/** ****************************************************************************** * @file stm32f4xx_gpio.c * @author MCD Application Team * @version V1.3.0 * @date 08-November-2013 * @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 * * COPYRIGHT 2013 STMicroelectronics * * 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.h"#include "stm32f4xx_rcc.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(GPIO_TypeDef* GPIOx){ /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx));

if (GPIOx == GPIOA) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOA, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOA, DISABLE); } else if (GPIOx == GPIOB) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOB, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOB, DISABLE); } else if (GPIOx == GPIOC) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOC, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOC, DISABLE); } else if (GPIOx == GPIOD) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOD, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOD, DISABLE); } else if (GPIOx == GPIOE) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOE, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOE, DISABLE); } else if (GPIOx == GPIOF) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOF, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOF, DISABLE); } else if (GPIOx == GPIOG) { RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOG, ENABLE); RCC_AHB1PeriphResetCmd(RCC_AHB1Periph_GPIOG, DISABLE); }

else if (GPIOx == GPIOH) { 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(GPIO_TypeDef* GPIOx, GPIO_InitTypeDef* 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(GPIO_InitStruct->GPIO_Pin)); assert_param(IS_GPIO_MODE(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) GPIO_Pin) & pos;

if (currentpin == pos) {

GPIOx->MODER &= ~(GPIO_MODER_MODER0 MODER |= (((uint32_t)GPIO_InitStruct->GPIO_Mode) GPIO_Mode == GPIO_Mode_OUT) || (GPIO_InitStruct->GPIO_Mode == GPIO_Mode_AF)) { /* Check Speed mode parameters */ assert_param(IS_GPIO_SPEED(GPIO_InitStruct->GPIO_Speed));

/* Speed mode configuration */ GPIOx->OSPEEDR &= ~(GPIO_OSPEEDER_OSPEEDR0 OSPEEDR |= ((uint32_t)(GPIO_InitStruct->GPIO_Speed) GPIO_OType));

/* Output mode configuration*/ GPIOx->OTYPER &= ~((GPIO_OTYPER_OT_0) OTYPER |= (uint16_t)(((uint16_t)GPIO_InitStruct->GPIO_OType) PUPDR &= ~(GPIO_PUPDR_PUPDR0 PUPDR |= (((uint32_t)GPIO_InitStruct->GPIO_PuPd) 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(GPIO_TypeDef* 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(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(GPIO_TypeDef* 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(GPIO_TypeDef* 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(GPIO_TypeDef* 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(GPIO_TypeDef* 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(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin){ /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(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(GPIO_TypeDef* GPIOx, uint16_t GPIO_Pin){ /* Check the parameters */ assert_param(IS_GPIO_ALL_PERIPH(GPIOx)); assert_param(IS_GPIO_PIN(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(GPIO_TypeDef* 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(GPIO_TypeDef* 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(GPIO_TypeDef* 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(GPIO_TypeDef* 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) AFR[GPIO_PinSource >> 0x03] &= ~((uint32_t)0xF AFR[GPIO_PinSource >> 0x03] | temp; GPIOx->AFR[GPIO_PinSource >> 0x03] = temp_2;}

/** * @} */

/** * @} */

/** * @} */

/** * @} */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/