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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F429ZI/pwmout_api.c@428:4ddf7f7eabbb, 2014-12-08 (annotated)

Committer:
mbed_official
Date:
Mon Dec 08 07:30:07 2014 +0000
Revision:
428:4ddf7f7eabbb
Parent:
344:ed24f9926218 
Synchronized with git revision 3413e21e59b8b0d03c0addac95b1ead87f0b7965



Full URL: https://github.com/mbedmicro/mbed/commit/3413e21e59b8b0d03c0addac95b1ead87f0b7965/



Gitignore - Ignore cscope and vim swap files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 340:28d1f895c6fe 1 /* mbed Microcontroller Library
mbed_official 340:28d1f895c6fe 2 *******************************************************************************
mbed_official 340:28d1f895c6fe 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 340:28d1f895c6fe 4 * All rights reserved.
mbed_official 340:28d1f895c6fe 5 *
mbed_official 340:28d1f895c6fe 6 * Redistribution and use in source and binary forms, with or without
mbed_official 340:28d1f895c6fe 7 * modification, are permitted provided that the following conditions are met:
mbed_official 340:28d1f895c6fe 8 *
mbed_official 340:28d1f895c6fe 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 340:28d1f895c6fe 10 * this list of conditions and the following disclaimer.
mbed_official 340:28d1f895c6fe 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 340:28d1f895c6fe 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 340:28d1f895c6fe 13 * and/or other materials provided with the distribution.
mbed_official 340:28d1f895c6fe 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 340:28d1f895c6fe 15 * may be used to endorse or promote products derived from this software
mbed_official 340:28d1f895c6fe 16 * without specific prior written permission.
mbed_official 340:28d1f895c6fe 17 *
mbed_official 340:28d1f895c6fe 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 340:28d1f895c6fe 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 340:28d1f895c6fe 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 340:28d1f895c6fe 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 340:28d1f895c6fe 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 340:28d1f895c6fe 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 340:28d1f895c6fe 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 340:28d1f895c6fe 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 340:28d1f895c6fe 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 340:28d1f895c6fe 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 340:28d1f895c6fe 28 *******************************************************************************
mbed_official 340:28d1f895c6fe 29 */
mbed_official 340:28d1f895c6fe 30 #include "pwmout_api.h"
mbed_official 340:28d1f895c6fe 31
mbed_official 340:28d1f895c6fe 32 #if DEVICE_PWMOUT
mbed_official 340:28d1f895c6fe 33
mbed_official 340:28d1f895c6fe 34 #include "cmsis.h"
mbed_official 340:28d1f895c6fe 35 #include "pinmap.h"
mbed_official 340:28d1f895c6fe 36 #include "mbed_error.h"
mbed_official 428:4ddf7f7eabbb 37 #include "PeripheralPins.h"
mbed_official 340:28d1f895c6fe 38
mbed_official 340:28d1f895c6fe 39 static TIM_HandleTypeDef TimHandle;
mbed_official 340:28d1f895c6fe 40
mbed_official 340:28d1f895c6fe 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 340:28d1f895c6fe 42 {
mbed_official 340:28d1f895c6fe 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 340:28d1f895c6fe 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 45
mbed_official 340:28d1f895c6fe 46 if (obj->pwm == (PWMName)NC) {
mbed_official 340:28d1f895c6fe 47 error("PWM error: pinout mapping failed.");
mbed_official 340:28d1f895c6fe 48 }
mbed_official 340:28d1f895c6fe 49
mbed_official 340:28d1f895c6fe 50 // Enable TIM clock
mbed_official 340:28d1f895c6fe 51 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 52 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 53 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 54 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 55 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 56 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 57 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 340:28d1f895c6fe 58
mbed_official 340:28d1f895c6fe 59 // Configure GPIO
mbed_official 340:28d1f895c6fe 60 pinmap_pinout(pin, PinMap_PWM);
mbed_official 340:28d1f895c6fe 61
