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targets/hal/TARGET_STM/TARGET_STM32F0/pwmout_api.c@469:fc4922e0c183, 2015-02-09 (annotated)

Committer:
mbed_official
Date:
Mon Feb 09 09:30:07 2015 +0000
Revision:
469:fc4922e0c183
Synchronized with git revision 06e2b3c8802cb4f78e9958ba9923755bd458e8b7



Full URL: https://github.com/mbedmicro/mbed/commit/06e2b3c8802cb4f78e9958ba9923755bd458e8b7/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 469:fc4922e0c183 1 /* mbed Microcontroller Library
mbed_official 469:fc4922e0c183 2 *******************************************************************************
mbed_official 469:fc4922e0c183 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 469:fc4922e0c183 4 * All rights reserved.
mbed_official 469:fc4922e0c183 5 *
mbed_official 469:fc4922e0c183 6 * Redistribution and use in source and binary forms, with or without
mbed_official 469:fc4922e0c183 7 * modification, are permitted provided that the following conditions are met:
mbed_official 469:fc4922e0c183 8 *
mbed_official 469:fc4922e0c183 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 469:fc4922e0c183 10 * this list of conditions and the following disclaimer.
mbed_official 469:fc4922e0c183 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 469:fc4922e0c183 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 469:fc4922e0c183 13 * and/or other materials provided with the distribution.
mbed_official 469:fc4922e0c183 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 469:fc4922e0c183 15 * may be used to endorse or promote products derived from this software
mbed_official 469:fc4922e0c183 16 * without specific prior written permission.
mbed_official 469:fc4922e0c183 17 *
mbed_official 469:fc4922e0c183 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 469:fc4922e0c183 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 469:fc4922e0c183 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 469:fc4922e0c183 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 469:fc4922e0c183 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 469:fc4922e0c183 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 469:fc4922e0c183 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 469:fc4922e0c183 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 469:fc4922e0c183 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 469:fc4922e0c183 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 469:fc4922e0c183 28 *******************************************************************************
mbed_official 469:fc4922e0c183 29 */
mbed_official 469:fc4922e0c183 30 #include "pwmout_api.h"
mbed_official 469:fc4922e0c183 31
mbed_official 469:fc4922e0c183 32 #if DEVICE_PWMOUT
mbed_official 469:fc4922e0c183 33
mbed_official 469:fc4922e0c183 34 #include "cmsis.h"
mbed_official 469:fc4922e0c183 35 #include "pinmap.h"
mbed_official 469:fc4922e0c183 36 #include "mbed_error.h"
mbed_official 469:fc4922e0c183 37 #include "PeripheralPins.h"
mbed_official 469:fc4922e0c183 38
mbed_official 469:fc4922e0c183 39 static TIM_HandleTypeDef TimHandle;
mbed_official 469:fc4922e0c183 40
mbed_official 469:fc4922e0c183 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 469:fc4922e0c183 42 {
mbed_official 469:fc4922e0c183 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 469:fc4922e0c183 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 469:fc4922e0c183 45
mbed_official 469:fc4922e0c183 46 if (obj->pwm == (PWMName)NC) {
mbed_official 469:fc4922e0c183 47 error("PWM error: pinout mapping failed.");
mbed_official 469:fc4922e0c183 48 }
mbed_official 469:fc4922e0c183 49
mbed_official 469:fc4922e0c183 50 // Enable TIM clock
