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_DISCO_F303VC/pwmout_api.c@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
157:90e3acc479a2
Child:
241:ffe41b0c8126
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 *******************************************************************************
mbed_official 157:90e3acc479a2 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 4 * All rights reserved.
mbed_official 157:90e3acc479a2 5 *
mbed_official 157:90e3acc479a2 6 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 7 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 8 *
mbed_official 157:90e3acc479a2 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 10 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 13 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 15 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 16 * without specific prior written permission.
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 28 *******************************************************************************
mbed_official 157:90e3acc479a2 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 157:90e3acc479a2 31 #include "pwmout_api.h"
mbed_official 157:90e3acc479a2 32
mbed_official 157:90e3acc479a2 33 #include "cmsis.h"
mbed_official 157:90e3acc479a2 34 #include "pinmap.h"
mbed_official 157:90e3acc479a2 35
mbed_official 157:90e3acc479a2 36 // TIM2 cannot be used because already used by the us_ticker
mbed_official 157:90e3acc479a2 37 static const PinMap PinMap_PWM[] = {
mbed_official 157:90e3acc479a2 38 // {PA_0, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 157:90e3acc479a2 39 // {PA_1, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH2
mbed_official 157:90e3acc479a2 40 {PA_1, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH1N
mbed_official 157:90e3acc479a2 41 {PA_2, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH1
mbed_official 157:90e3acc479a2 42 {PA_3, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH2
mbed_official 157:90e3acc479a2 43 // {PA_5, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 157:90e3acc479a2 44 {PA_6, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 157:90e3acc479a2 45 {PA_7, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1
mbed_official 157:90e3acc479a2 46 // {PA_7, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 157:90e3acc479a2 47 {PA_8, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1
mbed_official 157:90e3acc479a2 48 {PA_9, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2
mbed_official 157:90e3acc479a2 49 // {PA_9, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM2_CH3
mbed_official 157:90e3acc479a2 50 {PA_10, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3
mbed_official 157:90e3acc479a2 51 // {PA_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM2_CH4
mbed_official 157:90e3acc479a2 52 {PA_11, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_11)}, // TIM1_CH4
mbed_official 157:90e3acc479a2 53 // {PA_11, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 157:90e3acc479a2 54 {PA_12, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 157:90e3acc479a2 55 // {PA_12, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 157:90e3acc479a2 56 {PA_13, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1N
mbed_official 157:90e3acc479a2 57 // {PA_15, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 157:90e3acc479a2 58
mbed_official 157:90e3acc479a2 59 {PB_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 157:90e3acc479a2 60 {PB_1, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3N
mbed_official 157:90e3acc479a2 61 // {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH2
mbed_official 157:90e3acc479a2 62 {PB_4, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 157:90e3acc479a2 63 {PB_5, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM17_CH1
mbed_official 157:90e3acc479a2 64 {PB_6, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1N
mbed_official 157:90e3acc479a2 65 {PB_7, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1N
mbed_official 157:90e3acc479a2 66 {PB_8, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 157:90e3acc479a2 67 {PB_9, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1
mbed_official 157:90e3acc479a2 68 // {PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH3
mbed_official 157:90e3acc479a2 69 // {PB_11, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH4
mbed_official 157:90e3acc479a2 70 {PB_13, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 157:90e3acc479a2 71 {PB_14, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM15_CH1
mbed_official 157:90e3acc479a2 72 // {PB_14, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 157:90e3acc479a2 73 {PB_15, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM15_CH2
mbed_official 157:90e3acc479a2 74 // {PB_15, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM15_CH1N
mbed_official 157:90e3acc479a2 75 // {PB_15, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_4)}, // TIM1_CH3N
mbed_official 157:90e3acc479a2 76
mbed_official 157:90e3acc479a2 77 {PC_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH1
mbed_official 157:90e3acc479a2 78 {PC_1, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH2
mbed_official 157:90e3acc479a2 79 {PC_2, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH3
mbed_official 157:90e3acc479a2 80 {PC_3, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH4
