Gan likun / mbed1-dev

001

targets/TARGET_STM/pwmout_api.c@0:13413ea9a877, 2022-06-12 (annotated)

Committer:
ganlikun
Date:
Sun Jun 12 14:02:44 2022 +0000
Revision:
0:13413ea9a877
00

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ganlikun 0:13413ea9a877 1 /* mbed Microcontroller Library
ganlikun 0:13413ea9a877 2 *******************************************************************************
ganlikun 0:13413ea9a877 3 * Copyright (c) 2015, STMicroelectronics
ganlikun 0:13413ea9a877 4 * All rights reserved.
ganlikun 0:13413ea9a877 5 *
ganlikun 0:13413ea9a877 6 * Redistribution and use in source and binary forms, with or without
ganlikun 0:13413ea9a877 7 * modification, are permitted provided that the following conditions are met:
ganlikun 0:13413ea9a877 8 *
ganlikun 0:13413ea9a877 9 * 1. Redistributions of source code must retain the above copyright notice,
ganlikun 0:13413ea9a877 10 * this list of conditions and the following disclaimer.
ganlikun 0:13413ea9a877 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ganlikun 0:13413ea9a877 12 * this list of conditions and the following disclaimer in the documentation
ganlikun 0:13413ea9a877 13 * and/or other materials provided with the distribution.
ganlikun 0:13413ea9a877 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ganlikun 0:13413ea9a877 15 * may be used to endorse or promote products derived from this software
ganlikun 0:13413ea9a877 16 * without specific prior written permission.
ganlikun 0:13413ea9a877 17 *
ganlikun 0:13413ea9a877 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ganlikun 0:13413ea9a877 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ganlikun 0:13413ea9a877 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ganlikun 0:13413ea9a877 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ganlikun 0:13413ea9a877 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ganlikun 0:13413ea9a877 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ganlikun 0:13413ea9a877 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ganlikun 0:13413ea9a877 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ganlikun 0:13413ea9a877 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ganlikun 0:13413ea9a877 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ganlikun 0:13413ea9a877 28 *******************************************************************************
ganlikun 0:13413ea9a877 29 */
ganlikun 0:13413ea9a877 30 #include "pwmout_api.h"
ganlikun 0:13413ea9a877 31
ganlikun 0:13413ea9a877 32 #if DEVICE_PWMOUT
ganlikun 0:13413ea9a877 33
ganlikun 0:13413ea9a877 34 #include "cmsis.h"
ganlikun 0:13413ea9a877 35 #include "pinmap.h"
ganlikun 0:13413ea9a877 36 #include "mbed_error.h"
ganlikun 0:13413ea9a877 37 #include "PeripheralPins.h"
ganlikun 0:13413ea9a877 38 #include "pwmout_device.h"
ganlikun 0:13413ea9a877 39
ganlikun 0:13413ea9a877 40 static TIM_HandleTypeDef TimHandle;
ganlikun 0:13413ea9a877 41
ganlikun 0:13413ea9a877 42 void pwmout_init(pwmout_t* obj, PinName pin)
