Diff: stm32f4xx_gpio_mort.c

Revision:

0:34ee385f4d2d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stm32f4xx_gpio_mort.c	Sat Oct 23 05:49:09 2021 +0000
@@ -0,0 +1,616 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_gpio_mort.c
+  * @author  MCD Application Team
+  * @version V1.8.0
+  * @date    04-November-2016
+  * @brief   This file provides firmware functions to manage the following 
+  *          functionalities of the GPIO peripheral:           
+  *           + Initialization and Configuration
+  *           + GPIO Read and Write
+  *           + GPIO Alternate functions configuration
+  * 
+@verbatim  
+ ===============================================================================
+                      ##### How to use this driver #####
+ ===============================================================================       
+ [..]             
+   (#) Enable the GPIO AHB clock using the following function
+       RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOx, ENABLE);
+               
+   (#) Configure the GPIO pin(s) using GPIO_Init()
+       Four possible configuration are available for each pin:
+       (++) Input: Floating, Pull-up, Pull-down.
+       (++) Output: Push-Pull (Pull-up, Pull-down or no Pull)
+            Open Drain (Pull-up, Pull-down or no Pull). In output mode, the speed 
+            is configurable: 2 MHz, 25 MHz, 50 MHz or 100 MHz.
+       (++) Alternate Function: Push-Pull (Pull-up, Pull-down or no Pull) Open 
+            Drain (Pull-up, Pull-down or no Pull).
+       (++) Analog: required mode when a pin is to be used as ADC channel or DAC 
+            output.
+   
+   (#) Peripherals alternate function:
+       (++) For ADC and DAC, configure the desired pin in analog mode using 
+            GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AN;
+            (+++) For other peripherals (TIM, USART...):
+            (+++) Connect the pin to the desired peripherals' Alternate 
+                     Function (AF) using GPIO_PinAFConfig() function
+            (+++) Configure the desired pin in alternate function mode using
+                     GPIO_InitStruct->GPIO_Mode = GPIO_Mode_AF
+            (+++) Select the type, pull-up/pull-down and output speed via 
+                     GPIO_PuPd, GPIO_OType and GPIO_Speed members
+            (+++) Call GPIO_Init() function
+          
+   (#) To get the level of a pin configured in input mode use GPIO_ReadInputDataBit()
+            
+   (#) To set/reset the level of a pin configured in output mode use 
+       GPIO_SetBits()/GPIO_ResetBits()
+                 
+   (#) 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 2016 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_gpio_mort.h"
+#include "stm32f4xx_rcc_mort.h"
+
+/** @addtogroup STM32F4xx_StdPeriph_Driver
+  * @{
+  */
+
+/** @defgroup GPIO 
+  * @brief GPIO driver modules
+  * @{
+  */ 
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup GPIO_Private_Functions
+  * @{
+  */ 
+
+/** @defgroup GPIO_Group1 Initialization and Configuration
+ *  @brief   Initialization and Configuration
+ *
+@verbatim   
+ ===============================================================================
+                 ##### Initialization and Configuration #####
+ ===============================================================================  
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  De-initializes the GPIOx peripheral registers to their default reset values.
+  * @note   By default, The GPIO pins are configured in input floating mode (except JTAG pins).
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices.  
+  * @retval None
+  */
+void GPIO_DeInit_mort(GPIO_TypeDef_mort* GPIOx)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+
+  if (GPIOx == GPIOA_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOA, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOA, DISABLE);
+  }
+  else if (GPIOx == GPIOB_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOB, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOB, DISABLE);
+  }
+  else if (GPIOx == GPIOC_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOC, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOC, DISABLE);
+  }
+  else if (GPIOx == GPIOD_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOD, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOD, DISABLE);
+  }
+  else if (GPIOx == GPIOE_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOE, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOE, DISABLE);
+  }
+  else if (GPIOx == GPIOF_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOF, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOF, DISABLE);
+  }
+  else if (GPIOx == GPIOG_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOG, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOG, DISABLE);
+  }
+  else if(GPIOx == GPIOH_MORT)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOH, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOH, DISABLE);
+  }
+
+  /*else if (GPIOx == GPIOI)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOI, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOI, DISABLE);
+  }
+  else if (GPIOx == GPIOJ)
+  {
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOJ, ENABLE);
+    RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOJ, DISABLE);
+  }
+  else
+  {
+    if (GPIOx == GPIOK)
+    {
+      RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOK, ENABLE);
+      RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOK, DISABLE);
+    }
+  }*/
+}
+
+/**
+  * @brief  Initializes the GPIOx peripheral according to the specified parameters in the GPIO_InitStruct.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices.   
+  * @param  GPIO_InitStruct: pointer to a GPIO_InitTypeDef structure that contains
+  *         the configuration information for the specified GPIO peripheral.
