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Dependents:   MX106-finaltest

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targets/hal/TARGET_STM/TARGET_STM32L0/pwmout_api.c@531:47d2b67c511f, 2015-04-30 (annotated)

Committer:
mbed_official
Date:
Thu Apr 30 13:00:08 2015 +0100
Revision:
531:47d2b67c511f
Parent:
491:b97b6b70036c 
Synchronized with git revision 3b811aedb1c127ceaeeaf179a7f1c11c3a1c7956



Full URL: https://github.com/mbedmicro/mbed/commit/3b811aedb1c127ceaeeaf179a7f1c11c3a1c7956/



S130 v1.0 from Nordic. This brings in a lot of BLE4.1 functionality

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 181:a4cbdfbbd2f4 1 /* mbed Microcontroller Library
mbed_official 181:a4cbdfbbd2f4 2 *******************************************************************************
mbed_official 531:47d2b67c511f 3 * Copyright (c) 2015, STMicroelectronics
mbed_official 181:a4cbdfbbd2f4 4 * All rights reserved.
mbed_official 181:a4cbdfbbd2f4 5 *
mbed_official 181:a4cbdfbbd2f4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 181:a4cbdfbbd2f4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 181:a4cbdfbbd2f4 8 *
mbed_official 181:a4cbdfbbd2f4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 10 * this list of conditions and the following disclaimer.
mbed_official 181:a4cbdfbbd2f4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 181:a4cbdfbbd2f4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 181:a4cbdfbbd2f4 13 * and/or other materials provided with the distribution.
mbed_official 181:a4cbdfbbd2f4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 181:a4cbdfbbd2f4 15 * may be used to endorse or promote products derived from this software
mbed_official 181:a4cbdfbbd2f4 16 * without specific prior written permission.
mbed_official 181:a4cbdfbbd2f4 17 *
mbed_official 181:a4cbdfbbd2f4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 181:a4cbdfbbd2f4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 181:a4cbdfbbd2f4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 181:a4cbdfbbd2f4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 181:a4cbdfbbd2f4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 181:a4cbdfbbd2f4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 181:a4cbdfbbd2f4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 181:a4cbdfbbd2f4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 181:a4cbdfbbd2f4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 181:a4cbdfbbd2f4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 181:a4cbdfbbd2f4 28 *******************************************************************************
mbed_official 181:a4cbdfbbd2f4 29 */
mbed_official 181:a4cbdfbbd2f4 30 #include "pwmout_api.h"
mbed_official 181:a4cbdfbbd2f4 31
mbed_official 181:a4cbdfbbd2f4 32 #if DEVICE_PWMOUT
mbed_official 181:a4cbdfbbd2f4 33
mbed_official 181:a4cbdfbbd2f4 34 #include "cmsis.h"
mbed_official 181:a4cbdfbbd2f4 35 #include "pinmap.h"
mbed_official 285:31249416b6f9 36 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 181:a4cbdfbbd2f4 38
mbed_official 181:a4cbdfbbd2f4 39 static TIM_HandleTypeDef TimHandle;
mbed_official 181:a4cbdfbbd2f4 40
mbed_official 402:09075a3b15e3 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 402:09075a3b15e3 42 {
mbed_official 181:a4cbdfbbd2f4 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 531:47d2b67c511f 45 MBED_ASSERT(obj->pwm != (PWMName)NC);
mbed_official 181:a4cbdfbbd2f4 46
mbed_official 531:47d2b67c511f 47 // Get the pin function and assign the used channel to the object
mbed_official 531:47d2b67c511f 48 uint32_t function = pinmap_function(pin, PinMap_PWM);