ganlikun 0:13413ea9a877 43 {
ganlikun 0:13413ea9a877 44 // Get the peripheral name from the pin and assign it to the object
ganlikun 0:13413ea9a877 45 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
ganlikun 0:13413ea9a877 46 MBED_ASSERT(obj->pwm != (PWMName)NC);
ganlikun 0:13413ea9a877 47
ganlikun 0:13413ea9a877 48 // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
ganlikun 0:13413ea9a877 49 uint32_t function = pinmap_function(pin, PinMap_PWM);
ganlikun 0:13413ea9a877 50 MBED_ASSERT(function != (uint32_t)NC);
ganlikun 0:13413ea9a877 51 obj->channel = STM_PIN_CHANNEL(function);
ganlikun 0:13413ea9a877 52 obj->inverted = STM_PIN_INVERTED(function);
ganlikun 0:13413ea9a877 53
ganlikun 0:13413ea9a877 54 // Enable TIM clock
ganlikun 0:13413ea9a877 55 #if defined(TIM1_BASE)
ganlikun 0:13413ea9a877 56 if (obj->pwm == PWM_1){
ganlikun 0:13413ea9a877 57 __HAL_RCC_TIM1_CLK_ENABLE();
ganlikun 0:13413ea9a877 58 }
ganlikun 0:13413ea9a877 59 #endif
ganlikun 0:13413ea9a877 60 #if defined(TIM2_BASE)
ganlikun 0:13413ea9a877 61 if (obj->pwm == PWM_2) {
ganlikun 0:13413ea9a877 62 __HAL_RCC_TIM2_CLK_ENABLE();
ganlikun 0:13413ea9a877 63 }
ganlikun 0:13413ea9a877 64 #endif
ganlikun 0:13413ea9a877 65 #if defined(TIM3_BASE)
ganlikun 0:13413ea9a877 66 if (obj->pwm == PWM_3) {
ganlikun 0:13413ea9a877 67 __HAL_RCC_TIM3_CLK_ENABLE();
ganlikun 0:13413ea9a877 68 }
ganlikun 0:13413ea9a877 69 #endif
ganlikun 0:13413ea9a877 70 #if defined(TIM4_BASE)
ganlikun 0:13413ea9a877 71 if (obj->pwm == PWM_4) {
ganlikun 0:13413ea9a877 72 __HAL_RCC_TIM4_CLK_ENABLE();
ganlikun 0:13413ea9a877 73 }
ganlikun 0:13413ea9a877 74 #endif
ganlikun 0:13413ea9a877 75 #if defined(TIM5_BASE)
ganlikun 0:13413ea9a877 76 if (obj->pwm == PWM_5) {
ganlikun 0:13413ea9a877 77 __HAL_RCC_TIM5_CLK_ENABLE();
ganlikun 0:13413ea9a877 78 }
ganlikun 0:13413ea9a877 79 #endif
ganlikun 0:13413ea9a877 80 #if defined(TIM8_BASE)
ganlikun 0:13413ea9a877 81 if (obj->pwm == PWM_8) {
ganlikun 0:13413ea9a877 82 __HAL_RCC_TIM8_CLK_ENABLE();
ganlikun 0:13413ea9a877 83 }
ganlikun 0:13413ea9a877 84 #endif
ganlikun 0:13413ea9a877 85 #if defined(TIM9_BASE)
ganlikun 0:13413ea9a877 86 if (obj->pwm == PWM_9) {
ganlikun 0:13413ea9a877 87 __HAL_RCC_TIM9_CLK_ENABLE();
ganlikun 0:13413ea9a877 88 }
ganlikun 0:13413ea9a877 89 #endif
ganlikun 0:13413ea9a877 90 #if defined(TIM10_BASE)
ganlikun 0:13413ea9a877 91 if (obj->pwm == PWM_10) {
ganlikun 0:13413ea9a877 92 __HAL_RCC_TIM10_CLK_ENABLE();
ganlikun 0:13413ea9a877 93 }
ganlikun 0:13413ea9a877 94 #endif
ganlikun 0:13413ea9a877 95 #if defined(TIM11_BASE)
ganlikun 0:13413ea9a877 96 if (obj->pwm == PWM_11) {
ganlikun 0:13413ea9a877 97 __HAL_RCC_TIM11_CLK_ENABLE();
ganlikun 0:13413ea9a877 98 }
ganlikun 0:13413ea9a877 99 #endif
ganlikun 0:13413ea9a877 100 #if defined(TIM12_BASE)
ganlikun 0:13413ea9a877 101 if (obj->pwm == PWM_12) {
ganlikun 0:13413ea9a877 102 __HAL_RCC_TIM12_CLK_ENABLE();
ganlikun 0:13413ea9a877 103 }
ganlikun 0:13413ea9a877 104 #endif
ganlikun 0:13413ea9a877 105 #if defined(TIM13_BASE)
