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targets/hal/TARGET_STM/TARGET_STM32F7/pwmout_api.c@610:813dcc80987e, 2015-08-14 (annotated)

Committer:
mbed_official
Date:
Fri Aug 14 13:15:17 2015 +0100
Revision:
610:813dcc80987e
Parent:
596:abfb2833c9f5 
Synchronized with git revision 6d84db41c6833e0b9b024741eb0616a5f62d5599



Full URL: https://github.com/mbedmicro/mbed/commit/6d84db41c6833e0b9b024741eb0616a5f62d5599/



DISCO_F746NG - Improvements

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 573:ad23fe03a082 1 /* mbed Microcontroller Library
mbed_official 573:ad23fe03a082 2 *******************************************************************************
mbed_official 573:ad23fe03a082 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 573:ad23fe03a082 4 * All rights reserved.
mbed_official 573:ad23fe03a082 5 *
mbed_official 573:ad23fe03a082 6 * Redistribution and use in source and binary forms, with or without
mbed_official 573:ad23fe03a082 7 * modification, are permitted provided that the following conditions are met:
mbed_official 573:ad23fe03a082 8 *
mbed_official 573:ad23fe03a082 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 573:ad23fe03a082 10 * this list of conditions and the following disclaimer.
mbed_official 573:ad23fe03a082 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 573:ad23fe03a082 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 573:ad23fe03a082 13 * and/or other materials provided with the distribution.
mbed_official 573:ad23fe03a082 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 573:ad23fe03a082 15 * may be used to endorse or promote products derived from this software
mbed_official 573:ad23fe03a082 16 * without specific prior written permission.
mbed_official 573:ad23fe03a082 17 *
mbed_official 573:ad23fe03a082 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 573:ad23fe03a082 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 573:ad23fe03a082 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 573:ad23fe03a082 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 573:ad23fe03a082 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 573:ad23fe03a082 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 573:ad23fe03a082 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 573:ad23fe03a082 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 573:ad23fe03a082 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 573:ad23fe03a082 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 573:ad23fe03a082 28 *******************************************************************************
mbed_official 573:ad23fe03a082 29 */
mbed_official 573:ad23fe03a082 30 #include "pwmout_api.h"
mbed_official 573:ad23fe03a082 31
mbed_official 573:ad23fe03a082 32 #if DEVICE_PWMOUT
mbed_official 573:ad23fe03a082 33
mbed_official 573:ad23fe03a082 34 #include "cmsis.h"
mbed_official 573:ad23fe03a082 35 #include "pinmap.h"
mbed_official 573:ad23fe03a082 36 #include "mbed_error.h"
mbed_official 573:ad23fe03a082 37 #include "PeripheralPins.h"
mbed_official 573:ad23fe03a082 38
mbed_official 573:ad23fe03a082 39 static TIM_HandleTypeDef TimHandle;
mbed_official 573:ad23fe03a082 40
mbed_official 573:ad23fe03a082 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 573:ad23fe03a082 42 {
mbed_official 573:ad23fe03a082 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 573:ad23fe03a082 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 610:813dcc80987e 45 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 573:ad23fe03a082 46
