shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F411RE/pwmout_api.c@250:a49055e7a707, 2014-07-08 (annotated)

Committer:
mbed_official
Date:
Tue Jul 08 11:15:08 2014 +0100
Revision:
250:a49055e7a707
Parent:
235:685d5f11838f
Child:
251:de9a1e4ffd79
Synchronized with git revision 3197042b65f8d28e856e1a7812d45e2fbe80e3f1



Full URL: https://github.com/mbedmicro/mbed/commit/3197042b65f8d28e856e1a7812d45e2fbe80e3f1/



error.h -> mbed_error.h

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 235:685d5f11838f 1 /* mbed Microcontroller Library
mbed_official 235:685d5f11838f 2 *******************************************************************************
mbed_official 235:685d5f11838f 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 235:685d5f11838f 4 * All rights reserved.
mbed_official 235:685d5f11838f 5 *
mbed_official 235:685d5f11838f 6 * Redistribution and use in source and binary forms, with or without
mbed_official 235:685d5f11838f 7 * modification, are permitted provided that the following conditions are met:
mbed_official 235:685d5f11838f 8 *
mbed_official 235:685d5f11838f 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 235:685d5f11838f 10 * this list of conditions and the following disclaimer.
mbed_official 235:685d5f11838f 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 235:685d5f11838f 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 235:685d5f11838f 13 * and/or other materials provided with the distribution.
mbed_official 235:685d5f11838f 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 235:685d5f11838f 15 * may be used to endorse or promote products derived from this software
mbed_official 235:685d5f11838f 16 * without specific prior written permission.
mbed_official 235:685d5f11838f 17 *
mbed_official 235:685d5f11838f 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 235:685d5f11838f 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 235:685d5f11838f 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 235:685d5f11838f 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 235:685d5f11838f 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 235:685d5f11838f 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 235:685d5f11838f 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 235:685d5f11838f 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 235:685d5f11838f 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 235:685d5f11838f 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 235:685d5f11838f 28 *******************************************************************************
mbed_official 235:685d5f11838f 29 */
mbed_official 235:685d5f11838f 30 #include "pwmout_api.h"
mbed_official 235:685d5f11838f 31
mbed_official 235:685d5f11838f 32 #if DEVICE_PWMOUT
mbed_official 235:685d5f11838f 33
mbed_official 235:685d5f11838f 34 #include "cmsis.h"
mbed_official 235:685d5f11838f 35 #include "pinmap.h"
mbed_official 250:a49055e7a707 36 #include "mbed_error.h"
mbed_official 235:685d5f11838f 37
mbed_official 235:685d5f11838f 38 // TIM5 cannot be used because already used by the us_ticker
mbed_official 235:685d5f11838f 39 static const PinMap PinMap_PWM[] = {
mbed_official 235:685d5f11838f 40 {PA_0, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 235:685d5f11838f 41 // {PA_0, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH1
mbed_official 235:685d5f11838f 42 {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2
mbed_official 235:685d5f11838f 43 // {PA_1, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH2
mbed_official 235:685d5f11838f 44 {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3
mbed_official 235:685d5f11838f 45 // {PA_2, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH3
mbed_official 235:685d5f11838f 46 // {PA_2, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH1
mbed_official 235:685d5f11838f 47 {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH4
mbed_official 235:685d5f11838f 48 // {PA_3, PWM_5, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM5)}, // TIM5_CH4
mbed_official 235:685d5f11838f 49 // {PA_3, PWM_9, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM9)}, // TIM9_CH2
mbed_official 235:685d5f11838f 50 {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 235:685d5f11838f 51 {PA_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
mbed_official 235:685d5f11838f 52 {PA_7, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N - ARDUINO
