diff options
Diffstat (limited to 'tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c')
| -rw-r--r-- | tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c new file mode 100644 index 0000000000..767ec1297c --- /dev/null +++ b/tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/pwmout_api.c @@ -0,0 +1,207 @@ +/* mbed Microcontroller Library + ******************************************************************************* + * Copyright (c) 2014, STMicroelectronics + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. Neither the name of STMicroelectronics nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR + * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER + * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + ******************************************************************************* + */ +#include "pwmout_api.h" + +#if DEVICE_PWMOUT + +#include "cmsis.h" +#include "pinmap.h" +#include "mbed_error.h" +#include "PeripheralPins.h" + +static TIM_HandleTypeDef TimHandle; + +void pwmout_init(pwmout_t* obj, PinName pin) +{ + // Get the peripheral name from the pin and assign it to the object + obj->pwm = (PWMName)pinmap_peripheral(pin, PinMap_PWM); + + // Get the functions (timer channel, (non)inverted) from the pin and assign it to the object + uint32_t function = pinmap_function(pin, PinMap_PWM); + MBED_ASSERT(function != (uint32_t)NC); + obj->channel = STM_PIN_CHANNEL(function); + obj->inverted = STM_PIN_INVERTED(function); + + if (obj->pwm == (PWMName)NC) { + error("PWM error: pinout mapping failed."); + } + + // Enable TIM clock + if (obj->pwm == PWM_1) __TIM1_CLK_ENABLE(); + if (obj->pwm == PWM_2) __TIM2_CLK_ENABLE(); + if (obj->pwm == PWM_3) __TIM3_CLK_ENABLE(); + if (obj->pwm == PWM_4) __TIM4_CLK_ENABLE(); +#if defined(TIM8_BASE) + if (obj->pwm == PWM_8) __TIM8_CLK_ENABLE(); +#endif + if (obj->pwm == PWM_9) __TIM9_CLK_ENABLE(); + if (obj->pwm == PWM_10) __TIM10_CLK_ENABLE(); + if (obj->pwm == PWM_11) __TIM11_CLK_ENABLE(); +#if defined(TIM13_BASE) + if (obj->pwm == PWM_13) __TIM13_CLK_ENABLE(); +#endif +#if defined(TIM14_BASE) + if (obj->pwm == PWM_14) __TIM14_CLK_ENABLE(); +#endif + + // Configure GPIO + pinmap_pinout(pin, PinMap_PWM); + + obj->pin = pin; + obj->period = 0; + obj->pulse = 0; + + pwmout_period_us(obj, 20000); // 20 ms per default +} + +void pwmout_free(pwmout_t* obj) +{ + // Configure GPIO + pin_function(obj->pin, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0)); +} + +void pwmout_write(pwmout_t* obj, float value) +{ + TIM_OC_InitTypeDef sConfig; + int channel = 0; + int complementary_channel = 0; + + TimHandle.Instance = (TIM_TypeDef *)(obj->pwm); + + if (value < (float)0.0) { + value = 0.0; + } else if (value > (float)1.0) { + value = 1.0; + } + + obj->pulse = (uint32_t)((float)obj->period * value); + + // Configure channels + sConfig.OCMode = TIM_OCMODE_PWM1; + sConfig.Pulse = obj->pulse; + sConfig.OCPolarity = TIM_OCPOLARITY_HIGH; + sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH; + sConfig.OCFastMode = TIM_OCFAST_DISABLE; + sConfig.OCIdleState = TIM_OCIDLESTATE_RESET; + sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET; + + complementary_channel = obj->inverted; + switch (obj->channel) { + + case 1: + channel = TIM_CHANNEL_1; + break; + + case 2: + channel = TIM_CHANNEL_2; + break; + + case 3: + channel = TIM_CHANNEL_3; + break; + + case 4: + channel = TIM_CHANNEL_4; + break; + + default: + return; + } + + HAL_TIM_PWM_ConfigChannel(&TimHandle, &sConfig, channel); + if (complementary_channel) { + HAL_TIMEx_PWMN_Start(&TimHandle, channel); + } else { + HAL_TIM_PWM_Start(&TimHandle, channel); + } +} + +float pwmout_read(pwmout_t* obj) +{ + float value = 0; + if (obj->period > 0) { + value = (float)(obj->pulse) / (float)(obj->period); + } + return ((value > (float)1.0) ? (float)(1.0) : (value)); +} + +void pwmout_period(pwmout_t* obj, float seconds) +{ + pwmout_period_us(obj, seconds * 1000000.0f); +} + +void pwmout_period_ms(pwmout_t* obj, int ms) +{ + pwmout_period_us(obj, ms * 1000); +} + +void pwmout_period_us(pwmout_t* obj, int us) +{ + TimHandle.Instance = (TIM_TypeDef *)(obj->pwm); + + float dc = pwmout_read(obj); + + __HAL_TIM_DISABLE(&TimHandle); + + // Update the SystemCoreClock variable + SystemCoreClockUpdate(); + + TimHandle.Init.Period = us - 1; + TimHandle.Init.Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick + TimHandle.Init.ClockDivision = 0; + TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP; + HAL_TIM_PWM_Init(&TimHandle); + + // Set duty cycle again + pwmout_write(obj, dc); + + // Save for future use + obj->period = us; + + __HAL_TIM_ENABLE(&TimHandle); +} + +void pwmout_pulsewidth(pwmout_t* obj, float seconds) +{ + pwmout_pulsewidth_us(obj, seconds * 1000000.0f); +} + +void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) +{ + pwmout_pulsewidth_us(obj, ms * 1000); +} + +void pwmout_pulsewidth_us(pwmout_t* obj, int us) +{ + float value = (float)us / (float)obj->period; + pwmout_write(obj, value); +} + +#endif |