mbed_official 469:fc4922e0c183 51 #if defined(TIM1_BASE)
mbed_official 469:fc4922e0c183 52 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 469:fc4922e0c183 53 #endif
mbed_official 469:fc4922e0c183 54 #if defined(TIM2_BASE)
mbed_official 469:fc4922e0c183 55 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 469:fc4922e0c183 56 #endif
mbed_official 469:fc4922e0c183 57 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 469:fc4922e0c183 58 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 469:fc4922e0c183 59 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
mbed_official 469:fc4922e0c183 60 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
mbed_official 469:fc4922e0c183 61 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
mbed_official 469:fc4922e0c183 62
mbed_official 469:fc4922e0c183 63 // Configure GPIO
mbed_official 469:fc4922e0c183 64 pinmap_pinout(pin, PinMap_PWM);
mbed_official 469:fc4922e0c183 65
mbed_official 469:fc4922e0c183 66 obj->pin = pin;
mbed_official 469:fc4922e0c183 67 obj->period = 0;
mbed_official 469:fc4922e0c183 68 obj->pulse = 0;
mbed_official 469:fc4922e0c183 69
mbed_official 469:fc4922e0c183 70 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 469:fc4922e0c183 71 }
mbed_official 469:fc4922e0c183 72
mbed_official 469:fc4922e0c183 73 void pwmout_free(pwmout_t* obj)
mbed_official 469:fc4922e0c183 74 {
mbed_official 469:fc4922e0c183 75 // Configure GPIO
mbed_official 469:fc4922e0c183 76 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 469:fc4922e0c183 77 }
mbed_official 469:fc4922e0c183 78
mbed_official 469:fc4922e0c183 79 void pwmout_write(pwmout_t* obj, float value)
mbed_official 469:fc4922e0c183 80 {
mbed_official 469:fc4922e0c183 81 TIM_OC_InitTypeDef sConfig;
mbed_official 469:fc4922e0c183 82 int channel = 0;
mbed_official 469:fc4922e0c183 83 int complementary_channel = 0;
mbed_official 469:fc4922e0c183 84
mbed_official 469:fc4922e0c183 85 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 469:fc4922e0c183 86
mbed_official 469:fc4922e0c183 87 if (value < (float)0.0) {
mbed_official 469:fc4922e0c183 88 value = 0.0;
mbed_official 469:fc4922e0c183 89 } else if (value > (float)1.0) {
mbed_official 469:fc4922e0c183 90 value = 1.0;
mbed_official 469:fc4922e0c183 91 }
mbed_official 469:fc4922e0c183 92
mbed_official 469:fc4922e0c183 93 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 469:fc4922e0c183 94
mbed_official 469:fc4922e0c183 95 // Configure channels
mbed_official 469:fc4922e0c183 96 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 469:fc4922e0c183 97 sConfig.Pulse = obj->pulse;
mbed_official 469:fc4922e0c183 98 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 469:fc4922e0c183 99 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 469:fc4922e0c183 100 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 469:fc4922e0c183 101 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 469:fc4922e0c183 102 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 469:fc4922e0c183 103
mbed_official 469:fc4922e0c183 104 #if defined (TARGET_STM32F030R8) || defined (TARGET_STM32F051R8)
mbed_official 469:fc4922e0c183 105 switch (obj->pin) {
mbed_official 469:fc4922e0c183 106 // Channels 1
mbed_official 469:fc4922e0c183 107 case PA_4:
mbed_official 469:fc4922e0c183 108 case PA_6:
mbed_official 469:fc4922e0c183 109 case PB_1:
mbed_official 469:fc4922e0c183 110 case PB_4:
mbed_official 469:fc4922e0c183 111 case PB_8:
mbed_official 469:fc4922e0c183 112 case PB_9:
mbed_official 469:fc4922e0c183 113 case PB_14:
mbed_official 469:fc4922e0c183 114 case PC_6:
mbed_official 469:fc4922e0c183 115 channel = TIM_CHANNEL_1;
mbed_official 469:fc4922e0c183 116 break;
