shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L053R8/pwmout_api.c@181:a4cbdfbbd2f4, 2014-05-07 (annotated)

Committer:
mbed_official
Date:
Wed May 07 13:15:08 2014 +0100
Revision:
181:a4cbdfbbd2f4
Child:
250:a49055e7a707
Synchronized with git revision 7751e759576c6fd68deccb81ea82bac19ed41745



Full URL: https://github.com/mbedmicro/mbed/commit/7751e759576c6fd68deccb81ea82bac19ed41745/

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 181:a4cbdfbbd2f4 3 * Copyright (c) 2014, 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 181:a4cbdfbbd2f4 36 #include "error.h"
mbed_official 181:a4cbdfbbd2f4 37
mbed_official 181:a4cbdfbbd2f4 38 // TIM21 cannot be used because already used by the us_ticker
mbed_official 181:a4cbdfbbd2f4 39 static const PinMap PinMap_PWM[] = {
mbed_official 181:a4cbdfbbd2f4 40 {PA_0, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH1
mbed_official 181:a4cbdfbbd2f4 41 {PA_1, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2
mbed_official 181:a4cbdfbbd2f4 42 // {PA_2, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21)}, // TIM21_CH1
mbed_official 181:a4cbdfbbd2f4 43 // {PA_2, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3 - used by STDIO TX
mbed_official 181:a4cbdfbbd2f4 44 // {PA_3, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM21)}, // TIM21_CH2
mbed_official 181:a4cbdfbbd2f4 45 // {PA_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4 - used by STDIO RX
mbed_official 181:a4cbdfbbd2f4 46 {PA_5, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2)}, // TIM2_CH1 - used also to drive the LED
mbed_official 181:a4cbdfbbd2f4 47 {PA_6, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM22)}, // TIM22_CH1
mbed_official 181:a4cbdfbbd2f4 48 {PA_7, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM22)}, // TIM22_CH2
mbed_official 181:a4cbdfbbd2f4 49 {PA_15, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF5_TIM2)}, // TIM2_CH1
mbed_official 181:a4cbdfbbd2f4 50 {PB_3, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH2
mbed_official 181:a4cbdfbbd2f4 51 {PB_4, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM22)}, // TIM22_CH1
mbed_official 181:a4cbdfbbd2f4 52 {PB_5, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF4_TIM22)}, // TIM22_CH2
mbed_official 181:a4cbdfbbd2f4 53 {PB_10, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH3
mbed_official 181:a4cbdfbbd2f4 54 {PB_11, PWM_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF2_TIM2)}, // TIM2_CH4
mbed_official 181:a4cbdfbbd2f4 55 // {PB_13, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM21)}, // TIM21_CH1
mbed_official 181:a4cbdfbbd2f4 56 // {PB_14, PWM_21, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF6_TIM21)}, // TIM21_CH2
mbed_official 181:a4cbdfbbd2f4 57 {PC_6, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM22)}, // TIM22_CH1
mbed_official 181:a4cbdfbbd2f4 58 {PC_7, PWM_22, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF0_TIM22)}, // TIM22_CH2
mbed_official 181:a4cbdfbbd2f4 59 {NC, NC, 0}
mbed_official 181:a4cbdfbbd2f4 60 };
mbed_official 181:a4cbdfbbd2f4 61
mbed_official 181:a4cbdfbbd2f4 62 static TIM_HandleTypeDef TimHandle;
mbed_official 181:a4cbdfbbd2f4 63
mbed_official 181:a4cbdfbbd2f4 64 void pwmout_init(pwmout_t* obj, PinName pin) {
mbed_official 181:a4cbdfbbd2f4 65 // Get the peripheral name from the pin and assign it to the object
mbed_official 181:a4cbdfbbd2f4 66 obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM);
mbed_official 181:a4cbdfbbd2f4 67
mbed_official 181:a4cbdfbbd2f4 68 if (obj->pwm == (PWMName)NC) {
mbed_official 181:a4cbdfbbd2f4 69 error("PWM error: pinout mapping failed.");