mbed_official 235:685d5f11838f 53 // {PA_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2 - ARDUINO
mbed_official 235:685d5f11838f 54 {PA_8, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1
mbed_official 235:685d5f11838f 55 {PA_9, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2
mbed_official 235:685d5f11838f 56 {PA_10, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3
mbed_official 235:685d5f11838f 57 {PA_11, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH4
mbed_official 235:685d5f11838f 58 {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH1
mbed_official 235:685d5f11838f 59
mbed_official 235:685d5f11838f 60 {PB_0, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
mbed_official 235:685d5f11838f 61 // {PB_0, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
mbed_official 235:685d5f11838f 62 {PB_1, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
mbed_official 235:685d5f11838f 63 // {PB_1, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
mbed_official 235:685d5f11838f 64 {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH2 - ARDUINO
mbed_official 235:685d5f11838f 65 {PB_4, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1 - ARDUINO
mbed_official 235:685d5f11838f 66 {PB_5, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2
mbed_official 235:685d5f11838f 67 {PB_6, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH1 - ARDUINO
mbed_official 235:685d5f11838f 68 {PB_7, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH2
mbed_official 235:685d5f11838f 69 {PB_8, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH3
mbed_official 235:685d5f11838f 70 // {PB_8, PWM_10,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM10)}, // TIM10_CH1
mbed_official 235:685d5f11838f 71 {PB_9, PWM_4, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM4)}, // TIM4_CH4
mbed_official 235:685d5f11838f 72 // {PB_9, PWM_11,STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF3_TIM11)}, // TIM11_CH1
mbed_official 235:685d5f11838f 73 {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM2)}, // TIM2_CH3 - ARDUINO
mbed_official 235:685d5f11838f 74 {PB_13, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH1N
mbed_official 235:685d5f11838f 75 {PB_14, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH2N
mbed_official 235:685d5f11838f 76 {PB_15, PWM_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF1_TIM1)}, // TIM1_CH3N
mbed_official 235:685d5f11838f 77
mbed_official 235:685d5f11838f 78 {PC_6, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH1
mbed_official 235:685d5f11838f 79 {PC_7, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH2 - ARDUINO
mbed_official 235:685d5f11838f 80 {PC_8, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH3
mbed_official 235:685d5f11838f 81 {PC_9, PWM_3, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM3)}, // TIM3_CH4
mbed_official 235:685d5f11838f 82
mbed_official 235:685d5f11838f 83 {NC, NC, 0}
mbed_official 235:685d5f11838f 84 };
mbed_official 235:685d5f11838f 85
mbed_official 235:685d5f11838f 86 static TIM_HandleTypeDef TimHandle;
mbed_official 235:685d5f11838f 87
mbed_official 235:685d5f11838f 88 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 235:685d5f11838f 89 {
mbed_official 235:685d5f11838f 90 // Get the peripheral name from the pin and assign it to the object
mbed_official 235:685d5f11838f 91 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 235:685d5f11838f 92
mbed_official 235:685d5f11838f 93 if (obj->pwm == (PWMName)NC) {
mbed_official 235:685d5f11838f 94 error("PWM error: pinout mapping failed.");
mbed_official 235:685d5f11838f 95 }
mbed_official 235:685d5f11838f 96
mbed_official 235:685d5f11838f 97 // Enable TIM clock
mbed_official 235:685d5f11838f 98 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 235:685d5f11838f 99 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 235:685d5f11838f 100 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 235:685d5f11838f 101 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 235:685d5f11838f 102 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 235:685d5f11838f 103 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 235:685d5f11838f 104 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 235:685d5f11838f 105
mbed_official 235:685d5f11838f 106 // Configure GPIO
mbed_official 235:685d5f11838f 107 pinmap_pinout(pin, PinMap_PWM);
mbed_official 235:685d5f11838f 108
mbed_official 235:685d5f11838f 109 obj->pin = pin;
