当I2C主机每发送完一个字节数据后,就在时钟脉冲9期间释放数据线,此时SDA 设置为输入状态,等待I2C从机应答,也就是等到I2C从机告诉主机它接收到数据了,应答信号是由从机发出的,主机需要提供应答信号所需的时钟,主机发送完 8 位数据以后紧跟着的一个时钟信号就是给应答信号使用的,从机通过将 SDA 拉低来表示发出应...
7. Set the value of rise time. 8. Set the value of fall time. 9. Click the RUN button: a) If the calculation of the timing register is completed, the following message is displayed: 根据STM32厂商提供的配置I2C时钟说明,根据自己的应用我的配置如下: 因此在配置I2C的使用Timing的值如下 然后配...
Rise Time(ns):100, Fall Time(ns):10, Coefficient of Digital Filt:0, 最后会在序号4的框中即可生成TIMINGR 寄存器的值:0x40505E8A,这样非常方便,避免头痛的计算。 下面我们来讲解初始化I2C时钟的计算方法,为了支持多主环境和从时钟延长, I2C 实现了时钟同步机制。为了实现时钟同步,需执行以下操作: 使用SCLL...
uint32_t rise_time = HAL_GetTick(); // 获取上升沿时间 while (HAL_GPIO_ReadPin(GPIO_PORT, ECHO_PIN) == GPIO_PIN_SET); // 等待Echo引脚下降沿 uint32_t fall_time = HAL_GetTick(); // 获取下降沿时间 uint32_t pulse_width = fall_time - rise_time; // 计算脉冲宽度 // 根据超声波...
• Rise time value is 65 ns and the fall time value is 5 ns. The generated value for this configuration is 0x0070D8FF. Follow this steps to configure the I2C peripheral: 1. Declare the I2C initialization structure: I2C_InitTypeDef I2C_InitStru...
communication peripheral (I2C) supporting standard mode (100 KHz), fast mode (400 KHz) and fast mode plus (1 MHz). The I2C implements a new clock scheme allowing the peripheral to be used as a wake-up source from low-power mode on address match. ...
Rise Time (ns):0 Chooses values according to speed mode, 0-1000 (standard), 0-300 (fast) Fall Time (ns):0 Chooses values according to speed mode, 0-300 (standard), 0-400 (fast) Congratulations! We have successfully used STM32CubeProgrammer and STLINK-V3SET to launch ST...
•Baudrate:selectstheI2Cbaudrate. •Address:addstheaddressoftheslavebootloaderinhexformat. •Speedmode:selectsthespeedmodeofthetransmissionStandardorFast. •Risetime:choosesvaluesaccordingtoSpeedmode,0-1000(STANDARD),0-300 (FAST). •Falltime:choosesvaluesaccordingtoSpeedmode,0-300(STANDARD),0-...
10.3. I2C触摸屏设计 10.4. USB MSC(U盘) 10.5. SDMC(SD卡) 10.6. UART DEBUG 10.7. SPI接口 10.8. FDCAN 10.9. ADC(及温度检测) 10.10. RTC时钟 10.11. PWM与定时器设计 10.12. 键盘设计 10.13. 文件系统FATS 11. 问题集锦 11.1. MDK 中文显示编译 ...
I2C Speed Frequency (KHz)100 Rise Time (ns)0 Fall Time (ns)0 Coefficient of Digital Filter0 Analog Filter0 Timing0x1060669A Clock No Stretch ModeDisabled General Call Address DetectionDisabled Primary Address Length selection7-bit Primary slave address0 ...