Diff: targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_gpio.c

Revision:

610:813dcc80987e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/cmsis/TARGET_STM/TARGET_STM32L4/stm32l4xx_hal_gpio.c	Fri Aug 14 13:15:17 2015 +0100
@@ -0,0 +1,559 @@
+/**
+  ******************************************************************************
+  * @file    stm32l4xx_hal_gpio.c
+  * @author  MCD Application Team
+  * @version V1.0.0
+  * @date    26-June-2015
+  * @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 39 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 AHB 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().
+
+    (#) 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>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+  *
+  * 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.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32l4xx_hal.h"
+
+/** @addtogroup STM32L4xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup GPIO GPIO
+  * @brief GPIO HAL module driver
+  * @{
+  */
+
+#ifdef HAL_GPIO_MODULE_ENABLED
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private defines -----------------------------------------------------------*/
+/** @defgroup GPIO_Private_Defines GPIO Private Defines
+  * @{
+  */
+#define GPIO_MODE             ((uint32_t)0x00000003)
+#define ANALOG_MODE           ((uint32_t)0x00000008)
+#define EXTI_MODE             ((uint32_t)0x10000000)
+#define GPIO_MODE_IT          ((uint32_t)0x00010000)
+#define GPIO_MODE_EVT         ((uint32_t)0x00020000)
+#define RISING_EDGE           ((uint32_t)0x00100000)
+#define FALLING_EDGE          ((uint32_t)0x00200000)
+#define GPIO_OUTPUT_TYPE      ((uint32_t)0x00000010)
+
+#define GPIO_NUMBER           ((uint32_t)16)
+/**
+  * @}
+  */
+  
+/* Private macros ------------------------------------------------------------*/
+/* Private macros ------------------------------------------------------------*/
+/** @defgroup GPIO_Private_Macros GPIO Private Macros
+  * @{
+  */
+/**
+  * @}
+  */
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @defgroup GPIO_Exported_Functions GPIO Exported Functions
+  * @{
+  */
+
+/** @defgroup GPIO_Exported_Functions_Group1 Initialization/de-initialization functions 
+ *  @brief    Initialization and Configuration functions
+ *
+@verbatim
+ ===============================================================================
+              ##### Initialization and de-initialization functions #####
+ ===============================================================================
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Initialize the GPIOx peripheral according to the specified parameters in the GPIO_Init.
+  * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
+  * @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 = 0x00;
+  uint32_t iocurrent = 0x00;
+  uint32_t temp = 0x00;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
+  assert_param(IS_GPIO_PIN(GPIO_Init->Pin));
+  assert_param(IS_GPIO_MODE(GPIO_Init->Mode));
+  assert_param(IS_GPIO_PULL(GPIO_Init->Pull));
+
+  /* Configure the port pins */
+  while (((GPIO_Init->Pin) >> position) != RESET)
+  {
+    /* Get current io position */
+    iocurrent = (GPIO_Init->Pin) & (1U << position);
+
+    if(iocurrent)
+    {
+      /*--------------------- GPIO Mode Configuration ------------------------*/
+      /* 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 >> 3];
+        temp &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
+        temp |= ((uint32_t)(GPIO_Init->Alternate) << (((uint32_t)position & (uint32_t)0x07) * 4));
+        GPIOx->AFR[position >> 3] = temp;
+      }
+
+      /* Configure IO Direction mode (Input, Output, Alternate or Analog) */
+      temp = GPIOx->MODER;
+      temp &= ~(GPIO_MODER_MODER0 << (position * 2));
+      temp |= ((GPIO_Init->Mode & GPIO_MODE) << (position * 2));
