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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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@402:09075a3b15e3, 2014-11-14 (annotated)

Committer:
mbed_official
Date:
Fri Nov 14 09:00:07 2014 +0000
Revision:
402:09075a3b15e3
Parent:
285:31249416b6f9
Child:
414:4ec4c5b614b0
Synchronized with git revision dffeedc96e731e30785ca4a7842fb9769412bea1



Full URL: https://github.com/mbedmicro/mbed/commit/dffeedc96e731e30785ca4a7842fb9769412bea1/



Targets: add USBTX and USBRX pin definitions for targets that don't provide them

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 219:993c9b0acbcc 37
mbed_official 219:993c9b0acbcc 38 // TIM2 cannot be used because already used by the us_ticker
mbed_official 219:993c9b0acbcc 39 static const PinMap PinMap_PWM[] = {
mbed_official 219:993c9b0acbcc 40 // {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2
mbed_official 219:993c9b0acbcc 41 {PA_1, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM15)}, // TIM15_CH1N
mbed_official 219:993c9b0acbcc 42 {PA_2, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM15)}, // TIM15_CH1
mbed_official 219:993c9b0acbcc 43 // {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3
mbed_official 219:993c9b0acbcc 44 {PA_3, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM15)}, // TIM15_CH2
mbed_official 219:993c9b0acbcc 45 // {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4
mbed_official 219:993c9b0acbcc 46 {PA_4, PWM_14, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM14)}, // TIM14_CH1
mbed_official 219:993c9b0acbcc 47 // {PA_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH1
mbed_official 219:993c9b0acbcc 48 {PA_6, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM16)}, // TIM16_CH1
mbed_official 219:993c9b0acbcc 49 // {PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH2
mbed_official 219:993c9b0acbcc 50 // {PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH1N
mbed_official 219:993c9b0acbcc 51 // {PA_7, PWM_14, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM14)}, // TIM14_CH1
mbed_official 219:993c9b0acbcc 52 {PA_7, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM17)}, // TIM17_CH1
mbed_official 219:993c9b0acbcc 53 {PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH1
mbed_official 219:993c9b0acbcc 54 {PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH2
mbed_official 219:993c9b0acbcc 55 {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH3
mbed_official 219:993c9b0acbcc 56 {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH4
mbed_official 219:993c9b0acbcc 57
mbed_official 219:993c9b0acbcc 58 {PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH3
mbed_official 219:993c9b0acbcc 59 // {PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH2N
mbed_official 219:993c9b0acbcc 60 {PB_1, PWM_14, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM14)}, // TIM14_CH1
mbed_official 219:993c9b0acbcc 61 // {PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH4
mbed_official 219:993c9b0acbcc 62 // {PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH3N
mbed_official 219:993c9b0acbcc 63 // {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2
mbed_official 219:993c9b0acbcc 64 {PB_4, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH1
mbed_official 219:993c9b0acbcc 65 {PB_5, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM3)}, // TIM3_CH2
mbed_official 219:993c9b0acbcc 66 {PB_6, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM16)}, // TIM16_CH1N
mbed_official 219:993c9b0acbcc 67 {PB_7, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM17)}, // TIM17_CH1N
mbed_official 219:993c9b0acbcc 68 {PB_8, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM16)}, // TIM16_CH1
mbed_official 219:993c9b0acbcc 69 {PB_9, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM17)}, // TIM17_CH1
mbed_official 219:993c9b0acbcc 70 // {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3
mbed_official 219:993c9b0acbcc 71 // {PB_11, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4
mbed_official 219:993c9b0acbcc 72 {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH1N
mbed_official 219:993c9b0acbcc 73 {PB_14, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM15)}, // TIM15_CH1
mbed_official 219:993c9b0acbcc 74 // {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH2N
mbed_official 219:993c9b0acbcc 75 {PB_15, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM15)}, // TIM15_CH2
mbed_official 219:993c9b0acbcc 76 // {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH3N
mbed_official 219:993c9b0acbcc 77 // {PB_15, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM15)}, // TIM15_CH1N
mbed_official 219:993c9b0acbcc 78
