GPIO_TypeDef* I2C_SDA_GPIO_PORT[3] = {I2C1_SDA_GPIO_PORT,I2C2_SDA_GPIO_PORT,I2C3_SDA_GPIO_PORT}; constuint16_t I2C_SDA_GPIO_PIN[3] = {I2C1_SDA_GPIO_PIN,I2C2_SDA_GPIO_PIN,I2C3_SDA_GPIO_PIN}; constuint32_t I2C_SDA_GPIO_CLK[3] = {I2C1_SDA_GPIO_CLK,I2C2_SDA_GPIO_CLK...
为外部中断线提供供电RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);//定义的GPIO_InitTypeDef结构体为GPIO配置结构体,用来给GPIOB14配置输入模式和上拉输入(Internal Pull Up)。
【Open-Drain与Push-Pull】 GPIO的功能,简单说就是可以根据自己的需要去配置为输入或输出。(General Purpose Input Output,简称为GPIO或总线扩展器,利用工业标准I2C、SMBus™或SPI™接口简化了I/O口的扩展。当微控制器或芯片组没有足够的I/O端口,或当系统需要采用远端串行通信或控制时,GPIO产品能够提供额外的控...
Currently the I2C initialization setup the SDA/SCL pin in pin_mode(sda/scl, OpenDrainPullup) which cause the internal pull-up to be activated by default on OpenDrain output. Having pull-up activated on a 5V externally pull bus, cause the pin to clamp on the STM32 die diode and could ...
In #3006 it was changed, that i2c gpios are set to Pull::Down instead of the previous Pull::None, when Config::scl_pullup is set to false (which is the default). I don't think this was an intended ...
● JTDI: Internal pull-up ● JTMS/SWDIO: Internal pull-up ● TCK/SWCLK: Internal pull-down 用户可以通过软件释放JTAG IO,GPIO控制器会控制这些管脚的状态。 GPIO控制寄存器上电复位后的上拉/下拉状态和JTAG信号一致: ● NJTRST: Input pull-up
目前有个电源组需要通过i2c进行读取,获取一些电池信息,采用SMBus协议进行读取,其可以看作i2c的子集,可以直接通过i2c的接口进行读写。 SMBus建立在被广泛采用的I2C总线之上,并定义了OSI(开放系统互连)模型的链路和网络层。PMBus™使用SMBus作为其物理层,并添加了命令定义和其他新特性。大多数新特性都属于OSI模型的中...
其中LSI(Low Speed Internal),称为低速内部时钟,RC振荡器构成,频率较低,STM32F030的为40kHz。 其中LSE(Low SpeedExternal),称为低速外部时钟,一般外接频率为32.768kHz的石英晶体。 另外PLL,是锁相环倍频输出。 4.1 STM32F030的clock框架 STM32F030的时钟的框架实现如下,应当大部分STM的芯片都适用。
IOB内部弱上拉电阻的值是多少?在Spartan-6?以上来自于谷歌翻译以下为原文What is the value of IOB internal weak pull-up resistor in Spartan-6? sdvywye2019-05-29 09:31:26 STM32中的弱上拉能做输入输出吗? STM32中的弱上拉能做输入输出吗?
HSI : High Speed Internal (Oscillator/Clock)HVAC : Heating Ventilating and Air ConditioningI : Input Only Pin (Pin Abbreviation)I/O : Input Output Pin (Pin Abbreviation)I/O : Input/Output I2C : Inter Integrated Circuit, aka I squared CI2S : Inter-IC Sound, Integrated Interchip SoundIC :...