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_F302R8/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 // TIM2 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_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
ebrus 0:6bc4ac881c8e 42 {PA_1, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM15)}, // TIM15_CH1N
ebrus 0:6bc4ac881c8e 43 {PA_2, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM15)}, // TIM15_CH1
ebrus 0:6bc4ac881c8e 44 {PA_3, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF9_TIM15)}, // TIM15_CH2
ebrus 0:6bc4ac881c8e 45 // {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
ebrus 0:6bc4ac881c8e 46 {PA_6, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1
ebrus 0:6bc4ac881c8e 47 {PA_7, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM17)}, // TIM17_CH1
ebrus 0:6bc4ac881c8e 48 // {PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH1N
ebrus 0:6bc4ac881c8e 49 {PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH1
ebrus 0:6bc4ac881c8e 50 {PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH2
ebrus 0:6bc4ac881c8e 51 // {PA_9, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_TIM2)}, // TIM2_CH3
ebrus 0:6bc4ac881c8e 52 {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH3
ebrus 0:6bc4ac881c8e 53 // {PA_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_TIM2)}, // TIM2_CH4
ebrus 0:6bc4ac881c8e 54 {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF11_TIM1)}, // TIM1_CH4
ebrus 0:6bc4ac881c8e 55 // {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH1N
ebrus 0:6bc4ac881c8e 56 {PA_12, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1
ebrus 0:6bc4ac881c8e 57 // {PA_12, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH2N
ebrus 0:6bc4ac881c8e 58 {PA_13, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1N
ebrus 0:6bc4ac881c8e 59 // {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
ebrus 0:6bc4ac881c8e 60
ebrus 0:6bc4ac881c8e 61 {PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH2N
ebrus 0:6bc4ac881c8e 62 {PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH3N
ebrus 0:6bc4ac881c8e 63 // {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
ebrus 0:6bc4ac881c8e 64 {PB_4, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1
ebrus 0:6bc4ac881c8e 65 {PB_5, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF10_TIM17)},// TIM17_CH1
ebrus 0:6bc4ac881c8e 66 {PB_6, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1N
ebrus 0:6bc4ac881c8e 67 {PB_7, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM17)}, // TIM17_CH1N
ebrus 0:6bc4ac881c8e 68 {PB_8, PWM_16, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM16)}, // TIM16_CH1
ebrus 0:6bc4ac881c8e 69 {PB_9, PWM_17, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM17)}, // TIM17_CH1
ebrus 0:6bc4ac881c8e 70 // {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
ebrus 0:6bc4ac881c8e 71 // {PB_11, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
ebrus 0:6bc4ac881c8e 72 {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH1N
ebrus 0:6bc4ac881c8e 73 {PB_14, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM15)}, // TIM15_CH1
ebrus 0:6bc4ac881c8e 74 // {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH2N