ganlikun 0:13413ea9a877 106 if (obj->pwm == PWM_13) {
ganlikun 0:13413ea9a877 107 __HAL_RCC_TIM13_CLK_ENABLE();
ganlikun 0:13413ea9a877 108 }
ganlikun 0:13413ea9a877 109 #endif
ganlikun 0:13413ea9a877 110 #if defined(TIM14_BASE)
ganlikun 0:13413ea9a877 111 if (obj->pwm == PWM_14) {
ganlikun 0:13413ea9a877 112 __HAL_RCC_TIM14_CLK_ENABLE();
ganlikun 0:13413ea9a877 113 }
ganlikun 0:13413ea9a877 114 #endif
ganlikun 0:13413ea9a877 115 #if defined(TIM15_BASE)
ganlikun 0:13413ea9a877 116 if (obj->pwm == PWM_15) {
ganlikun 0:13413ea9a877 117 __HAL_RCC_TIM15_CLK_ENABLE();
ganlikun 0:13413ea9a877 118 }
ganlikun 0:13413ea9a877 119 #endif
ganlikun 0:13413ea9a877 120 #if defined(TIM16_BASE)
ganlikun 0:13413ea9a877 121 if (obj->pwm == PWM_16) {
ganlikun 0:13413ea9a877 122 __HAL_RCC_TIM16_CLK_ENABLE();
ganlikun 0:13413ea9a877 123 }
ganlikun 0:13413ea9a877 124 #endif
ganlikun 0:13413ea9a877 125 #if defined(TIM17_BASE)
ganlikun 0:13413ea9a877 126 if (obj->pwm == PWM_17) {
ganlikun 0:13413ea9a877 127 __HAL_RCC_TIM17_CLK_ENABLE();
ganlikun 0:13413ea9a877 128 }
ganlikun 0:13413ea9a877 129 #endif
ganlikun 0:13413ea9a877 130 #if defined(TIM18_BASE)
ganlikun 0:13413ea9a877 131 if (obj->pwm == PWM_18) {
ganlikun 0:13413ea9a877 132 __HAL_RCC_TIM18_CLK_ENABLE();
ganlikun 0:13413ea9a877 133 }
ganlikun 0:13413ea9a877 134 #endif
ganlikun 0:13413ea9a877 135 #if defined(TIM19_BASE)
ganlikun 0:13413ea9a877 136 if (obj->pwm == PWM_19) {
ganlikun 0:13413ea9a877 137 __HAL_RCC_TIM19_CLK_ENABLE();
ganlikun 0:13413ea9a877 138 }
ganlikun 0:13413ea9a877 139 #endif
ganlikun 0:13413ea9a877 140 #if defined(TIM20_BASE)
ganlikun 0:13413ea9a877 141 if (obj->pwm == PWM_20) {
ganlikun 0:13413ea9a877 142 __HAL_RCC_TIM20_CLK_ENABLE();
ganlikun 0:13413ea9a877 143 }
ganlikun 0:13413ea9a877 144 #endif
ganlikun 0:13413ea9a877 145 #if defined(TIM21_BASE)
ganlikun 0:13413ea9a877 146 if (obj->pwm == PWM_21) {
ganlikun 0:13413ea9a877 147 __HAL_RCC_TIM21_CLK_ENABLE();
ganlikun 0:13413ea9a877 148 }
ganlikun 0:13413ea9a877 149 #endif
ganlikun 0:13413ea9a877 150 #if defined(TIM22_BASE)
ganlikun 0:13413ea9a877 151 if (obj->pwm == PWM_22) {
ganlikun 0:13413ea9a877 152 __HAL_RCC_TIM22_CLK_ENABLE();
ganlikun 0:13413ea9a877 153 }
ganlikun 0:13413ea9a877 154 #endif
ganlikun 0:13413ea9a877 155 // Configure GPIO
ganlikun 0:13413ea9a877 156 pinmap_pinout(pin, PinMap_PWM);
ganlikun 0:13413ea9a877 157
ganlikun 0:13413ea9a877 158 obj->pin = pin;
ganlikun 0:13413ea9a877 159 obj->period = 0;
ganlikun 0:13413ea9a877 160 obj->pulse = 0;
ganlikun 0:13413ea9a877 161 obj->prescaler = 1;
ganlikun 0:13413ea9a877 162
ganlikun 0:13413ea9a877 163 pwmout_period_us(obj, 20000); // 20 ms per default
ganlikun 0:13413ea9a877 164 }
ganlikun 0:13413ea9a877 165
ganlikun 0:13413ea9a877 166 void pwmout_free(pwmout_t* obj)
ganlikun 0:13413ea9a877 167 {
ganlikun 0:13413ea9a877 168 // Configure GPIO
ganlikun 0:13413ea9a877 169 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
ganlikun 0:13413ea9a877 170 }
ganlikun 0:13413ea9a877 171
