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targets/hal/TARGET_STM/TARGET_STM32F3XX/pwmout_api.c@155:8435094ec241, 2014-04-08 (annotated)

Committer:
mbed_official
Date:
Tue Apr 08 09:15:06 2014 +0100
Revision:
155:8435094ec241
Child:
227:7bd0639b8911
Synchronized with git revision d616c415fc62f490b915ff0ff39c8d24b2917c0f



Full URL: https://github.com/mbedmicro/mbed/commit/d616c415fc62f490b915ff0ff39c8d24b2917c0f/



[STM32F3XX] Initial port

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 155:8435094ec241 1 /* mbed Microcontroller Library
mbed_official 155:8435094ec241 2 *******************************************************************************
mbed_official 155:8435094ec241 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 155:8435094ec241 4 * All rights reserved.
mbed_official 155:8435094ec241 5 *
mbed_official 155:8435094ec241 6 * Redistribution and use in source and binary forms, with or without
mbed_official 155:8435094ec241 7 * modification, are permitted provided that the following conditions are met:
mbed_official 155:8435094ec241 8 *
mbed_official 155:8435094ec241 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 155:8435094ec241 10 * this list of conditions and the following disclaimer.
mbed_official 155:8435094ec241 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 155:8435094ec241 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 155:8435094ec241 13 * and/or other materials provided with the distribution.
mbed_official 155:8435094ec241 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 155:8435094ec241 15 * may be used to endorse or promote products derived from this software
mbed_official 155:8435094ec241 16 * without specific prior written permission.
mbed_official 155:8435094ec241 17 *
mbed_official 155:8435094ec241 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 155:8435094ec241 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 155:8435094ec241 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 155:8435094ec241 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 155:8435094ec241 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 155:8435094ec241 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 155:8435094ec241 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 155:8435094ec241 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 155:8435094ec241 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 155:8435094ec241 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 155:8435094ec241 28 *******************************************************************************
mbed_official 155:8435094ec241 29 */
mbed_official 155:8435094ec241 30 #include "pwmout_api.h"
mbed_official 155:8435094ec241 31
mbed_official 155:8435094ec241 32 #include "cmsis.h"
mbed_official 155:8435094ec241 33 #include "pinmap.h"
mbed_official 155:8435094ec241 34 #include "error.h"
mbed_official 155:8435094ec241 35
mbed_official 155:8435094ec241 36 // TIM2 cannot be used because already used by the us_ticker
mbed_official 155:8435094ec241 37 static const PinMap PinMap_PWM[] = {
mbed_official 155:8435094ec241 38 // {PA_0, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 155:8435094ec241 39 // {PA_1, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH2
mbed_official 155:8435094ec241 40 {PA_1, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH1N
mbed_official 155:8435094ec241 41 {PA_2, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH1
mbed_official 155:8435094ec241 42 {PA_3, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_9)}, // TIM15_CH2
mbed_official 155:8435094ec241 43 // {PA_5, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 155:8435094ec241 44 {PA_6, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 155:8435094ec241 45 {PA_7, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1
mbed_official 155:8435094ec241 46 // {PA_7, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 155:8435094ec241 47 {PA_8, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1
mbed_official 155:8435094ec241 48 {PA_9, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2
mbed_official 155:8435094ec241 49 // {PA_9, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM2_CH3
mbed_official 155:8435094ec241 50 {PA_10, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3
mbed_official 155:8435094ec241 51 // {PA_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM2_CH4
mbed_official 155:8435094ec241 52 {PA_11, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_11)}, // TIM1_CH4