ebrus 0:6bc4ac881c8e 75 {PB_15, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM15)}, // TIM15_CH2
ebrus 0:6bc4ac881c8e 76 // {PB_15, PWM_15, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM15)}, // TIM15_CH1N
ebrus 0:6bc4ac881c8e 77 // {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM1)}, // TIM1_CH3N
ebrus 0:6bc4ac881c8e 78
ebrus 0:6bc4ac881c8e 79 {PC_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH1
ebrus 0:6bc4ac881c8e 80 {PC_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH2
ebrus 0:6bc4ac881c8e 81 {PC_2, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH3
ebrus 0:6bc4ac881c8e 82 {PC_3, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM1)}, // TIM1_CH4
ebrus 0:6bc4ac881c8e 83 {PC_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM1)}, // TIM1_CH1N
ebrus 0:6bc4ac881c8e 84
ebrus 0:6bc4ac881c8e 85 {PF_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM1)}, // TIM1_CH3N
ebrus 0:6bc4ac881c8e 86
ebrus 0:6bc4ac881c8e 87 {NC, NC, 0}
ebrus 0:6bc4ac881c8e 88 };
ebrus 0:6bc4ac881c8e 89
ebrus 0:6bc4ac881c8e 90 static TIM_HandleTypeDef TimHandle;
ebrus 0:6bc4ac881c8e 91
ebrus 0:6bc4ac881c8e 92 void pwmout_init(pwmout_t* obj, PinName pin)
ebrus 0:6bc4ac881c8e 93 {
ebrus 0:6bc4ac881c8e 94 // Get the peripheral name from the pin and assign it to the object
ebrus 0:6bc4ac881c8e 95 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 96
ebrus 0:6bc4ac881c8e 97 if (obj->pwm == (PWMName)NC) {
ebrus 0:6bc4ac881c8e 98 error("PWM error: pinout mapping failed.");
ebrus 0:6bc4ac881c8e 99 }
ebrus 0:6bc4ac881c8e 100
ebrus 0:6bc4ac881c8e 101 // Enable TIM clock
ebrus 0:6bc4ac881c8e 102 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 103 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 104 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 105 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 106 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
ebrus 0:6bc4ac881c8e 107
ebrus 0:6bc4ac881c8e 108 // Configure GPIO
ebrus 0:6bc4ac881c8e 109 pinmap_pinout(pin, PinMap_PWM);
ebrus 0:6bc4ac881c8e 110
ebrus 0:6bc4ac881c8e 111 obj->pin = pin;
ebrus 0:6bc4ac881c8e 112 obj->period = 0;
ebrus 0:6bc4ac881c8e 113 obj->pulse = 0;
ebrus 0:6bc4ac881c8e 114
ebrus 0:6bc4ac881c8e 115 pwmout_period_us(obj, 20000); // 20 ms per default
ebrus 0:6bc4ac881c8e 116 }
ebrus 0:6bc4ac881c8e 117
ebrus 0:6bc4ac881c8e 118 void pwmout_free(pwmout_t* obj)
ebrus 0:6bc4ac881c8e 119 {
ebrus 0:6bc4ac881c8e 120 // Configure GPIO
ebrus 0:6bc4ac881c8e 121 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
ebrus 0:6bc4ac881c8e 122 }
ebrus 0:6bc4ac881c8e 123
ebrus 0:6bc4ac881c8e 124 void pwmout_write(pwmout_t* obj, float value)
ebrus 0:6bc4ac881c8e 125 {
ebrus 0:6bc4ac881c8e 126 TIM_OC_InitTypeDef sConfig;
ebrus 0:6bc4ac881c8e 127 int channel = 0;
ebrus 0:6bc4ac881c8e 128 int complementary_channel = 0;
ebrus 0:6bc4ac881c8e 129
ebrus 0:6bc4ac881c8e 130 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 131
ebrus 0:6bc4ac881c8e 132 if (value < (float)0.0) {
ebrus 0:6bc4ac881c8e 133 value = 0.0;
ebrus 0:6bc4ac881c8e 134 } else if (value > (float)1.0) {
ebrus 0:6bc4ac881c8e 135 value = 1.0;
