sai kiran / mbed-src

Watchdog Timer

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c@606:ded2017be6ab, 2015-08-13 (annotated)

Committer:
mbed_official
Date:
Thu Aug 13 11:30:09 2015 +0100
Revision:
606:ded2017be6ab
Parent:
555:f8b0f61305ee
Child:
614:bc40b8d2aec4
Synchronized with git revision 163a66abdd17c224129f0199f6ed2f3c626cacab



Full URL: https://github.com/mbedmicro/mbed/commit/163a66abdd17c224129f0199f6ed2f3c626cacab/



STMF4 - pwmout_api.c freq fix

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /* mbed Microcontroller Library
mbed_official 340:28d1f895c6fe 2 *******************************************************************************
mbed_official 340:28d1f895c6fe 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 340:28d1f895c6fe 4 * All rights reserved.
mbed_official 340:28d1f895c6fe 5 *
mbed_official 340:28d1f895c6fe 6 * Redistribution and use in source and binary forms, with or without
mbed_official 340:28d1f895c6fe 7 * modification, are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 8 *
mbed_official 340:28d1f895c6fe 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 10 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 13 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 15 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 16 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 17 *
mbed_official 340:28d1f895c6fe 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 28 *******************************************************************************
mbed_official 340:28d1f895c6fe 29 */
mbed_official 340:28d1f895c6fe 30 #include "pwmout_api.h"
mbed_official 340:28d1f895c6fe 31
mbed_official 340:28d1f895c6fe 32 #if DEVICE_PWMOUT
mbed_official 340:28d1f895c6fe 33
mbed_official 340:28d1f895c6fe 34 #include "cmsis.h"
mbed_official 340:28d1f895c6fe 35 #include "pinmap.h"
mbed_official 340:28d1f895c6fe 36 #include "mbed_error.h"
mbed_official 428:4ddf7f7eabbb 37 #include "PeripheralPins.h"
mbed_official 340:28d1f895c6fe 38
mbed_official 340:28d1f895c6fe 39 static TIM_HandleTypeDef TimHandle;
mbed_official 340:28d1f895c6fe 40
mbed_official 340:28d1f895c6fe 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 340:28d1f895c6fe 42 {
mbed_official 340:28d1f895c6fe 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 340:28d1f895c6fe 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 45
mbed_official 511:532f83b66a7f 46 // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
mbed_official 511:532f83b66a7f 47 uint32_t function = pinmap_function(pin, PinMap_PWM);
mbed_official 511:532f83b66a7f 48 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 511:532f83b66a7f 49 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 511:532f83b66a7f 50 obj->inverted = STM_PIN_INVERTED(function);
mbed_official 511:532f83b66a7f 51
mbed_official 340:28d1f895c6fe 52 if (obj->pwm == (PWMName)NC) {
mbed_official 340:28d1f895c6fe 53 error("PWM error: pinout mapping failed.");
mbed_official 340:28d1f895c6fe 54 }
mbed_official 340:28d1f895c6fe 55
mbed_official 340:28d1f895c6fe 56 // Enable TIM clock
mbed_official 340:28d1f895c6fe 57 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 58 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 59 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 60 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 511:532f83b66a7f 61 #if defined(TIM8_BASE)
mbed_official 511:532f83b66a7f 62 if (obj->pwm == PWM_8) __TIM8_CLK_ENABLE();
mbed_official 511:532f83b66a7f 63 #endif
mbed_official 340:28d1f895c6fe 64 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 65 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 66 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 511:532f83b66a7f 67 #if defined(TIM13_BASE)
mbed_official 511:532f83b66a7f 68 if (obj->pwm == PWM_13) __TIM13_CLK_ENABLE();
mbed_official 511:532f83b66a7f 69 #endif
mbed_official 511:532f83b66a7f 70 #if defined(TIM14_BASE)
mbed_official 511:532f83b66a7f 71 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 511:532f83b66a7f 72 #endif
mbed_official 340:28d1f895c6fe 73
mbed_official 340:28d1f895c6fe 74 // Configure GPIO
mbed_official 340:28d1f895c6fe 75 pinmap_pinout(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 76
mbed_official 340:28d1f895c6fe 77 obj->pin = pin;
mbed_official 340:28d1f895c6fe 78 obj->period = 0;
mbed_official 340:28d1f895c6fe 79 obj->pulse = 0;
mbed_official 340:28d1f895c6fe 80
mbed_official 340:28d1f895c6fe 81 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 340:28d1f895c6fe 82 }
mbed_official 340:28d1f895c6fe 83
mbed_official 340:28d1f895c6fe 84 void pwmout_free(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 85 {
mbed_official 340:28d1f895c6fe 86 // Configure GPIO
mbed_official 340:28d1f895c6fe 87 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 340:28d1f895c6fe 88 }
mbed_official 340:28d1f895c6fe 89
