示例代码: #include"stm32xxxxx.h"#include"stm32xxxxx_hal.h"I2C_HandleTypeDef hi2c1;voidSystemClock_Config(){// 配置系统时钟// ...}voidGPIO_Configuration(){// 配置GPIO引脚// ...}voidI2C_Configuration(){// 配置I2C外设hi2c1.Instance = I2C1; hi2c1.Init.Timing =0x00303D5B;// 根据具体...
STM32 HAL库 I2C 学习 1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; \\ 设置为7位地址模式 hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; \\ 禁止双地址 2020-04-26 15:09:23 CH32V103基础教程41-I2C-10位地址模式,主机接收从机发送 本章教程主要在前面第40章的基础上进行10位地址...
(); I2C_SCL = 0; //再拉低 SCL 完成应答位,并保持住总线 return ack; //返回从机应答值 } /* I2C 寻址函数,即检查地址为 addr 的器件是否存在,返回值-从器件应答值 */ bit I2CAddressing(unsigned char addr){ bit ack; I2CStart(); //产生起始位,即启动一次总线操作 //器件地址需左移一位,因...
TCA9548 1-to-8 I2C Multiplexer(0x70 - 0x77) 0x78 0x79 0x7A 0x7B - Reserved for 10-bit I2C Addressing 0x7C 0x7D 0x7E 0x7F - Reserved for Future Purposes 经过整理后发布。
10-bit I2C Addressing With 7-bit addressing only 112 I2C slave addresses are available. To prevent address clashes Philips Semiconductors (now NXP Semiconductors) has introduced a 10 bit address scheme. Devices with 7-bit and 10-bit addresses can be connected to the same I2C-bus. ...
I2C总线是PHLIPS公司推出的一种双线式半双工串行总线,是具备多主机系统所需的总线裁决和高低速器件同步功能的高性能串行总线。用于连接微控器及外围设备。I2C总线只有两根双向信号线。一根是数据线SDA,另一根是时钟线SCL。
note:注意 1111 1XXX 是 Hs-mode master code,1111 0XXX 是 10-bit slave addressing,博主后面会讲。 6、定义术语 2、I2C Architecture I2C 采用的 GPIO 一般为开漏模式,支持线与功能,但是开漏模式无法输出高电平,所以需要外部上拉。Vdd 可以采用 5V、3.3V、1.8V 等,电源电压不同,上拉电阻阻值也不同。
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT; hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE; hi2c1.Init.OwnAddress2 = 0; hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE; hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE; ...
i2c_flag_get(I2C1,I2C_FLAG_SBSEND));/* send slave address to I2C bus*/i2c_master_addressing(I2C1,0x78,I2C_TRANSMITTER);/* wait until ADDSEND bit is set*/while(!i2c_flag_get(I2C1,I2C_FLAG_ADDSEND));/* clear ADDSEND bit */i2c_flag_clear(I2C1,I2C_FLAG_ADDSEND);/* send a ...
10-bit addressing Reserved addresses General call addresses Software reset START byte Bus clear Device ID SDA and SCL signals SDA 和 SCL 都是双向线路,通过电流源或上拉电阻连接到正电源电压(见图 3)。当总线空闲时,两条线路都是高电平。 连接到总线的设备的输出级必须具有漏极开路或集电极开路才能执行线...