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targets/hal/TARGET_STM/TARGET_STM32F1/pwmout_api.c@636:b0d178e9fa10, 2016-07-07 (annotated)

Committer:
lzbpli
Date:
Thu Jul 07 06:48:59 2016 +0000
Revision:
636:b0d178e9fa10
Parent:
508:4f5903e025e6 
l053

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 52:a51c77007319 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 52:a51c77007319 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 52:a51c77007319 29 */
mbed_official 52:a51c77007319 30 #include "pwmout_api.h"
mbed_official 52:a51c77007319 31
mbed_official 174:8bb9f3a33240 32 #if DEVICE_PWMOUT
mbed_official 174:8bb9f3a33240 33
mbed_official 52:a51c77007319 34 #include "cmsis.h"
mbed_official 52:a51c77007319 35 #include "pinmap.h"
mbed_official 489:119543c9f674 36 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 52:a51c77007319 38
mbed_official 489:119543c9f674 39 static TIM_HandleTypeDef TimHandle;
mbed_official 489:119543c9f674 40
mbed_official 402:09075a3b15e3 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 42 {
mbed_official 52:a51c77007319 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 52:a51c77007319 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 489:119543c9f674 45
mbed_official 489:119543c9f674 46 if (obj->pwm == (PWMName)NC) {
mbed_official 489:119543c9f674 47 error("PWM error: pinout mapping failed.");
mbed_official 489:119543c9f674 48 }
mbed_official 174:8bb9f3a33240 49
mbed_official 52:a51c77007319 50 // Enable TIM clock
mbed_official 489:119543c9f674 51 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 489:119543c9f674 52 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 489:119543c9f674 53 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 174:8bb9f3a33240 54
mbed_official 52:a51c77007319 55 // Configure GPIO
mbed_official 52:a51c77007319 56 pinmap_pinout(pin, PinMap_PWM);
mbed_official 174:8bb9f3a33240 57
mbed_official 52:a51c77007319 58 obj->pin = pin;
mbed_official 52:a51c77007319 59 obj->period = 0;
mbed_official 52:a51c77007319 60 obj->pulse = 0;
mbed_official 174:8bb9f3a33240 61
mbed_official 52:a51c77007319 62 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 52:a51c77007319 63 }
mbed_official 52:a51c77007319 64
mbed_official 402:09075a3b15e3 65 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 66 {
mbed_official 208:4557f4bb2dd5 67 // Configure GPIO
mbed_official 489:119543c9f674 68 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 52:a51c77007319 69 }
mbed_official 52:a51c77007319 70
mbed_official 402:09075a3b15e3 71 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 72 {
mbed_official 489:119543c9f674 73 TIM_OC_InitTypeDef sConfig;
mbed_official 489:119543c9f674 74 int channel = 0;
mbed_official 489:119543c9f674 75 int complementary_channel = 0;
mbed_official 174:8bb9f3a33240 76
mbed_official 489:119543c9f674 77 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 489:119543c9f674 78
mbed_official 489:119543c9f674 79 if (value < (float)0.0) {
mbed_official 52:a51c77007319 80 value = 0.0;
mbed_official 489:119543c9f674 81 } else if (value > (float)1.0) {
mbed_official 52:a51c77007319 82 value = 1.0;
mbed_official 52:a51c77007319 83 }
mbed_official 174:8bb9f3a33240 84
mbed_official 52:a51c77007319 85 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 174:8bb9f3a33240 86
mbed_official 489:119543c9f674 87 // Configure channels
mbed_official 489:119543c9f674 88 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 489:119543c9f674 89 sConfig.Pulse = obj->pulse;
mbed_official 489:119543c9f674 90 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 489:119543c9f674 91 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 489:119543c9f674 92 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 489:119543c9f674 93 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 489:119543c9f674 94 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 52:a51c77007319 95
mbed_official 167:d5744491c362 96 switch (obj->pin) {
mbed_official 489:119543c9f674 97
mbed_official 167:d5744491c362 98 // Channels 1
mbed_official 167:d5744491c362 99 case PA_6:
mbed_official 167:d5744491c362 100 case PA_8:
mbed_official 167:d5744491c362 101 case PA_15:
mbed_official 167:d5744491c362 102 case PB_4:
mbed_official 167:d5744491c362 103 case PC_6:
mbed_official 489:119543c9f674 104 channel = TIM_CHANNEL_1;
mbed_official 167:d5744491c362 105 break;
mbed_official 489:119543c9f674 106
mbed_official 167:d5744491c362 107 // Channels 1N
mbed_official 167:d5744491c362 108 case PB_13:
mbed_official 489:119543c9f674 109 channel = TIM_CHANNEL_1;
mbed_official 489:119543c9f674 110 complementary_channel = 1;
mbed_official 167:d5744491c362 111 break;
mbed_official 489:119543c9f674 112
mbed_official 167:d5744491c362 113 // Channels 2
mbed_official 167:d5744491c362 114 case PA_1:
mbed_official 167:d5744491c362 115 case PA_7:
mbed_official 167:d5744491c362 116 case PA_9:
mbed_official 167:d5744491c362 117 case PB_3:
mbed_official 167:d5744491c362 118 case PB_5:
mbed_official 167:d5744491c362 119 case PC_7:
mbed_official 489:119543c9f674 120 channel = TIM_CHANNEL_2;
mbed_official 167:d5744491c362 121 break;
mbed_official 489:119543c9f674 122