ganlikun 0:13413ea9a877 172 void pwmout_write(pwmout_t* obj, float value)
ganlikun 0:13413ea9a877 173 {
ganlikun 0:13413ea9a877 174 TIM_OC_InitTypeDef sConfig;
ganlikun 0:13413ea9a877 175 int channel = 0;
ganlikun 0:13413ea9a877 176
ganlikun 0:13413ea9a877 177 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ganlikun 0:13413ea9a877 178
ganlikun 0:13413ea9a877 179 if (value < (float)0.0) {
ganlikun 0:13413ea9a877 180 value = 0.0;
ganlikun 0:13413ea9a877 181 } else if (value > (float)1.0) {
ganlikun 0:13413ea9a877 182 value = 1.0;
ganlikun 0:13413ea9a877 183 }
ganlikun 0:13413ea9a877 184
ganlikun 0:13413ea9a877 185 obj->pulse = (uint32_t)((float)obj->period * value);
ganlikun 0:13413ea9a877 186
ganlikun 0:13413ea9a877 187 // Configure channels
ganlikun 0:13413ea9a877 188 sConfig.OCMode = TIM_OCMODE_PWM1;
ganlikun 0:13413ea9a877 189 sConfig.Pulse = obj->pulse / obj->prescaler;
ganlikun 0:13413ea9a877 190 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
ganlikun 0:13413ea9a877 191 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
ganlikun 0:13413ea9a877 192 #if defined(TIM_OCIDLESTATE_RESET)
ganlikun 0:13413ea9a877 193 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
ganlikun 0:13413ea9a877 194 #endif
ganlikun 0:13413ea9a877 195 #if defined(TIM_OCNIDLESTATE_RESET)
ganlikun 0:13413ea9a877 196 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
ganlikun 0:13413ea9a877 197 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
ganlikun 0:13413ea9a877 198 #endif
ganlikun 0:13413ea9a877 199
ganlikun 0:13413ea9a877 200 switch (obj->channel) {
ganlikun 0:13413ea9a877 201 case 1:
ganlikun 0:13413ea9a877 202 channel = TIM_CHANNEL_1;
ganlikun 0:13413ea9a877 203 break;
ganlikun 0:13413ea9a877 204 case 2:
ganlikun 0:13413ea9a877 205 channel = TIM_CHANNEL_2;
ganlikun 0:13413ea9a877 206 break;
ganlikun 0:13413ea9a877 207 case 3:
ganlikun 0:13413ea9a877 208 channel = TIM_CHANNEL_3;
ganlikun 0:13413ea9a877 209 break;
ganlikun 0:13413ea9a877 210 case 4:
ganlikun 0:13413ea9a877 211 channel = TIM_CHANNEL_4;
ganlikun 0:13413ea9a877 212 break;
ganlikun 0:13413ea9a877 213 default:
ganlikun 0:13413ea9a877 214 return;
ganlikun 0:13413ea9a877 215 }
ganlikun 0:13413ea9a877 216
ganlikun 0:13413ea9a877 217 if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
ganlikun 0:13413ea9a877 218 error("Cannot initialize PWM\n");
ganlikun 0:13413ea9a877 219 }
ganlikun 0:13413ea9a877 220
ganlikun 0:13413ea9a877 221 #if !defined(PWMOUT_INVERTED_NOT_SUPPORTED)
ganlikun 0:13413ea9a877 222 if (obj->inverted) {
ganlikun 0:13413ea9a877 223 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
ganlikun 0:13413ea9a877 224 } else
ganlikun 0:13413ea9a877 225 #endif
ganlikun 0:13413ea9a877 226 {
ganlikun 0:13413ea9a877 227 HAL_TIM_PWM_Start(&TimHandle, channel);
ganlikun 0:13413ea9a877 228 }
ganlikun 0:13413ea9a877 229 }
ganlikun 0:13413ea9a877 230
ganlikun 0:13413ea9a877 231 float pwmout_read(pwmout_t* obj)
ganlikun 0:13413ea9a877 232 {
ganlikun 0:13413ea9a877 233 float value = 0;