mbed_official 155:8435094ec241 53 // {PA_11, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 155:8435094ec241 54 {PA_12, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 155:8435094ec241 55 // {PA_12, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 155:8435094ec241 56 {PA_13, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1N
mbed_official 155:8435094ec241 57 // {PA_15, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH1
mbed_official 155:8435094ec241 58
mbed_official 155:8435094ec241 59 {PB_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 155:8435094ec241 60 {PB_1, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3N
mbed_official 155:8435094ec241 61 // {PB_3, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH2
mbed_official 155:8435094ec241 62 {PB_4, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 155:8435094ec241 63 {PB_5, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_10)}, // TIM17_CH1
mbed_official 155:8435094ec241 64 {PB_6, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1N
mbed_official 155:8435094ec241 65 {PB_7, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1N
mbed_official 155:8435094ec241 66 {PB_8, PWM_16, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM16_CH1
mbed_official 155:8435094ec241 67 {PB_9, PWM_17, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM17_CH1
mbed_official 155:8435094ec241 68 // {PB_10, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH3
mbed_official 155:8435094ec241 69 // {PB_11, PWM_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM2_CH4
mbed_official 155:8435094ec241 70 {PB_13, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH1N
mbed_official 155:8435094ec241 71 {PB_14, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM15_CH1
mbed_official 155:8435094ec241 72 // {PB_14, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH2N
mbed_official 155:8435094ec241 73 {PB_15, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_1)}, // TIM15_CH2
mbed_official 155:8435094ec241 74 // {PB_15, PWM_15, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM15_CH1N
mbed_official 155:8435094ec241 75 // {PB_15, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_4)}, // TIM1_CH3N
mbed_official 155:8435094ec241 76
mbed_official 155:8435094ec241 77 {PC_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH1
mbed_official 155:8435094ec241 78 {PC_1, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH2
mbed_official 155:8435094ec241 79 {PC_2, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH3
mbed_official 155:8435094ec241 80 {PC_3, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_2)}, // TIM1_CH4
mbed_official 155:8435094ec241 81 {PC_13, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_4)}, // TIM1_CH1N
mbed_official 155:8435094ec241 82
mbed_official 155:8435094ec241 83 {PF_0, PWM_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_6)}, // TIM1_CH3N
mbed_official 155:8435094ec241 84
mbed_official 155:8435094ec241 85 {NC, NC, 0}
mbed_official 155:8435094ec241 86 };
mbed_official 155:8435094ec241 87
mbed_official 155:8435094ec241 88 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 155:8435094ec241 89 // Get the peripheral name from the pin and assign it to the object
mbed_official 155:8435094ec241 90 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 155:8435094ec241 91
mbed_official 155:8435094ec241 92 if (obj->pwm == (PWMName)NC) {
mbed_official 155:8435094ec241 93 error("PWM pinout mapping failed");
mbed_official 155:8435094ec241 94 }
mbed_official 155:8435094ec241 95
mbed_official 155:8435094ec241 96 // Enable TIM clock
mbed_official 155:8435094ec241 97 if (obj->pwm == PWM_1) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
mbed_official 155:8435094ec241 98 if (obj->pwm == PWM_15) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM15, ENABLE);
mbed_official 155:8435094ec241 99 if (obj->pwm == PWM_16) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM16, ENABLE);
mbed_official 155:8435094ec241 100 if (obj->pwm == PWM_17) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM17, ENABLE);
mbed_official 155:8435094ec241 101
mbed_official 155:8435094ec241 102 // Configure GPIO
mbed_official 155:8435094ec241 103 pinmap_pinout(pin, PinMap_PWM);
mbed_official 155:8435094ec241 104
mbed_official 155:8435094ec241 105 obj->pin = pin;
mbed_official 155:8435094ec241 106 obj->period = 0;
mbed_official 155:8435094ec241 107 obj->pulse = 0;
mbed_official 155:8435094ec241 108
mbed_official 155:8435094ec241 109 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 155:8435094ec241 110 }
mbed_official 155:8435094ec241 111
mbed_official 155:8435094ec241 112 void pwmout_free(pwmout_t* obj) {
