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_F411RE/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?

UserRevisionLine numberNew contents of line
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 "pwmout_api.h"
ebrus 0:6bc4ac881c8e 31
ebrus 0:6bc4ac881c8e 32 #if DEVICE_PWMOUT
ebrus 0:6bc4ac881c8e 33
ebrus 0:6bc4ac881c8e 34 #include "cmsis.h"
ebrus 0:6bc4ac881c8e 35 #include "pinmap.h"
ebrus 0:6bc4ac881c8e 36 #include "mbed_error.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_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
ebrus 0:6bc4ac881c8e 41 // {PA_0, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
ebrus 0:6bc4ac881c8e 42 {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
ebrus 0:6bc4ac881c8e 43 // {PA_1, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
ebrus 0:6bc4ac881c8e 44 {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
ebrus 0:6bc4ac881c8e 45 // {PA_2, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
ebrus 0:6bc4ac881c8e 46 // {PA_2, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
ebrus 0:6bc4ac881c8e 47 {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
ebrus 0:6bc4ac881c8e 48 // {PA_3, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
ebrus 0:6bc4ac881c8e 49 // {PA_3, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
ebrus 0:6bc4ac881c8e 50 {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
ebrus 0:6bc4ac881c8e 51 {PA_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
ebrus 0:6bc4ac881c8e 52 {PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N - ARDUINO
ebrus 0:6bc4ac881c8e 53 // {PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2 - ARDUINO
ebrus 0:6bc4ac881c8e 54 {PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1
ebrus 0:6bc4ac881c8e 55 {PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2
ebrus 0:6bc4ac881c8e 56 {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3
ebrus 0:6bc4ac881c8e 57 {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH4
ebrus 0:6bc4ac881c8e 58 {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
ebrus 0:6bc4ac881c8e 59
ebrus 0:6bc4ac881c8e 60 {PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
ebrus 0:6bc4ac881c8e 61 // {PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
ebrus 0:6bc4ac881c8e 62 {PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
ebrus 0:6bc4ac881c8e 63 // {PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
ebrus 0:6bc4ac881c8e 64 {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2 - ARDUINO
ebrus 0:6bc4ac881c8e 65 {PB_4, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1 - ARDUINO
ebrus 0:6bc4ac881c8e 66 {PB_5, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
ebrus 0:6bc4ac881c8e 67 {PB_6, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH1 - ARDUINO
ebrus 0:6bc4ac881c8e 68 {PB_7, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH2
ebrus 0:6bc4ac881c8e 69 {PB_8, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH3
ebrus 0:6bc4ac881c8e 70 // {PB_8, PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
ebrus 0:6bc4ac881c8e 71 {PB_9, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH4
