Ken Todotani / mbed-src

mbed library sources

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targets/hal/TARGET_STM/TARGET_DISCO_F303VC/pwmout_api.c@157:90e3acc479a2, 2014-04-11 (annotated)

Committer:
mbed_official
Date:
Fri Apr 11 17:15:06 2014 +0100
Revision:
157:90e3acc479a2
Child:
227:7bd0639b8911
Synchronized with git revision 6e20ca17847dceb62132bf3d8519876411e175bf



Full URL: https://github.com/mbedmicro/mbed/commit/6e20ca17847dceb62132bf3d8519876411e175bf/



[STM32F3-Discovery][DISCO_F303VC] initial port.

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 157:90e3acc479a2 30 #include "pwmout_api.h"
mbed_official 157:90e3acc479a2 31
mbed_official 157:90e3acc479a2 32 #include "cmsis.h"
mbed_official 157:90e3acc479a2 33 #include "pinmap.h"
mbed_official 157:90e3acc479a2 34 #include "error.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 157:90e3acc479a2 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 157:90e3acc479a2 91
mbed_official 157:90e3acc479a2 92 if (obj->pwm == (PWMName)NC) {
mbed_official 157:90e3acc479a2 93 error("PWM pinout mapping failed");
mbed_official 157:90e3acc479a2 94 }
mbed_official 157:90e3acc479a2 95
mbed_official 157:90e3acc479a2 96 // Enable TIM clock
mbed_official 157:90e3acc479a2 97 if (obj->pwm == PWM_1) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
mbed_official 157:90e3acc479a2 98 if (obj->pwm == PWM_15) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
mbed_official 157:90e3acc479a2 99 if (obj->pwm == PWM_16) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
mbed_official 157:90e3acc479a2 100 if (obj->pwm == PWM_17) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17, ENABLE);
mbed_official 157:90e3acc479a2 101
mbed_official 157:90e3acc479a2 102 // Configure GPIO
mbed_official 157:90e3acc479a2 103 pinmap_pinout(pin, PinMap_PWM);
mbed_official 157:90e3acc479a2 104
mbed_official 157:90e3acc479a2 105 obj->pin = pin;
mbed_official 157:90e3acc479a2 106 obj->period = 0;
mbed_official 157:90e3acc479a2 107 obj->pulse = 0;
mbed_official 157:90e3acc479a2 108
mbed_official 157:90e3acc479a2 109 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 157:90e3acc479a2 110 }
mbed_official 157:90e3acc479a2 111
mbed_official 157:90e3acc479a2 112 void pwmout_free(pwmout_t* obj) {
mbed_official 157:90e3acc479a2 113 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 114 TIM_DeInit(tim);
mbed_official 157:90e3acc479a2 115 }
mbed_official 157:90e3acc479a2 116
mbed_official 157:90e3acc479a2 117 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 157:90e3acc479a2 118 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 119 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 157:90e3acc479a2 120
mbed_official 157:90e3acc479a2 121 if (value < (float)0.0) {
mbed_official 157:90e3acc479a2 122 value = (float)0.0;
mbed_official 157:90e3acc479a2 123 } else if (value > (float)1.0) {
mbed_official 157:90e3acc479a2 124 value = (float)1.0;
mbed_official 157:90e3acc479a2 125 }
mbed_official 157:90e3acc479a2 126
mbed_official 157:90e3acc479a2 127 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 157:90e3acc479a2 128
mbed_official 157:90e3acc479a2 129 // Configure channels
mbed_official 157:90e3acc479a2 130 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 157:90e3acc479a2 131 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 157:90e3acc479a2 132 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 157:90e3acc479a2 133 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
mbed_official 157:90e3acc479a2 134 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 157:90e3acc479a2 135 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 157:90e3acc479a2 136
mbed_official 157:90e3acc479a2 137 switch (obj->pin) {
mbed_official 157:90e3acc479a2 138 // Channels 1
mbed_official 157:90e3acc479a2 139 // case PA_0:
mbed_official 157:90e3acc479a2 140 case PA_2:
mbed_official 157:90e3acc479a2 141 // case PA_5:
mbed_official 157:90e3acc479a2 142 case PA_6:
mbed_official 157:90e3acc479a2 143 case PA_7:
mbed_official 157:90e3acc479a2 144 case PA_8:
mbed_official 157:90e3acc479a2 145 case PA_12:
mbed_official 157:90e3acc479a2 146 // case PA_15:
mbed_official 157:90e3acc479a2 147 case PB_4:
mbed_official 157:90e3acc479a2 148 case PB_5:
mbed_official 157:90e3acc479a2 149 case PB_8:
mbed_official 157:90e3acc479a2 150 case PB_9:
mbed_official 157:90e3acc479a2 151 case PB_14:
mbed_official 157:90e3acc479a2 152 case PC_0:
mbed_official 157:90e3acc479a2 153 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 154 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 155 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 156 break;
mbed_official 157:90e3acc479a2 157 // Channels 1N
mbed_official 157:90e3acc479a2 158 case PA_1:
mbed_official 157:90e3acc479a2 159 // case PA_7:
mbed_official 157:90e3acc479a2 160 // case PA_11:
mbed_official 157:90e3acc479a2 161 case PA_13:
mbed_official 157:90e3acc479a2 162 case PB_6:
mbed_official 157:90e3acc479a2 163 case PB_7:
mbed_official 157:90e3acc479a2 164 case PB_13:
mbed_official 157:90e3acc479a2 165 // case PB_15:
mbed_official 157:90e3acc479a2 166 case PC_13:
mbed_official 157:90e3acc479a2 167 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 168 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 169 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 170 break;
mbed_official 157:90e3acc479a2 171 // Channels 2
mbed_official 157:90e3acc479a2 172 // case PA_1:
mbed_official 157:90e3acc479a2 173 case PA_3:
mbed_official 157:90e3acc479a2 174 case PA_9:
mbed_official 157:90e3acc479a2 175 // case PB_3:
mbed_official 157:90e3acc479a2 176 case PB_15:
mbed_official 157:90e3acc479a2 177 case PC_1:
mbed_official 157:90e3acc479a2 178 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 179 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 180 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 181 break;
mbed_official 157:90e3acc479a2 182 // Channels 2N
mbed_official 157:90e3acc479a2 183 // case PA_12:
mbed_official 157:90e3acc479a2 184 case PB_0:
mbed_official 157:90e3acc479a2 185 // case PB_14:
mbed_official 157:90e3acc479a2 186 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 187 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 188 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 189 break;
mbed_official 157:90e3acc479a2 190 // Channels 3
mbed_official 157:90e3acc479a2 191 // case PA_9:
mbed_official 157:90e3acc479a2 192 case PA_10:
mbed_official 157:90e3acc479a2 193 // case PB_10:
mbed_official 157:90e3acc479a2 194 case PC_2:
mbed_official 157:90e3acc479a2 195 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 196 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 197 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 198 break;
mbed_official 157:90e3acc479a2 199 // Channels 3N
mbed_official 157:90e3acc479a2 200 case PB_1:
mbed_official 157:90e3acc479a2 201 case PF_0:
mbed_official 157:90e3acc479a2 202 // case PB_15:
mbed_official 157:90e3acc479a2 203 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 157:90e3acc479a2 204 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 205 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 206 break;
mbed_official 157:90e3acc479a2 207 // Channels 4
mbed_official 157:90e3acc479a2 208 // case PA_10:
mbed_official 157:90e3acc479a2 209 case PA_11:
mbed_official 157:90e3acc479a2 210 // case PB_11:
mbed_official 157:90e3acc479a2 211 case PC_3:
mbed_official 157:90e3acc479a2 212 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 157:90e3acc479a2 213 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 157:90e3acc479a2 214 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 157:90e3acc479a2 215 break;
mbed_official 157:90e3acc479a2 216 default:
mbed_official 157:90e3acc479a2 217 return;
mbed_official 157:90e3acc479a2 218 }
mbed_official 157:90e3acc479a2 219 }
mbed_official 157:90e3acc479a2 220
mbed_official 157:90e3acc479a2 221 float pwmout_read(pwmout_t* obj) {
mbed_official 157:90e3acc479a2 222 float value = 0;
mbed_official 157:90e3acc479a2 223 if (obj->period > 0) {
mbed_official 157:90e3acc479a2 224 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 157:90e3acc479a2 225 }
mbed_official 157:90e3acc479a2 226 return ((value > (float)1.0) ? ((float)1.0) : (value));
mbed_official 157:90e3acc479a2 227 }
mbed_official 157:90e3acc479a2 228
mbed_official 157:90e3acc479a2 229 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 157:90e3acc479a2 230 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 157:90e3acc479a2 231 }
mbed_official 157:90e3acc479a2 232
mbed_official 157:90e3acc479a2 233 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 157:90e3acc479a2 234 pwmout_period_us(obj, ms * 1000);
mbed_official 157:90e3acc479a2 235 }
mbed_official 157:90e3acc479a2 236
mbed_official 157:90e3acc479a2 237 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 157:90e3acc479a2 238 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 157:90e3acc479a2 239 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 157:90e3acc479a2 240 float dc = pwmout_read(obj);
mbed_official 157:90e3acc479a2 241
mbed_official 157:90e3acc479a2 242 TIM_Cmd(tim, DISABLE);
mbed_official 157:90e3acc479a2 243
mbed_official 157:90e3acc479a2 244 obj->period = us;
mbed_official 157:90e3acc479a2 245
mbed_official 157:90e3acc479a2 246 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
mbed_official 157:90e3acc479a2 247 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 157:90e3acc479a2 248 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 157:90e3acc479a2 249 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 157:90e3acc479a2 250 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 157:90e3acc479a2 251 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 157:90e3acc479a2 252
mbed_official 157:90e3acc479a2 253 // Set duty cycle again
mbed_official 157:90e3acc479a2 254 pwmout_write(obj, dc);
mbed_official 157:90e3acc479a2 255
mbed_official 157:90e3acc479a2 256 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 157:90e3acc479a2 257
mbed_official 157:90e3acc479a2 258 // Warning: Main Output must be enabled on TIM1, TIM8, TIM5, TIM6 and TIM17
mbed_official 157:90e3acc479a2 259 if ((obj->pwm == PWM_1) || (obj->pwm == PWM_15) || (obj->pwm == PWM_16) || (obj->pwm == PWM_17)) {
mbed_official 157:90e3acc479a2 260 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 157:90e3acc479a2 261 }
mbed_official 157:90e3acc479a2 262
mbed_official 157:90e3acc479a2 263 TIM_Cmd(tim, ENABLE);
mbed_official 157:90e3acc479a2 264 }
mbed_official 157:90e3acc479a2 265
mbed_official 157:90e3acc479a2 266 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 157:90e3acc479a2 267 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 157:90e3acc479a2 268 }
mbed_official 157:90e3acc479a2 269
mbed_official 157:90e3acc479a2 270 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 157:90e3acc479a2 271 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 157:90e3acc479a2 272 }
mbed_official 157:90e3acc479a2 273
mbed_official 157:90e3acc479a2 274 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 157:90e3acc479a2 275 float value = (float)us / (float)obj->period;
mbed_official 157:90e3acc479a2 276 pwmout_write(obj, value);
mbed_official 157:90e3acc479a2 277 }