Ermanno Brusadin / mbed

mbed library sources

Dependents:   FRDM-KL46Z_LCD_Test FRDM-KL46Z_LCD_Test FRDM-KL46Z_Plantilla FRDM-KL46Z_Plantilla ... more

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/pwmout_api.c@0:6bc4ac881c8e, 2016-07-28 (annotated)

Committer:
ebrus
Date:
Thu Jul 28 15:56:34 2016 +0000
Revision:
0:6bc4ac881c8e
1;

Who changed what in which revision?

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ebrus 0:6bc4ac881c8e 1 /* mbed Microcontroller Library
ebrus 0:6bc4ac881c8e 2 *******************************************************************************
ebrus 0:6bc4ac881c8e 3 * Copyright (c) 2014, STMicroelectronics
ebrus 0:6bc4ac881c8e 4 * All rights reserved.
ebrus 0:6bc4ac881c8e 5 *
ebrus 0:6bc4ac881c8e 6 * Redistribution and use in source and binary forms, with or without
ebrus 0:6bc4ac881c8e 7 * modification, are permitted provided that the following conditions are met:
ebrus 0:6bc4ac881c8e 8 *
ebrus 0:6bc4ac881c8e 9 * 1. Redistributions of source code must retain the above copyright notice,
ebrus 0:6bc4ac881c8e 10 * this list of conditions and the following disclaimer.
ebrus 0:6bc4ac881c8e 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
ebrus 0:6bc4ac881c8e 12 * this list of conditions and the following disclaimer in the documentation
ebrus 0:6bc4ac881c8e 13 * and/or other materials provided with the distribution.
ebrus 0:6bc4ac881c8e 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
ebrus 0:6bc4ac881c8e 15 * may be used to endorse or promote products derived from this software
ebrus 0:6bc4ac881c8e 16 * without specific prior written permission.
ebrus 0:6bc4ac881c8e 17 *
ebrus 0:6bc4ac881c8e 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
ebrus 0:6bc4ac881c8e 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
ebrus 0:6bc4ac881c8e 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
ebrus 0:6bc4ac881c8e 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
ebrus 0:6bc4ac881c8e 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
ebrus 0:6bc4ac881c8e 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
ebrus 0:6bc4ac881c8e 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
ebrus 0:6bc4ac881c8e 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
ebrus 0:6bc4ac881c8e 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
ebrus 0:6bc4ac881c8e 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
ebrus 0:6bc4ac881c8e 28 *******************************************************************************
ebrus 0:6bc4ac881c8e 29 */
ebrus 0:6bc4ac881c8e 30 #include "mbed_assert.h"
ebrus 0:6bc4ac881c8e 31 #include "pwmout_api.h"
ebrus 0:6bc4ac881c8e 32
ebrus 0:6bc4ac881c8e 33 #if DEVICE_PWMOUT
ebrus 0:6bc4ac881c8e 34
ebrus 0:6bc4ac881c8e 35 #include "cmsis.h"
ebrus 0:6bc4ac881c8e 36 #include "pinmap.h"
ebrus 0:6bc4ac881c8e 37
ebrus 0:6bc4ac881c8e 38 // TIM5 cannot be used because already used by the us_ticker
ebrus 0:6bc4ac881c8e 39 static const PinMap PinMap_PWM[] = {
ebrus 0:6bc4ac881c8e 40 // {PA_0, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH1
ebrus 0:6bc4ac881c8e 41 {PA_1, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH2
ebrus 0:6bc4ac881c8e 42 // {PA_1, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH1
ebrus 0:6bc4ac881c8e 43 {PA_2, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH3
ebrus 0:6bc4ac881c8e 44 // {PA_2, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH3