ebrus 0:6bc4ac881c8e 72 // {PB_9, PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
ebrus 0:6bc4ac881c8e 73 {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3 - ARDUINO
ebrus 0:6bc4ac881c8e 74 {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
ebrus 0:6bc4ac881c8e 75 {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
ebrus 0:6bc4ac881c8e 76 {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
ebrus 0:6bc4ac881c8e 77
ebrus 0:6bc4ac881c8e 78 {PC_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
ebrus 0:6bc4ac881c8e 79 {PC_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2 - ARDUINO
ebrus 0:6bc4ac881c8e 80 {PC_8, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
ebrus 0:6bc4ac881c8e 81 {PC_9, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
ebrus 0:6bc4ac881c8e 82
ebrus 0:6bc4ac881c8e 83 {NC, NC, 0}
ebrus 0:6bc4ac881c8e 84 };
ebrus 0:6bc4ac881c8e 85
ebrus 0:6bc4ac881c8e 86 static TIM_HandleTypeDef TimHandle;
ebrus 0:6bc4ac881c8e 87
ebrus 0:6bc4ac881c8e 88 void pwmout_init(pwmout_t* obj, PinName pin)
ebrus 0:6bc4ac881c8e 89 {
ebrus 0:6bc4ac881c8e 90 // Get the peripheral name from the pin and assign it to the object
ebrus 0:6bc4ac881c8e 91 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 92
ebrus 0:6bc4ac881c8e 93 if (obj->pwm == (PWMName)NC) {
ebrus 0:6bc4ac881c8e 94 error("PWM error: pinout mapping failed.");
ebrus 0:6bc4ac881c8e 95 }
ebrus 0:6bc4ac881c8e 96
ebrus 0:6bc4ac881c8e 97 // Enable TIM clock
ebrus 0:6bc4ac881c8e 98 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 99 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 100 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 101 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 102 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 103 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 104 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 105
ebrus 0:6bc4ac881c8e 106 // Configure GPIO
ebrus 0:6bc4ac881c8e 107 pinmap_pinout(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 108
ebrus 0:6bc4ac881c8e 109 obj->pin = pin;
ebrus 0:6bc4ac881c8e 110 obj->period = 0;
ebrus 0:6bc4ac881c8e 111 obj->pulse = 0;
ebrus 0:6bc4ac881c8e 112
ebrus 0:6bc4ac881c8e 113 pwmout_period_us(obj, 20000); // 20 ms per default
ebrus 0:6bc4ac881c8e 114 }
ebrus 0:6bc4ac881c8e 115
ebrus 0:6bc4ac881c8e 116 void pwmout_free(pwmout_t* obj)
ebrus 0:6bc4ac881c8e 117 {
ebrus 0:6bc4ac881c8e 118 // Configure GPIO
ebrus 0:6bc4ac881c8e 119 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
ebrus 0:6bc4ac881c8e 120 }
ebrus 0:6bc4ac881c8e 121
ebrus 0:6bc4ac881c8e 122 void pwmout_write(pwmout_t* obj, float value)
ebrus 0:6bc4ac881c8e 123 {
ebrus 0:6bc4ac881c8e 124 TIM_OC_InitTypeDef sConfig;
ebrus 0:6bc4ac881c8e 125 int channel = 0;
ebrus 0:6bc4ac881c8e 126 int complementary_channel = 0;
ebrus 0:6bc4ac881c8e 127
ebrus 0:6bc4ac881c8e 128 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 129
ebrus 0:6bc4ac881c8e 130 if (value < (float)0.0) {
ebrus 0:6bc4ac881c8e 131 value = 0.0;
ebrus 0:6bc4ac881c8e 132 } else if (value > (float)1.0) {
ebrus 0:6bc4ac881c8e 133 value = 1.0;
ebrus 0:6bc4ac881c8e 134 }
ebrus 0:6bc4ac881c8e 135