mbed_official 469:fc4922e0c183 117 // Channels 1N
mbed_official 469:fc4922e0c183 118 case PB_6:
mbed_official 469:fc4922e0c183 119 case PB_7:
mbed_official 469:fc4922e0c183 120 channel = TIM_CHANNEL_1;
mbed_official 469:fc4922e0c183 121 complementary_channel = 1;
mbed_official 469:fc4922e0c183 122 break;
mbed_official 469:fc4922e0c183 123 // Channels 2
mbed_official 469:fc4922e0c183 124 case PA_7:
mbed_official 469:fc4922e0c183 125 case PB_5:
mbed_official 469:fc4922e0c183 126 case PB_15:
mbed_official 469:fc4922e0c183 127 case PC_7:
mbed_official 469:fc4922e0c183 128 channel = TIM_CHANNEL_2;
mbed_official 469:fc4922e0c183 129 break;
mbed_official 469:fc4922e0c183 130 // Channels 3
mbed_official 469:fc4922e0c183 131 case PB_0:
mbed_official 469:fc4922e0c183 132 case PC_8:
mbed_official 469:fc4922e0c183 133 channel = TIM_CHANNEL_3;
mbed_official 469:fc4922e0c183 134 break;
mbed_official 469:fc4922e0c183 135 // Channels 4
mbed_official 469:fc4922e0c183 136 case PC_9:
mbed_official 469:fc4922e0c183 137 channel = TIM_CHANNEL_4;
mbed_official 469:fc4922e0c183 138 break;
mbed_official 469:fc4922e0c183 139 default:
mbed_official 469:fc4922e0c183 140 return;
mbed_official 469:fc4922e0c183 141 }
mbed_official 469:fc4922e0c183 142
mbed_official 469:fc4922e0c183 143 #else
mbed_official 469:fc4922e0c183 144 switch (obj->pin) {
mbed_official 469:fc4922e0c183 145 // Channels 1
mbed_official 469:fc4922e0c183 146 case PA_2:
mbed_official 469:fc4922e0c183 147 case PA_4:
mbed_official 469:fc4922e0c183 148 case PA_6:
mbed_official 469:fc4922e0c183 149 case PA_7:
mbed_official 469:fc4922e0c183 150 case PA_8:
mbed_official 469:fc4922e0c183 151 case PB_1:
mbed_official 469:fc4922e0c183 152 case PB_4:
mbed_official 469:fc4922e0c183 153 case PB_8:
mbed_official 469:fc4922e0c183 154 case PB_9:
mbed_official 469:fc4922e0c183 155 case PB_14:
mbed_official 469:fc4922e0c183 156 case PC_6:
mbed_official 469:fc4922e0c183 157 channel = TIM_CHANNEL_1;
mbed_official 469:fc4922e0c183 158 break;
mbed_official 469:fc4922e0c183 159 // Channels 1N
mbed_official 469:fc4922e0c183 160 case PA_1:
mbed_official 469:fc4922e0c183 161 case PB_6:
mbed_official 469:fc4922e0c183 162 case PB_7:
mbed_official 469:fc4922e0c183 163 case PB_13:
mbed_official 469:fc4922e0c183 164 channel = TIM_CHANNEL_1;
mbed_official 469:fc4922e0c183 165 complementary_channel = 1;
mbed_official 469:fc4922e0c183 166 break;
mbed_official 469:fc4922e0c183 167 // Channels 2
mbed_official 469:fc4922e0c183 168 case PA_3:
mbed_official 469:fc4922e0c183 169 case PA_9:
mbed_official 469:fc4922e0c183 170 case PB_5:
mbed_official 469:fc4922e0c183 171 case PB_15:
mbed_official 469:fc4922e0c183 172 case PC_7:
mbed_official 469:fc4922e0c183 173 channel = TIM_CHANNEL_2;
mbed_official 469:fc4922e0c183 174 break;
mbed_official 469:fc4922e0c183 175 // Channels 3
mbed_official 469:fc4922e0c183 176 case PA_10:
mbed_official 469:fc4922e0c183 177 case PB_0:
mbed_official 469:fc4922e0c183 178 case PC_8:
mbed_official 469:fc4922e0c183 179 channel = TIM_CHANNEL_3;
mbed_official 469:fc4922e0c183 180 break;
mbed_official 469:fc4922e0c183 181 // Channels 4
mbed_official 469:fc4922e0c183 182 case PA_11:
mbed_official 469:fc4922e0c183 183 case PC_9:
mbed_official 469:fc4922e0c183 184 channel = TIM_CHANNEL_4;
mbed_official 469:fc4922e0c183 185 break;
mbed_official 469:fc4922e0c183 186 default:
mbed_official 469:fc4922e0c183 187 return;
mbed_official 469:fc4922e0c183 188 }
mbed_official 469:fc4922e0c183 189
mbed_official 469:fc4922e0c183 190 #endif
mbed_official 469:fc4922e0c183 191
mbed_official 469:fc4922e0c183 192 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 469:fc4922e0c183 193