mbed_official 573:ad23fe03a082 47 // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object
mbed_official 573:ad23fe03a082 48 uint32_t function = pinmap_function(pin, PinMap_PWM);
mbed_official 573:ad23fe03a082 49 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 610:813dcc80987e 50 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 573:ad23fe03a082 51 obj->inverted = STM_PIN_INVERTED(function);
mbed_official 573:ad23fe03a082 52
mbed_official 573:ad23fe03a082 53 // Enable TIM clock
mbed_official 610:813dcc80987e 54 if (obj->pwm == PWM_1) __HAL_RCC_TIM1_CLK_ENABLE();
mbed_official 610:813dcc80987e 55 if (obj->pwm == PWM_2) __HAL_RCC_TIM2_CLK_ENABLE();
mbed_official 610:813dcc80987e 56 if (obj->pwm == PWM_3) __HAL_RCC_TIM3_CLK_ENABLE();
mbed_official 610:813dcc80987e 57 if (obj->pwm == PWM_4) __HAL_RCC_TIM4_CLK_ENABLE();
mbed_official 610:813dcc80987e 58 if (obj->pwm == PWM_8) __HAL_RCC_TIM8_CLK_ENABLE();
mbed_official 610:813dcc80987e 59 if (obj->pwm == PWM_9) __HAL_RCC_TIM9_CLK_ENABLE();
mbed_official 582:a89625bcd809 60 if (obj->pwm == PWM_10) __HAL_RCC_TIM10_CLK_ENABLE();
mbed_official 582:a89625bcd809 61 if (obj->pwm == PWM_11) __HAL_RCC_TIM11_CLK_ENABLE();
mbed_official 596:abfb2833c9f5 62 if (obj->pwm == PWM_12) __HAL_RCC_TIM12_CLK_ENABLE();
mbed_official 582:a89625bcd809 63 if (obj->pwm == PWM_13) __HAL_RCC_TIM13_CLK_ENABLE();
mbed_official 582:a89625bcd809 64 if (obj->pwm == PWM_14) __HAL_RCC_TIM14_CLK_ENABLE();
mbed_official 573:ad23fe03a082 65
mbed_official 573:ad23fe03a082 66 // Configure GPIO
mbed_official 573:ad23fe03a082 67 pinmap_pinout(pin, PinMap_PWM);
mbed_official 573:ad23fe03a082 68
mbed_official 573:ad23fe03a082 69 obj->pin = pin;
mbed_official 573:ad23fe03a082 70 obj->period = 0;
mbed_official 573:ad23fe03a082 71 obj->pulse = 0;
mbed_official 573:ad23fe03a082 72
mbed_official 573:ad23fe03a082 73 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 573:ad23fe03a082 74 }
mbed_official 573:ad23fe03a082 75
mbed_official 573:ad23fe03a082 76 void pwmout_free(pwmout_t* obj)
mbed_official 573:ad23fe03a082 77 {
mbed_official 573:ad23fe03a082 78 // Configure GPIO
mbed_official 573:ad23fe03a082 79 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 573:ad23fe03a082 80 }
mbed_official 573:ad23fe03a082 81
mbed_official 573:ad23fe03a082 82 void pwmout_write(pwmout_t* obj, float value)
mbed_official 573:ad23fe03a082 83 {
mbed_official 573:ad23fe03a082 84 TIM_OC_InitTypeDef sConfig;
mbed_official 573:ad23fe03a082 85 int channel = 0;
mbed_official 573:ad23fe03a082 86
mbed_official 573:ad23fe03a082 87 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 573:ad23fe03a082 88
mbed_official 573:ad23fe03a082 89 if (value < (float)0.0) {
mbed_official 573:ad23fe03a082 90 value = 0.0;
mbed_official 573:ad23fe03a082 91 } else if (value > (float)1.0) {
mbed_official 573:ad23fe03a082 92 value = 1.0;
mbed_official 573:ad23fe03a082 93 }
mbed_official 573:ad23fe03a082 94
mbed_official 573:ad23fe03a082 95 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 573:ad23fe03a082 96
mbed_official 573:ad23fe03a082 97 // Configure channels
mbed_official 573:ad23fe03a082 98 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 573:ad23fe03a082 99 sConfig.Pulse = obj->pulse;
mbed_official 573:ad23fe03a082 100 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 573:ad23fe03a082 101 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 573:ad23fe03a082 102 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 573:ad23fe03a082 103 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 573:ad23fe03a082 104 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 573:ad23fe03a082 105
