Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/pwmout_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
219:993c9b0acbcc
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

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 250:a49055e7a707 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 219:993c9b0acbcc 89 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 219:993c9b0acbcc 90 // Get the peripheral name from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 91 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 92
mbed_official 219:993c9b0acbcc 93 if (obj->pwm == (PWMName)NC) {
mbed_official 219:993c9b0acbcc 94 error("PWM error: pinout mapping failed.");
mbed_official 219:993c9b0acbcc 95 }
mbed_official 219:993c9b0acbcc 96
mbed_official 219:993c9b0acbcc 97 // Enable TIM clock
mbed_official 219:993c9b0acbcc 98 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 99 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 100 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 101 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 102 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 103 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 104 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 105
mbed_official 219:993c9b0acbcc 106 // Configure GPIO
mbed_official 219:993c9b0acbcc 107 pinmap_pinout(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 108
mbed_official 219:993c9b0acbcc 109 obj->pin = pin;
mbed_official 219:993c9b0acbcc 110 obj->period = 0;
mbed_official 219:993c9b0acbcc 111 obj->pulse = 0;
mbed_official 219:993c9b0acbcc 112
mbed_official 219:993c9b0acbcc 113 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 219:993c9b0acbcc 114 }
mbed_official 219:993c9b0acbcc 115
mbed_official 219:993c9b0acbcc 116 void pwmout_free(pwmout_t* obj) {
mbed_official 219:993c9b0acbcc 117 // Configure GPIO
mbed_official 219:993c9b0acbcc 118 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 119 }
mbed_official 219:993c9b0acbcc 120
mbed_official 219:993c9b0acbcc 121 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 219:993c9b0acbcc 122 TIM_OC_InitTypeDef sConfig;
mbed_official 219:993c9b0acbcc 123 int channel = 0;
mbed_official 219:993c9b0acbcc 124 int complementary_channel = 0;
mbed_official 219:993c9b0acbcc 125
mbed_official 219:993c9b0acbcc 126 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 127
mbed_official 219:993c9b0acbcc 128 if (value < (float)0.0) {
mbed_official 219:993c9b0acbcc 129 value = 0.0;
mbed_official 219:993c9b0acbcc 130 } else if (value > (float)1.0) {
mbed_official 219:993c9b0acbcc 131 value = 1.0;
mbed_official 219:993c9b0acbcc 132 }
mbed_official 219:993c9b0acbcc 133
mbed_official 219:993c9b0acbcc 134 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 219:993c9b0acbcc 135
mbed_official 219:993c9b0acbcc 136 // Configure channels
mbed_official 219:993c9b0acbcc 137 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 219:993c9b0acbcc 138 sConfig.Pulse = obj->pulse;
mbed_official 219:993c9b0acbcc 139 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 140 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 141 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 219:993c9b0acbcc 142 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 143 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 144
mbed_official 219:993c9b0acbcc 145 switch (obj->pin) {
mbed_official 219:993c9b0acbcc 146 // Channels 1
mbed_official 219:993c9b0acbcc 147 case PA_2:
mbed_official 219:993c9b0acbcc 148 case PA_4:
mbed_official 219:993c9b0acbcc 149 case PA_6:
mbed_official 219:993c9b0acbcc 150 case PA_7:
mbed_official 219:993c9b0acbcc 151 case PA_8:
mbed_official 219:993c9b0acbcc 152 case PB_1:
mbed_official 219:993c9b0acbcc 153 case PB_4:
mbed_official 219:993c9b0acbcc 154 case PB_8:
mbed_official 219:993c9b0acbcc 155 case PB_9:
mbed_official 219:993c9b0acbcc 156 case PB_14:
mbed_official 219:993c9b0acbcc 157 case PC_6:
mbed_official 219:993c9b0acbcc 158 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 159 break;
mbed_official 219:993c9b0acbcc 160 // Channels 1N
mbed_official 219:993c9b0acbcc 161 case PA_1:
mbed_official 219:993c9b0acbcc 162 case PB_6:
mbed_official 219:993c9b0acbcc 163 case PB_7:
mbed_official 219:993c9b0acbcc 164 case PB_13:
mbed_official 219:993c9b0acbcc 165 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 166 complementary_channel = 1;
mbed_official 219:993c9b0acbcc 167 break;