mbed_official 155:8435094ec241 113 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 155:8435094ec241 114 TIM_DeInit(tim);
mbed_official 155:8435094ec241 115 }
mbed_official 155:8435094ec241 116
mbed_official 155:8435094ec241 117 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 155:8435094ec241 118 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 155:8435094ec241 119 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 155:8435094ec241 120
mbed_official 155:8435094ec241 121 if (value < (float)0.0) {
mbed_official 155:8435094ec241 122 value = (float)0.0;
mbed_official 155:8435094ec241 123 } else if (value > (float)1.0) {
mbed_official 155:8435094ec241 124 value = (float)1.0;
mbed_official 155:8435094ec241 125 }
mbed_official 155:8435094ec241 126
mbed_official 155:8435094ec241 127 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 155:8435094ec241 128
mbed_official 155:8435094ec241 129 // Configure channels
mbed_official 155:8435094ec241 130 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 155:8435094ec241 131 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 155:8435094ec241 132 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 155:8435094ec241 133 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCPolarity_High;
mbed_official 155:8435094ec241 134 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 155:8435094ec241 135 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 155:8435094ec241 136
mbed_official 155:8435094ec241 137 switch (obj->pin) {
mbed_official 155:8435094ec241 138 // Channels 1
mbed_official 155:8435094ec241 139 // case PA_0:
mbed_official 155:8435094ec241 140 case PA_2:
mbed_official 155:8435094ec241 141 // case PA_5:
mbed_official 155:8435094ec241 142 case PA_6:
mbed_official 155:8435094ec241 143 case PA_7:
mbed_official 155:8435094ec241 144 case PA_8:
mbed_official 155:8435094ec241 145 case PA_12:
mbed_official 155:8435094ec241 146 // case PA_15:
mbed_official 155:8435094ec241 147 case PB_4:
mbed_official 155:8435094ec241 148 case PB_5:
mbed_official 155:8435094ec241 149 case PB_8:
mbed_official 155:8435094ec241 150 case PB_9:
mbed_official 155:8435094ec241 151 case PB_14:
mbed_official 155:8435094ec241 152 case PC_0:
mbed_official 155:8435094ec241 153 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 155:8435094ec241 154 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 155 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 156 break;
mbed_official 155:8435094ec241 157 // Channels 1N
mbed_official 155:8435094ec241 158 case PA_1:
mbed_official 155:8435094ec241 159 // case PA_7:
mbed_official 155:8435094ec241 160 // case PA_11:
mbed_official 155:8435094ec241 161 case PA_13:
mbed_official 155:8435094ec241 162 case PB_6:
mbed_official 155:8435094ec241 163 case PB_7:
mbed_official 155:8435094ec241 164 case PB_13:
mbed_official 155:8435094ec241 165 // case PB_15:
mbed_official 155:8435094ec241 166 case PC_13:
mbed_official 155:8435094ec241 167 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 155:8435094ec241 168 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 169 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 170 break;
mbed_official 155:8435094ec241 171 // Channels 2
mbed_official 155:8435094ec241 172 // case PA_1:
mbed_official 155:8435094ec241 173 case PA_3:
mbed_official 155:8435094ec241 174 case PA_9:
mbed_official 155:8435094ec241 175 // case PB_3:
mbed_official 155:8435094ec241 176 case PB_15:
mbed_official 155:8435094ec241 177 case PC_1:
mbed_official 155:8435094ec241 178 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 155:8435094ec241 179 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 180 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 181 break;
mbed_official 155:8435094ec241 182 // Channels 2N
mbed_official 155:8435094ec241 183 // case PA_12:
mbed_official 155:8435094ec241 184 case PB_0:
mbed_official 155:8435094ec241 185 // case PB_14:
mbed_official 155:8435094ec241 186 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 155:8435094ec241 187 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 188 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 189 break;
mbed_official 155:8435094ec241 190 // Channels 3
mbed_official 155:8435094ec241 191 // case PA_9:
mbed_official 155:8435094ec241 192 case PA_10:
mbed_official 155:8435094ec241 193 // case PB_10:
mbed_official 155:8435094ec241 194 case PC_2:
mbed_official 155:8435094ec241 195 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 155:8435094ec241 196 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 197 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 198 break;