mbed_official 573:ad23fe03a082 106 switch (obj->channel) {
mbed_official 573:ad23fe03a082 107 case 1:
mbed_official 573:ad23fe03a082 108 channel = TIM_CHANNEL_1;
mbed_official 573:ad23fe03a082 109 break;
mbed_official 573:ad23fe03a082 110 case 2:
mbed_official 573:ad23fe03a082 111 channel = TIM_CHANNEL_2;
mbed_official 573:ad23fe03a082 112 break;
mbed_official 573:ad23fe03a082 113 case 3:
mbed_official 573:ad23fe03a082 114 channel = TIM_CHANNEL_3;
mbed_official 573:ad23fe03a082 115 break;
mbed_official 573:ad23fe03a082 116 case 4:
mbed_official 573:ad23fe03a082 117 channel = TIM_CHANNEL_4;
mbed_official 573:ad23fe03a082 118 break;
mbed_official 573:ad23fe03a082 119 default:
mbed_official 573:ad23fe03a082 120 return;
mbed_official 573:ad23fe03a082 121 }
mbed_official 573:ad23fe03a082 122
mbed_official 582:a89625bcd809 123 if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
mbed_official 610:813dcc80987e 124 error("Cannot configure PWM channel\n");
mbed_official 582:a89625bcd809 125 }
mbed_official 582:a89625bcd809 126
mbed_official 582:a89625bcd809 127 if (obj->inverted) {
mbed_official 573:ad23fe03a082 128 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 573:ad23fe03a082 129 } else {
mbed_official 573:ad23fe03a082 130 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 573:ad23fe03a082 131 }
mbed_official 573:ad23fe03a082 132 }
mbed_official 573:ad23fe03a082 133
mbed_official 573:ad23fe03a082 134 float pwmout_read(pwmout_t* obj)
mbed_official 573:ad23fe03a082 135 {
mbed_official 573:ad23fe03a082 136 float value = 0;
mbed_official 573:ad23fe03a082 137 if (obj->period > 0) {
mbed_official 573:ad23fe03a082 138 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 573:ad23fe03a082 139 }
mbed_official 573:ad23fe03a082 140 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 573:ad23fe03a082 141 }
mbed_official 573:ad23fe03a082 142
mbed_official 573:ad23fe03a082 143 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 573:ad23fe03a082 144 {
mbed_official 573:ad23fe03a082 145 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 573:ad23fe03a082 146 }
mbed_official 573:ad23fe03a082 147
mbed_official 573:ad23fe03a082 148 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 573:ad23fe03a082 149 {
mbed_official 573:ad23fe03a082 150 pwmout_period_us(obj, ms * 1000);
mbed_official 573:ad23fe03a082 151 }
mbed_official 573:ad23fe03a082 152
mbed_official 573:ad23fe03a082 153 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 573:ad23fe03a082 154 {
mbed_official 573:ad23fe03a082 155 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 610:813dcc80987e 156 RCC_ClkInitTypeDef RCC_ClkInitStruct;
mbed_official 573:ad23fe03a082 157 uint32_t PclkFreq;
mbed_official 610:813dcc80987e 158 uint32_t APBxCLKDivider;
mbed_official 573:ad23fe03a082 159 float dc = pwmout_read(obj);
mbed_official 573:ad23fe03a082 160
mbed_official 573:ad23fe03a082 161 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 573:ad23fe03a082 162
mbed_official 610:813dcc80987e 163 // Get clock configuration
mbed_official 610:813dcc80987e 164 // Note: PclkFreq contains here the Latency (not used after)
mbed_official 610:813dcc80987e 165 HAL_RCC_GetClockConfig(&RCC_ClkInitStruct, &PclkFreq);
mbed_official 610:813dcc80987e 166
mbed_official 610:813dcc80987e 167 // Get the PCLK and APBCLK divider related to the timer
mbed_official 573:ad23fe03a082 168 switch (obj->pwm) {
mbed_official 610:813dcc80987e 169