mbed_official 235:685d5f11838f 110 obj->period = 0;
mbed_official 235:685d5f11838f 111 obj->pulse = 0;
mbed_official 235:685d5f11838f 112
mbed_official 235:685d5f11838f 113 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 235:685d5f11838f 114 }
mbed_official 235:685d5f11838f 115
mbed_official 235:685d5f11838f 116 void pwmout_free(pwmout_t* obj)
mbed_official 235:685d5f11838f 117 {
mbed_official 235:685d5f11838f 118 // Configure GPIO
mbed_official 235:685d5f11838f 119 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 235:685d5f11838f 120 }
mbed_official 235:685d5f11838f 121
mbed_official 235:685d5f11838f 122 void pwmout_write(pwmout_t* obj, float value)
mbed_official 235:685d5f11838f 123 {
mbed_official 235:685d5f11838f 124 TIM_OC_InitTypeDef sConfig;
mbed_official 235:685d5f11838f 125 int channel = 0;
mbed_official 235:685d5f11838f 126 int complementary_channel = 0;
mbed_official 235:685d5f11838f 127
mbed_official 235:685d5f11838f 128 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 235:685d5f11838f 129
mbed_official 235:685d5f11838f 130 if (value < (float)0.0) {
mbed_official 235:685d5f11838f 131 value = 0.0;
mbed_official 235:685d5f11838f 132 } else if (value > (float)1.0) {
mbed_official 235:685d5f11838f 133 value = 1.0;
mbed_official 235:685d5f11838f 134 }
mbed_official 235:685d5f11838f 135
mbed_official 235:685d5f11838f 136 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 235:685d5f11838f 137
mbed_official 235:685d5f11838f 138 // Configure channels
mbed_official 235:685d5f11838f 139 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 235:685d5f11838f 140 sConfig.Pulse = obj->pulse;
mbed_official 235:685d5f11838f 141 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 235:685d5f11838f 142 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 235:685d5f11838f 143 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 235:685d5f11838f 144 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 235:685d5f11838f 145 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 235:685d5f11838f 146
mbed_official 235:685d5f11838f 147 switch (obj->pin) {
mbed_official 235:685d5f11838f 148
mbed_official 235:685d5f11838f 149 // Channels 1
mbed_official 235:685d5f11838f 150 case PA_0:
mbed_official 235:685d5f11838f 151 case PA_5:
mbed_official 235:685d5f11838f 152 case PA_6:
mbed_official 235:685d5f11838f 153 case PA_8:
mbed_official 235:685d5f11838f 154 case PA_15:
mbed_official 235:685d5f11838f 155 case PB_4:
mbed_official 235:685d5f11838f 156 case PB_6:
mbed_official 235:685d5f11838f 157 case PC_6:
mbed_official 235:685d5f11838f 158 channel = TIM_CHANNEL_1;
mbed_official 235:685d5f11838f 159 break;
mbed_official 235:685d5f11838f 160
mbed_official 235:685d5f11838f 161 // Channels 1N
mbed_official 235:685d5f11838f 162 case PA_7:
mbed_official 235:685d5f11838f 163 case PB_13:
mbed_official 235:685d5f11838f 164 channel = TIM_CHANNEL_1;
mbed_official 235:685d5f11838f 165 complementary_channel = 1;
mbed_official 235:685d5f11838f 166 break;
mbed_official 235:685d5f11838f 167
mbed_official 235:685d5f11838f 168 // Channels 2
mbed_official 235:685d5f11838f 169 case PA_1:
mbed_official 235:685d5f11838f 170 case PA_9:
mbed_official 235:685d5f11838f 171 case PB_3:
mbed_official 235:685d5f11838f 172 case PB_5:
mbed_official 235:685d5f11838f 173 case PB_7:
mbed_official 235:685d5f11838f 174 case PC_7:
mbed_official 235:685d5f11838f 175 channel = TIM_CHANNEL_2;
mbed_official 235:685d5f11838f 176 break;
mbed_official 235:685d5f11838f 177
mbed_official 235:685d5f11838f 178 // Channels 2N
mbed_official 235:685d5f11838f 179 case PB_0:
mbed_official 235:685d5f11838f 180 case PB_14:
mbed_official 235:685d5f11838f 181 channel = TIM_CHANNEL_2;
mbed_official 235:685d5f11838f 182 complementary_channel = 1;
mbed_official 235:685d5f11838f 183 break;
mbed_official 235:685d5f11838f 184
mbed_official 235:685d5f11838f 185 // Channels 3
mbed_official 235:685d5f11838f 186 case PA_2:
mbed_official 235:685d5f11838f 187 case PA_10:
mbed_official 235:685d5f11838f 188 case PB_8:
mbed_official 235:685d5f11838f 189 case PB_10:
mbed_official 235:685d5f11838f 190 case PC_8:
mbed_official 235:685d5f11838f 191 channel = TIM_CHANNEL_3;
mbed_official 235:685d5f11838f 192 break;
mbed_official 235:685d5f11838f 193
mbed_official 235:685d5f11838f 194 // Channels 3N
mbed_official 235:685d5f11838f 195 case PB_1:
mbed_official 235:685d5f11838f 196 case PB_15:
mbed_official 235:685d5f11838f 197 channel = TIM_CHANNEL_3;