mbed_official 340:28d1f895c6fe 90 void pwmout_write(pwmout_t* obj, float value)
mbed_official 340:28d1f895c6fe 91 {
mbed_official 340:28d1f895c6fe 92 TIM_OC_InitTypeDef sConfig;
mbed_official 340:28d1f895c6fe 93 int channel = 0;
mbed_official 340:28d1f895c6fe 94 int complementary_channel = 0;
mbed_official 340:28d1f895c6fe 95
mbed_official 340:28d1f895c6fe 96 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 340:28d1f895c6fe 97
mbed_official 340:28d1f895c6fe 98 if (value < (float)0.0) {
mbed_official 340:28d1f895c6fe 99 value = 0.0;
mbed_official 340:28d1f895c6fe 100 } else if (value > (float)1.0) {
mbed_official 340:28d1f895c6fe 101 value = 1.0;
mbed_official 340:28d1f895c6fe 102 }
mbed_official 340:28d1f895c6fe 103
mbed_official 340:28d1f895c6fe 104 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 340:28d1f895c6fe 105
mbed_official 340:28d1f895c6fe 106 // Configure channels
mbed_official 340:28d1f895c6fe 107 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 340:28d1f895c6fe 108 sConfig.Pulse = obj->pulse;
mbed_official 340:28d1f895c6fe 109 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 110 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 111 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 340:28d1f895c6fe 112 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 113 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 114
mbed_official 511:532f83b66a7f 115 complementary_channel = obj->inverted;
mbed_official 511:532f83b66a7f 116 switch (obj->channel) {
mbed_official 340:28d1f895c6fe 117
mbed_official 511:532f83b66a7f 118 case 1:
mbed_official 340:28d1f895c6fe 119 channel = TIM_CHANNEL_1;
mbed_official 340:28d1f895c6fe 120 break;
mbed_official 340:28d1f895c6fe 121
mbed_official 511:532f83b66a7f 122 case 2:
mbed_official 340:28d1f895c6fe 123 channel = TIM_CHANNEL_2;
mbed_official 340:28d1f895c6fe 124 break;
mbed_official 340:28d1f895c6fe 125
mbed_official 511:532f83b66a7f 126 case 3:
mbed_official 340:28d1f895c6fe 127 channel = TIM_CHANNEL_3;
mbed_official 340:28d1f895c6fe 128 break;
mbed_official 340:28d1f895c6fe 129
mbed_official 511:532f83b66a7f 130 case 4:
mbed_official 340:28d1f895c6fe 131 channel = TIM_CHANNEL_4;
mbed_official 340:28d1f895c6fe 132 break;
mbed_official 340:28d1f895c6fe 133
mbed_official 340:28d1f895c6fe 134 default:
mbed_official 340:28d1f895c6fe 135 return;
mbed_official 340:28d1f895c6fe 136 }
mbed_official 340:28d1f895c6fe 137
mbed_official 340:28d1f895c6fe 138 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 340:28d1f895c6fe 139 if (complementary_channel) {
mbed_official 340:28d1f895c6fe 140 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 141 } else {
mbed_official 340:28d1f895c6fe 142 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 143 }
mbed_official 340:28d1f895c6fe 144 }
mbed_official 340:28d1f895c6fe 145
mbed_official 340:28d1f895c6fe 146 float pwmout_read(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 147 {
mbed_official 340:28d1f895c6fe 148 float value = 0;
mbed_official 340:28d1f895c6fe 149 if (obj->period > 0) {
mbed_official 340:28d1f895c6fe 150 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 340:28d1f895c6fe 151 }
mbed_official 340:28d1f895c6fe 152 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 340:28d1f895c6fe 153 }
mbed_official 340:28d1f895c6fe 154
mbed_official 340:28d1f895c6fe 155 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 156 {
mbed_official 340:28d1f895c6fe 157 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 158 }
mbed_official 340:28d1f895c6fe 159
mbed_official 340:28d1f895c6fe 160 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 161 {
mbed_official 340:28d1f895c6fe 162 pwmout_period_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 163 }
mbed_official 340:28d1f895c6fe 164
mbed_official 340:28d1f895c6fe 165 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 166 {
mbed_official 340:28d1f895c6fe 167 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 555:f8b0f61305ee 168 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 555:f8b0f61305ee 169 uint32_t PclkFreq;
mbed_official 555:f8b0f61305ee 170 uint32_t APBxCLKDivider;
mbed_official 340:28d1f895c6fe 171 float dc = pwmout_read(obj);
mbed_official 340:28d1f895c6fe 172
mbed_official 340:28d1f895c6fe 173 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 174
mbed_official 340:28d1f895c6fe 175 // Update the SystemCoreClock variable
mbed_official 340:28d1f895c6fe 176 SystemCoreClockUpdate();
mbed_official 340:28d1f895c6fe 177
mbed_official 555:f8b0f61305ee 178 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
mbed_official 555:f8b0f61305ee 179
mbed_official 555:f8b0f61305ee 180 switch (obj->pwm) {
mbed_official 555:f8b0f61305ee 181
mbed_official 555:f8b0f61305ee 182 case PWM_1:
mbed_official 555:f8b0f61305ee 183 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 555:f8b0f61305ee 184 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 555:f8b0f61305ee 185 break;
