tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F3XX/pwmout_api.c

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