mbed_official 155:8435094ec241 199 // Channels 3N
mbed_official 155:8435094ec241 200 case PB_1:
mbed_official 155:8435094ec241 201 case PF_0:
mbed_official 155:8435094ec241 202 // case PB_15:
mbed_official 155:8435094ec241 203 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 155:8435094ec241 204 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 205 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 206 break;
mbed_official 155:8435094ec241 207 // Channels 4
mbed_official 155:8435094ec241 208 // case PA_10:
mbed_official 155:8435094ec241 209 case PA_11:
mbed_official 155:8435094ec241 210 // case PB_11:
mbed_official 155:8435094ec241 211 case PC_3:
mbed_official 155:8435094ec241 212 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 155:8435094ec241 213 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 155:8435094ec241 214 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 155:8435094ec241 215 break;
mbed_official 155:8435094ec241 216 default:
mbed_official 155:8435094ec241 217 return;
mbed_official 155:8435094ec241 218 }
mbed_official 155:8435094ec241 219 }
mbed_official 155:8435094ec241 220
mbed_official 155:8435094ec241 221 float pwmout_read(pwmout_t* obj) {
mbed_official 155:8435094ec241 222 float value = 0;
mbed_official 155:8435094ec241 223 if (obj->period > 0) {
mbed_official 155:8435094ec241 224 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 155:8435094ec241 225 }
mbed_official 155:8435094ec241 226 return ((value > (float)1.0) ? ((float)1.0) : (value));
mbed_official 155:8435094ec241 227 }
mbed_official 155:8435094ec241 228
mbed_official 155:8435094ec241 229 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 155:8435094ec241 230 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 155:8435094ec241 231 }
mbed_official 155:8435094ec241 232
mbed_official 155:8435094ec241 233 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 155:8435094ec241 234 pwmout_period_us(obj, ms * 1000);
mbed_official 155:8435094ec241 235 }
mbed_official 155:8435094ec241 236
mbed_official 155:8435094ec241 237 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 155:8435094ec241 238 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 155:8435094ec241 239 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 155:8435094ec241 240 float dc = pwmout_read(obj);
mbed_official 155:8435094ec241 241
mbed_official 155:8435094ec241 242 TIM_Cmd(tim, DISABLE);
mbed_official 155:8435094ec241 243
mbed_official 155:8435094ec241 244 obj->period = us;
mbed_official 155:8435094ec241 245
mbed_official 155:8435094ec241 246 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
mbed_official 155:8435094ec241 247 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 155:8435094ec241 248 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 155:8435094ec241 249 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 155:8435094ec241 250 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 155:8435094ec241 251 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 155:8435094ec241 252
mbed_official 155:8435094ec241 253 // Set duty cycle again
mbed_official 155:8435094ec241 254 pwmout_write(obj, dc);
mbed_official 155:8435094ec241 255
mbed_official 155:8435094ec241 256 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 155:8435094ec241 257
mbed_official 155:8435094ec241 258 // Warning: Main Output must be enabled on TIM1, TIM8, TIM5, TIM6 and TIM17
mbed_official 155:8435094ec241 259 if ((obj->pwm == PWM_1) || (obj->pwm == PWM_15) || (obj->pwm == PWM_16) || (obj->pwm == PWM_17)) {
mbed_official 155:8435094ec241 260 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 155:8435094ec241 261 }
mbed_official 155:8435094ec241 262
mbed_official 155:8435094ec241 263 TIM_Cmd(tim, ENABLE);
mbed_official 155:8435094ec241 264 }
mbed_official 155:8435094ec241 265
mbed_official 155:8435094ec241 266 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 155:8435094ec241 267 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 155:8435094ec241 268 }
mbed_official 155:8435094ec241 269
mbed_official 155:8435094ec241 270 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 155:8435094ec241 271 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 155:8435094ec241 272 }
mbed_official 155:8435094ec241 273
mbed_official 155:8435094ec241 274 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 155:8435094ec241 275 float value = (float)us / (float)obj->period;
mbed_official 155:8435094ec241 276 pwmout_write(obj, value);
mbed_official 155:8435094ec241 277 }