STM32F4学习笔记之GPIO(使用固件库)

1 使能 GPIO 的 AHB 时钟 使用函数 RCC AHB1PeriphClockCmd RCC AHB1Periph GPIOx ENABLE 2 配置 GPIO 工作模式用 GPIO Init 函数 数据类型说明 typedef struct uint32 t GPIO Pin 引脚配置 GPIOMode TypeDef GPIO Mode GPIO Mode IN 输入 GPIO Mode OUT 输出 GPIO Mode AF 备用 GPIO Mode AN 模拟 GPIOSpeed TypeDef GPIO Speed GPIO Speed 2MHz GPIO Speed 25MHz GPIO Speed 50MHz GPIO Speed 100MHz GPIOOType TypeDef GPIO OType GPIO OType PP 推挽 GPIO OType OD 开漏 GPIOPuPd TypeDef GPIO PuPd GPIO PuPd NOPULL 无 GPIO PuPd UP 上拉 GPIO PuPd DOWN 下拉 GPIO InitTypeDef 3 备用功能配置 除 ADC 和 DAC 外的所有非 GPIO 功能 使用函数 void GPIO PinAFConfig GPIO TypeDef GPIOx uint16 t GPIO PinSource uint8 t GPIO AF This GPIO AF 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 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 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 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 EVENTOUT Connect EVENTOUT pins to AF15 4 使用 GPIO ReadInputData GPIO TypeDef GPIOx 和 GPIO ReadInputDataBit GPIO TypeDef GPIOx uint16 t GPIO Pin 读输入信号 5 使用 GPIO SetBits GPIO ResetBits 设置输出引脚 6 上电或复位后 引脚备用功能都没启用 JTAG 引脚除外 为悬浮输入 状态 7 LSE 引脚 OSC32 IN 和 OSC32 OUT PC14 and PC15 的优先级高 于 GPIO 8 HSE 引脚 OSC IN OSC OUT PH0 PH1 的优先级高于 GPIO 例程 int main void GPIO InitTypeDef GPIO InitStructure GPIOG Periph clock enable RCC AHB1PeriphClockCmd RCC AHB1Periph GPIOD ENABLE RCC AHB1PeriphClockCmd RCC AHB1Periph GPIOA ENABLE GPIO InitStructure GPIO Pin GPIO Pin 12 GPIO Pin 13 GPIO InitStructure GPIO Mode GPIO Mode OUT GPIO InitStructure GPIO OType GPIO OType PP GPIO InitStructure GPIO Speed GPIO Speed 100MHz GPIO InitStructure GPIO PuPd GPIO PuPd NOPULL GPIO Init GPIOD GPIO InitStructure GPIO Pin GPIO Pin 0 GPIO InitStructure GPIO Mode GPIO Mode IN GPIO InitStructure GPIO PuPd GPIO PuPd NOPULL GPIO Init GPIOA GPIO SetBits GPIOD GPIO Pin 12 GPIO ResetBits GPIOD GPIO Pin 13