ebrus 0:6bc4ac881c8e 45 // {PA_2, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH1
ebrus 0:6bc4ac881c8e 46 {PA_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH4
ebrus 0:6bc4ac881c8e 47 // {PA_3, PWM_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM5)}, // TIM5_CH4
ebrus 0:6bc4ac881c8e 48 // {PA_3, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH2
ebrus 0:6bc4ac881c8e 49 {PA_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
ebrus 0:6bc4ac881c8e 50 // {PA_6, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
ebrus 0:6bc4ac881c8e 51 {PA_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
ebrus 0:6bc4ac881c8e 52 // {PA_7, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
ebrus 0:6bc4ac881c8e 53 {PB_0, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH3
ebrus 0:6bc4ac881c8e 54 {PB_1, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH4
ebrus 0:6bc4ac881c8e 55 {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH2
ebrus 0:6bc4ac881c8e 56 {PB_4, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
ebrus 0:6bc4ac881c8e 57 {PB_5, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
ebrus 0:6bc4ac881c8e 58 {PB_6, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH1
ebrus 0:6bc4ac881c8e 59 {PB_7, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH2
ebrus 0:6bc4ac881c8e 60 {PB_8, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH3
ebrus 0:6bc4ac881c8e 61 // {PB_8, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
ebrus 0:6bc4ac881c8e 62 {PB_9, PWM_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM4)}, // TIM4_CH4
ebrus 0:6bc4ac881c8e 63 // {PB_9, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
ebrus 0:6bc4ac881c8e 64 {PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH3
ebrus 0:6bc4ac881c8e 65 {PB_11, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM2)}, // TIM2_CH4
ebrus 0:6bc4ac881c8e 66 {PB_12, PWM_10, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM10)}, // TIM10_CH1
ebrus 0:6bc4ac881c8e 67 {PB_13, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH1
ebrus 0:6bc4ac881c8e 68 {PB_14, PWM_9, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM9)}, // TIM9_CH2
ebrus 0:6bc4ac881c8e 69 {PB_15, PWM_11, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM11)}, // TIM11_CH1
ebrus 0:6bc4ac881c8e 70 {PC_6, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH1
ebrus 0:6bc4ac881c8e 71 {PC_7, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH2
ebrus 0:6bc4ac881c8e 72 {PC_8, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH3
ebrus 0:6bc4ac881c8e 73 {PC_9, PWM_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_TIM3)}, // TIM3_CH4
ebrus 0:6bc4ac881c8e 74 {NC, NC, 0}
ebrus 0:6bc4ac881c8e 75 };
ebrus 0:6bc4ac881c8e 76
ebrus 0:6bc4ac881c8e 77 void pwmout_init(pwmout_t* obj, PinName pin) {
ebrus 0:6bc4ac881c8e 78 // Get the peripheral name from the pin and assign it to the object
ebrus 0:6bc4ac881c8e 79 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 80 MBED_ASSERT(obj->pwm != (PWMName)NC);
ebrus 0:6bc4ac881c8e 81
ebrus 0:6bc4ac881c8e 82 // Enable TIM clock
ebrus 0:6bc4ac881c8e 83 if (obj->pwm == PWM_2) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
ebrus 0:6bc4ac881c8e 84 if (obj->pwm == PWM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
ebrus 0:6bc4ac881c8e 85 if (obj->pwm == PWM_4) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