+      GPIOx->MODER = temp;
+
+      /* 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_OSPEEDR0 << (position * 2));
+        temp |= (GPIO_Init->Speed << (position * 2));
+        GPIOx->OSPEEDR = temp;
+
+        /* Configure the IO Output Type */
+        temp = GPIOx->OTYPER;
+        temp &= ~(GPIO_OTYPER_OT_0 << position) ;
+        temp |= (((GPIO_Init->Mode & GPIO_OUTPUT_TYPE) >> 4) << position);
+        GPIOx->OTYPER = temp;
+      }
+
+      /* In case of Analog mode, check if ADC control mode is selected */
+      if((GPIO_Init->Mode & GPIO_MODE_ANALOG) == GPIO_MODE_ANALOG)
+      {
+        /* Configure the IO Output Type */
+        temp = GPIOx->ASCR;
+        temp &= ~(GPIO_ASCR_EN_0 << position) ;
+        temp |= (((GPIO_Init->Mode & ANALOG_MODE) >> 3) << position);
+        GPIOx->ASCR = temp;
+      }
+
+      /* Activate the Pull-up or Pull down resistor for the current IO */
+      temp = GPIOx->PUPDR;
+      temp &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
+      temp |= ((GPIO_Init->Pull) << (position * 2));
+      GPIOx->PUPDR = 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 >> 2];
+        temp &= ~(((uint32_t)0x0F) << (4 * (position & 0x03)));
+        temp |= (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03)));
+        SYSCFG->EXTICR[position >> 2] = temp;
+
+        /* Clear EXTI line configuration */
+        temp = EXTI->IMR1;
+        temp &= ~((uint32_t)iocurrent);
+        if((GPIO_Init->Mode & GPIO_MODE_IT) == GPIO_MODE_IT)
+        {
+          temp |= iocurrent;
+        }
+        EXTI->IMR1 = temp;
+
+        temp = EXTI->EMR1;
+        temp &= ~((uint32_t)iocurrent);
+        if((GPIO_Init->Mode & GPIO_MODE_EVT) == GPIO_MODE_EVT)
+        {
+          temp |= iocurrent;
+        }
+        EXTI->EMR1 = temp;
+
+        /* Clear Rising Falling edge configuration */
+        temp = EXTI->RTSR1;
+        temp &= ~((uint32_t)iocurrent);
+        if((GPIO_Init->Mode & RISING_EDGE) == RISING_EDGE)
+        {
+          temp |= iocurrent;
+        }
+        EXTI->RTSR1 = temp;
+
+        temp = EXTI->FTSR1;
+        temp &= ~((uint32_t)iocurrent);
+        if((GPIO_Init->Mode & FALLING_EDGE) == FALLING_EDGE)
+        {
+          temp |= iocurrent;
+        }
+        EXTI->FTSR1 = temp;
+      }
+    }
+    
+    position++;
+  }
+}
+
+/**
+  * @brief  De-initialize the GPIOx peripheral registers to their default reset values.
+  * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
+  * @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).
+  * @retval None
+  */
+void HAL_GPIO_DeInit(GPIO_TypeDef  *GPIOx, uint32_t GPIO_Pin)
+{
+  uint32_t position = 0x00;
+  uint32_t iocurrent = 0x00;
+  uint32_t tmp = 0x00;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_INSTANCE(GPIOx));
+  assert_param(IS_GPIO_PIN(GPIO_Pin));
+
+  /* Configure the port pins */
+  while ((GPIO_Pin >> position) != RESET)
+  {
+    /* Get current io position */
+    iocurrent = (GPIO_Pin) & (1U << position);
+
+    if (iocurrent)
+    {
+      /*------------------------- GPIO Mode Configuration --------------------*/
+      /* Configure IO in Analog Mode */
+      GPIOx->MODER |= (GPIO_MODER_MODER0 << (position * 2));
+
+      /* Configure the default Alternate Function in current IO */
+      GPIOx->AFR[position >> 3] &= ~((uint32_t)0xF << ((uint32_t)(position & (uint32_t)0x07) * 4)) ;
+
+      /* Configure the default value for IO Speed */
+      GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 << (position * 2));
+
+      /* Configure the default value IO Output Type */
+      GPIOx->OTYPER  &= ~(GPIO_OTYPER_OT_0 << position) ;
+
+      /* Deactivate the Pull-up and Pull-down resistor for the current IO */
+      GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0 << (position * 2));
+
+      /* Deactivate the Control bit of Analog mode for the current IO */
