This file provides firmware functions to manage the following functionalities of the GPIO peripheral: More...
Go to the source code of this file.
Functions | |
void | GPIO_DeInit (GPIO_TypeDef *GPIOx) |
De-initializes the GPIOx peripheral registers to their default reset values. More... | |
void | GPIO_Init (GPIO_TypeDef *GPIOx, GPIO_InitTypeDef *GPIO_InitStruct) |
Initializes the GPIOx peripheral according to the specified parameters in the GPIO_InitStruct. More... | |
void | GPIO_PinAFConfig (GPIO_TypeDef *GPIOx, uint16_t GPIO_PinSource, uint8_t GPIO_AF) |
Changes the mapping of the specified pin. More... | |
void | GPIO_PinLockConfig (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) |
Locks GPIO Pins configuration registers. More... | |
uint16_t | GPIO_ReadInputData (GPIO_TypeDef *GPIOx) |
Reads the specified GPIO input data port. More... | |
uint8_t | GPIO_ReadInputDataBit (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) |
Reads the specified input port pin. More... | |
uint16_t | GPIO_ReadOutputData (GPIO_TypeDef *GPIOx) |
Reads the specified GPIO output data port. More... | |
uint8_t | GPIO_ReadOutputDataBit (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) |
Reads the specified output data port bit. More... | |
void | GPIO_ResetBits (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) |
Clears the selected data port bits. More... | |
void | GPIO_SetBits (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin) |
Sets the selected data port bits. More... | |
void | GPIO_StructInit (GPIO_InitTypeDef *GPIO_InitStruct) |
Fills each GPIO_InitStruct member with its default value. More... | |
void | GPIO_Write (GPIO_TypeDef *GPIOx, uint16_t PortVal) |
Writes data to the specified GPIO data port. More... | |
void | GPIO_WriteBit (GPIO_TypeDef *GPIOx, uint16_t GPIO_Pin, BitAction BitVal) |
Sets or clears the selected data port bit. More... | |
This file provides firmware functions to manage the following functionalities of the GPIO peripheral:
=============================================================================== ##### How to use this driver ##### =============================================================================== [..] (#) Enable the GPIO AHB clock using RCC_AHBPeriphClockCmd() (#) 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: Low, Medium, Fast or High. (++) 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, DAC output or comparator input. (#) Peripherals alternate function: (++) For ADC, DAC and comparators, 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 (PF0 and PF1 respectively) when the HSE oscillator is off. The HSE has the priority over the GPIO function.
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
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Definition in file stm32f30x_gpio.c.