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Diffstat (limited to 'simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c')
| -rw-r--r-- | simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c | 538 |
1 files changed, 538 insertions, 0 deletions
diff --git a/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c b/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c new file mode 100644 index 0000000..5bdb105 --- /dev/null +++ b/simonnnnn/Drivers/STM32L0xx_HAL_Driver/Src/stm32l0xx_hal_gpio.c @@ -0,0 +1,538 @@ +/**
+ ******************************************************************************
+ * @file stm32l0xx_hal_gpio.c
+ * @author MCD Application Team
+ * @brief GPIO HAL module driver.
+ * This file provides firmware functions to manage the following
+ * functionalities of the General Purpose Input/Output (GPIO) peripheral:
+ * + Initialization and de-initialization functions
+ * + IO operation functions
+ *
+ @verbatim
+ ==============================================================================
+ ##### GPIO Peripheral features #####
+ ==============================================================================
+ [..]
+ (+) Each port bit of the general-purpose I/O (GPIO) ports can be individually
+ configured by software in several modes:
+ (++) Input mode
+ (++) Analog mode
+ (++) Output mode
+ (++) Alternate function mode
+ (++) External interrupt/event lines
+
+ (+) During and just after reset, the alternate functions and external interrupt
+ lines are not active and the I/O ports are configured in input floating mode.
+
+ (+) All GPIO pins have weak internal pull-up and pull-down resistors, which can be
+ activated or not.
+
+ (+) In Output or Alternate mode, each IO can be configured on open-drain or push-pull
+ type and the IO speed can be selected depending on the VDD value.
+
+ (+) The microcontroller IO pins are connected to onboard peripherals/modules through a
+ multiplexer that allows only one peripheral alternate function (AF) connected
+ to an IO pin at a time. In this way, there can be no conflict between peripherals
+ sharing the same IO pin.
+
+ (+) All ports have external interrupt/event capability. To use external interrupt
+ lines, the port must be configured in input mode. All available GPIO pins are
+ connected to the 16 external interrupt/event lines from EXTI0 to EXTI15.
+
+ (+) The external interrupt/event controller consists of up to 28 edge detectors
+ (16 lines are connected to GPIO) for generating event/interrupt requests (each
+ input line can be independently configured to select the type (interrupt or event)
+ and the corresponding trigger event (rising or falling or both). Each line can
+ also be masked independently.
+
+ ##### How to use this driver #####
+ ==============================================================================
+ [..]
+ (#) Enable the GPIO IOPORT clock using the following function: __HAL_RCC_GPIOx_CLK_ENABLE().
+
+ (#) Configure the GPIO pin(s) using HAL_GPIO_Init().
+ (++) Configure the IO mode using "Mode" member from GPIO_InitTypeDef structure
+ (++) Activate Pull-up, Pull-down resistor using "Pull" member from GPIO_InitTypeDef
+ structure.
+ (++) In case of Output or alternate function mode selection: the speed is
+ configured through "Speed" member from GPIO_InitTypeDef structure.
+ (++) In alternate mode is selection, the alternate function connected to the IO
+ is configured through "Alternate" member from GPIO_InitTypeDef structure.
+ (++) Analog mode is required when a pin is to be used as ADC channel
+ or DAC output.
+ (++) In case of external interrupt/event selection the "Mode" member from
+ GPIO_InitTypeDef structure select the type (interrupt or event) and
+ the corresponding trigger event (rising or falling or both).
+
+ (#) In case of external interrupt/event mode selection, configure NVIC IRQ priority
+ mapped to the EXTI line using HAL_NVIC_SetPriority() and enable it using
+ HAL_NVIC_EnableIRQ().
+
+ (#) HAL_GPIO_DeInit allows to set register values to their reset value. This function
+ is also to be used when unconfiguring pin which was used as an external interrupt
+ or in event mode. That is the only way to reset the corresponding bit in
+ EXTI & SYSCFG registers.
+
+ (#) To get the level of a pin configured in input mode use HAL_GPIO_ReadPin().