mbed_official 219:993c9b0acbcc 79 {PC_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM3)}, // TIM3_CH1
mbed_official 219:993c9b0acbcc 80 {PC_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM3)}, // TIM3_CH2
mbed_official 219:993c9b0acbcc 81 {PC_8, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM3)}, // TIM3_CH3
mbed_official 219:993c9b0acbcc 82 {PC_9, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM3)}, // TIM3_CH4
mbed_official 219:993c9b0acbcc 83
mbed_official 219:993c9b0acbcc 84 {NC, NC, 0}
mbed_official 219:993c9b0acbcc 85 };
mbed_official 219:993c9b0acbcc 86
mbed_official 219:993c9b0acbcc 87 static TIM_HandleTypeDef TimHandle;
mbed_official 219:993c9b0acbcc 88
mbed_official 402:09075a3b15e3 89 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 90 {
mbed_official 219:993c9b0acbcc 91 // Get the peripheral name from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 92 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 93
mbed_official 219:993c9b0acbcc 94 if (obj->pwm == (PWMName)NC) {
mbed_official 219:993c9b0acbcc 95 error("PWM error: pinout mapping failed.");
mbed_official 219:993c9b0acbcc 96 }
mbed_official 219:993c9b0acbcc 97
mbed_official 219:993c9b0acbcc 98 // Enable TIM clock
mbed_official 219:993c9b0acbcc 99 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 100 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 101 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 102 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 103 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 104 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 105 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 106
mbed_official 219:993c9b0acbcc 107 // Configure GPIO
mbed_official 219:993c9b0acbcc 108 pinmap_pinout(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 109
mbed_official 219:993c9b0acbcc 110 obj->pin = pin;
mbed_official 219:993c9b0acbcc 111 obj->period = 0;
mbed_official 219:993c9b0acbcc 112 obj->pulse = 0;
mbed_official 219:993c9b0acbcc 113
mbed_official 219:993c9b0acbcc 114 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 219:993c9b0acbcc 115 }
mbed_official 219:993c9b0acbcc 116
mbed_official 402:09075a3b15e3 117 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 118 {
mbed_official 219:993c9b0acbcc 119 // Configure GPIO
mbed_official 219:993c9b0acbcc 120 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 121 }
mbed_official 219:993c9b0acbcc 122
mbed_official 402:09075a3b15e3 123 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 124 {
mbed_official 219:993c9b0acbcc 125 TIM_OC_InitTypeDef sConfig;
mbed_official 219:993c9b0acbcc 126 int channel = 0;
mbed_official 219:993c9b0acbcc 127 int complementary_channel = 0;
mbed_official 219:993c9b0acbcc 128
mbed_official 219:993c9b0acbcc 129 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 130
mbed_official 219:993c9b0acbcc 131 if (value < (float)0.0) {
mbed_official 219:993c9b0acbcc 132 value = 0.0;
mbed_official 219:993c9b0acbcc 133 } else if (value > (float)1.0) {
mbed_official 219:993c9b0acbcc 134 value = 1.0;
mbed_official 219:993c9b0acbcc 135 }
mbed_official 219:993c9b0acbcc 136
mbed_official 219:993c9b0acbcc 137 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 219:993c9b0acbcc 138
mbed_official 219:993c9b0acbcc 139 // Configure channels
mbed_official 219:993c9b0acbcc 140 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 219:993c9b0acbcc 141 sConfig.Pulse = obj->pulse;
mbed_official 219:993c9b0acbcc 142 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 143 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 144 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 219:993c9b0acbcc 145 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 146 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 147
mbed_official 219:993c9b0acbcc 148 switch (obj->pin) {
mbed_official 219:993c9b0acbcc 149 // Channels 1
mbed_official 219:993c9b0acbcc 150 case PA_2:
mbed_official 219:993c9b0acbcc 151 case PA_4:
mbed_official 219:993c9b0acbcc 152 case PA_6:
mbed_official 219:993c9b0acbcc 153 case PA_7:
mbed_official 219:993c9b0acbcc 154 case PA_8:
mbed_official 219:993c9b0acbcc 155 case PB_1:
mbed_official 219:993c9b0acbcc 156 case PB_4:
mbed_official 219:993c9b0acbcc 157 case PB_8:
mbed_official 219:993c9b0acbcc 158 case PB_9:
mbed_official 219:993c9b0acbcc 159 case PB_14:
mbed_official 219:993c9b0acbcc 160 case PC_6:
mbed_official 219:993c9b0acbcc 161 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 162 break;
mbed_official 219:993c9b0acbcc 163 // Channels 1N
mbed_official 219:993c9b0acbcc 164 case PA_1:
mbed_official 219:993c9b0acbcc 165 case PB_6:
mbed_official 219:993c9b0acbcc 166 case PB_7:
mbed_official 219:993c9b0acbcc 167 case PB_13:
mbed_official 219:993c9b0acbcc 168 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 169 complementary_channel = 1;
mbed_official 219:993c9b0acbcc 170 break;
mbed_official 219:993c9b0acbcc 171 // Channels 2
mbed_official 219:993c9b0acbcc 172 case PA_3:
mbed_official 219:993c9b0acbcc 173 case PA_9:
mbed_official 219:993c9b0acbcc 174 case PB_5:
mbed_official 219:993c9b0acbcc 175 case PB_15:
mbed_official 219:993c9b0acbcc 176 case PC_7:
mbed_official 219:993c9b0acbcc 177 channel = TIM_CHANNEL_2;
mbed_official 219:993c9b0acbcc 178 break;
mbed_official 219:993c9b0acbcc 179 // Channels 3
mbed_official 219:993c9b0acbcc 180 case PA_10:
mbed_official 219:993c9b0acbcc 181 case PB_0:
mbed_official 219:993c9b0acbcc 182 case PC_8:
mbed_official 219:993c9b0acbcc 183 channel = TIM_CHANNEL_3;
mbed_official 219:993c9b0acbcc 184 break;
mbed_official 219:993c9b0acbcc 185 // Channels 4
mbed_official 219:993c9b0acbcc 186 case PA_11:
mbed_official 219:993c9b0acbcc 187 case PC_9:
mbed_official 219:993c9b0acbcc 188 channel = TIM_CHANNEL_4;
mbed_official 219:993c9b0acbcc 189 break;
mbed_official 219:993c9b0acbcc 190 default:
mbed_official 219:993c9b0acbcc 191 return;
mbed_official 219:993c9b0acbcc 192 }
mbed_official 219:993c9b0acbcc 193
mbed_official 219:993c9b0acbcc 194 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 219:993c9b0acbcc 195
mbed_official 219:993c9b0acbcc 196 if (complementary_channel) {
mbed_official 219:993c9b0acbcc 197 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 198 } else {
mbed_official 219:993c9b0acbcc 199 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 200 }
mbed_official 219:993c9b0acbcc 201 }
mbed_official 219:993c9b0acbcc 202
mbed_official 402:09075a3b15e3 203 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 204 {
mbed_official 219:993c9b0acbcc 205 float value = 0;
mbed_official 219:993c9b0acbcc 206 if (obj->period > 0) {
mbed_official 219:993c9b0acbcc 207 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 219:993c9b0acbcc 208 }
mbed_official 219:993c9b0acbcc 209 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 219:993c9b0acbcc 210 }
mbed_official 219:993c9b0acbcc 211
mbed_official 402:09075a3b15e3 212 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 213 {
mbed_official 219:993c9b0acbcc 214 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 215 }
mbed_official 219:993c9b0acbcc 216
mbed_official 402:09075a3b15e3 217 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 218 {
mbed_official 219:993c9b0acbcc 219 pwmout_period_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 220 }
mbed_official 219:993c9b0acbcc 221
mbed_official 402:09075a3b15e3 222 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 223 {
mbed_official 219:993c9b0acbcc 224 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 225
mbed_official 219:993c9b0acbcc 226 float dc = pwmout_read(obj);
mbed_official 219:993c9b0acbcc 227
mbed_official 219:993c9b0acbcc 228 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 229
mbed_official 219:993c9b0acbcc 230 // Update the SystemCoreClock variable
mbed_official 219:993c9b0acbcc 231 SystemCoreClockUpdate();
mbed_official 219:993c9b0acbcc 232
mbed_official 219:993c9b0acbcc 233 TimHandle.Init.Period = us - 1;
mbed_official 219:993c9b0acbcc 234 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 219:993c9b0acbcc 235 TimHandle.Init.ClockDivision = 0;
mbed_official 219:993c9b0acbcc 236 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 219:993c9b0acbcc 237 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 219:993c9b0acbcc 238
mbed_official 219:993c9b0acbcc 239 // Set duty cycle again
mbed_official 219:993c9b0acbcc 240 pwmout_write(obj, dc);
mbed_official 219:993c9b0acbcc 241
mbed_official 219:993c9b0acbcc 242 // Save for future use
mbed_official 219:993c9b0acbcc 243 obj->period = us;
mbed_official 219:993c9b0acbcc 244
mbed_official 219:993c9b0acbcc 245 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 246 }
mbed_official 219:993c9b0acbcc 247
mbed_official 402:09075a3b15e3 248 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 249 {
mbed_official 219:993c9b0acbcc 250 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 251 }
mbed_official 219:993c9b0acbcc 252
mbed_official 402:09075a3b15e3 253 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 254 {
mbed_official 219:993c9b0acbcc 255 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 256 }
mbed_official 219:993c9b0acbcc 257
mbed_official 402:09075a3b15e3 258 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 259 {
mbed_official 219:993c9b0acbcc 260 float value = (float)us / (float)obj->period;
mbed_official 219:993c9b0acbcc 261 pwmout_write(obj, value);
mbed_official 219:993c9b0acbcc 262 }
mbed_official 219:993c9b0acbcc 263
mbed_official 219:993c9b0acbcc 264 #endif