mbed_official 531:47d2b67c511f 49 MBED_ASSERT(function != (uint32_t)NC);
mbed_official 531:47d2b67c511f 50 obj->channel = STM_PIN_CHANNEL(function);
mbed_official 531:47d2b67c511f 51 obj->inverted = STM_PIN_INVERTED(function);
mbed_official 181:a4cbdfbbd2f4 52
mbed_official 181:a4cbdfbbd2f4 53 // Enable TIM clock
mbed_official 181:a4cbdfbbd2f4 54 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 489:119543c9f674 55 #if defined(TIM3_BASE)
mbed_official 489:119543c9f674 56 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 489:119543c9f674 57 #endif
mbed_official 181:a4cbdfbbd2f4 58 if (obj->pwm == PWM_21) __TIM21_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 59 if (obj->pwm == PWM_22) __TIM22_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 60
mbed_official 181:a4cbdfbbd2f4 61 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 62 pinmap_pinout(pin, PinMap_PWM);
mbed_official 181:a4cbdfbbd2f4 63
mbed_official 181:a4cbdfbbd2f4 64 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 65 obj->period = 0;
mbed_official 181:a4cbdfbbd2f4 66 obj->pulse = 0;
mbed_official 181:a4cbdfbbd2f4 67
mbed_official 181:a4cbdfbbd2f4 68 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 181:a4cbdfbbd2f4 69 }
mbed_official 181:a4cbdfbbd2f4 70
mbed_official 402:09075a3b15e3 71 void pwmout_free(pwmout_t* obj)
mbed_official 402:09075a3b15e3 72 {
mbed_official 181:a4cbdfbbd2f4 73 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 74 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 75 }
mbed_official 181:a4cbdfbbd2f4 76
mbed_official 402:09075a3b15e3 77 void pwmout_write(pwmout_t* obj, float value)
mbed_official 402:09075a3b15e3 78 {
mbed_official 181:a4cbdfbbd2f4 79 TIM_OC_InitTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 80 int channel = 0;
mbed_official 181:a4cbdfbbd2f4 81
mbed_official 181:a4cbdfbbd2f4 82 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 181:a4cbdfbbd2f4 83
mbed_official 181:a4cbdfbbd2f4 84 if (value < (float)0.0) {
mbed_official 181:a4cbdfbbd2f4 85 value = 0.0;
mbed_official 181:a4cbdfbbd2f4 86 } else if (value > (float)1.0) {
mbed_official 181:a4cbdfbbd2f4 87 value = 1.0;
mbed_official 181:a4cbdfbbd2f4 88 }
mbed_official 181:a4cbdfbbd2f4 89
mbed_official 181:a4cbdfbbd2f4 90 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 181:a4cbdfbbd2f4 91
mbed_official 181:a4cbdfbbd2f4 92 // Configure channels
mbed_official 181:a4cbdfbbd2f4 93 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 181:a4cbdfbbd2f4 94 sConfig.Pulse = obj->pulse;
mbed_official 181:a4cbdfbbd2f4 95 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 181:a4cbdfbbd2f4 96 sConfig.OCFastMode = TIM_OCFAST_ENABLE;
mbed_official 181:a4cbdfbbd2f4 97
mbed_official 531:47d2b67c511f 98 switch (obj->channel) {
mbed_official 531:47d2b67c511f 99 case 1:
mbed_official 181:a4cbdfbbd2f4 100 channel = TIM_CHANNEL_1;
mbed_official 181:a4cbdfbbd2f4 101 break;
mbed_official 531:47d2b67c511f 102 case 2:
mbed_official 181:a4cbdfbbd2f4 103 channel = TIM_CHANNEL_2;
mbed_official 181:a4cbdfbbd2f4 104 break;
mbed_official 531:47d2b67c511f 105 case 3:
mbed_official 181:a4cbdfbbd2f4 106 channel = TIM_CHANNEL_3;
mbed_official 181:a4cbdfbbd2f4 107 break;
mbed_official 531:47d2b67c511f 108 case 4:
mbed_official 181:a4cbdfbbd2f4 109 channel = TIM_CHANNEL_4;
mbed_official 181:a4cbdfbbd2f4 110 break;
mbed_official 181:a4cbdfbbd2f4 111 default:
mbed_official 181:a4cbdfbbd2f4 112 return;
mbed_official 181:a4cbdfbbd2f4 113 }
mbed_official 181:a4cbdfbbd2f4 114
mbed_official 531:47d2b67c511f 115 if (HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel) != HAL_OK) {