ebrus 0:6bc4ac881c8e 136 }
ebrus 0:6bc4ac881c8e 137
ebrus 0:6bc4ac881c8e 138 obj->pulse = (uint32_t)((float)obj->period * value);
ebrus 0:6bc4ac881c8e 139
ebrus 0:6bc4ac881c8e 140 // Configure channels
ebrus 0:6bc4ac881c8e 141 sConfig.OCMode = TIM_OCMODE_PWM1;
ebrus 0:6bc4ac881c8e 142 sConfig.Pulse = obj->pulse;
ebrus 0:6bc4ac881c8e 143 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
ebrus 0:6bc4ac881c8e 144 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
ebrus 0:6bc4ac881c8e 145 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
ebrus 0:6bc4ac881c8e 146 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
ebrus 0:6bc4ac881c8e 147 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
ebrus 0:6bc4ac881c8e 148
ebrus 0:6bc4ac881c8e 149 switch (obj->pin) {
ebrus 0:6bc4ac881c8e 150
ebrus 0:6bc4ac881c8e 151 // Channels 1
ebrus 0:6bc4ac881c8e 152 case PA_2:
ebrus 0:6bc4ac881c8e 153 case PA_6:
ebrus 0:6bc4ac881c8e 154 case PA_7:
ebrus 0:6bc4ac881c8e 155 case PA_8:
ebrus 0:6bc4ac881c8e 156 case PA_12:
ebrus 0:6bc4ac881c8e 157 case PB_4:
ebrus 0:6bc4ac881c8e 158 case PB_5:
ebrus 0:6bc4ac881c8e 159 case PB_8:
ebrus 0:6bc4ac881c8e 160 case PB_9:
ebrus 0:6bc4ac881c8e 161 case PB_14:
ebrus 0:6bc4ac881c8e 162 case PC_0:
ebrus 0:6bc4ac881c8e 163 channel = TIM_CHANNEL_1;
ebrus 0:6bc4ac881c8e 164 break;
ebrus 0:6bc4ac881c8e 165
ebrus 0:6bc4ac881c8e 166 // Channels 1N
ebrus 0:6bc4ac881c8e 167 case PA_1:
ebrus 0:6bc4ac881c8e 168 case PA_13:
ebrus 0:6bc4ac881c8e 169 case PB_6:
ebrus 0:6bc4ac881c8e 170 case PB_7:
ebrus 0:6bc4ac881c8e 171 case PB_13:
ebrus 0:6bc4ac881c8e 172 case PC_13:
ebrus 0:6bc4ac881c8e 173 channel = TIM_CHANNEL_1;
ebrus 0:6bc4ac881c8e 174 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 175 break;
ebrus 0:6bc4ac881c8e 176
ebrus 0:6bc4ac881c8e 177 // Channels 2
ebrus 0:6bc4ac881c8e 178 case PA_3:
ebrus 0:6bc4ac881c8e 179 case PA_9:
ebrus 0:6bc4ac881c8e 180 case PB_15:
ebrus 0:6bc4ac881c8e 181 case PC_1:
ebrus 0:6bc4ac881c8e 182 channel = TIM_CHANNEL_2;
ebrus 0:6bc4ac881c8e 183 break;
ebrus 0:6bc4ac881c8e 184
ebrus 0:6bc4ac881c8e 185 // Channels 2N
ebrus 0:6bc4ac881c8e 186 case PB_0:
ebrus 0:6bc4ac881c8e 187 channel = TIM_CHANNEL_2;
ebrus 0:6bc4ac881c8e 188 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 189 break;
ebrus 0:6bc4ac881c8e 190
ebrus 0:6bc4ac881c8e 191 // Channels 3
ebrus 0:6bc4ac881c8e 192 case PA_10:
ebrus 0:6bc4ac881c8e 193 case PC_2:
ebrus 0:6bc4ac881c8e 194 channel = TIM_CHANNEL_3;
ebrus 0:6bc4ac881c8e 195 break;
ebrus 0:6bc4ac881c8e 196
ebrus 0:6bc4ac881c8e 197 // Channels 3N
ebrus 0:6bc4ac881c8e 198 case PB_1:
ebrus 0:6bc4ac881c8e 199 case PF_0:
ebrus 0:6bc4ac881c8e 200 channel = TIM_CHANNEL_3;
ebrus 0:6bc4ac881c8e 201 complementary_channel = 1;
ebrus 0:6bc4ac881c8e 202 break;
ebrus 0:6bc4ac881c8e 203
ebrus 0:6bc4ac881c8e 204 // Channels 4
ebrus 0:6bc4ac881c8e 205 case PA_11:
ebrus 0:6bc4ac881c8e 206 case PC_3:
ebrus 0:6bc4ac881c8e 207 channel = TIM_CHANNEL_4;
ebrus 0:6bc4ac881c8e 208 break;
ebrus 0:6bc4ac881c8e 209
ebrus 0:6bc4ac881c8e 210 default:
ebrus 0:6bc4ac881c8e 211 return;
ebrus 0:6bc4ac881c8e 212 }
ebrus 0:6bc4ac881c8e 213
ebrus 0:6bc4ac881c8e 214 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
