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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/pwmout_api.c@440:8a0b45cd594f, 2014-12-16 (annotated)

Committer:
mbed_official
Date:
Tue Dec 16 08:15:08 2014 +0000
Revision:
440:8a0b45cd594f
Parent:
414:4ec4c5b614b0 
Synchronized with git revision 67fbbf0b635d0c0d93fbe433306c537c2ad206aa



Full URL: https://github.com/mbedmicro/mbed/commit/67fbbf0b635d0c0d93fbe433306c537c2ad206aa/



Targets: nrf51 - updating app_timer.c from Norid'c SDKv7.1.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include "pwmout_api.h"
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 #if DEVICE_PWMOUT
mbed_official 219:993c9b0acbcc 33
mbed_official 219:993c9b0acbcc 34 #include "cmsis.h"
mbed_official 219:993c9b0acbcc 35 #include "pinmap.h"
mbed_official 285:31249416b6f9 36 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 219:993c9b0acbcc 38
mbed_official 219:993c9b0acbcc 39 static TIM_HandleTypeDef TimHandle;
mbed_official 219:993c9b0acbcc 40
mbed_official 402:09075a3b15e3 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 42 {
mbed_official 219:993c9b0acbcc 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 45
mbed_official 219:993c9b0acbcc 46 if (obj->pwm == (PWMName)NC) {
mbed_official 219:993c9b0acbcc 47 error("PWM error: pinout mapping failed.");
mbed_official 219:993c9b0acbcc 48 }
mbed_official 219:993c9b0acbcc 49
mbed_official 219:993c9b0acbcc 50 // Enable TIM clock
mbed_official 219:993c9b0acbcc 51 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 52 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 53 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 54 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 55 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 56 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 57 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 58
mbed_official 219:993c9b0acbcc 59 // Configure GPIO
mbed_official 219:993c9b0acbcc 60 pinmap_pinout(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 61
mbed_official 219:993c9b0acbcc 62 obj->pin = pin;
mbed_official 219:993c9b0acbcc 63 obj->period = 0;
mbed_official 219:993c9b0acbcc 64 obj->pulse = 0;
mbed_official 219:993c9b0acbcc 65
mbed_official 219:993c9b0acbcc 66 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 219:993c9b0acbcc 67 }
mbed_official 219:993c9b0acbcc 68
mbed_official 402:09075a3b15e3 69 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 70 {
mbed_official 219:993c9b0acbcc 71 // Configure GPIO
mbed_official 219:993c9b0acbcc 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 73 }
mbed_official 219:993c9b0acbcc 74
mbed_official 402:09075a3b15e3 75 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 76 {
mbed_official 219:993c9b0acbcc 77 TIM_OC_InitTypeDef sConfig;
mbed_official 219:993c9b0acbcc 78 int channel = 0;
mbed_official 219:993c9b0acbcc 79 int complementary_channel = 0;
mbed_official 219:993c9b0acbcc 80
mbed_official 219:993c9b0acbcc 81 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 82
mbed_official 219:993c9b0acbcc 83 if (value < (float)0.0) {
mbed_official 219:993c9b0acbcc 84 value = 0.0;
mbed_official 219:993c9b0acbcc 85 } else if (value > (float)1.0) {
mbed_official 219:993c9b0acbcc 86 value = 1.0;
mbed_official 219:993c9b0acbcc 87 }
mbed_official 219:993c9b0acbcc 88
mbed_official 219:993c9b0acbcc 89 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 219:993c9b0acbcc 90
mbed_official 219:993c9b0acbcc 91 // Configure channels
mbed_official 219:993c9b0acbcc 92 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 219:993c9b0acbcc 93 sConfig.Pulse = obj->pulse;
mbed_official 219:993c9b0acbcc 94 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 95 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 96 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 219:993c9b0acbcc 97 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 98 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 99
mbed_official 219:993c9b0acbcc 100 switch (obj->pin) {
mbed_official 219:993c9b0acbcc 101 // Channels 1
mbed_official 219:993c9b0acbcc 102 case PA_2:
mbed_official 219:993c9b0acbcc 103 case PA_4:
mbed_official 219:993c9b0acbcc 104 case PA_6:
mbed_official 219:993c9b0acbcc 105 case PA_7:
mbed_official 219:993c9b0acbcc 106 case PA_8:
mbed_official 219:993c9b0acbcc 107 case PB_1:
mbed_official 219:993c9b0acbcc 108 case PB_4:
mbed_official 219:993c9b0acbcc 109 case PB_8:
mbed_official 219:993c9b0acbcc 110 case PB_9:
mbed_official 219:993c9b0acbcc 111 case PB_14:
mbed_official 219:993c9b0acbcc 112 case PC_6:
mbed_official 219:993c9b0acbcc 113 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 114 break;
mbed_official 219:993c9b0acbcc 115 // Channels 1N
mbed_official 219:993c9b0acbcc 116 case PA_1:
mbed_official 219:993c9b0acbcc 117 case PB_6:
mbed_official 219:993c9b0acbcc 118 case PB_7:
mbed_official 219:993c9b0acbcc 119 case PB_13:
mbed_official 219:993c9b0acbcc 120 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 121 complementary_channel = 1;
mbed_official 219:993c9b0acbcc 122 break;
mbed_official 219:993c9b0acbcc 123 // Channels 2
mbed_official 219:993c9b0acbcc 124 case PA_3:
mbed_official 219:993c9b0acbcc 125 case PA_9:
mbed_official 219:993c9b0acbcc 126 case PB_5:
mbed_official 219:993c9b0acbcc 127 case PB_15:
mbed_official 219:993c9b0acbcc 128 case PC_7:
mbed_official 219:993c9b0acbcc 129 channel = TIM_CHANNEL_2;
mbed_official 219:993c9b0acbcc 130 break;
mbed_official 219:993c9b0acbcc 131 // Channels 3
mbed_official 219:993c9b0acbcc 132 case PA_10:
mbed_official 219:993c9b0acbcc 133 case PB_0:
mbed_official 219:993c9b0acbcc 134 case PC_8:
mbed_official 219:993c9b0acbcc 135 channel = TIM_CHANNEL_3;
mbed_official 219:993c9b0acbcc 136 break;
mbed_official 219:993c9b0acbcc 137 // Channels 4
mbed_official 219:993c9b0acbcc 138 case PA_11:
mbed_official 219:993c9b0acbcc 139 case PC_9:
mbed_official 219:993c9b0acbcc 140 channel = TIM_CHANNEL_4;
mbed_official 219:993c9b0acbcc 141 break;
mbed_official 219:993c9b0acbcc 142 default:
mbed_official 219:993c9b0acbcc 143 return;
mbed_official 219:993c9b0acbcc 144 }
mbed_official 219:993c9b0acbcc 145
mbed_official 219:993c9b0acbcc 146 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 219:993c9b0acbcc 147
mbed_official 219:993c9b0acbcc 148 if (complementary_channel) {
mbed_official 219:993c9b0acbcc 149 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 150 } else {
mbed_official 219:993c9b0acbcc 151 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 152 }
mbed_official 219:993c9b0acbcc 153 }
mbed_official 219:993c9b0acbcc 154
mbed_official 402:09075a3b15e3 155 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 156 {
mbed_official 219:993c9b0acbcc 157 float value = 0;
mbed_official 219:993c9b0acbcc 158 if (obj->period > 0) {
mbed_official 219:993c9b0acbcc 159 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 219:993c9b0acbcc 160 }
mbed_official 219:993c9b0acbcc 161 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 219:993c9b0acbcc 162 }
mbed_official 219:993c9b0acbcc 163
mbed_official 402:09075a3b15e3 164 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 165 {
mbed_official 219:993c9b0acbcc 166 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 167 }
mbed_official 219:993c9b0acbcc 168
mbed_official 402:09075a3b15e3 169 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 170 {
mbed_official 219:993c9b0acbcc 171 pwmout_period_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 172 }
mbed_official 219:993c9b0acbcc 173
mbed_official 402:09075a3b15e3 174 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 175 {
mbed_official 219:993c9b0acbcc 176 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 177
mbed_official 219:993c9b0acbcc 178 float dc = pwmout_read(obj);
mbed_official 219:993c9b0acbcc 179
mbed_official 219:993c9b0acbcc 180 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 181
mbed_official 219:993c9b0acbcc 182 // Update the SystemCoreClock variable
mbed_official 219:993c9b0acbcc 183 SystemCoreClockUpdate();
mbed_official 219:993c9b0acbcc 184
mbed_official 219:993c9b0acbcc 185 TimHandle.Init.Period = us - 1;
mbed_official 219:993c9b0acbcc 186 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 219:993c9b0acbcc 187 TimHandle.Init.ClockDivision = 0;
mbed_official 219:993c9b0acbcc 188 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 219:993c9b0acbcc 189 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 219:993c9b0acbcc 190
mbed_official 219:993c9b0acbcc 191 // Set duty cycle again
mbed_official 219:993c9b0acbcc 192 pwmout_write(obj, dc);
mbed_official 219:993c9b0acbcc 193
mbed_official 219:993c9b0acbcc 194 // Save for future use
mbed_official 219:993c9b0acbcc 195 obj->period = us;
mbed_official 219:993c9b0acbcc 196
mbed_official 219:993c9b0acbcc 197 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 198 }
mbed_official 219:993c9b0acbcc 199
mbed_official 402:09075a3b15e3 200 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 201 {
mbed_official 219:993c9b0acbcc 202 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 203 }
mbed_official 219:993c9b0acbcc 204
mbed_official 402:09075a3b15e3 205 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 206 {
mbed_official 219:993c9b0acbcc 207 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 208 }
mbed_official 219:993c9b0acbcc 209
mbed_official 402:09075a3b15e3 210 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 211 {
mbed_official 219:993c9b0acbcc 212 float value = (float)us / (float)obj->period;
mbed_official 219:993c9b0acbcc 213 pwmout_write(obj, value);
mbed_official 219:993c9b0acbcc 214 }
mbed_official 219:993c9b0acbcc 215
mbed_official 219:993c9b0acbcc 216 #endif