+  * @retval None
+  */
+void GPIO_Init_mort(GPIO_TypeDef_mort* GPIOx, GPIO_InitTypeDef_mort* GPIO_InitStruct)
+{
+  uint32_t pinpos = 0x00, pos = 0x00 , currentpin = 0x00;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GPIO_PIN_MORT(GPIO_InitStruct->GPIO_Pin));
+  assert_param(IS_GPIO_MODE_MORT(GPIO_InitStruct->GPIO_Mode));
+  assert_param(IS_GPIO_PUPD(GPIO_InitStruct->GPIO_PuPd));
+
+  /* ------------------------- Configure the port pins ---------------- */
+  /*-- GPIO Mode Configuration --*/
+  for (pinpos = 0x00; pinpos < 0x10; pinpos++)
+  {
+    pos = ((uint32_t)0x01) << pinpos;
+    /* Get the port pins position */
+    currentpin = (GPIO_InitStruct->GPIO_Pin) & pos;
+
+    if (currentpin == pos)
+    {
+      GPIOx->MODER  &= ~(GPIO_MODER_MODER0_MORT << (pinpos * 2));
+      GPIOx->MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) << (pinpos * 2));
+
+      if ((GPIO_InitStruct->GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF))
+      {
+        /* Check Speed mode parameters */
+        assert_param(IS_GPIO_SPEED_MORT_MORT(GPIO_InitStruct->GPIO_Speed));
+
+        /* Speed mode configuration */
+        GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0_MORT << (pinpos * 2));
+        GPIOx->OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) << (pinpos * 2));
+
+        /* Check Output mode parameters */
+        assert_param(IS_GPIO_OTYPE(GPIO_InitStruct->GPIO_OType));
+
+        /* Output mode configuration*/
+        GPIOx->OTYPER  &= ~((GPIO_OTYPER_OT_0_MORT) << ((uint16_t)pinpos)) ;
+        GPIOx->OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) << ((uint16_t)pinpos));
+      }
+
+      /* Pull-up Pull down resistor configuration*/
+      GPIOx->PUPDR &= ~(GPIO_PUPDR_PUPDR0_MORT << ((uint16_t)pinpos * 2));
+      GPIOx->PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) << (pinpos * 2));
+    }
+  }
+}
+
+/**
+  * @brief  Fills each GPIO_InitStruct member with its default value.
+  * @param  GPIO_InitStruct : pointer to a GPIO_InitTypeDef structure which will be initialized.
+  * @retval None
+  */
+void GPIO_StructInit_mort(GPIO_InitTypeDef_mort* GPIO_InitStruct)
+{
+  /* Reset GPIO init structure parameters values */
+  GPIO_InitStruct->GPIO_Pin  = GPIO_Pin_All;
+  GPIO_InitStruct->GPIO_Mode = GPIO_Mode_IN;
+  GPIO_InitStruct->GPIO_Speed = GPIO_Speed_2MHz;
+  GPIO_InitStruct->GPIO_OType = GPIO_OType_PP;
+  GPIO_InitStruct->GPIO_PuPd = GPIO_PuPd_NOPULL;
+}
+
+/**
+  * @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..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx 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).
+  * @retval None
+  */
+void GPIO_PinLockConfig_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  __IO uint32_t tmp = 0x00010000;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GPIO_PIN_MORT(GPIO_Pin));
+
+  tmp |= GPIO_Pin;
+  /* Set LCKK bit */
+  GPIOx->LCKR = tmp;
+  /* Reset LCKK bit */
+  GPIOx->LCKR =  GPIO_Pin;
+  /* Set LCKK bit */
+  GPIOx->LCKR = tmp;
+  /* Read LCKK bit*/
+  tmp = GPIOx->LCKR;
+  /* Read LCKK bit*/
+  tmp = GPIOx->LCKR;
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup GPIO_Group2 GPIO Read and Write
+ *  @brief   GPIO Read and Write
+ *
+@verbatim   
+ ===============================================================================
+                         ##### GPIO Read and Write #####
+ ===============================================================================  
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Reads the specified input port pin.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @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.
+  */
+uint8_t GPIO_ReadInputDataBit_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  uint8_t bitstatus = 0x00;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
+
+  if ((GPIOx->IDR & GPIO_Pin) != (uint32_t)Bit_RESET)
+  {
+    bitstatus = (uint8_t)Bit_SET;
+  }
+  else
+  {
+    bitstatus = (uint8_t)Bit_RESET;
+  }
+  return bitstatus;
+}
+
+/**
+  * @brief  Reads the specified GPIO input data port.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @retval GPIO input data port value.
+  */
+uint16_t GPIO_ReadInputData_mort(GPIO_TypeDef_mort* GPIOx)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+
+  return ((uint16_t)GPIOx->IDR);
+}
+
+/**
+  * @brief  Reads the specified output data port bit.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  GPIO_Pin: specifies the port bit to read.