+      GPIOx->ASCR &= ~(GPIO_ASCR_EN_0<< position);
+
+      /*------------------------- EXTI Mode Configuration --------------------*/
+      /* Clear the External Interrupt or Event for the current IO */
+      
+      tmp = SYSCFG->EXTICR[position >> 2];
+      tmp &= (((uint32_t)0x0F) << (4 * (position & 0x03)));
+      if(tmp == (GPIO_GET_INDEX(GPIOx) << (4 * (position & 0x03))))
+      {
+        tmp = ((uint32_t)0x0F) << (4 * (position & 0x03));
+        SYSCFG->EXTICR[position >> 2] &= ~tmp;
+
+        /* Clear EXTI line configuration */
+        EXTI->IMR1 &= ~((uint32_t)iocurrent);
+        EXTI->EMR1 &= ~((uint32_t)iocurrent);
+
+        /* Clear Rising Falling edge configuration */
+        EXTI->RTSR1 &= ~((uint32_t)iocurrent);
+        EXTI->FTSR1 &= ~((uint32_t)iocurrent);
+      }
+    }
+    
+    position++;
+  }
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup GPIO_Exported_Functions_Group2 IO operation functions 
+ *  @brief GPIO Read, Write, Toggle, Lock and EXTI management functions.
+ *
+@verbatim
+ ===============================================================================
+                       ##### IO operation functions #####
+ ===============================================================================
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Read the specified input port pin.
+  * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
+  * @param  GPIO_Pin: specifies the port bit to read.
+  *         This parameter can be GPIO_PIN_x where x can be (0..15).
+  * @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(GPIO_Pin));
+
+  if((GPIOx->IDR & GPIO_Pin) != (uint32_t)GPIO_PIN_RESET)
+  {
+    bitstatus = GPIO_PIN_SET;
+  }
+  else
+  {
+    bitstatus = GPIO_PIN_RESET;
+  }
+  return bitstatus;
+}
+
+/**
+  * @brief  Set or clear the selected data port bit.
+  *
+  * @note   This function uses GPIOx_BSRR and GPIOx_BRR registers 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..H) to select the GPIO peripheral for STM32L4 family
+  * @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).
+  * @param  PinState: specifies the value to be written to the selected bit.
+  *         This parameter can be one of the GPIO_PinState enum values:
+  *            @arg GPIO_PIN_RESET: to clear the port pin
+  *            @arg 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(GPIO_Pin));
+  assert_param(IS_GPIO_PIN_ACTION(PinState));
+
+  if(PinState != GPIO_PIN_RESET)
+  {
+    GPIOx->BSRR = (uint32_t)GPIO_Pin;
+  }
+  else
+  {
+    GPIOx->BRR = (uint32_t)GPIO_Pin;
+  }
+}
+
+/**
+  * @brief  Toggle the specified GPIO pin.
+  * @param  GPIOx: where x can be (A..H) to select the GPIO peripheral for STM32L4 family
+  * @param  GPIO_Pin: specifies the pin to be toggled.
+  * @retval None
+  */
+void HAL_GPIO_TogglePin(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_PIN(GPIO_Pin));
+
+  GPIOx->ODR ^= GPIO_Pin;
+}
+
+/**
+* @brief  Lock 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..H) to select the GPIO peripheral for STM32L4 family
+  * @param  GPIO_Pin: specifies the port bits to be locked.
+  *         This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
+  * @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_LOCK_INSTANCE(GPIOx));
+  assert_param(IS_GPIO_PIN(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 bit*/
+  tmp = GPIOx->LCKR;
+
+  if((GPIOx->LCKR & GPIO_LCKR_LCKK) != RESET)
+  {
+    return HAL_OK;
+  }
+  else
+  {
+    return HAL_ERROR;
+  }
+}
+
+/**
+  * @brief  Handle EXTI interrupt request.
+  * @param  GPIO_Pin: Specifies the port pin connected to corresponding 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 callback.
+  * @param  GPIO_Pin: Specifies the port pin connected to corresponding EXTI line.
+  * @retval None
+  */
+__weak void HAL_GPIO_EXTI_Callback(uint16_t 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****/