mbed_official 181:a4cbdfbbd2f4 70 }
mbed_official 181:a4cbdfbbd2f4 71
mbed_official 181:a4cbdfbbd2f4 72 // Enable TIM clock
mbed_official 181:a4cbdfbbd2f4 73 if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 74 if (obj->pwm == PWM_21) __TIM21_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 75 if (obj->pwm == PWM_22) __TIM22_CLK_ENABLE();
mbed_official 181:a4cbdfbbd2f4 76
mbed_official 181:a4cbdfbbd2f4 77 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 78 pinmap_pinout(pin, PinMap_PWM);
mbed_official 181:a4cbdfbbd2f4 79
mbed_official 181:a4cbdfbbd2f4 80 obj->pin = pin;
mbed_official 181:a4cbdfbbd2f4 81 obj->period = 0;
mbed_official 181:a4cbdfbbd2f4 82 obj->pulse = 0;
mbed_official 181:a4cbdfbbd2f4 83
mbed_official 181:a4cbdfbbd2f4 84 pwmout_period_us(obj, 20000); // 20 ms per default
mbed_official 181:a4cbdfbbd2f4 85 }
mbed_official 181:a4cbdfbbd2f4 86
mbed_official 181:a4cbdfbbd2f4 87 void pwmout_free(pwmout_t* obj) {
mbed_official 181:a4cbdfbbd2f4 88 // Configure GPIO
mbed_official 181:a4cbdfbbd2f4 89 pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
mbed_official 181:a4cbdfbbd2f4 90 }
mbed_official 181:a4cbdfbbd2f4 91
mbed_official 181:a4cbdfbbd2f4 92 void pwmout_write(pwmout_t* obj, float value) {
mbed_official 181:a4cbdfbbd2f4 93 TIM_OC_InitTypeDef sConfig;
mbed_official 181:a4cbdfbbd2f4 94 int channel = 0;
mbed_official 181:a4cbdfbbd2f4 95
mbed_official 181:a4cbdfbbd2f4 96 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 181:a4cbdfbbd2f4 97
mbed_official 181:a4cbdfbbd2f4 98 if (value < (float)0.0) {
mbed_official 181:a4cbdfbbd2f4 99 value = 0.0;
mbed_official 181:a4cbdfbbd2f4 100 } else if (value > (float)1.0) {
mbed_official 181:a4cbdfbbd2f4 101 value = 1.0;
mbed_official 181:a4cbdfbbd2f4 102 }
mbed_official 181:a4cbdfbbd2f4 103
mbed_official 181:a4cbdfbbd2f4 104 obj->pulse = (uint32_t)((float)obj->period * value);
mbed_official 181:a4cbdfbbd2f4 105
mbed_official 181:a4cbdfbbd2f4 106 // Configure channels
mbed_official 181:a4cbdfbbd2f4 107 sConfig.OCMode = TIM_OCMODE_PWM1;
mbed_official 181:a4cbdfbbd2f4 108 sConfig.Pulse = obj->pulse;
mbed_official 181:a4cbdfbbd2f4 109 sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
mbed_official 181:a4cbdfbbd2f4 110 sConfig.OCFastMode = TIM_OCFAST_ENABLE;
mbed_official 181:a4cbdfbbd2f4 111
mbed_official 181:a4cbdfbbd2f4 112 switch (obj->pin) {
mbed_official 181:a4cbdfbbd2f4 113 // Channels 1
mbed_official 181:a4cbdfbbd2f4 114 case PA_0:
mbed_official 181:a4cbdfbbd2f4 115 // case PA_2:
mbed_official 181:a4cbdfbbd2f4 116 case PA_5:
mbed_official 181:a4cbdfbbd2f4 117 case PA_6:
mbed_official 181:a4cbdfbbd2f4 118 case PA_15:
mbed_official 181:a4cbdfbbd2f4 119 case PB_4:
mbed_official 181:a4cbdfbbd2f4 120 // case PB_13:
mbed_official 181:a4cbdfbbd2f4 121 case PC_6:
mbed_official 181:a4cbdfbbd2f4 122 channel = TIM_CHANNEL_1;
mbed_official 181:a4cbdfbbd2f4 123 break;
mbed_official 181:a4cbdfbbd2f4 124 // Channels 2
mbed_official 181:a4cbdfbbd2f4 125 case PA_1:
mbed_official 181:a4cbdfbbd2f4 126 // case PA_3:
mbed_official 181:a4cbdfbbd2f4 127 case PA_7:
mbed_official 181:a4cbdfbbd2f4 128 case PB_3:
mbed_official 181:a4cbdfbbd2f4 129 case PB_5:
mbed_official 181:a4cbdfbbd2f4 130 // case PB_14:
mbed_official 181:a4cbdfbbd2f4 131 case PC_7:
mbed_official 181:a4cbdfbbd2f4 132 channel = TIM_CHANNEL_2;
mbed_official 181:a4cbdfbbd2f4 133 break;
mbed_official 181:a4cbdfbbd2f4 134 // Channels 3
mbed_official 181:a4cbdfbbd2f4 135 case PA_2:
mbed_official 181:a4cbdfbbd2f4 136 case PB_10:
mbed_official 181:a4cbdfbbd2f4 137 channel = TIM_CHANNEL_3;
mbed_official 181:a4cbdfbbd2f4 138 break;