+  *          This parameter can be GPIO_Pin_x where x can be (0..15).
+  * @retval The output port pin value.
+  */
+uint8_t GPIO_ReadOutputDataBit_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  uint8_t bitstatus = 0x00;
+
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
+
+  if (((GPIOx->ODR) & GPIO_Pin) != (uint32_t)Bit_RESET)
+  {
+    bitstatus = (uint8_t)Bit_SET;
+  }
+  else
+  {
+    bitstatus = (uint8_t)Bit_RESET;
+  }
+  return bitstatus;
+}
+
+/**
+  * @brief  Reads the specified GPIO output data port.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @retval GPIO output data port value.
+  */
+uint16_t GPIO_ReadOutputData_mort(GPIO_TypeDef_mort* GPIOx)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+
+  return ((uint16_t)GPIOx->ODR);
+}
+
+/**
+  * @brief  Sets the selected data port bits.
+  * @note   This functions 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..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  GPIO_Pin: specifies the port bits to be written.
+  *          This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
+  * @retval None
+  */
+void GPIO_SetBits_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GPIO_PIN_MORT(GPIO_Pin));
+
+  GPIOx->BSRRL = GPIO_Pin;
+}
+
+/**
+  * @brief  Clears the selected data port bits.
+  * @note   This functions 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..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  GPIO_Pin: specifies the port bits to be written.
+  *          This parameter can be any combination of GPIO_Pin_x where x can be (0..15).
+  * @retval None
+  */
+void GPIO_ResetBits_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GPIO_PIN_MORT(GPIO_Pin));
+
+  GPIOx->BSRRH = GPIO_Pin;
+}
+
+/**
+  * @brief  Sets or clears the selected data port bit.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx 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).
+  * @param  BitVal: specifies the value to be written to the selected bit.
+  *          This parameter can be one of the BitAction enum values:
+  *            @arg Bit_RESET: to clear the port pin
+  *            @arg Bit_SET: to set the port pin
+  * @retval None
+  */
+void GPIO_WriteBit_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin, BitAction BitVal)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GET_GPIO_PIN(GPIO_Pin));
+  assert_param(IS_GPIO_BIT_ACTION(BitVal));
+
+  if (BitVal != Bit_RESET)
+  {
+    GPIOx->BSRRL = GPIO_Pin;
+  }
+  else
+  {
+    GPIOx->BSRRH = GPIO_Pin ;
+  }
+}
+
+/**
+  * @brief  Writes data to the specified GPIO data port.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  PortVal: specifies the value to be written to the port output data register.
+  * @retval None
+  */
+void GPIO_Write_mort(GPIO_TypeDef_mort* GPIOx, uint16_t PortVal)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+
+  GPIOx->ODR = PortVal;
+}
+
+/**
+  * @brief  Toggles the specified GPIO pins..
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  GPIO_Pin: Specifies the pins to be toggled.
+  * @retval None
+  */
+void GPIO_ToggleBits_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_Pin)
+{
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+
+  GPIOx->ODR ^= GPIO_Pin;
+}
+
+/**
+  * @}
+  */
+
+/** @defgroup GPIO_Group3 GPIO Alternate functions configuration function
+ *  @brief   GPIO Alternate functions configuration function
+ *
+@verbatim   
+ ===============================================================================
+           ##### GPIO Alternate functions configuration function #####
+ ===============================================================================  
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Changes the mapping of the specified pin.
+  * @param  GPIOx: where x can be (A..K) to select the GPIO peripheral for STM32F405xx/407xx and STM32F415xx/417xx devices
+  *                      x can be (A..I) to select the GPIO peripheral for STM32F42xxx/43xxx devices.
+  *                      x can be (A, B, C, D and H) to select the GPIO peripheral for STM32F401xx devices. 
+  * @param  GPIO_PinSource: specifies the pin for the Alternate function.
+  *         This parameter can be GPIO_PinSourcex where x can be (0..15).
+  * @param  GPIO_AFSelection: selects the pin to used as Alternate function.