ebrus 0:6bc4ac881c8e 86 if (obj->pwm == PWM_5) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);
ebrus 0:6bc4ac881c8e 87 if (obj->pwm == PWM_9) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM9, ENABLE);
ebrus 0:6bc4ac881c8e 88 if (obj->pwm == PWM_10) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM10, ENABLE);
ebrus 0:6bc4ac881c8e 89 if (obj->pwm == PWM_11) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM11, ENABLE);
ebrus 0:6bc4ac881c8e 90
ebrus 0:6bc4ac881c8e 91 // Configure GPIO
ebrus 0:6bc4ac881c8e 92 pinmap_pinout(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 93
ebrus 0:6bc4ac881c8e 94 obj->pin = pin;
ebrus 0:6bc4ac881c8e 95 obj->period = 0;
ebrus 0:6bc4ac881c8e 96 obj->pulse = 0;
ebrus 0:6bc4ac881c8e 97
ebrus 0:6bc4ac881c8e 98 pwmout_period_us(obj, 20000); // 20 ms per default
ebrus 0:6bc4ac881c8e 99 }
ebrus 0:6bc4ac881c8e 100
ebrus 0:6bc4ac881c8e 101 void pwmout_free(pwmout_t* obj) {
ebrus 0:6bc4ac881c8e 102 // Configure GPIOs
ebrus 0:6bc4ac881c8e 103 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
ebrus 0:6bc4ac881c8e 104 }
ebrus 0:6bc4ac881c8e 105
ebrus 0:6bc4ac881c8e 106 void pwmout_write(pwmout_t* obj, float value) {
ebrus 0:6bc4ac881c8e 107 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 108 TIM_OCInitTypeDef TIM_OCInitStructure;
ebrus 0:6bc4ac881c8e 109
ebrus 0:6bc4ac881c8e 110 if (value < 0.0) {
ebrus 0:6bc4ac881c8e 111 value = 0.0;
ebrus 0:6bc4ac881c8e 112 } else if (value > 1.0) {
ebrus 0:6bc4ac881c8e 113 value = 1.0;
ebrus 0:6bc4ac881c8e 114 }
ebrus 0:6bc4ac881c8e 115
ebrus 0:6bc4ac881c8e 116 obj->pulse = (uint32_t)((float)obj->period * value);
ebrus 0:6bc4ac881c8e 117
ebrus 0:6bc4ac881c8e 118 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
ebrus 0:6bc4ac881c8e 119 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
ebrus 0:6bc4ac881c8e 120 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
ebrus 0:6bc4ac881c8e 121 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
ebrus 0:6bc4ac881c8e 122
ebrus 0:6bc4ac881c8e 123 // Configure the channels
ebrus 0:6bc4ac881c8e 124 switch (obj->pin) {
ebrus 0:6bc4ac881c8e 125 // Channels 1
ebrus 0:6bc4ac881c8e 126 //case PA_0:
ebrus 0:6bc4ac881c8e 127 //case PA_1:
ebrus 0:6bc4ac881c8e 128 //case PA_2:
ebrus 0:6bc4ac881c8e 129 case PA_6:
ebrus 0:6bc4ac881c8e 130 //case PA_7:
ebrus 0:6bc4ac881c8e 131 case PB_4:
ebrus 0:6bc4ac881c8e 132 case PB_6:
ebrus 0:6bc4ac881c8e 133 //case PB_8:
ebrus 0:6bc4ac881c8e 134 //case PB_9:
ebrus 0:6bc4ac881c8e 135 case PB_12:
ebrus 0:6bc4ac881c8e 136 case PB_13:
ebrus 0:6bc4ac881c8e 137 case PB_15:
ebrus 0:6bc4ac881c8e 138 case PC_6:
ebrus 0:6bc4ac881c8e 139 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
ebrus 0:6bc4ac881c8e 140 TIM_OC1Init(tim, &TIM_OCInitStructure);
ebrus 0:6bc4ac881c8e 141 break;
ebrus 0:6bc4ac881c8e 142 // Channels 2
ebrus 0:6bc4ac881c8e 143 case PA_1:
ebrus 0:6bc4ac881c8e 144 //case PA_3:
ebrus 0:6bc4ac881c8e 145 case PA_7:
ebrus 0:6bc4ac881c8e 146 case PB_3:
ebrus 0:6bc4ac881c8e 147 case PB_5:
ebrus 0:6bc4ac881c8e 148 case PB_7:
ebrus 0:6bc4ac881c8e 149 case PB_14:
ebrus 0:6bc4ac881c8e 150 case PC_7:
ebrus 0:6bc4ac881c8e 151 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
ebrus 0:6bc4ac881c8e 152 TIM_OC2Init(tim, &TIM_OCInitStructure);
ebrus 0:6bc4ac881c8e 153 break;
ebrus 0:6bc4ac881c8e 154 // Channels 3
ebrus 0:6bc4ac881c8e 155 case PA_2:
ebrus 0:6bc4ac881c8e 156 case PB_0:
ebrus 0:6bc4ac881c8e 157 case PB_8:
ebrus 0:6bc4ac881c8e 158 case PB_10:
ebrus 0:6bc4ac881c8e 159 case PC_8:
ebrus 0:6bc4ac881c8e 160 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
ebrus 0:6bc4ac881c8e 161 TIM_OC3Init(tim, &TIM_OCInitStructure);
ebrus 0:6bc4ac881c8e 162 break;
ebrus 0:6bc4ac881c8e 163 // Channels 4
ebrus 0:6bc4ac881c8e 164 case PA_3:
ebrus 0:6bc4ac881c8e 165 case PB_1:
ebrus 0:6bc4ac881c8e 166 case PB_9:
ebrus 0:6bc4ac881c8e 167 case PB_11:
ebrus 0:6bc4ac881c8e 168 case PC_9:
ebrus 0:6bc4ac881c8e 169 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
ebrus 0:6bc4ac881c8e 170 TIM_OC4Init(tim, &TIM_OCInitStructure);
ebrus 0:6bc4ac881c8e 171 break;
ebrus 0:6bc4ac881c8e 172 default:
ebrus 0:6bc4ac881c8e 173 return;
ebrus 0:6bc4ac881c8e 174 }
ebrus 0:6bc4ac881c8e 175 }
ebrus 0:6bc4ac881c8e 176
ebrus 0:6bc4ac881c8e 177 float pwmout_read(pwmout_t* obj) {
ebrus 0:6bc4ac881c8e 178 float value = 0;
ebrus 0:6bc4ac881c8e 179 if (obj->period > 0) {
ebrus 0:6bc4ac881c8e 180 value = (float)(obj->pulse) / (float)(obj->period);
ebrus 0:6bc4ac881c8e 181 }
ebrus 0:6bc4ac881c8e 182 return ((value > 1.0) ? (1.0) : (value));
ebrus 0:6bc4ac881c8e 183 }
ebrus 0:6bc4ac881c8e 184
ebrus 0:6bc4ac881c8e 185 void pwmout_period(pwmout_t* obj, float seconds) {
ebrus 0:6bc4ac881c8e 186 pwmout_period_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 187 }
ebrus 0:6bc4ac881c8e 188
ebrus 0:6bc4ac881c8e 189 void pwmout_period_ms(pwmout_t* obj, int ms) {
ebrus 0:6bc4ac881c8e 190 pwmout_period_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 191 }
ebrus 0:6bc4ac881c8e 192
ebrus 0:6bc4ac881c8e 193 void pwmout_period_us(pwmout_t* obj, int us) {
ebrus 0:6bc4ac881c8e 194 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 195 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
ebrus 0:6bc4ac881c8e 196 float dc = pwmout_read(obj);
ebrus 0:6bc4ac881c8e 197
ebrus 0:6bc4ac881c8e 198 TIM_Cmd(tim, DISABLE);
ebrus 0:6bc4ac881c8e 199
ebrus 0:6bc4ac881c8e 200 obj->period = us;
ebrus 0:6bc4ac881c8e 201
ebrus 0:6bc4ac881c8e 202 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
ebrus 0:6bc4ac881c8e 203 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
ebrus 0:6bc4ac881c8e 204 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
ebrus 0:6bc4ac881c8e 205 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
ebrus 0:6bc4ac881c8e 206 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
ebrus 0:6bc4ac881c8e 207
ebrus 0:6bc4ac881c8e 208 // Set duty cycle again
ebrus 0:6bc4ac881c8e 209 pwmout_write(obj, dc);
ebrus 0:6bc4ac881c8e 210
ebrus 0:6bc4ac881c8e 211 TIM_ARRPreloadConfig(tim, ENABLE);
ebrus 0:6bc4ac881c8e 212 TIM_Cmd(tim, ENABLE);
ebrus 0:6bc4ac881c8e 213 }
ebrus 0:6bc4ac881c8e 214
ebrus 0:6bc4ac881c8e 215 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
ebrus 0:6bc4ac881c8e 216 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 217 }
ebrus 0:6bc4ac881c8e 218
ebrus 0:6bc4ac881c8e 219 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
ebrus 0:6bc4ac881c8e 220 pwmout_pulsewidth_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 221 }
ebrus 0:6bc4ac881c8e 222
ebrus 0:6bc4ac881c8e 223 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
ebrus 0:6bc4ac881c8e 224 float value = (float)us / (float)obj->period;
ebrus 0:6bc4ac881c8e 225 pwmout_write(obj, value);
ebrus 0:6bc4ac881c8e 226 }
ebrus 0:6bc4ac881c8e 227
ebrus 0:6bc4ac881c8e 228 #endif