321 // Set duty cycle again
saloutos 0:083111ae2a11 322 pwmout_write(obj, dc);
saloutos 0:083111ae2a11 323
saloutos 0:083111ae2a11 324 __HAL_TIM_ENABLE(&TimHandle);
saloutos 0:083111ae2a11 325 }
saloutos 0:083111ae2a11 326
saloutos 0:083111ae2a11 327 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
saloutos 0:083111ae2a11 328 {
saloutos 0:083111ae2a11 329 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
saloutos 0:083111ae2a11 330 }
saloutos 0:083111ae2a11 331
saloutos 0:083111ae2a11 332 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
saloutos 0:083111ae2a11 333 {
saloutos 0:083111ae2a11 334 pwmout_pulsewidth_us(obj, ms * 1000);
saloutos 0:083111ae2a11 335 }
saloutos 0:083111ae2a11 336
saloutos 0:083111ae2a11 337 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
saloutos 0:083111ae2a11 338 {
saloutos 0:083111ae2a11 339 float value = (float)us / (float)obj->period;
saloutos 0:083111ae2a11 340 pwmout_write(obj, value);
saloutos 0:083111ae2a11 341 }
saloutos 0:083111ae2a11 342
saloutos 0:083111ae2a11 343 #endif