ebrus 0:6bc4ac881c8e 215
ebrus 0:6bc4ac881c8e 216 if (complementary_channel) {
ebrus 0:6bc4ac881c8e 217 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
ebrus 0:6bc4ac881c8e 218 } else {
ebrus 0:6bc4ac881c8e 219 HAL_TIM_PWM_Start(&TimHandle, channel);
ebrus 0:6bc4ac881c8e 220 }
ebrus 0:6bc4ac881c8e 221 }
ebrus 0:6bc4ac881c8e 222
ebrus 0:6bc4ac881c8e 223 float pwmout_read(pwmout_t* obj)
ebrus 0:6bc4ac881c8e 224 {
ebrus 0:6bc4ac881c8e 225 float value = 0;
ebrus 0:6bc4ac881c8e 226 if (obj->period > 0) {
ebrus 0:6bc4ac881c8e 227 value = (float)(obj->pulse) / (float)(obj->period);
ebrus 0:6bc4ac881c8e 228 }
ebrus 0:6bc4ac881c8e 229 return ((value > (float)1.0) ? (float)(1.0) : (value));
ebrus 0:6bc4ac881c8e 230 }
ebrus 0:6bc4ac881c8e 231
ebrus 0:6bc4ac881c8e 232 void pwmout_period(pwmout_t* obj, float seconds)
ebrus 0:6bc4ac881c8e 233 {
ebrus 0:6bc4ac881c8e 234 pwmout_period_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 235 }
ebrus 0:6bc4ac881c8e 236
ebrus 0:6bc4ac881c8e 237 void pwmout_period_ms(pwmout_t* obj, int ms)
ebrus 0:6bc4ac881c8e 238 {
ebrus 0:6bc4ac881c8e 239 pwmout_period_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 240 }
ebrus 0:6bc4ac881c8e 241
ebrus 0:6bc4ac881c8e 242 void pwmout_period_us(pwmout_t* obj, int us)
ebrus 0:6bc4ac881c8e 243 {
ebrus 0:6bc4ac881c8e 244 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
ebrus 0:6bc4ac881c8e 245
ebrus 0:6bc4ac881c8e 246 float dc = pwmout_read(obj);
ebrus 0:6bc4ac881c8e 247
ebrus 0:6bc4ac881c8e 248 __HAL_TIM_DISABLE(&TimHandle);
ebrus 0:6bc4ac881c8e 249
ebrus 0:6bc4ac881c8e 250 // Update the SystemCoreClock variable
ebrus 0:6bc4ac881c8e 251 SystemCoreClockUpdate();
ebrus 0:6bc4ac881c8e 252
ebrus 0:6bc4ac881c8e 253 TimHandle.Init.Period = us - 1;
ebrus 0:6bc4ac881c8e 254 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
ebrus 0:6bc4ac881c8e 255 TimHandle.Init.ClockDivision = 0;
ebrus 0:6bc4ac881c8e 256 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
ebrus 0:6bc4ac881c8e 257 HAL_TIM_PWM_Init(&TimHandle);
ebrus 0:6bc4ac881c8e 258
ebrus 0:6bc4ac881c8e 259 // Set duty cycle again
ebrus 0:6bc4ac881c8e 260 pwmout_write(obj, dc);
ebrus 0:6bc4ac881c8e 261
ebrus 0:6bc4ac881c8e 262 // Save for future use
ebrus 0:6bc4ac881c8e 263 obj->period = us;
ebrus 0:6bc4ac881c8e 264
ebrus 0:6bc4ac881c8e 265 __HAL_TIM_ENABLE(&TimHandle);
ebrus 0:6bc4ac881c8e 266 }
ebrus 0:6bc4ac881c8e 267
ebrus 0:6bc4ac881c8e 268 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
ebrus 0:6bc4ac881c8e 269 {
ebrus 0:6bc4ac881c8e 270 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
ebrus 0:6bc4ac881c8e 271 }
ebrus 0:6bc4ac881c8e 272
ebrus 0:6bc4ac881c8e 273 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
ebrus 0:6bc4ac881c8e 274 {
ebrus 0:6bc4ac881c8e 275 pwmout_pulsewidth_us(obj, ms * 1000);
ebrus 0:6bc4ac881c8e 276 }
ebrus 0:6bc4ac881c8e 277
ebrus 0:6bc4ac881c8e 278 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
ebrus 0:6bc4ac881c8e 279 {
ebrus 0:6bc4ac881c8e 280 float value = (float)us / (float)obj->period;
ebrus 0:6bc4ac881c8e 281 pwmout_write(obj, value);
ebrus 0:6bc4ac881c8e 282 }
ebrus 0:6bc4ac881c8e 283
ebrus 0:6bc4ac881c8e 284 #endif