ganlikun 0:13413ea9a877 234 if (obj->period > 0) {
ganlikun 0:13413ea9a877 235 value = (float)(obj->pulse) / (float)(obj->period);
ganlikun 0:13413ea9a877 236 }
ganlikun 0:13413ea9a877 237 return ((value > (float)1.0) ? (float)(1.0) : (value));
ganlikun 0:13413ea9a877 238 }
ganlikun 0:13413ea9a877 239
ganlikun 0:13413ea9a877 240 void pwmout_period(pwmout_t* obj, float seconds)
ganlikun 0:13413ea9a877 241 {
ganlikun 0:13413ea9a877 242 pwmout_period_us(obj, seconds * 1000000.0f);
ganlikun 0:13413ea9a877 243 }
ganlikun 0:13413ea9a877 244
ganlikun 0:13413ea9a877 245 void pwmout_period_ms(pwmout_t* obj, int ms)
ganlikun 0:13413ea9a877 246 {
ganlikun 0:13413ea9a877 247 pwmout_period_us(obj, ms * 1000);
ganlikun 0:13413ea9a877 248 }
ganlikun 0:13413ea9a877 249
ganlikun 0:13413ea9a877 250 void pwmout_period_us(pwmout_t* obj, int us)
ganlikun 0:13413ea9a877 251 {
ganlikun 0:13413ea9a877 252 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ganlikun 0:13413ea9a877 253 RCC_ClkInitTypeDef RCC_ClkInitStruct;
ganlikun 0:13413ea9a877 254 uint32_t PclkFreq = 0;
ganlikun 0:13413ea9a877 255 uint32_t APBxCLKDivider = RCC_HCLK_DIV1;
ganlikun 0:13413ea9a877 256 float dc = pwmout_read(obj);
ganlikun 0:13413ea9a877 257 uint8_t i = 0;
ganlikun 0:13413ea9a877 258
ganlikun 0:13413ea9a877 259 __HAL_TIM_DISABLE(&TimHandle);
ganlikun 0:13413ea9a877 260
ganlikun 0:13413ea9a877 261 // Get clock configuration
ganlikun 0:13413ea9a877 262 // Note: PclkFreq contains here the Latency (not used after)
ganlikun 0:13413ea9a877 263 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
ganlikun 0:13413ea9a877 264
ganlikun 0:13413ea9a877 265 /* Parse the pwm / apb mapping table to find the right entry */
ganlikun 0:13413ea9a877 266 while(pwm_apb_map_table[i].pwm != obj->pwm) {
ganlikun 0:13413ea9a877 267 i++;
ganlikun 0:13413ea9a877 268 }
ganlikun 0:13413ea9a877 269
ganlikun 0:13413ea9a877 270 if(pwm_apb_map_table[i].pwm == 0)
ganlikun 0:13413ea9a877 271 error("Unknown PWM instance");
ganlikun 0:13413ea9a877 272
ganlikun 0:13413ea9a877 273 if(pwm_apb_map_table[i].pwmoutApb == PWMOUT_ON_APB1) {
ganlikun 0:13413ea9a877 274 PclkFreq = HAL_RCC_GetPCLK1Freq();
ganlikun 0:13413ea9a877 275 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
ganlikun 0:13413ea9a877 276 } else {
ganlikun 0:13413ea9a877 277 #if !defined(PWMOUT_APB2_NOT_SUPPORTED)
ganlikun 0:13413ea9a877 278 PclkFreq = HAL_RCC_GetPCLK2Freq();
ganlikun 0:13413ea9a877 279 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
ganlikun 0:13413ea9a877 280 #endif
ganlikun 0:13413ea9a877 281 }
ganlikun 0:13413ea9a877 282
ganlikun 0:13413ea9a877 283
ganlikun 0:13413ea9a877 284 /* By default use, 1us as SW pre-scaler */
ganlikun 0:13413ea9a877 285 obj->prescaler = 1;
ganlikun 0:13413ea9a877 286 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
ganlikun 0:13413ea9a877 287 if (APBxCLKDivider == RCC_HCLK_DIV1) {
ganlikun 0:13413ea9a877 288 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000)) - 1; // 1 us tick