+
+ (#) To set/reset the level of a pin configured in output mode use
+ HAL_GPIO_WritePin()/HAL_GPIO_TogglePin().
+
+ (#) To lock pin configuration until next reset use HAL_GPIO_LockPin().
+
+ (#) During and just after reset, the alternate functions are not
+ active and the GPIO pins are configured in input floating mode (except JTAG
+ pins).
+
+ (#) The LSE oscillator pins OSC32_IN and OSC32_OUT can be used as general purpose
+ (PC14 and PC15, respectively) when the LSE oscillator is off. The LSE has
+ priority over the GPIO function.
+
+ (#) The HSE oscillator pins OSC_IN/OSC_OUT can be used as
+ general purpose PH0 and PH1, respectively, when the HSE oscillator is off.
+ The HSE has priority over the GPIO function.
+
+ @endverbatim
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>© Copyright(c) 2016 STMicroelectronics.
+ * All rights reserved.</center></h2>
+ *
+ * This software component is licensed by ST under BSD 3-Clause license,
+ * the "License"; You may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at:
+ * opensource.org/licenses/BSD-3-Clause
+ *
+ ******************************************************************************
+ */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l0xx_hal.h"
+
+/** @addtogroup STM32L0xx_HAL_Driver
+ * @{
+ */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+
+/** @addtogroup GPIO
+ * @brief GPIO HAL module driver
+ * @{
+ */
+
+/** @addtogroup GPIO_Private
+ * @{
+ */
+/* Private define ------------------------------------------------------------*/
+
+
+#define GPIO_MODE (0x00000003U)
+#define EXTI_MODE (0x10000000U)
+#define GPIO_MODE_IT (0x00010000U)
+#define GPIO_MODE_EVT (0x00020000U)
+#define RISING_EDGE (0x00100000U)
+#define FALLING_EDGE (0x00200000U)
+#define GPIO_OUTPUT_TYPE (0x00000010U)
+
+#define GPIO_NUMBER (16U)
+
+/**
+ * @}
+ */
+/** @addtogroup GPIO_Exported_Functions
+ * @{
+ */
+
+/** @addtogroup GPIO_Exported_Functions_Group1
+ * @brief Initialization and de-initialization functions
+ *
+@verbatim
+ ===============================================================================
+ ##### Initialization and de-initialization functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Initializes the GPIOx peripheral according to the specified parameters in the GPIO_Init.
+ * @param GPIOx where x can be (A..E and H) to select the GPIO peripheral for STM32L0XX family devices.
+ * Note that GPIOE is not available on all devices.
+ * @param GPIO_Init pointer to a GPIO_InitTypeDef structure that contains
+ * the configuration information for the specified GPIO peripheral.
+ * @retval None
+ */
+void HAL_GPIO_Init(GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_Init)
+{
+ uint32_t position = 0x00U;
+ uint32_t iocurrent = 0x00U;
+ uint32_t temp = 0x00U;
+
+ /* Check the parameters */
+ assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
+ assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, (GPIO_Init->Pin)));
+
+ /* Configure the port pins */
+ while (((GPIO_Init->Pin) >> position) != 0)
+ {
+ /* Get the IO position */
+ iocurrent = (GPIO_Init->Pin) & (1U << position);
+
+ if (iocurrent)
+ {
+ /*--------------------- GPIO Mode Configuration ------------------------*/
+ /* In case of Output or Alternate function mode selection */
+ if ((GPIO_Init->Mode == GPIO_MODE_OUTPUT_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_PP) ||