ebrus 0:6bc4ac881c8e 136 obj->pulse = (uint32_t)((float)obj->period * value);
ebrus 0:6bc4ac881c8e 137
ebrus 0:6bc4ac881c8e 138 // Configure channels
ebrus 0:6bc4ac881c8e 139 sConfig.OCMode = TIM_OCMODE_PWM1;
ebrus 0:6bc4ac881c8e 140 sConfig.Pulse = obj->pulse;
ebrus 0:6bc4ac881c8e 141 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
ebrus 0:6bc4ac881c8e 142 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
ebrus 0:6bc4ac881c8e 143 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
ebrus 0:6bc4ac881c8e 144 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
ebrus 0:6bc4ac881c8e 145 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
ebrus 0:6bc4ac881c8e 146
ebrus 0:6bc4ac881c8e 147 switch (obj->pin) {
ebrus 0:6bc4ac881c8e 148
ebrus 0:6bc4ac881c8e 149 // Channels 1
ebrus 0:6bc4ac881c8e 150 case PA_0:
ebrus 0:6bc4ac881c8e 151 case PA_5:
ebrus 0:6bc4ac881c8e 152 case PA_6:
ebrus 0:6bc4ac881c8e 153 case PA_8:
ebrus 0:6bc4ac881c8e 154 case PA_15:
ebrus 0:6bc4ac881c8e 155 case PB_4:
ebrus 0:6bc4ac881c8e 156 case PB_6:
ebrus 0:6bc4ac881c8e 157 case PC_6:
ebrus 0:6bc4ac881c8e 158 channel = TIM_CHANNEL_1;
ebrus 0:6bc4ac881c8e 159 break;
ebrus 0:6bc4ac881c8e 160
ebrus 0:6bc4ac881c8e 161 // Channels 1N
ebrus 0:6bc4ac881c8e 162 case PA_7:
ebrus 0:6bc4ac881c8e 163 case PB_13:
ebrus 0:6bc4ac881c8e 164 channel = TIM_CHANNEL_1;
ebrus 0:6bc4ac881c8e 165 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 166 break;
ebrus 0:6bc4ac881c8e 167
ebrus 0:6bc4ac881c8e 168 // Channels 2
ebrus 0:6bc4ac881c8e 169 case PA_1:
ebrus 0:6bc4ac881c8e 170 case PA_9:
ebrus 0:6bc4ac881c8e 171 case PB_3:
ebrus 0:6bc4ac881c8e 172 case PB_5:
ebrus 0:6bc4ac881c8e 173 case PB_7:
ebrus 0:6bc4ac881c8e 174 case PC_7:
ebrus 0:6bc4ac881c8e 175 channel = TIM_CHANNEL_2;
ebrus 0:6bc4ac881c8e 176 break;
ebrus 0:6bc4ac881c8e 177
ebrus 0:6bc4ac881c8e 178 // Channels 2N
ebrus 0:6bc4ac881c8e 179 case PB_0:
ebrus 0:6bc4ac881c8e 180 case PB_14:
ebrus 0:6bc4ac881c8e 181 channel = TIM_CHANNEL_2;
ebrus 0:6bc4ac881c8e 182 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 183 break;
ebrus 0:6bc4ac881c8e 184
ebrus 0:6bc4ac881c8e 185 // Channels 3
ebrus 0:6bc4ac881c8e 186 case PA_2:
ebrus 0:6bc4ac881c8e 187 case PA_10:
ebrus 0:6bc4ac881c8e 188 case PB_8:
ebrus 0:6bc4ac881c8e 189 case PB_10:
ebrus 0:6bc4ac881c8e 190 case PC_8:
ebrus 0:6bc4ac881c8e 191 channel = TIM_CHANNEL_3;
ebrus 0:6bc4ac881c8e 192 break;
ebrus 0:6bc4ac881c8e 193
ebrus 0:6bc4ac881c8e 194 // Channels 3N
ebrus 0:6bc4ac881c8e 195 case PB_1:
ebrus 0:6bc4ac881c8e 196 case PB_15:
ebrus 0:6bc4ac881c8e 197 channel = TIM_CHANNEL_3;
ebrus 0:6bc4ac881c8e 198 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 199 break;
ebrus 0:6bc4ac881c8e 200
ebrus 0:6bc4ac881c8e 201 // Channels 4
ebrus 0:6bc4ac881c8e 202 case PA_3:
ebrus 0:6bc4ac881c8e 203 case PA_11:
ebrus 0:6bc4ac881c8e 204 case PB_9:
ebrus 0:6bc4ac881c8e 205 case PC_9:
ebrus 0:6bc4ac881c8e 206 channel = TIM_CHANNEL_4;
ebrus 0:6bc4ac881c8e 207 break;
ebrus 0:6bc4ac881c8e 208
ebrus 0:6bc4ac881c8e 209 default:
ebrus 0:6bc4ac881c8e 210 return;
ebrus 0:6bc4ac881c8e 211 }
ebrus 0:6bc4ac881c8e 212