mbed_official 469:fc4922e0c183 194 if (complementary_channel) {
mbed_official 469:fc4922e0c183 195 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 469:fc4922e0c183 196 } else {
mbed_official 469:fc4922e0c183 197 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 469:fc4922e0c183 198 }
mbed_official 469:fc4922e0c183 199 }
mbed_official 469:fc4922e0c183 200
mbed_official 469:fc4922e0c183 201 float pwmout_read(pwmout_t* obj)
mbed_official 469:fc4922e0c183 202 {
mbed_official 469:fc4922e0c183 203 float value = 0;
mbed_official 469:fc4922e0c183 204 if (obj->period > 0) {
mbed_official 469:fc4922e0c183 205 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 469:fc4922e0c183 206 }
mbed_official 469:fc4922e0c183 207 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 469:fc4922e0c183 208 }
mbed_official 469:fc4922e0c183 209
mbed_official 469:fc4922e0c183 210 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 469:fc4922e0c183 211 {
mbed_official 469:fc4922e0c183 212 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 469:fc4922e0c183 213 }
mbed_official 469:fc4922e0c183 214
mbed_official 469:fc4922e0c183 215 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 469:fc4922e0c183 216 {
mbed_official 469:fc4922e0c183 217 pwmout_period_us(obj, ms * 1000);
mbed_official 469:fc4922e0c183 218 }
mbed_official 469:fc4922e0c183 219
mbed_official 469:fc4922e0c183 220 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 469:fc4922e0c183 221 {
mbed_official 469:fc4922e0c183 222 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 469:fc4922e0c183 223
mbed_official 469:fc4922e0c183 224 float dc = pwmout_read(obj);
mbed_official 469:fc4922e0c183 225
mbed_official 469:fc4922e0c183 226 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 469:fc4922e0c183 227
mbed_official 469:fc4922e0c183 228 // Update the SystemCoreClock variable
mbed_official 469:fc4922e0c183 229 SystemCoreClockUpdate();
mbed_official 469:fc4922e0c183 230
mbed_official 469:fc4922e0c183 231 TimHandle.Init.Period = us - 1;
mbed_official 469:fc4922e0c183 232 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 469:fc4922e0c183 233 TimHandle.Init.ClockDivision = 0;
mbed_official 469:fc4922e0c183 234 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 469:fc4922e0c183 235 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 469:fc4922e0c183 236
mbed_official 469:fc4922e0c183 237 // Set duty cycle again
mbed_official 469:fc4922e0c183 238 pwmout_write(obj, dc);
mbed_official 469:fc4922e0c183 239
mbed_official 469:fc4922e0c183 240 // Save for future use
mbed_official 469:fc4922e0c183 241 obj->period = us;
mbed_official 469:fc4922e0c183 242
mbed_official 469:fc4922e0c183 243 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 469:fc4922e0c183 244 }
mbed_official 469:fc4922e0c183 245
mbed_official 469:fc4922e0c183 246 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 469:fc4922e0c183 247 {
mbed_official 469:fc4922e0c183 248 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 469:fc4922e0c183 249 }
mbed_official 469:fc4922e0c183 250
mbed_official 469:fc4922e0c183 251 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 469:fc4922e0c183 252 {
mbed_official 469:fc4922e0c183 253 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 469:fc4922e0c183 254 }
mbed_official 469:fc4922e0c183 255
mbed_official 469:fc4922e0c183 256 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 469:fc4922e0c183 257 {
mbed_official 469:fc4922e0c183 258 float value = (float)us / (float)obj->period;
mbed_official 469:fc4922e0c183 259 pwmout_write(obj, value);
mbed_official 469:fc4922e0c183 260 }
mbed_official 469:fc4922e0c183 261
mbed_official 469:fc4922e0c183 262 #endif