mbed_official 157:90e3acc479a2 81 {PC_13, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_4)}, // TIM1_CH1N
mbed_official 157:90e3acc479a2 82
mbed_official 157:90e3acc479a2 83 {PF_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3N
mbed_official 157:90e3acc479a2 84
mbed_official 157:90e3acc479a2 85 {NC, NC, 0}
mbed_official 157:90e3acc479a2 86 };
mbed_official 157:90e3acc479a2 87
mbed_official 227:7bd0639b8911 88 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 157:90e3acc479a2 89 // Get the peripheral name from the pin and assign it to the object
mbed_official 157:90e3acc479a2 90 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 227:7bd0639b8911 91 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 157:90e3acc479a2 92
mbed_official 157:90e3acc479a2 93 // Enable TIM clock
mbed_official 157:90e3acc479a2 94 if (obj->pwm == PWM_1) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
mbed_official 157:90e3acc479a2 95 if (obj->pwm == PWM_15) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
mbed_official 157:90e3acc479a2 96 if (obj->pwm == PWM_16) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
mbed_official 157:90e3acc479a2 97 if (obj->pwm == PWM_17) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17, ENABLE);
mbed_official 157:90e3acc479a2 98
mbed_official 157:90e3acc479a2 99 // Configure GPIO
mbed_official 157:90e3acc479a2 100 pinmap_pinout(pin, PinMap_PWM);
mbed_official 157:90e3acc479a2 101
mbed_official 157:90e3acc479a2 102 obj->pin = pin;
mbed_official 157:90e3acc479a2 103 obj->period = 0;
mbed_official 157:90e3acc479a2 104 obj->pulse = 0;
mbed_official 157:90e3acc479a2 105
mbed_official 157:90e3acc479a2 106 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 157:90e3acc479a2 107 }
mbed_official 157:90e3acc479a2 108
mbed_official 157:90e3acc479a2 109 void pwmout_free(pwmout_t* obj) {
mbed_official 157:90e3acc479a2 110 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 111 TIM_DeInit(tim);
mbed_official 157:90e3acc479a2 112 }
mbed_official 157:90e3acc479a2 113
mbed_official 157:90e3acc479a2 114 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 157:90e3acc479a2 115 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 116 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 157:90e3acc479a2 117
mbed_official 157:90e3acc479a2 118 if (value < (float)0.0) {
mbed_official 157:90e3acc479a2 119 value = (float)0.0;
mbed_official 157:90e3acc479a2 120 } else if (value > (float)1.0) {
mbed_official 157:90e3acc479a2 121 value = (float)1.0;
mbed_official 157:90e3acc479a2 122 }
mbed_official 157:90e3acc479a2 123
mbed_official 157:90e3acc479a2 124 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 157:90e3acc479a2 125
mbed_official 227:7bd0639b8911 126 // Configure channels
mbed_official 157:90e3acc479a2 127 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 157:90e3acc479a2 128 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 157:90e3acc479a2 129 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 157:90e3acc479a2 130 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
mbed_official 157:90e3acc479a2 131 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 157:90e3acc479a2 132 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 157:90e3acc479a2 133
mbed_official 157:90e3acc479a2 134 switch (obj->pin) {
mbed_official 157:90e3acc479a2 135 // Channels 1
mbed_official 157:90e3acc479a2 136 // case PA_0:
mbed_official 157:90e3acc479a2 137 case PA_2:
mbed_official 157:90e3acc479a2 138 // case PA_5:
mbed_official 157:90e3acc479a2 139 case PA_6:
mbed_official 157:90e3acc479a2 140 case PA_7:
mbed_official 157:90e3acc479a2 141 case PA_8:
mbed_official 157:90e3acc479a2 142 case PA_12:
mbed_official 157:90e3acc479a2 143 // case PA_15:
mbed_official 157:90e3acc479a2 144 case PB_4:
mbed_official 157:90e3acc479a2 145 case PB_5:
mbed_official 157:90e3acc479a2 146 case PB_8:
mbed_official 157:90e3acc479a2 147 case PB_9:
mbed_official 157:90e3acc479a2 148 case PB_14:
mbed_official 157:90e3acc479a2 149 case PC_0:
mbed_official 157:90e3acc479a2 150 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 151 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 152 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 153 break;
mbed_official 157:90e3acc479a2 154 // Channels 1N
mbed_official 157:90e3acc479a2 155 case PA_1:
mbed_official 157:90e3acc479a2 156 // case PA_7:
mbed_official 157:90e3acc479a2 157 // case PA_11:
mbed_official 157:90e3acc479a2 158 case PA_13:
mbed_official 157:90e3acc479a2 159 case PB_6:
mbed_official 157:90e3acc479a2 160 case PB_7:
mbed_official 157:90e3acc479a2 161 case PB_13:
mbed_official 157:90e3acc479a2 162 // case PB_15:
mbed_official 157:90e3acc479a2 163 case PC_13:
mbed_official 157:90e3acc479a2 164 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 165 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 166 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 167 break;
mbed_official 157:90e3acc479a2 168 // Channels 2
mbed_official 157:90e3acc479a2 169 // case PA_1:
mbed_official 157:90e3acc479a2 170 case PA_3:
mbed_official 157:90e3acc479a2 171 case PA_9:
mbed_official 157:90e3acc479a2 172 // case PB_3:
mbed_official 157:90e3acc479a2 173 case PB_15:
mbed_official 157:90e3acc479a2 174 case PC_1:
mbed_official 157:90e3acc479a2 175 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 176 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 177 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 178 break;