mbed_official 235:685d5f11838f 198 complementary_channel = 1;
mbed_official 235:685d5f11838f 199 break;
mbed_official 235:685d5f11838f 200
mbed_official 235:685d5f11838f 201 // Channels 4
mbed_official 235:685d5f11838f 202 case PA_3:
mbed_official 235:685d5f11838f 203 case PA_11:
mbed_official 235:685d5f11838f 204 case PB_9:
mbed_official 235:685d5f11838f 205 case PC_9:
mbed_official 235:685d5f11838f 206 channel = TIM_CHANNEL_4;
mbed_official 235:685d5f11838f 207 break;
mbed_official 235:685d5f11838f 208
mbed_official 235:685d5f11838f 209 default:
mbed_official 235:685d5f11838f 210 return;
mbed_official 235:685d5f11838f 211 }
mbed_official 235:685d5f11838f 212
mbed_official 235:685d5f11838f 213 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 235:685d5f11838f 214 if (complementary_channel) {
mbed_official 235:685d5f11838f 215 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 235:685d5f11838f 216 } else {
mbed_official 235:685d5f11838f 217 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 235:685d5f11838f 218 }
mbed_official 235:685d5f11838f 219 }
mbed_official 235:685d5f11838f 220
mbed_official 235:685d5f11838f 221 float pwmout_read(pwmout_t* obj)
mbed_official 235:685d5f11838f 222 {
mbed_official 235:685d5f11838f 223 float value = 0;
mbed_official 235:685d5f11838f 224 if (obj->period > 0) {
mbed_official 235:685d5f11838f 225 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 235:685d5f11838f 226 }
mbed_official 235:685d5f11838f 227 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 235:685d5f11838f 228 }
mbed_official 235:685d5f11838f 229
mbed_official 235:685d5f11838f 230 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 235:685d5f11838f 231 {
mbed_official 235:685d5f11838f 232 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 235:685d5f11838f 233 }
mbed_official 235:685d5f11838f 234
mbed_official 235:685d5f11838f 235 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 235:685d5f11838f 236 {
mbed_official 235:685d5f11838f 237 pwmout_period_us(obj, ms * 1000);
mbed_official 235:685d5f11838f 238 }
mbed_official 235:685d5f11838f 239
mbed_official 235:685d5f11838f 240 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 235:685d5f11838f 241 {
mbed_official 235:685d5f11838f 242 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 235:685d5f11838f 243
mbed_official 235:685d5f11838f 244 float dc = pwmout_read(obj);
mbed_official 235:685d5f11838f 245
mbed_official 235:685d5f11838f 246 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 235:685d5f11838f 247
mbed_official 235:685d5f11838f 248 // Update the SystemCoreClock variable
mbed_official 235:685d5f11838f 249 SystemCoreClockUpdate();
mbed_official 235:685d5f11838f 250
mbed_official 235:685d5f11838f 251 TimHandle.Init.Period = us - 1;
mbed_official 235:685d5f11838f 252 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 235:685d5f11838f 253 TimHandle.Init.ClockDivision = 0;
mbed_official 235:685d5f11838f 254 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 235:685d5f11838f 255 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 235:685d5f11838f 256
mbed_official 235:685d5f11838f 257 // Set duty cycle again
mbed_official 235:685d5f11838f 258 pwmout_write(obj, dc);
mbed_official 235:685d5f11838f 259
mbed_official 235:685d5f11838f 260 // Save for future use
mbed_official 235:685d5f11838f 261 obj->period = us;
mbed_official 235:685d5f11838f 262
mbed_official 235:685d5f11838f 263 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 235:685d5f11838f 264 }
mbed_official 235:685d5f11838f 265
mbed_official 235:685d5f11838f 266 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 235:685d5f11838f 267 {
mbed_official 235:685d5f11838f 268 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 235:685d5f11838f 269 }
mbed_official 235:685d5f11838f 270
mbed_official 235:685d5f11838f 271 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 235:685d5f11838f 272 {
mbed_official 235:685d5f11838f 273 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 235:685d5f11838f 274 }
mbed_official 235:685d5f11838f 275
mbed_official 235:685d5f11838f 276 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 235:685d5f11838f 277 {
mbed_official 235:685d5f11838f 278 float value = (float)us / (float)obj->period;
mbed_official 235:685d5f11838f 279 pwmout_write(obj, value);
mbed_official 235:685d5f11838f 280 }
mbed_official 235:685d5f11838f 281
mbed_official 235:685d5f11838f 282 #endif