+  *          This parameter can be one of the following values:
+  *            @arg GPIO_AF_RTC_50Hz: Connect RTC_50Hz pin to AF0 (default after reset) 
+  *            @arg GPIO_AF_MCO: Connect MCO pin (MCO1 and MCO2) to AF0 (default after reset) 
+  *            @arg GPIO_AF_TAMPER: Connect TAMPER pins (TAMPER_1 and TAMPER_2) to AF0 (default after reset) 
+  *            @arg GPIO_AF_SWJ: Connect SWJ pins (SWD and JTAG)to AF0 (default after reset) 
+  *            @arg GPIO_AF_TRACE: Connect TRACE pins to AF0 (default after reset)
+  *            @arg GPIO_AF_TIM1: Connect TIM1 pins to AF1
+  *            @arg GPIO_AF_TIM2: Connect TIM2 pins to AF1
+  *            @arg GPIO_AF_TIM3: Connect TIM3 pins to AF2
+  *            @arg GPIO_AF_TIM4: Connect TIM4 pins to AF2
+  *            @arg GPIO_AF_TIM5: Connect TIM5 pins to AF2
+  *            @arg GPIO_AF_TIM8: Connect TIM8 pins to AF3
+  *            @arg GPIO_AF_TIM9: Connect TIM9 pins to AF3
+  *            @arg GPIO_AF_TIM10: Connect TIM10 pins to AF3
+  *            @arg GPIO_AF_TIM11: Connect TIM11 pins to AF3
+  *            @arg GPIO_AF_I2C1: Connect I2C1 pins to AF4
+  *            @arg GPIO_AF_I2C2: Connect I2C2 pins to AF4
+  *            @arg GPIO_AF_I2C3: Connect I2C3 pins to AF4
+  *            @arg GPIO_AF_SPI1: Connect SPI1 pins to AF5
+  *            @arg GPIO_AF_SPI2: Connect SPI2/I2S2 pins to AF5
+  *            @arg GPIO_AF_SPI4: Connect SPI4 pins to AF5 
+  *            @arg GPIO_AF_SPI5: Connect SPI5 pins to AF5 
+  *            @arg GPIO_AF_SPI6: Connect SPI6 pins to AF5
+  *            @arg GPIO_AF_SAI1: Connect SAI1 pins to AF6 for STM32F42xxx/43xxx devices.       
+  *            @arg GPIO_AF_SPI3: Connect SPI3/I2S3 pins to AF6
+  *            @arg GPIO_AF_I2S3ext: Connect I2S3ext pins to AF7
+  *            @arg GPIO_AF_USART1: Connect USART1 pins to AF7
+  *            @arg GPIO_AF_USART2: Connect USART2 pins to AF7
+  *            @arg GPIO_AF_USART3: Connect USART3 pins to AF7
+  *            @arg GPIO_AF_UART4: Connect UART4 pins to AF8
+  *            @arg GPIO_AF_UART5: Connect UART5 pins to AF8
+  *            @arg GPIO_AF_USART6: Connect USART6 pins to AF8
+  *            @arg GPIO_AF_UART7: Connect UART7 pins to AF8
+  *            @arg GPIO_AF_UART8: Connect UART8 pins to AF8
+  *            @arg GPIO_AF_CAN1: Connect CAN1 pins to AF9
+  *            @arg GPIO_AF_CAN2: Connect CAN2 pins to AF9
+  *            @arg GPIO_AF_TIM12: Connect TIM12 pins to AF9
+  *            @arg GPIO_AF_TIM13: Connect TIM13 pins to AF9
+  *            @arg GPIO_AF_TIM14: Connect TIM14 pins to AF9
+  *            @arg GPIO_AF_OTG_FS: Connect OTG_FS pins to AF10
+  *            @arg GPIO_AF_OTG_HS: Connect OTG_HS pins to AF10
+  *            @arg GPIO_AF_ETH: Connect ETHERNET pins to AF11
+  *            @arg GPIO_AF_FSMC: Connect FSMC pins to AF12 
+  *            @arg GPIO_AF_FMC: Connect FMC pins to AF12 for STM32F42xxx/43xxx devices.   
+  *            @arg GPIO_AF_OTG_HS_FS: Connect OTG HS (configured in FS) pins to AF12
+  *            @arg GPIO_AF_SDIO: Connect SDIO pins to AF12
+  *            @arg GPIO_AF_DCMI: Connect DCMI pins to AF13
+  *            @arg GPIO_AF_LTDC: Connect LTDC pins to AF14 for STM32F429xx/439xx devices. 
+  *            @arg GPIO_AF_EVENTOUT: Connect EVENTOUT pins to AF15
+  * @retval None
+  */
+void GPIO_PinAFConfig_mort(GPIO_TypeDef_mort* GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF)
+{
+  uint32_t temp = 0x00;
+  uint32_t temp_2 = 0x00;
+  
+  /* Check the parameters */
+  assert_param(IS_GPIO_ALL_PERIPH(GPIOx));
+  assert_param(IS_GPIO_PIN_SOURCE(GPIO_PinSource));
+  assert_param(IS_GPIO_AF(GPIO_AF));
+  
+  temp = ((uint32_t)(GPIO_AF) << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ;
+  GPIOx->AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF << ((uint32_t)((uint32_t)GPIO_PinSource & (uint32_t)0x07) * 4)) ;
+  temp_2 = GPIOx->AFR[GPIO_PinSource >> 0x03] | temp;
+  GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;
+}
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */ 
+
+/**
+  * @}
+  */ 
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
+
+
+
+
+