mbed_official 167:d5744491c362 123 // Channels 2N
mbed_official 167:d5744491c362 124 case PB_14:
mbed_official 489:119543c9f674 125 channel = TIM_CHANNEL_2;
mbed_official 489:119543c9f674 126 complementary_channel = 1;
mbed_official 174:8bb9f3a33240 127 break;
mbed_official 489:119543c9f674 128
mbed_official 174:8bb9f3a33240 129 // Channels 3
mbed_official 167:d5744491c362 130 case PA_2:
mbed_official 167:d5744491c362 131 case PA_10:
mbed_official 167:d5744491c362 132 case PB_0:
mbed_official 167:d5744491c362 133 case PB_10:
mbed_official 167:d5744491c362 134 case PC_8:
mbed_official 489:119543c9f674 135 channel = TIM_CHANNEL_3;
mbed_official 167:d5744491c362 136 break;
mbed_official 489:119543c9f674 137
mbed_official 174:8bb9f3a33240 138 // Channels 3N
mbed_official 167:d5744491c362 139 case PB_15:
mbed_official 489:119543c9f674 140 channel = TIM_CHANNEL_3;
mbed_official 489:119543c9f674 141 complementary_channel = 1;
mbed_official 174:8bb9f3a33240 142 break;
mbed_official 489:119543c9f674 143
mbed_official 174:8bb9f3a33240 144 // Channels 4
mbed_official 167:d5744491c362 145 case PA_3:
mbed_official 167:d5744491c362 146 case PA_11:
mbed_official 167:d5744491c362 147 case PB_1:
mbed_official 167:d5744491c362 148 case PB_11:
mbed_official 167:d5744491c362 149 case PC_9:
mbed_official 489:119543c9f674 150 channel = TIM_CHANNEL_4;
mbed_official 174:8bb9f3a33240 151 break;
mbed_official 489:119543c9f674 152
mbed_official 167:d5744491c362 153 default:
mbed_official 167:d5744491c362 154 return;
mbed_official 52:a51c77007319 155 }
mbed_official 174:8bb9f3a33240 156
mbed_official 489:119543c9f674 157 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 489:119543c9f674 158
mbed_official 489:119543c9f674 159 if (complementary_channel) {
mbed_official 489:119543c9f674 160 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 489:119543c9f674 161 } else {
mbed_official 489:119543c9f674 162 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 489:119543c9f674 163 }
mbed_official 52:a51c77007319 164 }
mbed_official 52:a51c77007319 165
mbed_official 402:09075a3b15e3 166 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 167 {
mbed_official 52:a51c77007319 168 float value = 0;
mbed_official 52:a51c77007319 169 if (obj->period > 0) {
mbed_official 52:a51c77007319 170 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 52:a51c77007319 171 }
mbed_official 489:119543c9f674 172 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 52:a51c77007319 173 }
mbed_official 52:a51c77007319 174
mbed_official 402:09075a3b15e3 175 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 176 {
mbed_official 52:a51c77007319 177 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 178 }
mbed_official 52:a51c77007319 179
mbed_official 402:09075a3b15e3 180 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 181 {
mbed_official 52:a51c77007319 182 pwmout_period_us(obj, ms * 1000);
mbed_official 52:a51c77007319 183 }
mbed_official 52:a51c77007319 184
mbed_official 402:09075a3b15e3 185 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 186 {
mbed_official 489:119543c9f674 187 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 489:119543c9f674 188
mbed_official 52:a51c77007319 189 float dc = pwmout_read(obj);
mbed_official 52:a51c77007319 190
mbed_official 489:119543c9f674 191 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 174:8bb9f3a33240 192
mbed_official 489:119543c9f674 193 // Update the SystemCoreClock variable
mbed_official 489:119543c9f674 194 SystemCoreClockUpdate();
mbed_official 174:8bb9f3a33240 195
mbed_official 489:119543c9f674 196 TimHandle.Init.Period = us - 1;
mbed_official 489:119543c9f674 197 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 489:119543c9f674 198 TimHandle.Init.ClockDivision = 0;
mbed_official 489:119543c9f674 199 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 489:119543c9f674 200 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 52:a51c77007319 201
mbed_official 52:a51c77007319 202 // Set duty cycle again
mbed_official 52:a51c77007319 203 pwmout_write(obj, dc);
mbed_official 174:8bb9f3a33240 204
mbed_official 489:119543c9f674 205 // Save for future use
mbed_official 489:119543c9f674 206 obj->period = us;
mbed_official 489:119543c9f674 207
mbed_official 489:119543c9f674 208 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 52:a51c77007319 209 }
mbed_official 52:a51c77007319 210
mbed_official 402:09075a3b15e3 211 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 212 {
mbed_official 52:a51c77007319 213 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 214 }
mbed_official 52:a51c77007319 215
mbed_official 402:09075a3b15e3 216 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 217 {
mbed_official 52:a51c77007319 218 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 52:a51c77007319 219 }
mbed_official 52:a51c77007319 220
mbed_official 402:09075a3b15e3 221 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 222 {
mbed_official 52:a51c77007319 223 float value = (float)us / (float)obj->period;
mbed_official 52:a51c77007319 224 pwmout_write(obj, value);
mbed_official 52:a51c77007319 225 }
mbed_official 174:8bb9f3a33240 226
mbed_official 174:8bb9f3a33240 227 #endif