+ (GPIO_Init->Mode == GPIO_MODE_OUTPUT_OD) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
+ {
+ /* Check the Speed parameter */
+ assert_param(IS_GPIO_SPEED(GPIO_Init->Speed));
+ /* Configure the IO Speed */
+ temp = GPIOx->OSPEEDR;
+ temp &= ~(GPIO_OSPEEDER_OSPEED0 << (position * 2U));
+ temp |= (GPIO_Init->Speed << (position * 2U));
+ GPIOx->OSPEEDR = temp;
+
+ /* Configure the IO Output Type */
+ temp = GPIOx->OTYPER;
+ temp &= ~(GPIO_OTYPER_OT_0 << position) ;
+ temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4U) << position);
+ GPIOx->OTYPER = temp;
+ }
+
+ /* Activate the Pull-up or Pull down resistor for the current IO */
+ temp = GPIOx->PUPDR;
+ temp &= ~(GPIO_PUPDR_PUPD0 << (position * 2U));
+ temp |= ((GPIO_Init->Pull) << (position * 2U));
+ GPIOx->PUPDR = temp;
+
+ /* In case of Alternate function mode selection */
+ if ((GPIO_Init->Mode == GPIO_MODE_AF_PP) || (GPIO_Init->Mode == GPIO_MODE_AF_OD))
+ {
+ /* Check the Alternate function parameters */
+ assert_param(IS_GPIO_AF_INSTANCE(GPIOx));
+ assert_param(IS_GPIO_AF(GPIO_Init->Alternate));
+
+ /* Configure Alternate function mapped with the current IO */
+ temp = GPIOx->AFR[position >> 3U];
+ temp &= ~(0xFUL << ((uint32_t)(position & 0x07UL) * 4U));
+ temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & (uint32_t)0x07U) * 4U));
+ GPIOx->AFR[position >> 3U] = temp;
+ }
+
+ /* Configure IO Direction mode (Input, Output, Alternate or Analog) */
+ temp = GPIOx->MODER;
+ temp &= ~(GPIO_MODER_MODE0 << (position * 2U));
+ temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2U));
+ GPIOx->MODER = temp;
+
+ /*--------------------- EXTI Mode Configuration ------------------------*/
+ /* Configure the External Interrupt or event for the current IO */
+ if ((GPIO_Init->Mode & EXTI_MODE) == EXTI_MODE)
+ {
+ /* Enable SYSCFG Clock */
+ __HAL_RCC_SYSCFG_CLK_ENABLE();
+
+ temp = SYSCFG->EXTICR[position >> 2U];
+ CLEAR_BIT(temp, (0x0FUL) << (4U * (position & 0x03U)));
+ SET_BIT(temp, (GPIO_GET_INDEX(GPIOx)) << (4 * (position & 0x03U)));
+ SYSCFG->EXTICR[position >> 2U] = temp;
+
+ /* Clear EXTI line configuration */
+ temp = EXTI->IMR;
+ temp &= ~((uint32_t)iocurrent);
+ if ((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
+ {
+ temp |= iocurrent;
+ }
+ EXTI->IMR = temp;
+
+ temp = EXTI->EMR;
+ temp &= ~((uint32_t)iocurrent);
+ if ((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
+ {
+ temp |= iocurrent;
+ }
+ EXTI->EMR = temp;
+
+ /* Clear Rising Falling edge configuration */
+ temp = EXTI->RTSR;
+ temp &= ~((uint32_t)iocurrent);
+ if ((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
+ {
+ temp |= iocurrent;
+ }
+ EXTI->RTSR = temp;
+
+ temp = EXTI->FTSR;
+ temp &= ~((uint32_t)iocurrent);
+ if ((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
+ {
+ temp |= iocurrent;
+ }
+ EXTI->FTSR = temp;
+ }
+ }
+ position++;
+ }
+}
+
+/**
+ * @brief De-initializes the GPIOx peripheral registers to their default reset values.
+ * @param GPIOx where x can be (A..E and H) to select the GPIO peripheral for STM32L0XX family devices.
+ * Note that GPIOE is not available on all devices.
+ * @param GPIO_Pin specifies the port bit to be written.
+ * This parameter can be one of GPIO_PIN_x where x can be (0..15).
+ * All port bits are not necessarily available on all GPIOs.