mbed_official 531:47d2b67c511f 116 error("Cannot initialize PWM");
mbed_official 531:47d2b67c511f 117 }
mbed_official 531:47d2b67c511f 118
mbed_official 181:a4cbdfbbd2f4 119 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 181:a4cbdfbbd2f4 120 }
mbed_official 181:a4cbdfbbd2f4 121
mbed_official 402:09075a3b15e3 122 float pwmout_read(pwmout_t* obj)
mbed_official 402:09075a3b15e3 123 {
mbed_official 181:a4cbdfbbd2f4 124 float value = 0;
mbed_official 181:a4cbdfbbd2f4 125 if (obj->period > 0) {
mbed_official 181:a4cbdfbbd2f4 126 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 181:a4cbdfbbd2f4 127 }
mbed_official 181:a4cbdfbbd2f4 128 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 181:a4cbdfbbd2f4 129 }
mbed_official 181:a4cbdfbbd2f4 130
mbed_official 402:09075a3b15e3 131 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 132 {
mbed_official 181:a4cbdfbbd2f4 133 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 181:a4cbdfbbd2f4 134 }
mbed_official 181:a4cbdfbbd2f4 135
mbed_official 402:09075a3b15e3 136 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 137 {
mbed_official 181:a4cbdfbbd2f4 138 pwmout_period_us(obj, ms * 1000);
mbed_official 181:a4cbdfbbd2f4 139 }
mbed_official 181:a4cbdfbbd2f4 140
mbed_official 402:09075a3b15e3 141 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 142 {
mbed_official 181:a4cbdfbbd2f4 143 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 181:a4cbdfbbd2f4 144
mbed_official 181:a4cbdfbbd2f4 145 float dc = pwmout_read(obj);
mbed_official 181:a4cbdfbbd2f4 146
mbed_official 181:a4cbdfbbd2f4 147 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 181:a4cbdfbbd2f4 148
mbed_official 181:a4cbdfbbd2f4 149 TimHandle.Init.Period = us - 1;
mbed_official 414:4ec4c5b614b0 150 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 181:a4cbdfbbd2f4 151 TimHandle.Init.ClockDivision = 0;
mbed_official 181:a4cbdfbbd2f4 152 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 531:47d2b67c511f 153
mbed_official 531:47d2b67c511f 154 if (HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) {
mbed_official 531:47d2b67c511f 155 error("Cannot initialize PWM");
mbed_official 531:47d2b67c511f 156 }
mbed_official 181:a4cbdfbbd2f4 157
mbed_official 181:a4cbdfbbd2f4 158 // Set duty cycle again
mbed_official 181:a4cbdfbbd2f4 159 pwmout_write(obj, dc);
mbed_official 181:a4cbdfbbd2f4 160
mbed_official 181:a4cbdfbbd2f4 161 // Save for future use
mbed_official 181:a4cbdfbbd2f4 162 obj->period = us;
mbed_official 181:a4cbdfbbd2f4 163
mbed_official 181:a4cbdfbbd2f4 164 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 181:a4cbdfbbd2f4 165 }
mbed_official 181:a4cbdfbbd2f4 166
mbed_official 402:09075a3b15e3 167 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 402:09075a3b15e3 168 {
mbed_official 181:a4cbdfbbd2f4 169 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 181:a4cbdfbbd2f4 170 }
mbed_official 181:a4cbdfbbd2f4 171
mbed_official 402:09075a3b15e3 172 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 402:09075a3b15e3 173 {
mbed_official 181:a4cbdfbbd2f4 174 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 181:a4cbdfbbd2f4 175 }
mbed_official 181:a4cbdfbbd2f4 176
mbed_official 402:09075a3b15e3 177 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 402:09075a3b15e3 178 {
mbed_official 181:a4cbdfbbd2f4 179 float value = (float)us / (float)obj->period;
mbed_official 181:a4cbdfbbd2f4 180 pwmout_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 181 }
mbed_official 181:a4cbdfbbd2f4 182
mbed_official 181:a4cbdfbbd2f4 183 #endif