mbed_official 181:a4cbdfbbd2f4 139 // Channels 4
mbed_official 181:a4cbdfbbd2f4 140 case PA_3:
mbed_official 181:a4cbdfbbd2f4 141 case PB_11:
mbed_official 181:a4cbdfbbd2f4 142 channel = TIM_CHANNEL_4;
mbed_official 181:a4cbdfbbd2f4 143 break;
mbed_official 181:a4cbdfbbd2f4 144 default:
mbed_official 181:a4cbdfbbd2f4 145 return;
mbed_official 181:a4cbdfbbd2f4 146 }
mbed_official 181:a4cbdfbbd2f4 147
mbed_official 181:a4cbdfbbd2f4 148 HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel);
mbed_official 181:a4cbdfbbd2f4 149 HAL_TIM_PWM_Start(&TimHandle, channel);
mbed_official 181:a4cbdfbbd2f4 150 }
mbed_official 181:a4cbdfbbd2f4 151
mbed_official 181:a4cbdfbbd2f4 152 float pwmout_read(pwmout_t* obj) {
mbed_official 181:a4cbdfbbd2f4 153 float value = 0;
mbed_official 181:a4cbdfbbd2f4 154 if (obj->period > 0) {
mbed_official 181:a4cbdfbbd2f4 155 value = (float)(obj->pulse) / (float)(obj->period);
mbed_official 181:a4cbdfbbd2f4 156 }
mbed_official 181:a4cbdfbbd2f4 157 return ((value > (float)1.0) ? (float)(1.0) : (value));
mbed_official 181:a4cbdfbbd2f4 158 }
mbed_official 181:a4cbdfbbd2f4 159
mbed_official 181:a4cbdfbbd2f4 160 void pwmout_period(pwmout_t* obj, float seconds) {
mbed_official 181:a4cbdfbbd2f4 161 pwmout_period_us(obj, seconds * 1000000.0f);
mbed_official 181:a4cbdfbbd2f4 162 }
mbed_official 181:a4cbdfbbd2f4 163
mbed_official 181:a4cbdfbbd2f4 164 void pwmout_period_ms(pwmout_t* obj, int ms) {
mbed_official 181:a4cbdfbbd2f4 165 pwmout_period_us(obj, ms * 1000);
mbed_official 181:a4cbdfbbd2f4 166 }
mbed_official 181:a4cbdfbbd2f4 167
mbed_official 181:a4cbdfbbd2f4 168 void pwmout_period_us(pwmout_t* obj, int us) {
mbed_official 181:a4cbdfbbd2f4 169 TimHandle.Instance = (TIM_TypeDef *)(obj->pwm);
mbed_official 181:a4cbdfbbd2f4 170
mbed_official 181:a4cbdfbbd2f4 171 float dc = pwmout_read(obj);
mbed_official 181:a4cbdfbbd2f4 172
mbed_official 181:a4cbdfbbd2f4 173 __HAL_TIM_DISABLE(&TimHandle);
mbed_official 181:a4cbdfbbd2f4 174
mbed_official 181:a4cbdfbbd2f4 175 TimHandle.Init.Period = us - 1;
mbed_official 181:a4cbdfbbd2f4 176 TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 181:a4cbdfbbd2f4 177 TimHandle.Init.ClockDivision = 0;
mbed_official 181:a4cbdfbbd2f4 178 TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 181:a4cbdfbbd2f4 179 HAL_TIM_PWM_Init(&TimHandle);
mbed_official 181:a4cbdfbbd2f4 180
mbed_official 181:a4cbdfbbd2f4 181 // Set duty cycle again
mbed_official 181:a4cbdfbbd2f4 182 pwmout_write(obj, dc);
mbed_official 181:a4cbdfbbd2f4 183
mbed_official 181:a4cbdfbbd2f4 184 // Save for future use
mbed_official 181:a4cbdfbbd2f4 185 obj->period = us;
mbed_official 181:a4cbdfbbd2f4 186
mbed_official 181:a4cbdfbbd2f4 187 __HAL_TIM_ENABLE(&TimHandle);
mbed_official 181:a4cbdfbbd2f4 188 }
mbed_official 181:a4cbdfbbd2f4 189
mbed_official 181:a4cbdfbbd2f4 190 void pwmout_pulsewidth(pwmout_t* obj, float seconds) {
mbed_official 181:a4cbdfbbd2f4 191 pwmout_pulsewidth_us(obj, seconds * 1000000.0f);
mbed_official 181:a4cbdfbbd2f4 192 }
mbed_official 181:a4cbdfbbd2f4 193
mbed_official 181:a4cbdfbbd2f4 194 void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) {
mbed_official 181:a4cbdfbbd2f4 195 pwmout_pulsewidth_us(obj, ms * 1000);
mbed_official 181:a4cbdfbbd2f4 196 }
mbed_official 181:a4cbdfbbd2f4 197
mbed_official 181:a4cbdfbbd2f4 198 void pwmout_pulsewidth_us(pwmout_t* obj, int us) {
mbed_official 181:a4cbdfbbd2f4 199 float value = (float)us / (float)obj->period;
mbed_official 181:a4cbdfbbd2f4 200 pwmout_write(obj, value);
mbed_official 181:a4cbdfbbd2f4 201 }
mbed_official 181:a4cbdfbbd2f4 202
mbed_official 181:a4cbdfbbd2f4 203 #endif