+ * @retval None
+ */
+void HAL_GPIO_DeInit(GPIO_TypeDef *GPIOx, uint32_t GPIO_Pin)
+{
+ uint32_t position = 0x00U;
+ uint32_t iocurrent = 0x00U;
+ uint32_t tmp = 0x00U;
+
+ /* Check the parameters */
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_Pin));
+
+ /* Configure the port pins */
+ while ((GPIO_Pin >> position) != 0)
+ {
+ /* Get the IO position */
+ iocurrent = (GPIO_Pin) & (1U << position);
+
+ if (iocurrent)
+ {
+ /*------------------------- EXTI Mode Configuration --------------------*/
+ /* Clear the External Interrupt or Event for the current IO */
+
+ tmp = SYSCFG->EXTICR[position >> 2U];
+ tmp &= ((0x0FUL) << (4U * (position & 0x03U)));
+ if (tmp == (GPIO_GET_INDEX(GPIOx) << (4U * (position & 0x03U))))
+ {
+ /* Clear EXTI line configuration */
+ EXTI->IMR &= ~((uint32_t)iocurrent);
+ EXTI->EMR &= ~((uint32_t)iocurrent);
+
+ /* Clear Rising Falling edge configuration */
+ EXTI->RTSR &= ~((uint32_t)iocurrent);
+ EXTI->FTSR &= ~((uint32_t)iocurrent);
+
+ tmp = (0x0FUL) << (4U * (position & 0x03U));
+ SYSCFG->EXTICR[position >> 2U] &= ~tmp;
+ }
+
+ /*------------------------- GPIO Mode Configuration --------------------*/
+ /* Configure IO Direction in Input Floting Mode */
+ GPIOx->MODER |= (GPIO_MODER_MODE0 << (position * 2U));
+
+ /* Configure the default Alternate Function in current IO */
+ GPIOx->AFR[position >> 3U] &= ~(0xFUL << ((uint32_t)(position & 0x07UL) * 4U));
+
+ /* Deactivate the Pull-up oand Pull-down resistor for the current IO */
+ GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPD0 << (position * 2U));
+
+ /* Configure the default value IO Output Type */
+ GPIOx->OTYPER &= ~(GPIO_OTYPER_OT_0 << position);
+
+ /* Configure the default value for IO Speed */
+ GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEED0 << (position * 2U));
+ }
+ position++;
+ }
+}
+
+/**
+ * @}
+ */
+
+/** @addtogroup GPIO_Exported_Functions_Group2
+ * @brief GPIO Read and Write
+ *
+@verbatim
+ ===============================================================================
+ ##### IO operation functions #####
+ ===============================================================================
+
+@endverbatim
+ * @{
+ */
+
+/**
+ * @brief Reads the specified input port pin.
+ * @param GPIOx where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
+ * Note that GPIOE is not available on all devices.
+ * @param GPIO_Pin specifies the port bit to read.
+ * This parameter can be GPIO_PIN_x where x can be (0..15).
+ * All port bits are not necessarily available on all GPIOs.
+ * @retval The input port pin value.
+ */
+GPIO_PinState HAL_GPIO_ReadPin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
+{
+ GPIO_PinState bitstatus;
+
+ /* Check the parameters */
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_Pin));
+
+ if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
+ {
+ bitstatus = GPIO_PIN_SET;
+ }
+ else
+ {
+ bitstatus = GPIO_PIN_RESET;
+ }
+ return bitstatus;
+}
+
+/**
+ * @brief Sets or clears the selected data port bit.
+ *
+ * @note This function uses GPIOx_BSRR register to allow atomic read/modify
+ * accesses. In this way, there is no risk of an IRQ occurring between
+ * the read and the modify access.
+ *
+ * @param GPIOx where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
+ * Note that GPIOE is not available on all devices.
+ * @param GPIO_Pin specifies the port bit to be written.
+ * This parameter can be one of GPIO_PIN_x where x can be (0..15).
+ * All port bits are not necessarily available on all GPIOs.
+ * @param PinState specifies the value to be written to the selected bit.