mbed_official 610:813dcc80987e 170 // APB1 clock
mbed_official 573:ad23fe03a082 171 case PWM_2:
mbed_official 573:ad23fe03a082 172 case PWM_3:
mbed_official 573:ad23fe03a082 173 case PWM_4:
mbed_official 582:a89625bcd809 174 case PWM_5:
mbed_official 582:a89625bcd809 175 case PWM_12:
mbed_official 582:a89625bcd809 176 case PWM_13:
mbed_official 582:a89625bcd809 177 case PWM_14:
mbed_official 582:a89625bcd809 178 PclkFreq = HAL_RCC_GetPCLK1Freq();
mbed_official 610:813dcc80987e 179 APBxCLKDivider = RCC_ClkInitStruct.APB1CLKDivider;
mbed_official 573:ad23fe03a082 180 break;
mbed_official 610:813dcc80987e 181
mbed_official 610:813dcc80987e 182 // APB2 clock
mbed_official 582:a89625bcd809 183 case PWM_1:
mbed_official 582:a89625bcd809 184 case PWM_8:
mbed_official 573:ad23fe03a082 185 case PWM_9:
mbed_official 573:ad23fe03a082 186 case PWM_10:
mbed_official 573:ad23fe03a082 187 case PWM_11:
mbed_official 582:a89625bcd809 188 PclkFreq = HAL_RCC_GetPCLK2Freq();
mbed_official 610:813dcc80987e 189 APBxCLKDivider = RCC_ClkInitStruct.APB2CLKDivider;
mbed_official 573:ad23fe03a082 190 break;
mbed_official 573:ad23fe03a082 191 default:
mbed_official 573:ad23fe03a082 192 return;
mbed_official 573:ad23fe03a082 193 }
mbed_official 573:ad23fe03a082 194
mbed_official 573:ad23fe03a082 195 TimHandle.Init.Period = us - 1;
mbed_official 610:813dcc80987e 196 // TIMxCLK = PCLKx when the APB prescaler = 1 else TIMxCLK = 2 * PCLKx
mbed_official 610:813dcc80987e 197 if (APBxCLKDivider == RCC_HCLK_DIV1)
mbed_official 610:813dcc80987e 198 TimHandle.Init.Prescaler = (uint16_t)((PclkFreq) / 1000000) - 1; // 1 µs tick
mbed_official 610:813dcc80987e 199 else
mbed_official 610:813dcc80987e 200 TimHandle.Init.Prescaler = (uint16_t)((PclkFreq * 2) / 1000000) - 1; // 1 µs tick
mbed_official 573:ad23fe03a082 201 TimHandle.Init.ClockDivision = 0;
mbed_official 573:ad23fe03a082 202 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 582:a89625bcd809 203
mbed_official 582:a89625bcd809 204 if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
mbed_official 610:813dcc80987e 205 error("Cannot initialize PWM\n");
mbed_official 582:a89625bcd809 206 }
mbed_official 573:ad23fe03a082 207
mbed_official 573:ad23fe03a082 208 // Set duty cycle again
mbed_official 573:ad23fe03a082 209 pwmout_write(obj, dc);
mbed_official 573:ad23fe03a082 210
mbed_official 573:ad23fe03a082 211 // Save for future use
mbed_official 573:ad23fe03a082 212 obj->period = us;
mbed_official 573:ad23fe03a082 213
mbed_official 573:ad23fe03a082 214 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 573:ad23fe03a082 215 }
mbed_official 573:ad23fe03a082 216
mbed_official 573:ad23fe03a082 217 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 573:ad23fe03a082 218 {
mbed_official 573:ad23fe03a082 219 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 573:ad23fe03a082 220 }
mbed_official 573:ad23fe03a082 221
mbed_official 573:ad23fe03a082 222 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 573:ad23fe03a082 223 {
mbed_official 573:ad23fe03a082 224 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 573:ad23fe03a082 225 }
mbed_official 573:ad23fe03a082 226
mbed_official 573:ad23fe03a082 227 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 573:ad23fe03a082 228 {
mbed_official 573:ad23fe03a082 229 float value = (float)us / (float)obj->period;
mbed_official 573:ad23fe03a082 230 pwmout_write(obj, value);
mbed_official 573:ad23fe03a082 231 }
mbed_official 573:ad23fe03a082 232
mbed_official 573:ad23fe03a082 233 #endif