mbed_official 157:90e3acc479a2 179 // Channels 2N
mbed_official 157:90e3acc479a2 180 // case PA_12:
mbed_official 157:90e3acc479a2 181 case PB_0:
mbed_official 157:90e3acc479a2 182 // case PB_14:
mbed_official 157:90e3acc479a2 183 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 184 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 185 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 186 break;
mbed_official 157:90e3acc479a2 187 // Channels 3
mbed_official 157:90e3acc479a2 188 // case PA_9:
mbed_official 157:90e3acc479a2 189 case PA_10:
mbed_official 157:90e3acc479a2 190 // case PB_10:
mbed_official 157:90e3acc479a2 191 case PC_2:
mbed_official 157:90e3acc479a2 192 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 193 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 194 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 195 break;
mbed_official 157:90e3acc479a2 196 // Channels 3N
mbed_official 157:90e3acc479a2 197 case PB_1:
mbed_official 157:90e3acc479a2 198 case PF_0:
mbed_official 157:90e3acc479a2 199 // case PB_15:
mbed_official 157:90e3acc479a2 200 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 201 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 202 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 203 break;
mbed_official 157:90e3acc479a2 204 // Channels 4
mbed_official 157:90e3acc479a2 205 // case PA_10:
mbed_official 157:90e3acc479a2 206 case PA_11:
mbed_official 157:90e3acc479a2 207 // case PB_11:
mbed_official 157:90e3acc479a2 208 case PC_3:
mbed_official 157:90e3acc479a2 209 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 210 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 211 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 212 break;
mbed_official 157:90e3acc479a2 213 default:
mbed_official 157:90e3acc479a2 214 return;
mbed_official 227:7bd0639b8911 215 }
mbed_official 157:90e3acc479a2 216 }
mbed_official 157:90e3acc479a2 217
mbed_official 157:90e3acc479a2 218 float pwmout_read(pwmout_t* obj) {
mbed_official 157:90e3acc479a2 219 float value = 0;
mbed_official 157:90e3acc479a2 220 if (obj->period > 0) {
mbed_official 157:90e3acc479a2 221 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 157:90e3acc479a2 222 }
mbed_official 157:90e3acc479a2 223 return ((value > (float)1.0) ? ((float)1.0) : (value));
mbed_official 157:90e3acc479a2 224 }
mbed_official 157:90e3acc479a2 225
mbed_official 157:90e3acc479a2 226 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 157:90e3acc479a2 227 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 157:90e3acc479a2 228 }
mbed_official 157:90e3acc479a2 229
mbed_official 157:90e3acc479a2 230 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 157:90e3acc479a2 231 pwmout_period_us(obj, ms * 1000);
mbed_official 157:90e3acc479a2 232 }
mbed_official 157:90e3acc479a2 233
mbed_official 157:90e3acc479a2 234 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 157:90e3acc479a2 235 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 236 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 157:90e3acc479a2 237 float dc = pwmout_read(obj);
mbed_official 157:90e3acc479a2 238
mbed_official 227:7bd0639b8911 239 TIM_Cmd(tim, DISABLE);
mbed_official 157:90e3acc479a2 240
mbed_official 157:90e3acc479a2 241 obj->period = us;
mbed_official 157:90e3acc479a2 242
mbed_official 157:90e3acc479a2 243 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
mbed_official 157:90e3acc479a2 244 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 157:90e3acc479a2 245 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 157:90e3acc479a2 246 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 157:90e3acc479a2 247 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 157:90e3acc479a2 248 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 157:90e3acc479a2 249
mbed_official 157:90e3acc479a2 250 // Set duty cycle again
mbed_official 157:90e3acc479a2 251 pwmout_write(obj, dc);
mbed_official 157:90e3acc479a2 252
mbed_official 157:90e3acc479a2 253 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 157:90e3acc479a2 254
mbed_official 157:90e3acc479a2 255 // Warning: Main Output must be enabled on TIM1, TIM8, TIM5, TIM6 and TIM17
mbed_official 157:90e3acc479a2 256 if ((obj->pwm == PWM_1) || (obj->pwm == PWM_15) || (obj->pwm == PWM_16) || (obj->pwm == PWM_17)) {
mbed_official 157:90e3acc479a2 257 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 157:90e3acc479a2 258 }
mbed_official 157:90e3acc479a2 259
mbed_official 157:90e3acc479a2 260 TIM_Cmd(tim, ENABLE);
mbed_official 157:90e3acc479a2 261 }
mbed_official 157:90e3acc479a2 262
mbed_official 157:90e3acc479a2 263 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 157:90e3acc479a2 264 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 157:90e3acc479a2 265 }
mbed_official 157:90e3acc479a2 266
mbed_official 157:90e3acc479a2 267 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 157:90e3acc479a2 268 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 157:90e3acc479a2 269 }
mbed_official 157:90e3acc479a2 270
mbed_official 157:90e3acc479a2 271 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 157:90e3acc479a2 272 float value = (float)us / (float)obj->period;
mbed_official 157:90e3acc479a2 273 pwmout_write(obj, value);
mbed_official 157:90e3acc479a2 274 }