ebrus 0:6bc4ac881c8e 213 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
ebrus 0:6bc4ac881c8e 214 if (complementary_channel) {
ebrus 0:6bc4ac881c8e 215 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
ebrus 0:6bc4ac881c8e 216 } else {
ebrus 0:6bc4ac881c8e 217 HAL_TIM_PWM_Start(&TimHandle, channel);
ebrus 0:6bc4ac881c8e 218 }
ebrus 0:6bc4ac881c8e 219 }
ebrus 0:6bc4ac881c8e 220
ebrus 0:6bc4ac881c8e 221 float pwmout_read(pwmout_t* obj)
ebrus 0:6bc4ac881c8e 222 {
ebrus 0:6bc4ac881c8e 223 float value = 0;
ebrus 0:6bc4ac881c8e 224 if (obj->period > 0) {
ebrus 0:6bc4ac881c8e 225 value = (float)(obj->pulse) / (float)(obj->period);
ebrus 0:6bc4ac881c8e 226 }
ebrus 0:6bc4ac881c8e 227 return ((value > (float)1.0) ? (float)(1.0) : (value));
ebrus 0:6bc4ac881c8e 228 }
ebrus 0:6bc4ac881c8e 229
ebrus 0:6bc4ac881c8e 230 void pwmout_period(pwmout_t* obj, float seconds)
ebrus 0:6bc4ac881c8e 231 {
ebrus 0:6bc4ac881c8e 232 pwmout_period_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 233 }
ebrus 0:6bc4ac881c8e 234
ebrus 0:6bc4ac881c8e 235 void pwmout_period_ms(pwmout_t* obj, int ms)
ebrus 0:6bc4ac881c8e 236 {
ebrus 0:6bc4ac881c8e 237 pwmout_period_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 238 }
ebrus 0:6bc4ac881c8e 239
ebrus 0:6bc4ac881c8e 240 void pwmout_period_us(pwmout_t* obj, int us)
ebrus 0:6bc4ac881c8e 241 {
ebrus 0:6bc4ac881c8e 242 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 243
ebrus 0:6bc4ac881c8e 244 float dc = pwmout_read(obj);
ebrus 0:6bc4ac881c8e 245
ebrus 0:6bc4ac881c8e 246 __HAL_TIM_DISABLE(&TimHandle);
ebrus 0:6bc4ac881c8e 247
ebrus 0:6bc4ac881c8e 248 // Update the SystemCoreClock variable
ebrus 0:6bc4ac881c8e 249 SystemCoreClockUpdate();
ebrus 0:6bc4ac881c8e 250
ebrus 0:6bc4ac881c8e 251 TimHandle.Init.Period = us - 1;
ebrus 0:6bc4ac881c8e 252 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
ebrus 0:6bc4ac881c8e 253 TimHandle.Init.ClockDivision = 0;
ebrus 0:6bc4ac881c8e 254 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
ebrus 0:6bc4ac881c8e 255 HAL_TIM_PWM_Init(&TimHandle);
ebrus 0:6bc4ac881c8e 256
ebrus 0:6bc4ac881c8e 257 // Set duty cycle again
ebrus 0:6bc4ac881c8e 258 pwmout_write(obj, dc);
ebrus 0:6bc4ac881c8e 259
ebrus 0:6bc4ac881c8e 260 // Save for future use
ebrus 0:6bc4ac881c8e 261 obj->period = us;
ebrus 0:6bc4ac881c8e 262
ebrus 0:6bc4ac881c8e 263 __HAL_TIM_ENABLE(&TimHandle);
ebrus 0:6bc4ac881c8e 264 }
ebrus 0:6bc4ac881c8e 265
ebrus 0:6bc4ac881c8e 266 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
ebrus 0:6bc4ac881c8e 267 {
ebrus 0:6bc4ac881c8e 268 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 269 }
ebrus 0:6bc4ac881c8e 270
ebrus 0:6bc4ac881c8e 271 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
ebrus 0:6bc4ac881c8e 272 {
ebrus 0:6bc4ac881c8e 273 pwmout_pulsewidth_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 274 }
ebrus 0:6bc4ac881c8e 275
ebrus 0:6bc4ac881c8e 276 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
ebrus 0:6bc4ac881c8e 277 {
ebrus 0:6bc4ac881c8e 278 float value = (float)us / (float)obj->period;
ebrus 0:6bc4ac881c8e 279 pwmout_write(obj, value);
ebrus 0:6bc4ac881c8e 280 }
ebrus 0:6bc4ac881c8e 281
ebrus 0:6bc4ac881c8e 282 #endif