I2C(Inter-Integrated Circuit)是一种串行通信协议,广泛用于微控制器和各种外围设备之间的通信。STM32 HAL库提供了丰富的API函数,用于配置和控制I2C通信。 2. 阐述STM32作为I2C从设备(Slave)的基本概念和用途 在I2C通信中,设备分为两类:主设备(Master)和从设备(Slave)。主设备负责发起通信并产生时钟信号,而从设备...
I2C_HandleTypeDef hi2c1; void I2C1_Init(void) { hi2c1.Instance = I2C1; hi2c1.Init.ClockSpeed = 100000; // 主机时钟频率(从机模式下此参数不影响从机) hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2; // 占空比(仅在主机模式有效) hi2c1.Init.OwnAddress1 = 0x0A << 1; // 从机地址(左移1...
我看I2C的协议里面的地址是7bit的,那最后一位为0,代表主机向从机写数据,最后一位为1,代表主机从从机读数据,是这样的吗? 谢谢大侠解答 斌无非师范 2018-06-24 01:28:22 STM32 IO口模拟I2C(附源代码) I2C英文名为inter-Integrated Circuit,是用于多设备通讯的两线式串行总线,分为主机Master和从机Slave,...
I2C有2種不同模式可以操作使用master 與 slave模式,大部分在操控sensor MCU都是以master模式去做操控,部分EEPROM會需要搭配MCU作為slave操作,但當slave HAL會需要已知長度才能正常work,這邊會特別介紹LL模式修正不特定長度 STM32CubeMX Setting Stm32cubeMX上的設定Master與Slave基本上沒有太大差異,唯一要注意的是slave...
I2C Speed Mode: IIC模式设置 快速模式和标准模式。实际上也就是速率的选择。 I2C Clock Speed:I2C传输速率,默认为100KHz Slave features 从模式特性 Clock No Stretch Mode: 时钟没有扩展模式 IIC时钟拉伸(Clock stretching)clock stretching通过将SCL线拉低来暂停一个传输.直到释放SCL线为高...
We know that the I2C is a synchronous communication, so both the master and slave should be doing the same thing at the same time. For example, if the slave is sending the 4th bit of the data, then the master should also be looking for the 4th bit of the data. ...
One with the I2C scanner example (https://github.com/stm32duino/Arduino_C ... canner.ino) with speed set to 400kHz and one with your code that I've cleaned and use the default Wire instance which are already on PB7/PB6: Code: Select all #include <Wire.h> #define SLAVE_ADR 0x...
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) { /* If the timeout delay is exeeded, exit with error code */ if ((timeout--) == 0) return 0xFF; } /* Send DCMI selcted device slave Address for write */ I2C_Send7bitAddress(I2C1, MEM_DEVICE_READ_ADDR, I2C_Directio...
可以实现I2C接收消息的异步,效率也是更高。 ST提供I2C接口有: (#)Blockingmode functions are:(++)HAL_I2C_Master_Transmit()(++)HAL_I2C_Master_Receive()(++)HAL_I2C_Slave_Transmit()(++)HAL_I2C_Slave_Receive()(++)HAL_I2C_Mem_Write()(++)HAL_I2C_Mem_Read()(++)HAL_I2C_IsDeviceReady()(#)No...
因为DMA从功能上来说独立于内核之外，实现内存(SRAM,SDRAM等)到内存，内存到外设(I2C,SPI等), 外设(...