ganlikun 0:13413ea9a877 289 } else {
ganlikun 0:13413ea9a877 290 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000)) - 1; // 1 us tick
ganlikun 0:13413ea9a877 291 }
ganlikun 0:13413ea9a877 292 TimHandle.Init.Period = (us - 1);
ganlikun 0:13413ea9a877 293
ganlikun 0:13413ea9a877 294 /* In case period or pre-scalers are out of range, loop-in to get valid values */
ganlikun 0:13413ea9a877 295 while ((TimHandle.Init.Period > 0xFFFF) || (TimHandle.Init.Prescaler > 0xFFFF)) {
ganlikun 0:13413ea9a877 296 obj->prescaler = obj->prescaler * 2;
ganlikun 0:13413ea9a877 297 if (APBxCLKDivider == RCC_HCLK_DIV1) {
ganlikun 0:13413ea9a877 298 TimHandle.Init.Prescaler = (((PclkFreq) / 1000000) * obj->prescaler) - 1;
ganlikun 0:13413ea9a877 299 } else {
ganlikun 0:13413ea9a877 300 TimHandle.Init.Prescaler = (((PclkFreq * 2) / 1000000) * obj->prescaler) - 1;
ganlikun 0:13413ea9a877 301 }
ganlikun 0:13413ea9a877 302 TimHandle.Init.Period = (us - 1) / obj->prescaler;
ganlikun 0:13413ea9a877 303 /* Period decreases and prescaler increases over loops, so check for
ganlikun 0:13413ea9a877 304 * possible out of range cases */
ganlikun 0:13413ea9a877 305 if ((TimHandle.Init.Period < 0xFFFF) && (TimHandle.Init.Prescaler > 0xFFFF)) {
ganlikun 0:13413ea9a877 306 error("Cannot initialize PWM\n");
ganlikun 0:13413ea9a877 307 break;
ganlikun 0:13413ea9a877 308 }
ganlikun 0:13413ea9a877 309 }
ganlikun 0:13413ea9a877 310
ganlikun 0:13413ea9a877 311 TimHandle.Init.ClockDivision = 0;
ganlikun 0:13413ea9a877 312 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
ganlikun 0:13413ea9a877 313
ganlikun 0:13413ea9a877 314 if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
ganlikun 0:13413ea9a877 315 error("Cannot initialize PWM\n");
ganlikun 0:13413ea9a877 316 }
ganlikun 0:13413ea9a877 317
ganlikun 0:13413ea9a877 318 // Save for future use
ganlikun 0:13413ea9a877 319 obj->period = us;
ganlikun 0:13413ea9a877 320
ganlikun 0:13413ea9a877 321 // Set duty cycle again
ganlikun 0:13413ea9a877 322 pwmout_write(obj, dc);
ganlikun 0:13413ea9a877 323
ganlikun 0:13413ea9a877 324 __HAL_TIM_ENABLE(&TimHandle);
ganlikun 0:13413ea9a877 325 }
ganlikun 0:13413ea9a877 326
ganlikun 0:13413ea9a877 327 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
ganlikun 0:13413ea9a877 328 {
ganlikun 0:13413ea9a877 329 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
ganlikun 0:13413ea9a877 330 }
ganlikun 0:13413ea9a877 331
ganlikun 0:13413ea9a877 332 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
ganlikun 0:13413ea9a877 333 {
ganlikun 0:13413ea9a877 334 pwmout_pulsewidth_us(obj, ms * 1000);
ganlikun 0:13413ea9a877 335 }
ganlikun 0:13413ea9a877 336
ganlikun 0:13413ea9a877 337 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
ganlikun 0:13413ea9a877 338 {
ganlikun 0:13413ea9a877 339 float value = (float)us / (float)obj->period;
ganlikun 0:13413ea9a877 340 pwmout_write(obj, value);
ganlikun 0:13413ea9a877 341 }
ganlikun 0:13413ea9a877 342
ganlikun 0:13413ea9a877 343 #endif
ganlikun 0:13413ea9a877 344