long dao / mbed-src

Mbed for VNG board

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/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 
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 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 *******************************************************************************
mbed_official 219:993c9b0acbcc 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 4 * All rights reserved.
mbed_official 219:993c9b0acbcc 5 *
mbed_official 219:993c9b0acbcc 6 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 7 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 8 *
mbed_official 219:993c9b0acbcc 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 10 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 13 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 15 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 16 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 17 *
mbed_official 219:993c9b0acbcc 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 28 *******************************************************************************
mbed_official 219:993c9b0acbcc 29 */
mbed_official 219:993c9b0acbcc 30 #include "pwmout_api.h"
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 #if DEVICE_PWMOUT
mbed_official 219:993c9b0acbcc 33
mbed_official 219:993c9b0acbcc 34 #include "cmsis.h"
mbed_official 219:993c9b0acbcc 35 #include "pinmap.h"
mbed_official 285:31249416b6f9 36 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 219:993c9b0acbcc 38
mbed_official 219:993c9b0acbcc 39 static TIM_HandleTypeDef TimHandle;
mbed_official 219:993c9b0acbcc 40
mbed_official 402:09075a3b15e3 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 42 {
mbed_official 219:993c9b0acbcc 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 219:993c9b0acbcc 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 45
mbed_official 219:993c9b0acbcc 46 if (obj->pwm == (PWMName)NC) {
mbed_official 219:993c9b0acbcc 47 error("PWM error: pinout mapping failed.");
mbed_official 219:993c9b0acbcc 48 }
mbed_official 219:993c9b0acbcc 49
mbed_official 219:993c9b0acbcc 50 // Enable TIM clock
mbed_official 219:993c9b0acbcc 51 if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 52 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 53 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 54 if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 55 if (obj->pwm == PWM_15) __TIM15_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 56 if (obj->pwm == PWM_16) __TIM16_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 57 if (obj->pwm == PWM_17) __TIM17_CLK_ENABLE();
mbed_official 219:993c9b0acbcc 58
mbed_official 219:993c9b0acbcc 59 // Configure GPIO
mbed_official 219:993c9b0acbcc 60 pinmap_pinout(pin, PinMap_PWM);
mbed_official 219:993c9b0acbcc 61
mbed_official 219:993c9b0acbcc 62 obj->pin = pin;
mbed_official 219:993c9b0acbcc 63 obj->period = 0;
mbed_official 219:993c9b0acbcc 64 obj->pulse = 0;
mbed_official 219:993c9b0acbcc 65
mbed_official 219:993c9b0acbcc 66 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 219:993c9b0acbcc 67 }
mbed_official 219:993c9b0acbcc 68
mbed_official 402:09075a3b15e3 69 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 70 {
mbed_official 219:993c9b0acbcc 71 // Configure GPIO
mbed_official 219:993c9b0acbcc 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 219:993c9b0acbcc 73 }
mbed_official 219:993c9b0acbcc 74
mbed_official 402:09075a3b15e3 75 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 76 {
mbed_official 219:993c9b0acbcc 77 TIM_OC_InitTypeDef sConfig;
mbed_official 219:993c9b0acbcc 78 int channel = 0;
mbed_official 219:993c9b0acbcc 79 int complementary_channel = 0;
mbed_official 219:993c9b0acbcc 80
mbed_official 219:993c9b0acbcc 81 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 82
mbed_official 219:993c9b0acbcc 83 if (value < (float)0.0) {
mbed_official 219:993c9b0acbcc 84 value = 0.0;
mbed_official 219:993c9b0acbcc 85 } else if (value > (float)1.0) {
mbed_official 219:993c9b0acbcc 86 value = 1.0;
mbed_official 219:993c9b0acbcc 87 }
mbed_official 219:993c9b0acbcc 88
mbed_official 219:993c9b0acbcc 89 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 219:993c9b0acbcc 90
mbed_official 219:993c9b0acbcc 91 // Configure channels
mbed_official 219:993c9b0acbcc 92 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 219:993c9b0acbcc 93 sConfig.Pulse = obj->pulse;
mbed_official 219:993c9b0acbcc 94 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 95 sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
mbed_official 219:993c9b0acbcc 96 sConfig.OCFastMode = TIM_OCFAST_DISABLE;
mbed_official 219:993c9b0acbcc 97 sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 98 sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
mbed_official 219:993c9b0acbcc 99
mbed_official 219:993c9b0acbcc 100 switch (obj->pin) {
mbed_official 219:993c9b0acbcc 101 // Channels 1
mbed_official 219:993c9b0acbcc 102 case PA_2:
mbed_official 219:993c9b0acbcc 103 case PA_4:
mbed_official 219:993c9b0acbcc 104 case PA_6:
mbed_official 219:993c9b0acbcc 105 case PA_7:
mbed_official 219:993c9b0acbcc 106 case PA_8:
mbed_official 219:993c9b0acbcc 107 case PB_1:
mbed_official 219:993c9b0acbcc 108 case PB_4:
mbed_official 219:993c9b0acbcc 109 case PB_8:
mbed_official 219:993c9b0acbcc 110 case PB_9:
mbed_official 219:993c9b0acbcc 111 case PB_14:
mbed_official 219:993c9b0acbcc 112 case PC_6:
mbed_official 219:993c9b0acbcc 113 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 114 break;
mbed_official 219:993c9b0acbcc 115 // Channels 1N
mbed_official 219:993c9b0acbcc 116 case PA_1:
mbed_official 219:993c9b0acbcc 117 case PB_6:
mbed_official 219:993c9b0acbcc 118 case PB_7:
mbed_official 219:993c9b0acbcc 119 case PB_13:
mbed_official 219:993c9b0acbcc 120 channel = TIM_CHANNEL_1;
mbed_official 219:993c9b0acbcc 121 complementary_channel = 1;
mbed_official 219:993c9b0acbcc 122 break;
mbed_official 219:993c9b0acbcc 123 // Channels 2
mbed_official 219:993c9b0acbcc 124 case PA_3:
mbed_official 219:993c9b0acbcc 125 case PA_9:
mbed_official 219:993c9b0acbcc 126 case PB_5:
mbed_official 219:993c9b0acbcc 127 case PB_15:
mbed_official 219:993c9b0acbcc 128 case PC_7:
mbed_official 219:993c9b0acbcc 129 channel = TIM_CHANNEL_2;
mbed_official 219:993c9b0acbcc 130 break;
mbed_official 219:993c9b0acbcc 131 // Channels 3
mbed_official 219:993c9b0acbcc 132 case PA_10:
mbed_official 219:993c9b0acbcc 133 case PB_0:
mbed_official 219:993c9b0acbcc 134 case PC_8:
mbed_official 219:993c9b0acbcc 135 channel = TIM_CHANNEL_3;
mbed_official 219:993c9b0acbcc 136 break;
mbed_official 219:993c9b0acbcc 137 // Channels 4
mbed_official 219:993c9b0acbcc 138 case PA_11:
mbed_official 219:993c9b0acbcc 139 case PC_9:
mbed_official 219:993c9b0acbcc 140 channel = TIM_CHANNEL_4;
mbed_official 219:993c9b0acbcc 141 break;
mbed_official 219:993c9b0acbcc 142 default:
mbed_official 219:993c9b0acbcc 143 return;
mbed_official 219:993c9b0acbcc 144 }
mbed_official 219:993c9b0acbcc 145
mbed_official 219:993c9b0acbcc 146 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 219:993c9b0acbcc 147
mbed_official 219:993c9b0acbcc 148 if (complementary_channel) {
mbed_official 219:993c9b0acbcc 149 HAL_TIMEx_PWMN_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 150 } else {
mbed_official 219:993c9b0acbcc 151 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 219:993c9b0acbcc 152 }
mbed_official 219:993c9b0acbcc 153 }
mbed_official 219:993c9b0acbcc 154
mbed_official 402:09075a3b15e3 155 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 156 {
mbed_official 219:993c9b0acbcc 157 float value = 0;
mbed_official 219:993c9b0acbcc 158 if (obj->period > 0) {
mbed_official 219:993c9b0acbcc 159 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 219:993c9b0acbcc 160 }
mbed_official 219:993c9b0acbcc 161 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 219:993c9b0acbcc 162 }
mbed_official 219:993c9b0acbcc 163
mbed_official 402:09075a3b15e3 164 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 165 {
mbed_official 219:993c9b0acbcc 166 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 167 }
mbed_official 219:993c9b0acbcc 168
mbed_official 402:09075a3b15e3 169 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 170 {
mbed_official 219:993c9b0acbcc 171 pwmout_period_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 172 }
mbed_official 219:993c9b0acbcc 173
mbed_official 402:09075a3b15e3 174 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 175 {
mbed_official 219:993c9b0acbcc 176 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 219:993c9b0acbcc 177
mbed_official 219:993c9b0acbcc 178 float dc = pwmout_read(obj);
mbed_official 219:993c9b0acbcc 179
mbed_official 219:993c9b0acbcc 180 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 181
mbed_official 219:993c9b0acbcc 182 // Update the SystemCoreClock variable
mbed_official 219:993c9b0acbcc 183 SystemCoreClockUpdate();
mbed_official 219:993c9b0acbcc 184
mbed_official 219:993c9b0acbcc 185 TimHandle.Init.Period = us - 1;
mbed_official 219:993c9b0acbcc 186 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 219:993c9b0acbcc 187 TimHandle.Init.ClockDivision = 0;
mbed_official 219:993c9b0acbcc 188 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 219:993c9b0acbcc 189 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 219:993c9b0acbcc 190
mbed_official 219:993c9b0acbcc 191 // Set duty cycle again
mbed_official 219:993c9b0acbcc 192 pwmout_write(obj, dc);
mbed_official 219:993c9b0acbcc 193
mbed_official 219:993c9b0acbcc 194 // Save for future use
mbed_official 219:993c9b0acbcc 195 obj->period = us;
mbed_official 219:993c9b0acbcc 196
mbed_official 219:993c9b0acbcc 197 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 219:993c9b0acbcc 198 }
mbed_official 219:993c9b0acbcc 199
mbed_official 402:09075a3b15e3 200 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 201 {
mbed_official 219:993c9b0acbcc 202 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 219:993c9b0acbcc 203 }
mbed_official 219:993c9b0acbcc 204
mbed_official 402:09075a3b15e3 205 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 206 {
mbed_official 219:993c9b0acbcc 207 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 219:993c9b0acbcc 208 }
mbed_official 219:993c9b0acbcc 209
mbed_official 402:09075a3b15e3 210 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 211 {
mbed_official 219:993c9b0acbcc 212 float value = (float)us / (float)obj->period;
mbed_official 219:993c9b0acbcc 213 pwmout_write(obj, value);
mbed_official 219:993c9b0acbcc 214 }
mbed_official 219:993c9b0acbcc 215
mbed_official 219:993c9b0acbcc 216 #endif