mbed_official 555:f8b0f61305ee 186
mbed_official 555:f8b0f61305ee 187 case PWM_2:
mbed_official 555:f8b0f61305ee 188 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 555:f8b0f61305ee 189 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 555:f8b0f61305ee 190 break;
mbed_official 555:f8b0f61305ee 191
mbed_official 555:f8b0f61305ee 192 case PWM_3:
mbed_official 555:f8b0f61305ee 193 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 555:f8b0f61305ee 194 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 555:f8b0f61305ee 195 break;
mbed_official 555:f8b0f61305ee 196
mbed_official 555:f8b0f61305ee 197 case PWM_4:
mbed_official 555:f8b0f61305ee 198 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 555:f8b0f61305ee 199 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 555:f8b0f61305ee 200 break;
mbed_official 555:f8b0f61305ee 201
mbed_official 555:f8b0f61305ee 202 #if defined(TIM8_BASE)
mbed_official 555:f8b0f61305ee 203 case PWM_8:
mbed_official 555:f8b0f61305ee 204 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 555:f8b0f61305ee 205 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 555:f8b0f61305ee 206 break;
mbed_official 555:f8b0f61305ee 207 #endif
mbed_official 555:f8b0f61305ee 208
mbed_official 555:f8b0f61305ee 209 case PWM_9:
mbed_official 555:f8b0f61305ee 210 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 555:f8b0f61305ee 211 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 555:f8b0f61305ee 212 break;
mbed_official 555:f8b0f61305ee 213
mbed_official 555:f8b0f61305ee 214 case PWM_10:
mbed_official 555:f8b0f61305ee 215 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 555:f8b0f61305ee 216 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 555:f8b0f61305ee 217 break;
mbed_official 555:f8b0f61305ee 218
mbed_official 555:f8b0f61305ee 219 case PWM_11:
mbed_official 555:f8b0f61305ee 220 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 555:f8b0f61305ee 221 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 555:f8b0f61305ee 222 break;
mbed_official 555:f8b0f61305ee 223
mbed_official 555:f8b0f61305ee 224 #if defined(TIM13_BASE)
mbed_official 555:f8b0f61305ee 225 case PWM_13:
mbed_official 555:f8b0f61305ee 226 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 555:f8b0f61305ee 227 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 555:f8b0f61305ee 228 break;
mbed_official 555:f8b0f61305ee 229 #endif
mbed_official 555:f8b0f61305ee 230
mbed_official 555:f8b0f61305ee 231 #if defined(TIM14_BASE)
mbed_official 555:f8b0f61305ee 232 case PWM_14:
mbed_official 555:f8b0f61305ee 233 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 555:f8b0f61305ee 234 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 555:f8b0f61305ee 235 break;
mbed_official 555:f8b0f61305ee 236 #endif
mbed_official 555:f8b0f61305ee 237
mbed_official 555:f8b0f61305ee 238 default:
mbed_official 555:f8b0f61305ee 239 return;
mbed_official 555:f8b0f61305ee 240 }
mbed_official 555:f8b0f61305ee 241
mbed_official 340:28d1f895c6fe 242 TimHandle.Init.Period = us - 1;
mbed_official 555:f8b0f61305ee 243 if (APBxCLKDivider == RCC_HCLK_DIV1)
mbed_official 606:ded2017be6ab 244 TimHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 µs tick
mbed_official 555:f8b0f61305ee 245 else
mbed_official 606:ded2017be6ab 246 TimHandle.Init.Prescaler = (uint16_t)((PclkFreq)*2 / 1000000) - 1; // 1 µs tick
mbed_official 340:28d1f895c6fe 247 TimHandle.Init.ClockDivision = 0;
mbed_official 340:28d1f895c6fe 248 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 340:28d1f895c6fe 249 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 340:28d1f895c6fe 250
mbed_official 340:28d1f895c6fe 251 // Set duty cycle again
mbed_official 340:28d1f895c6fe 252 pwmout_write(obj, dc);
mbed_official 340:28d1f895c6fe 253
mbed_official 340:28d1f895c6fe 254 // Save for future use
mbed_official 340:28d1f895c6fe 255 obj->period = us;
mbed_official 340:28d1f895c6fe 256
mbed_official 340:28d1f895c6fe 257 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 258 }
mbed_official 340:28d1f895c6fe 259
mbed_official 340:28d1f895c6fe 260 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 261 {
mbed_official 340:28d1f895c6fe 262 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 263 }
mbed_official 340:28d1f895c6fe 264
mbed_official 340:28d1f895c6fe 265 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 266 {
mbed_official 340:28d1f895c6fe 267 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 268 }
mbed_official 340:28d1f895c6fe 269
mbed_official 340:28d1f895c6fe 270 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 271 {
mbed_official 340:28d1f895c6fe 272 float value = (float)us / (float)obj->period;
mbed_official 340:28d1f895c6fe 273 pwmout_write(obj, value);
mbed_official 340:28d1f895c6fe 274 }
mbed_official 340:28d1f895c6fe 275
mbed_official 340:28d1f895c6fe 276 #endif