shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/pwmout_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
227:7bd0639b8911 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 76:aeb1df146756 31 #include "pwmout_api.h"
mbed_official 76:aeb1df146756 32
mbed_official 174:8bb9f3a33240 33 #if DEVICE_PWMOUT
mbed_official 174:8bb9f3a33240 34
mbed_official 76:aeb1df146756 35 #include "cmsis.h"
mbed_official 76:aeb1df146756 36 #include "pinmap.h"
mbed_official 76:aeb1df146756 37
mbed_official 129:0182c99221bc 38 // TIM5 cannot be used because already used by the us_ticker
mbed_official 76:aeb1df146756 39 static const PinMap PinMap_PWM[] = {
mbed_official 174:8bb9f3a33240 40 // {PA_0, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH1
mbed_official 129:0182c99221bc 41 {PA_1, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH2
mbed_official 174:8bb9f3a33240 42 // {PA_1, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH1
mbed_official 129:0182c99221bc 43 {PA_2, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH3
mbed_official 174:8bb9f3a33240 44 // {PA_2, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH3
mbed_official 174:8bb9f3a33240 45 // {PA_2, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH1
mbed_official 129:0182c99221bc 46 {PA_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH4
mbed_official 174:8bb9f3a33240 47 // {PA_3, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH4
mbed_official 174:8bb9f3a33240 48 // {PA_3, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH2
mbed_official 129:0182c99221bc 49 {PA_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
mbed_official 174:8bb9f3a33240 50 // {PA_6, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
mbed_official 129:0182c99221bc 51 {PA_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
mbed_official 174:8bb9f3a33240 52 // {PA_7, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
mbed_official 129:0182c99221bc 53 {PB_0, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH3
mbed_official 129:0182c99221bc 54 {PB_1, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH4
mbed_official 129:0182c99221bc 55 {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH2
mbed_official 129:0182c99221bc 56 {PB_4, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
mbed_official 129:0182c99221bc 57 {PB_5, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
mbed_official 129:0182c99221bc 58 {PB_6, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH1
mbed_official 129:0182c99221bc 59 {PB_7, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH2
mbed_official 129:0182c99221bc 60 {PB_8, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH3
mbed_official 174:8bb9f3a33240 61 // {PB_8, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
mbed_official 129:0182c99221bc 62 {PB_9, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH4
mbed_official 174:8bb9f3a33240 63 // {PB_9, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
mbed_official 129:0182c99221bc 64 {PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH3
mbed_official 129:0182c99221bc 65 {PB_11, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH4
mbed_official 129:0182c99221bc 66 {PB_12, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
mbed_official 129:0182c99221bc 67 {PB_13, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH1
mbed_official 129:0182c99221bc 68 {PB_14, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH2
mbed_official 174:8bb9f3a33240 69 {PB_15, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
mbed_official 129:0182c99221bc 70 {PC_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
mbed_official 129:0182c99221bc 71 {PC_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
mbed_official 129:0182c99221bc 72 {PC_8, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH3
mbed_official 174:8bb9f3a33240 73 {PC_9, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH4
mbed_official 129:0182c99221bc 74 {NC, NC, 0}
mbed_official 76:aeb1df146756 75 };
mbed_official 76:aeb1df146756 76
mbed_official 174:8bb9f3a33240 77 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 76:aeb1df146756 78 // Get the peripheral name from the pin and assign it to the object
