shinichi nakazawa / mbed-src

mbed library sources

Dependents:   Nucleo_blink_led

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32L1/pwmout_api.c@496:543871686697, 2015-03-24 (annotated)

Committer:
mbed_official
Date:
Tue Mar 24 09:00:08 2015 +0000
Revision:
496:543871686697
Parent:
targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/pwmout_api.c@414:4ec4c5b614b0 
Synchronized with git revision ea01d61fa18430564b78226045b196bb6bf6b66a



Full URL: https://github.com/mbedmicro/mbed/commit/ea01d61fa18430564b78226045b196bb6bf6b66a/



NUCLEO_L152RE - reorg hal

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "pwmout_api.h"
mbed_official 76:aeb1df146756 31
mbed_official 174:8bb9f3a33240 32 #if DEVICE_PWMOUT
mbed_official 174:8bb9f3a33240 33
mbed_official 76:aeb1df146756 34 #include "cmsis.h"
mbed_official 76:aeb1df146756 35 #include "pinmap.h"
mbed_official 354:e67efb2aab0e 36 #include "mbed_error.h"
mbed_official 414:4ec4c5b614b0 37 #include "PeripheralPins.h"
mbed_official 76:aeb1df146756 38
mbed_official 354:e67efb2aab0e 39 static TIM_HandleTypeDef TimHandle;
mbed_official 354:e67efb2aab0e 40
mbed_official 354:e67efb2aab0e 41 void pwmout_init(pwmout_t* obj, PinName pin)
mbed_official 354:e67efb2aab0e 42 {
mbed_official 76:aeb1df146756 43 // Get the peripheral name from the pin and assign it to the object
mbed_official 76:aeb1df146756 44 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 354:e67efb2aab0e 45
mbed_official 354:e67efb2aab0e 46 if (obj->pwm == (PWMName)NC) {
mbed_official 354:e67efb2aab0e 47 error("PWM error: pinout mapping failed.");
mbed_official 354:e67efb2aab0e 48 }
mbed_official 174:8bb9f3a33240 49
mbed_official 76:aeb1df146756 50 // Enable TIM clock
mbed_official 354:e67efb2aab0e 51 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 52 if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 53 if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 54 if (obj->pwm == PWM_5) __TIM5_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 55 if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 56 if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE();
mbed_official 354:e67efb2aab0e 57 if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE();
mbed_official 174:8bb9f3a33240 58
mbed_official 76:aeb1df146756 59 // Configure GPIO
mbed_official 76:aeb1df146756 60 pinmap_pinout(pin, PinMap_PWM);
mbed_official 174:8bb9f3a33240 61
mbed_official 76:aeb1df146756 62 obj->pin = pin;
mbed_official 76:aeb1df146756 63 obj->period = 0;
mbed_official 76:aeb1df146756 64 obj->pulse = 0;
mbed_official 174:8bb9f3a33240 65
mbed_official 76:aeb1df146756 66 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 76:aeb1df146756 67 }
mbed_official 76:aeb1df146756 68
mbed_official 354:e67efb2aab0e 69 void pwmout_free(pwmout_t* obj)
mbed_official 354:e67efb2aab0e 70 {
mbed_official 354:e67efb2aab0e 71 // Configure GPIO
mbed_official 354:e67efb2aab0e 72 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 76:aeb1df146756 73 }
mbed_official 76:aeb1df146756 74
mbed_official 354:e67efb2aab0e 75 void pwmout_write(pwmout_t* obj, float value)
mbed_official 354:e67efb2aab0e 76 {
mbed_official 354:e67efb2aab0e 77 TIM_OC_InitTypeDef sConfig;
mbed_official 354:e67efb2aab0e 78 int channel = 0;
mbed_official 129:0182c99221bc 79
mbed_official 354:e67efb2aab0e 80 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 354:e67efb2aab0e 81
mbed_official 354:e67efb2aab0e 82 if (value < (float)0.0) {
mbed_official 76:aeb1df146756 83 value = 0.0;
mbed_official 354:e67efb2aab0e 84 } else if (value > (float)1.0) {
mbed_official 76:aeb1df146756 85 value = 1.0;
mbed_official 76:aeb1df146756 86 }
mbed_official 174:8bb9f3a33240 87
mbed_official 76:aeb1df146756 88 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 174:8bb9f3a33240 89
mbed_official 354:e67efb2aab0e 90 // Configure channels
mbed_official 354:e67efb2aab0e 91 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 354:e67efb2aab0e 92 sConfig.Pulse = obj->pulse;
mbed_official 354:e67efb2aab0e 93 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 354:e67efb2aab0e 94 sConfig.OCFastMode = TIM_OCFAST_ENABLE;
mbed_official 76:aeb1df146756 95
mbed_official 129:0182c99221bc 96 switch (obj->pin) {
mbed_official 129:0182c99221bc 97 // Channels 1
mbed_official 129:0182c99221bc 98 case PA_6:
mbed_official 129:0182c99221bc 99 case PB_4:
mbed_official 129:0182c99221bc 100 case PB_6:
mbed_official 129:0182c99221bc 101 case PB_12:
mbed_official 129:0182c99221bc 102 case PB_13:
mbed_official 129:0182c99221bc 103 case PB_15:
mbed_official 129:0182c99221bc 104 case PC_6:
mbed_official 354:e67efb2aab0e 105 channel = TIM_CHANNEL_1;
mbed_official 129:0182c99221bc 106 break;
mbed_official 129:0182c99221bc 107 // Channels 2
mbed_official 129:0182c99221bc 108 case PA_1:
mbed_official 129:0182c99221bc 109 case PA_7:
mbed_official 129:0182c99221bc 110 case PB_3:
mbed_official 129:0182c99221bc 111 case PB_5:
mbed_official 129:0182c99221bc 112 case PB_7:
mbed_official 129:0182c99221bc 113 case PB_14:
mbed_official 129:0182c99221bc 114 case PC_7:
mbed_official 354:e67efb2aab0e 115 channel = TIM_CHANNEL_2;
mbed_official 129:0182c99221bc 116 break;
mbed_official 129:0182c99221bc 117 // Channels 3
mbed_official 129:0182c99221bc 118 case PA_2:
mbed_official 129:0182c99221bc 119 case PB_0:
mbed_official 129:0182c99221bc 120 case PB_8:
mbed_official 129:0182c99221bc 121 case PB_10:
mbed_official 129:0182c99221bc 122 case PC_8:
mbed_official 354:e67efb2aab0e 123 channel = TIM_CHANNEL_3;
mbed_official 129:0182c99221bc 124 break;
mbed_official 129:0182c99221bc 125 // Channels 4
mbed_official 129:0182c99221bc 126 case PA_3:
mbed_official 129:0182c99221bc 127 case PB_1:
mbed_official 129:0182c99221bc 128 case PB_9:
mbed_official 129:0182c99221bc 129 case PB_11:
mbed_official 129:0182c99221bc 130 case PC_9:
mbed_official 354:e67efb2aab0e 131 channel = TIM_CHANNEL_4;
mbed_official 174:8bb9f3a33240 132 break;
mbed_official 129:0182c99221bc 133 default:
mbed_official 129:0182c99221bc 134 return;
mbed_official 76:aeb1df146756 135 }
mbed_official 354:e67efb2aab0e 136
mbed_official 354:e67efb2aab0e 137 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 354:e67efb2aab0e 138 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 76:aeb1df146756 139 }
mbed_official 76:aeb1df146756 140
mbed_official 354:e67efb2aab0e 141 float pwmout_read(pwmout_t* obj)
mbed_official 354:e67efb2aab0e 142 {
mbed_official 76:aeb1df146756 143 float value = 0;
mbed_official 76:aeb1df146756 144 if (obj->period > 0) {
mbed_official 76:aeb1df146756 145 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 76:aeb1df146756 146 }
mbed_official 354:e67efb2aab0e 147 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 76:aeb1df146756 148 }
mbed_official 76:aeb1df146756 149
mbed_official 354:e67efb2aab0e 150 void pwmout_period(pwmout_t* obj, float seconds)
mbed_official 354:e67efb2aab0e 151 {
mbed_official 76:aeb1df146756 152 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 76:aeb1df146756 153 }
mbed_official 76:aeb1df146756 154
mbed_official 354:e67efb2aab0e 155 void pwmout_period_ms(pwmout_t* obj, int ms)
mbed_official 354:e67efb2aab0e 156 {
mbed_official 76:aeb1df146756 157 pwmout_period_us(obj, ms * 1000);
mbed_official 76:aeb1df146756 158 }
mbed_official 76:aeb1df146756 159
mbed_official 354:e67efb2aab0e 160 void pwmout_period_us(pwmout_t* obj, int us)
mbed_official 354:e67efb2aab0e 161 {
mbed_official 354:e67efb2aab0e 162 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 354:e67efb2aab0e 163
mbed_official 76:aeb1df146756 164 float dc = pwmout_read(obj);
mbed_official 76:aeb1df146756 165
mbed_official 354:e67efb2aab0e 166 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 174:8bb9f3a33240 167
mbed_official 354:e67efb2aab0e 168 SystemCoreClockUpdate();
mbed_official 174:8bb9f3a33240 169
mbed_official 354:e67efb2aab0e 170 TimHandle.Init.Period = us - 1;
mbed_official 354:e67efb2aab0e 171 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 354:e67efb2aab0e 172 TimHandle.Init.ClockDivision = 0;
mbed_official 354:e67efb2aab0e 173 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 354:e67efb2aab0e 174 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 76:aeb1df146756 175
mbed_official 76:aeb1df146756 176 // Set duty cycle again
mbed_official 76:aeb1df146756 177 pwmout_write(obj, dc);
mbed_official 174:8bb9f3a33240 178
mbed_official 354:e67efb2aab0e 179 // Save for future use
mbed_official 354:e67efb2aab0e 180 obj->period = us;
mbed_official 354:e67efb2aab0e 181
mbed_official 354:e67efb2aab0e 182 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 76:aeb1df146756 183 }
mbed_official 76:aeb1df146756 184
mbed_official 354:e67efb2aab0e 185 void pwmout_pulsewidth(pwmout_t* obj, float seconds)
mbed_official 354:e67efb2aab0e 186 {
mbed_official 76:aeb1df146756 187 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 76:aeb1df146756 188 }
mbed_official 76:aeb1df146756 189
mbed_official 354:e67efb2aab0e 190 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms)
mbed_official 354:e67efb2aab0e 191 {
mbed_official 76:aeb1df146756 192 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 76:aeb1df146756 193 }
mbed_official 76:aeb1df146756 194
mbed_official 354:e67efb2aab0e 195 void pwmout_pulsewidth_us(pwmout_t* obj, int us)
mbed_official 354:e67efb2aab0e 196 {
mbed_official 76:aeb1df146756 197 float value = (float)us / (float)obj->period;
mbed_official 76:aeb1df146756 198 pwmout_write(obj, value);
mbed_official 76:aeb1df146756 199 }
mbed_official 174:8bb9f3a33240 200
mbed_official 174:8bb9f3a33240 201 #endif