+ * This parameter can be one of the GPIO_PinState enum values:
+ * GPIO_PIN_RESET: to clear the port pin
+ * GPIO_PIN_SET: to set the port pin
+ * @retval None
+ */
+void HAL_GPIO_WritePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, GPIO_PinState PinState)
+{
+ /* Check the parameters */
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_Pin));
+ assert_param(IS_GPIO_PIN_ACTION(PinState));
+
+ if (PinState != GPIO_PIN_RESET)
+ {
+ GPIOx->BSRR = GPIO_Pin;
+ }
+ else
+ {
+ GPIOx->BRR = GPIO_Pin ;
+ }
+}
+
+/**
+ * @brief Toggles the specified GPIO pins.
+ * @param GPIOx Where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family devices.
+ * Note that GPIOE is not available on all devices.
+ * All port bits are not necessarily available on all GPIOs.
+ * @param GPIO_Pin Specifies the pins to be toggled.
+ * @retval None
+ */
+void HAL_GPIO_TogglePin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
+{
+ uint32_t odr;
+
+ /* Check the parameters */
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_Pin));
+
+ /* get current Ouput Data Register value */
+ odr = GPIOx->ODR;
+
+ /* Set selected pins that were at low level, and reset ones that were high */
+ GPIOx->BSRR = ((odr & GPIO_Pin) << GPIO_NUMBER) | (~odr & GPIO_Pin);
+}
+
+/**
+* @brief Locks GPIO Pins configuration registers.
+* @note The locked registers are GPIOx_MODER, GPIOx_OTYPER, GPIOx_OSPEEDR,
+* GPIOx_PUPDR, GPIOx_AFRL and GPIOx_AFRH.
+* @note The configuration of the locked GPIO pins can no longer be modified
+* until the next reset.
+* @param GPIOx where x can be (A..E and H) to select the GPIO peripheral for STM32L0xx family.
+* Note that GPIOE is not available on all devices.
+* @param GPIO_Pin specifies the port bit to be locked.
+* This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
+* All port bits are not necessarily available on all GPIOs.
+* @retval None
+*/
+HAL_StatusTypeDef HAL_GPIO_LockPin(GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin)
+{
+ __IO uint32_t tmp = GPIO_LCKR_LCKK;
+
+ /* Check the parameters */
+ assert_param(IS_GPIO_PIN_AVAILABLE(GPIOx, GPIO_Pin));
+
+ /* Apply lock key write sequence */
+ tmp |= GPIO_Pin;
+ /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
+ GPIOx->LCKR = tmp;
+ /* Reset LCKx bit(s): LCKK='0' + LCK[15-0] */
+ GPIOx->LCKR = GPIO_Pin;
+ /* Set LCKx bit(s): LCKK='1' + LCK[15-0] */
+ GPIOx->LCKR = tmp;
+ /* Read LCKK register. This read is mandatory to complete key lock sequence */
+ tmp = GPIOx->LCKR;
+
+ /* read again in order to confirm lock is active */
+ if ((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
+ {
+ return HAL_OK;
+ }
+ else
+ {
+ return HAL_ERROR;
+ }
+}
+/**
+ * @brief This function handles EXTI interrupt request.
+ * @param GPIO_Pin Specifies the pins connected to the EXTI line.
+ * @retval None
+ */
+void HAL_GPIO_EXTI_IRQHandler(uint16_t GPIO_Pin)
+{
+ /* EXTI line interrupt detected */
+ if (__HAL_GPIO_EXTI_GET_IT(GPIO_Pin) != RESET)
+ {
+ __HAL_GPIO_EXTI_CLEAR_IT(GPIO_Pin);
+ HAL_GPIO_EXTI_Callback(GPIO_Pin);
+ }
+}
+
+/**
+ * @brief EXTI line detection callbacks.
+ * @param GPIO_Pin Specifies the pins connected to the EXTI line.
+ * @retval None
+ */
+__weak void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)
+{
+ /* Prevent unused argument(s) compilation warning */
+ UNUSED(GPIO_Pin);
+
+ /* NOTE: This function Should not be modified, when the callback is needed,
+ the HAL_GPIO_EXTI_Callback could be implemented in the user file
+ */
+}
+
+/**
+ * @}
+ */
+
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#endif /* HAL_GPIO_MODULE_ENABLED */
+
+/**
+ * @}
+ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+
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