mbed_official 76:aeb1df146756 79 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 227:7bd0639b8911 80 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 174:8bb9f3a33240 81
mbed_official 76:aeb1df146756 82 // Enable TIM clock
mbed_official 76:aeb1df146756 83 if (obj->pwm == PWM_2) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
mbed_official 76:aeb1df146756 84 if (obj->pwm == PWM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 84:f54042cbc282 85 if (obj->pwm == PWM_4) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
mbed_official 129:0182c99221bc 86 if (obj->pwm == PWM_5) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
mbed_official 129:0182c99221bc 87 if (obj->pwm == PWM_9) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9, ENABLE);
mbed_official 129:0182c99221bc 88 if (obj->pwm == PWM_10) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM10, ENABLE);
mbed_official 129:0182c99221bc 89 if (obj->pwm == PWM_11) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM11, ENABLE);
mbed_official 174:8bb9f3a33240 90
mbed_official 76:aeb1df146756 91 // Configure GPIO
mbed_official 76:aeb1df146756 92 pinmap_pinout(pin, PinMap_PWM);
mbed_official 174:8bb9f3a33240 93
mbed_official 76:aeb1df146756 94 obj->pin = pin;
mbed_official 76:aeb1df146756 95 obj->period = 0;
mbed_official 76:aeb1df146756 96 obj->pulse = 0;
mbed_official 174:8bb9f3a33240 97
mbed_official 76:aeb1df146756 98 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 76:aeb1df146756 99 }
mbed_official 76:aeb1df146756 100
mbed_official 76:aeb1df146756 101 void pwmout_free(pwmout_t* obj) {
mbed_official 215:83cf97a28428 102 // Configure GPIOs
mbed_official 215:83cf97a28428 103 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 76:aeb1df146756 104 }
mbed_official 76:aeb1df146756 105
mbed_official 76:aeb1df146756 106 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 76:aeb1df146756 107 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 76:aeb1df146756 108 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 129:0182c99221bc 109
mbed_official 76:aeb1df146756 110 if (value < 0.0) {
mbed_official 76:aeb1df146756 111 value = 0.0;
mbed_official 76:aeb1df146756 112 } else if (value > 1.0) {
mbed_official 76:aeb1df146756 113 value = 1.0;
mbed_official 76:aeb1df146756 114 }
mbed_official 174:8bb9f3a33240 115
mbed_official 76:aeb1df146756 116 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 174:8bb9f3a33240 117
mbed_official 129:0182c99221bc 118 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 76:aeb1df146756 119 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 129:0182c99221bc 120 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 129:0182c99221bc 121 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 76:aeb1df146756 122
mbed_official 129:0182c99221bc 123 // Configure the channels
mbed_official 129:0182c99221bc 124 switch (obj->pin) {
mbed_official 129:0182c99221bc 125 // Channels 1
mbed_official 174:8bb9f3a33240 126 //case PA_0:
mbed_official 174:8bb9f3a33240 127 //case PA_1:
mbed_official 174:8bb9f3a33240 128 //case PA_2:
mbed_official 129:0182c99221bc 129 case PA_6:
mbed_official 174:8bb9f3a33240 130 //case PA_7:
mbed_official 129:0182c99221bc 131 case PB_4:
mbed_official 129:0182c99221bc 132 case PB_6:
mbed_official 174:8bb9f3a33240 133 //case PB_8:
mbed_official 174:8bb9f3a33240 134 //case PB_9:
mbed_official 129:0182c99221bc 135 case PB_12:
mbed_official 129:0182c99221bc 136 case PB_13:
mbed_official 129:0182c99221bc 137 case PB_15:
mbed_official 129:0182c99221bc 138 case PC_6:
mbed_official 129:0182c99221bc 139 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 129:0182c99221bc 140 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 129:0182c99221bc 141 break;
mbed_official 129:0182c99221bc 142 // Channels 2
mbed_official 129:0182c99221bc 143 case PA_1:
mbed_official 174:8bb9f3a33240 144 //case PA_3:
mbed_official 129:0182c99221bc 145 case PA_7:
mbed_official 129:0182c99221bc 146 case PB_3:
mbed_official 129:0182c99221bc 147 case PB_5:
mbed_official 129:0182c99221bc 148 case PB_7:
mbed_official 129:0182c99221bc 149 case PB_14:
mbed_official 129:0182c99221bc 150 case PC_7:
mbed_official 129:0182c99221bc 151 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 129:0182c99221bc 152 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 129:0182c99221bc 153 break;
mbed_official 129:0182c99221bc 154 // Channels 3
mbed_official 129:0182c99221bc 155 case PA_2:
mbed_official 129:0182c99221bc 156 case PB_0:
mbed_official 129:0182c99221bc 157 case PB_8:
mbed_official 129:0182c99221bc 158 case PB_10:
mbed_official 129:0182c99221bc 159 case PC_8:
mbed_official 129:0182c99221bc 160 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 129:0182c99221bc 161 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 129:0182c99221bc 162 break;
mbed_official 129:0182c99221bc 163 // Channels 4
mbed_official 129:0182c99221bc 164 case PA_3:
mbed_official 129:0182c99221bc 165 case PB_1:
mbed_official 129:0182c99221bc 166 case PB_9:
mbed_official 129:0182c99221bc 167 case PB_11:
mbed_official 129:0182c99221bc 168 case PC_9:
mbed_official 129:0182c99221bc 169 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 129:0182c99221bc 170 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 174:8bb9f3a33240 171 break;
mbed_official 129:0182c99221bc 172 default:
mbed_official 129:0182c99221bc 173 return;
mbed_official 76:aeb1df146756 174 }
mbed_official 76:aeb1df146756 175 }
mbed_official 76:aeb1df146756 176
mbed_official 76:aeb1df146756 177 float pwmout_read(pwmout_t* obj) {
mbed_official 76:aeb1df146756 178 float value = 0;
mbed_official 76:aeb1df146756 179 if (obj->period > 0) {
mbed_official 76:aeb1df146756 180 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 76:aeb1df146756 181 }
mbed_official 76:aeb1df146756 182 return ((value > 1.0) ? (1.0) : (value));
mbed_official 76:aeb1df146756 183 }
mbed_official 76:aeb1df146756 184
mbed_official 76:aeb1df146756 185 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 76:aeb1df146756 186 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 76:aeb1df146756 187 }
mbed_official 76:aeb1df146756 188
mbed_official 76:aeb1df146756 189 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 76:aeb1df146756 190 pwmout_period_us(obj, ms * 1000);
mbed_official 76:aeb1df146756 191 }
mbed_official 76:aeb1df146756 192
mbed_official 76:aeb1df146756 193 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 76:aeb1df146756 194 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 76:aeb1df146756 195 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 76:aeb1df146756 196 float dc = pwmout_read(obj);
mbed_official 76:aeb1df146756 197
mbed_official 174:8bb9f3a33240 198 TIM_Cmd(tim, DISABLE);
mbed_official 174:8bb9f3a33240 199
mbed_official 76:aeb1df146756 200 obj->period = us;
mbed_official 174:8bb9f3a33240 201
mbed_official 129:0182c99221bc 202 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 129:0182c99221bc 203 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 76:aeb1df146756 204 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 129:0182c99221bc 205 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 76:aeb1df146756 206 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 76:aeb1df146756 207
mbed_official 76:aeb1df146756 208 // Set duty cycle again
mbed_official 76:aeb1df146756 209 pwmout_write(obj, dc);
mbed_official 174:8bb9f3a33240 210
mbed_official 174:8bb9f3a33240 211 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 76:aeb1df146756 212 TIM_Cmd(tim, ENABLE);
mbed_official 76:aeb1df146756 213 }
mbed_official 76:aeb1df146756 214
mbed_official 76:aeb1df146756 215 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 76:aeb1df146756 216 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 76:aeb1df146756 217 }
mbed_official 76:aeb1df146756 218
mbed_official 76:aeb1df146756 219 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 76:aeb1df146756 220 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 76:aeb1df146756 221 }
mbed_official 76:aeb1df146756 222
mbed_official 76:aeb1df146756 223 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 76:aeb1df146756 224 float value = (float)us / (float)obj->period;
mbed_official 76:aeb1df146756 225 pwmout_write(obj, value);
mbed_official 76:aeb1df146756 226 }
mbed_official 174:8bb9f3a33240 227
mbed_official 174:8bb9f3a33240 228 #endif