mbed_official 340:28d1f895c6fe 62 obj->pin = pin;
mbed_official 340:28d1f895c6fe 63 obj->period = 0;
mbed_official 340:28d1f895c6fe 64 obj->pulse = 0;
mbed_official 340:28d1f895c6fe 65
mbed_official 340:28d1f895c6fe 66 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 340:28d1f895c6fe 67 }
mbed_official 340:28d1f895c6fe 68
mbed_official 340:28d1f895c6fe 69 void pwmout_free(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 70 {
mbed_official 340:28d1f895c6fe 71 // Configure GPIO
mbed_official 340:28d1f895c6fe 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 340:28d1f895c6fe 73 }
mbed_official 340:28d1f895c6fe 74
mbed_official 340:28d1f895c6fe 75 void pwmout_write(pwmout_t* obj, float value)
mbed_official 340:28d1f895c6fe 76 {
mbed_official 340:28d1f895c6fe 77 TIM_OC_InitTypeDef sConfig;
mbed_official 340:28d1f895c6fe 78 int channel = 0;
mbed_official 340:28d1f895c6fe 79 int complementary_channel = 0;
mbed_official 340:28d1f895c6fe 80
mbed_official 340:28d1f895c6fe 81 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 340:28d1f895c6fe 82
mbed_official 340:28d1f895c6fe 83 if (value < (float)0.0) {
mbed_official 340:28d1f895c6fe 84 value = 0.0;
mbed_official 340:28d1f895c6fe 85 } else if (value > (float)1.0) {
mbed_official 340:28d1f895c6fe 86 value = 1.0;
mbed_official 340:28d1f895c6fe 87 }
mbed_official 340:28d1f895c6fe 88
mbed_official 340:28d1f895c6fe 89 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 340:28d1f895c6fe 90
mbed_official 340:28d1f895c6fe 91 // Configure channels
mbed_official 340:28d1f895c6fe 92 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 340:28d1f895c6fe 93 sConfig.Pulse = obj->pulse;
mbed_official 340:28d1f895c6fe 94 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 95 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 340:28d1f895c6fe 96 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 340:28d1f895c6fe 97 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 98 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 340:28d1f895c6fe 99
mbed_official 340:28d1f895c6fe 100 switch (obj->pin) {
mbed_official 340:28d1f895c6fe 101
mbed_official 340:28d1f895c6fe 102 // Channels 1
mbed_official 340:28d1f895c6fe 103 case PA_0:
mbed_official 340:28d1f895c6fe 104 case PA_5:
mbed_official 340:28d1f895c6fe 105 case PA_6:
mbed_official 340:28d1f895c6fe 106 case PA_8:
mbed_official 340:28d1f895c6fe 107 case PA_15:
mbed_official 340:28d1f895c6fe 108 case PB_4:
mbed_official 340:28d1f895c6fe 109 case PB_6:
mbed_official 340:28d1f895c6fe 110 case PC_6:
mbed_official 340:28d1f895c6fe 111 channel = TIM_CHANNEL_1;
mbed_official 340:28d1f895c6fe 112 break;
mbed_official 340:28d1f895c6fe 113
mbed_official 340:28d1f895c6fe 114 // Channels 1N
mbed_official 340:28d1f895c6fe 115 case PA_7:
mbed_official 340:28d1f895c6fe 116 case PB_13:
mbed_official 340:28d1f895c6fe 117 channel = TIM_CHANNEL_1;
mbed_official 340:28d1f895c6fe 118 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 119 break;
mbed_official 340:28d1f895c6fe 120
mbed_official 340:28d1f895c6fe 121 // Channels 2
mbed_official 340:28d1f895c6fe 122 case PA_1:
mbed_official 340:28d1f895c6fe 123 case PA_9:
mbed_official 340:28d1f895c6fe 124 case PB_3:
mbed_official 340:28d1f895c6fe 125 case PB_5:
mbed_official 340:28d1f895c6fe 126 case PB_7:
mbed_official 340:28d1f895c6fe 127 case PC_7:
mbed_official 340:28d1f895c6fe 128 channel = TIM_CHANNEL_2;
mbed_official 340:28d1f895c6fe 129 break;
mbed_official 340:28d1f895c6fe 130
mbed_official 340:28d1f895c6fe 131 // Channels 2N
mbed_official 340:28d1f895c6fe 132 case PB_0:
mbed_official 340:28d1f895c6fe 133 case PB_14:
mbed_official 340:28d1f895c6fe 134 channel = TIM_CHANNEL_2;
mbed_official 340:28d1f895c6fe 135 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 136 break;
mbed_official 340:28d1f895c6fe 137
mbed_official 340:28d1f895c6fe 138 // Channels 3
mbed_official 340:28d1f895c6fe 139 case PA_2:
mbed_official 340:28d1f895c6fe 140 case PA_10:
mbed_official 340:28d1f895c6fe 141 case PB_8:
mbed_official 340:28d1f895c6fe 142 case PB_10:
mbed_official 340:28d1f895c6fe 143 case PC_8:
mbed_official 340:28d1f895c6fe 144 channel = TIM_CHANNEL_3;
mbed_official 340:28d1f895c6fe 145 break;
mbed_official 340:28d1f895c6fe 146
mbed_official 340:28d1f895c6fe 147 // Channels 3N
mbed_official 340:28d1f895c6fe 148 case PB_1:
mbed_official 340:28d1f895c6fe 149 case PB_15:
mbed_official 340:28d1f895c6fe 150 channel = TIM_CHANNEL_3;
mbed_official 340:28d1f895c6fe 151 complementary_channel = 1;
mbed_official 340:28d1f895c6fe 152 break;
mbed_official 340:28d1f895c6fe 153
mbed_official 340:28d1f895c6fe 154 // Channels 4
mbed_official 340:28d1f895c6fe 155 case PA_3:
mbed_official 340:28d1f895c6fe 156 case PA_11:
mbed_official 340:28d1f895c6fe 157 case PB_9:
mbed_official 340:28d1f895c6fe 158 case PC_9:
mbed_official 340:28d1f895c6fe 159 channel = TIM_CHANNEL_4;
mbed_official 340:28d1f895c6fe 160 break;
mbed_official 340:28d1f895c6fe 161
mbed_official 340:28d1f895c6fe 162 default:
mbed_official 340:28d1f895c6fe 163 return;
mbed_official 340:28d1f895c6fe 164 }
mbed_official 340:28d1f895c6fe 165
mbed_official 340:28d1f895c6fe 166 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 340:28d1f895c6fe 167 if (complementary_channel) {
mbed_official 340:28d1f895c6fe 168 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 169 } else {
mbed_official 340:28d1f895c6fe 170 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 340:28d1f895c6fe 171 }
mbed_official 340:28d1f895c6fe 172 }
mbed_official 340:28d1f895c6fe 173
mbed_official 340:28d1f895c6fe 174 float pwmout_read(pwmout_t* obj)
mbed_official 340:28d1f895c6fe 175 {
mbed_official 340:28d1f895c6fe 176 float value = 0;
mbed_official 340:28d1f895c6fe 177 if (obj->period > 0) {
mbed_official 340:28d1f895c6fe 178 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 340:28d1f895c6fe 179 }
mbed_official 340:28d1f895c6fe 180 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 340:28d1f895c6fe 181 }
mbed_official 340:28d1f895c6fe 182
mbed_official 340:28d1f895c6fe 183 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 184 {
mbed_official 340:28d1f895c6fe 185 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 186 }
mbed_official 340:28d1f895c6fe 187
mbed_official 340:28d1f895c6fe 188 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 189 {
mbed_official 340:28d1f895c6fe 190 pwmout_period_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 191 }
mbed_official 340:28d1f895c6fe 192
mbed_official 340:28d1f895c6fe 193 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 194 {
mbed_official 340:28d1f895c6fe 195 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 340:28d1f895c6fe 196
mbed_official 340:28d1f895c6fe 197 float dc = pwmout_read(obj);
mbed_official 340:28d1f895c6fe 198
mbed_official 340:28d1f895c6fe 199 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 200
mbed_official 340:28d1f895c6fe 201 // Update the SystemCoreClock variable
mbed_official 340:28d1f895c6fe 202 SystemCoreClockUpdate();
mbed_official 340:28d1f895c6fe 203
mbed_official 340:28d1f895c6fe 204 TimHandle.Init.Period = us - 1;
mbed_official 340:28d1f895c6fe 205 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 340:28d1f895c6fe 206 TimHandle.Init.ClockDivision = 0;
mbed_official 340:28d1f895c6fe 207 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 340:28d1f895c6fe 208 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 340:28d1f895c6fe 209
mbed_official 340:28d1f895c6fe 210 // Set duty cycle again
mbed_official 340:28d1f895c6fe 211 pwmout_write(obj, dc);
mbed_official 340:28d1f895c6fe 212
mbed_official 340:28d1f895c6fe 213 // Save for future use
mbed_official 340:28d1f895c6fe 214 obj->period = us;
mbed_official 340:28d1f895c6fe 215
mbed_official 340:28d1f895c6fe 216 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 340:28d1f895c6fe 217 }
mbed_official 340:28d1f895c6fe 218
mbed_official 340:28d1f895c6fe 219 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 340:28d1f895c6fe 220 {
mbed_official 340:28d1f895c6fe 221 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 340:28d1f895c6fe 222 }
mbed_official 340:28d1f895c6fe 223
mbed_official 340:28d1f895c6fe 224 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 340:28d1f895c6fe 225 {
mbed_official 340:28d1f895c6fe 226 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 340:28d1f895c6fe 227 }
mbed_official 340:28d1f895c6fe 228
mbed_official 340:28d1f895c6fe 229 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 340:28d1f895c6fe 230 {
mbed_official 340:28d1f895c6fe 231 float value = (float)us / (float)obj->period;
mbed_official 340:28d1f895c6fe 232 pwmout_write(obj, value);
mbed_official 340:28d1f895c6fe 233 }
mbed_official 340:28d1f895c6fe 234
mbed_official 340:28d1f895c6fe 235 #endif