mbed_official 219:993c9b0acbcc 168 // Channels 2
mbed_official 219:993c9b0acbcc 169 case PA_3:
mbed_official 219:993c9b0acbcc 170 case PA_9:
mbed_official 219:993c9b0acbcc 171 case PB_5:
mbed_official 219:993c9b0acbcc 172 case PB_15:
mbed_official 219:993c9b0acbcc 173 case PC_7:
mbed_official 219:993c9b0acbcc 174 channel = TIM_CHANNEL_2;
mbed_official 219:993c9b0acbcc 175 break;
mbed_official 219:993c9b0acbcc 176 // Channels 3
mbed_official 219:993c9b0acbcc 177 case PA_10:
mbed_official 219:993c9b0acbcc 178 case PB_0:
mbed_official 219:993c9b0acbcc 179 case PC_8:
mbed_official 219:993c9b0acbcc 180 channel = TIM_CHANNEL_3;
mbed_official 219:993c9b0acbcc 181 break;
mbed_official 219:993c9b0acbcc 182 // Channels 4
mbed_official 219:993c9b0acbcc 183 case PA_11:
mbed_official 219:993c9b0acbcc 184 case PC_9:
mbed_official 219:993c9b0acbcc 185 channel = TIM_CHANNEL_4;
mbed_official 219:993c9b0acbcc 186 break;
mbed_official 219:993c9b0acbcc 187 default:
mbed_official 219:993c9b0acbcc 188 return;
mbed_official 219:993c9b0acbcc 189 }
mbed_official 219:993c9b0acbcc 190
mbed_official 219:993c9b0acbcc 191 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 219:993c9b0acbcc 192
mbed_official 219:993c9b0acbcc 193 if (complementary_channel) {
mbed_official 219:993c9b0acbcc 194 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 195 } else {
mbed_official 219:993c9b0acbcc 196 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 197 }
mbed_official 219:993c9b0acbcc 198 }
mbed_official 219:993c9b0acbcc 199
mbed_official 219:993c9b0acbcc 200 float pwmout_read(pwmout_t* obj) {
mbed_official 219:993c9b0acbcc 201 float value = 0;
mbed_official 219:993c9b0acbcc 202 if (obj->period > 0) {
mbed_official 219:993c9b0acbcc 203 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 219:993c9b0acbcc 204 }
mbed_official 219:993c9b0acbcc 205 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 219:993c9b0acbcc 206 }
mbed_official 219:993c9b0acbcc 207
mbed_official 219:993c9b0acbcc 208 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 219:993c9b0acbcc 209 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 210 }
mbed_official 219:993c9b0acbcc 211
mbed_official 219:993c9b0acbcc 212 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 219:993c9b0acbcc 213 pwmout_period_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 214 }
mbed_official 219:993c9b0acbcc 215
mbed_official 219:993c9b0acbcc 216 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 219:993c9b0acbcc 217 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 218
mbed_official 219:993c9b0acbcc 219 float dc = pwmout_read(obj);
mbed_official 219:993c9b0acbcc 220
mbed_official 219:993c9b0acbcc 221 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 222
mbed_official 219:993c9b0acbcc 223 // Update the SystemCoreClock variable
mbed_official 219:993c9b0acbcc 224 SystemCoreClockUpdate();
mbed_official 219:993c9b0acbcc 225
mbed_official 219:993c9b0acbcc 226 TimHandle.Init.Period = us - 1;
mbed_official 219:993c9b0acbcc 227 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 219:993c9b0acbcc 228 TimHandle.Init.ClockDivision = 0;
mbed_official 219:993c9b0acbcc 229 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 219:993c9b0acbcc 230 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 219:993c9b0acbcc 231
mbed_official 219:993c9b0acbcc 232 // Set duty cycle again
mbed_official 219:993c9b0acbcc 233 pwmout_write(obj, dc);
mbed_official 219:993c9b0acbcc 234
mbed_official 219:993c9b0acbcc 235 // Save for future use
mbed_official 219:993c9b0acbcc 236 obj->period = us;
mbed_official 219:993c9b0acbcc 237
mbed_official 219:993c9b0acbcc 238 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 239 }
mbed_official 219:993c9b0acbcc 240
mbed_official 219:993c9b0acbcc 241 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 219:993c9b0acbcc 242 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 243 }
mbed_official 219:993c9b0acbcc 244
mbed_official 219:993c9b0acbcc 245 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 219:993c9b0acbcc 246 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 247 }
mbed_official 219:993c9b0acbcc 248
mbed_official 219:993c9b0acbcc 249 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 219:993c9b0acbcc 250 float value = (float)us / (float)obj->period;
mbed_official 219:993c9b0acbcc 251 pwmout_write(obj, value);
mbed_official 219:993c9b0acbcc 252 }
mbed_official 219:993c9b0acbcc 253
mbed_official 219:993c9b0acbcc 254 #endif