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This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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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Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/pwmout_api.c@414:4ec4c5b614b0, 2014-11-25 (annotated)

Committer:
mbed_official
Date:
Tue Nov 25 07:15:09 2014 +0000
Revision:
414:4ec4c5b614b0
Parent:
402:09075a3b15e3
Child:
489:119543c9f674
Synchronized with git revision fbc74e874ac089c6cb05add312fb5422be628886



Full URL: https://github.com/mbedmicro/mbed/commit/fbc74e874ac089c6cb05add312fb5422be628886/



Targets: NUCLEOs - Add PeripheralPins files for all nucleo targets

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 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 52:a51c77007319 31 #include "pwmout_api.h"
mbed_official 52:a51c77007319 32
mbed_official 174:8bb9f3a33240 33 #if DEVICE_PWMOUT
mbed_official 174:8bb9f3a33240 34
mbed_official 52:a51c77007319 35 #include "cmsis.h"
mbed_official 52:a51c77007319 36 #include "pinmap.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 52:a51c77007319 38
mbed_official 402:09075a3b15e3 39 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 40 {
mbed_official 52:a51c77007319 41 // Get the peripheral name from the pin and assign it to the object
mbed_official 52:a51c77007319 42 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 227:7bd0639b8911 43 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 174:8bb9f3a33240 44
mbed_official 52:a51c77007319 45 // Enable TIM clock
mbed_official 167:d5744491c362 46 if (obj->pwm == PWM_1) RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
mbed_official 52:a51c77007319 47 if (obj->pwm == PWM_2) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
mbed_official 52:a51c77007319 48 if (obj->pwm == PWM_3) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
mbed_official 84:f54042cbc282 49 if (obj->pwm == PWM_4) RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
mbed_official 174:8bb9f3a33240 50
mbed_official 52:a51c77007319 51 // Configure GPIO
mbed_official 52:a51c77007319 52 pinmap_pinout(pin, PinMap_PWM);
mbed_official 174:8bb9f3a33240 53
mbed_official 52:a51c77007319 54 obj->pin = pin;
mbed_official 52:a51c77007319 55 obj->period = 0;
mbed_official 52:a51c77007319 56 obj->pulse = 0;
mbed_official 174:8bb9f3a33240 57
mbed_official 52:a51c77007319 58 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 52:a51c77007319 59 }
mbed_official 52:a51c77007319 60
mbed_official 402:09075a3b15e3 61 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 62 {
mbed_official 208:4557f4bb2dd5 63 // Configure GPIO
mbed_official 208:4557f4bb2dd5 64 pin_function(obj->pin, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 52:a51c77007319 65 }
mbed_official 52:a51c77007319 66
mbed_official 402:09075a3b15e3 67 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 68 {
mbed_official 52:a51c77007319 69 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 70 TIM_OCInitTypeDef TIM_OCInitStructure;
mbed_official 174:8bb9f3a33240 71
mbed_official 52:a51c77007319 72 if (value < 0.0) {
mbed_official 52:a51c77007319 73 value = 0.0;
mbed_official 52:a51c77007319 74 } else if (value > 1.0) {
mbed_official 52:a51c77007319 75 value = 1.0;
mbed_official 52:a51c77007319 76 }
mbed_official 174:8bb9f3a33240 77
mbed_official 52:a51c77007319 78 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 174:8bb9f3a33240 79
mbed_official 167:d5744491c362 80 TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
mbed_official 167:d5744491c362 81 TIM_OCInitStructure.TIM_Pulse = obj->pulse;
mbed_official 167:d5744491c362 82 TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
mbed_official 167:d5744491c362 83 TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
mbed_official 167:d5744491c362 84 TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;
mbed_official 167:d5744491c362 85 TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
mbed_official 52:a51c77007319 86
mbed_official 167:d5744491c362 87 // Configure channels
mbed_official 167:d5744491c362 88 switch (obj->pin) {
mbed_official 167:d5744491c362 89 // Channels 1
mbed_official 167:d5744491c362 90 case PA_6:
mbed_official 167:d5744491c362 91 case PA_8:
mbed_official 167:d5744491c362 92 case PA_15:
mbed_official 167:d5744491c362 93 case PB_4:
mbed_official 174:8bb9f3a33240 94 //case PB_6:
mbed_official 167:d5744491c362 95 case PC_6:
mbed_official 167:d5744491c362 96 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 167:d5744491c362 97 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 98 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 167:d5744491c362 99 break;
mbed_official 167:d5744491c362 100 // Channels 1N
mbed_official 174:8bb9f3a33240 101 //case PA_7:
mbed_official 167:d5744491c362 102 case PB_13:
mbed_official 167:d5744491c362 103 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 167:d5744491c362 104 TIM_OC1PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 105 TIM_OC1Init(tim, &TIM_OCInitStructure);
mbed_official 167:d5744491c362 106 break;
mbed_official 167:d5744491c362 107 // Channels 2
mbed_official 167:d5744491c362 108 case PA_1:
mbed_official 167:d5744491c362 109 case PA_7:
mbed_official 167:d5744491c362 110 case PA_9:
mbed_official 167:d5744491c362 111 case PB_3:
mbed_official 167:d5744491c362 112 case PB_5:
mbed_official 174:8bb9f3a33240 113 //case PB_7:
mbed_official 167:d5744491c362 114 case PC_7:
mbed_official 174:8bb9f3a33240 115 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 167:d5744491c362 116 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 117 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 167:d5744491c362 118 break;
mbed_official 167:d5744491c362 119 // Channels 2N
mbed_official 174:8bb9f3a33240 120 //case PB_0:
mbed_official 167:d5744491c362 121 case PB_14:
mbed_official 174:8bb9f3a33240 122 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 167:d5744491c362 123 TIM_OC2PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 124 TIM_OC2Init(tim, &TIM_OCInitStructure);
mbed_official 174:8bb9f3a33240 125 break;
mbed_official 174:8bb9f3a33240 126 // Channels 3
mbed_official 167:d5744491c362 127 case PA_2:
mbed_official 167:d5744491c362 128 case PA_10:
mbed_official 167:d5744491c362 129 case PB_0:
mbed_official 174:8bb9f3a33240 130 //case PB_8:
mbed_official 167:d5744491c362 131 case PB_10:
mbed_official 167:d5744491c362 132 case PC_8:
mbed_official 167:d5744491c362 133 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 167:d5744491c362 134 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 135 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 167:d5744491c362 136 break;
mbed_official 174:8bb9f3a33240 137 // Channels 3N
mbed_official 174:8bb9f3a33240 138 //case PB_1:
mbed_official 167:d5744491c362 139 case PB_15:
mbed_official 167:d5744491c362 140 TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
mbed_official 167:d5744491c362 141 TIM_OC3PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 142 TIM_OC3Init(tim, &TIM_OCInitStructure);
mbed_official 174:8bb9f3a33240 143 break;
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 174:8bb9f3a33240 148 //case PB_9:
mbed_official 167:d5744491c362 149 case PB_11:
mbed_official 167:d5744491c362 150 case PC_9:
mbed_official 167:d5744491c362 151 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
mbed_official 167:d5744491c362 152 TIM_OC4PreloadConfig(tim, TIM_OCPreload_Enable);
mbed_official 167:d5744491c362 153 TIM_OC4Init(tim, &TIM_OCInitStructure);
mbed_official 174:8bb9f3a33240 154 break;
mbed_official 167:d5744491c362 155 default:
mbed_official 167:d5744491c362 156 return;
mbed_official 52:a51c77007319 157 }
mbed_official 174:8bb9f3a33240 158
mbed_official 167:d5744491c362 159 TIM_CtrlPWMOutputs(tim, ENABLE);
mbed_official 52:a51c77007319 160 }
mbed_official 52:a51c77007319 161
mbed_official 402:09075a3b15e3 162 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 163 {
mbed_official 52:a51c77007319 164 float value = 0;
mbed_official 52:a51c77007319 165 if (obj->period > 0) {
mbed_official 52:a51c77007319 166 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 52:a51c77007319 167 }
mbed_official 52:a51c77007319 168 return ((value > 1.0) ? (1.0) : (value));
mbed_official 52:a51c77007319 169 }
mbed_official 52:a51c77007319 170
mbed_official 402:09075a3b15e3 171 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 172 {
mbed_official 52:a51c77007319 173 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 174 }
mbed_official 52:a51c77007319 175
mbed_official 402:09075a3b15e3 176 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 177 {
mbed_official 52:a51c77007319 178 pwmout_period_us(obj, ms * 1000);
mbed_official 52:a51c77007319 179 }
mbed_official 52:a51c77007319 180
mbed_official 402:09075a3b15e3 181 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 182 {
mbed_official 52:a51c77007319 183 TIM_TypeDef *tim = (TIM_TypeDef *)(obj->pwm);
mbed_official 52:a51c77007319 184 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 52:a51c77007319 185 float dc = pwmout_read(obj);
mbed_official 52:a51c77007319 186
mbed_official 174:8bb9f3a33240 187 TIM_Cmd(tim, DISABLE);
mbed_official 174:8bb9f3a33240 188
mbed_official 52:a51c77007319 189 obj->period = us;
mbed_official 174:8bb9f3a33240 190
mbed_official 174:8bb9f3a33240 191 TIM_TimeBaseStructure.TIM_Period = obj->period - 1;
mbed_official 174:8bb9f3a33240 192 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 52:a51c77007319 193 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 174:8bb9f3a33240 194 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 52:a51c77007319 195 TIM_TimeBaseInit(tim, &TIM_TimeBaseStructure);
mbed_official 52:a51c77007319 196
mbed_official 52:a51c77007319 197 // Set duty cycle again
mbed_official 52:a51c77007319 198 pwmout_write(obj, dc);
mbed_official 174:8bb9f3a33240 199
mbed_official 174:8bb9f3a33240 200 TIM_ARRPreloadConfig(tim, ENABLE);
mbed_official 52:a51c77007319 201 TIM_Cmd(tim, ENABLE);
mbed_official 52:a51c77007319 202 }
mbed_official 52:a51c77007319 203
mbed_official 402:09075a3b15e3 204 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 205 {
mbed_official 52:a51c77007319 206 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 52:a51c77007319 207 }
mbed_official 52:a51c77007319 208
mbed_official 402:09075a3b15e3 209 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 210 {
mbed_official 52:a51c77007319 211 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 52:a51c77007319 212 }
mbed_official 52:a51c77007319 213
mbed_official 402:09075a3b15e3 214 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 215 {
mbed_official 52:a51c77007319 216 float value = (float)us / (float)obj->period;
mbed_official 52:a51c77007319 217 pwmout_write(obj, value);
mbed_official 52:a51c77007319 218 }
mbed_official 174:8bb9f3a33240 219
mbed_official 174:8bb9f3a33240 220 #endif