stm32f407_i2c_read_write_example uint8_t Write_24Cxx(uint16_t Addr, uint8_t Data, uint8_t Mem_Type) { uint32_t timeout = I2C_TIMEOUT_MAX; uint8_t upper_addr,lower_addr; lower_addr = (uint8_t)((0x00FF)&Addr); if(Mem_Type==M24512) { Addr = Addr>>8; upper_addr = ...
default) w (read word data) c (write byte/read byte) Append p for SMBus PEC ...
(1)通过read、write实现对I2C设备的操作 #include <stdio.h>#include<fcntl.h>#include<unistd.h>#include<malloc.h>#include<sys/ioctl.h>#include<string.h>#include<linux/i2c.h>#include<linux/i2c-dev.h>#defineSLAVE_ADDRESS 0x50#defineI2C_WRITE_FLAG 0x00#defineI2C_READ_FLAG 0x01#defineUSAGE "...
在main.c 头部添加写地址0xA0,读地址0xA1,写缓存区WriteBuffer,读缓存区ReadBuffer。 /* Private variables ---*/I2C_HandleTypeDef hi2c1;UART_HandleTypeDef huart1;/* USER CODE BEGIN PV */#defineADDR_24LCxx_Write 0xA0#defineADDR_24LCxx_Read 0xA1#defineBufferSize 256uint8_tWriteBuffer[BufferSize...
The example code what they shared , later using MICKOE compiler library to continue the code . They are not using MPLAB IDE itself to read I2c Data and write. The Mcc configuration is easy . later how to use mcc function to read data is not explained. I have tried using library but ...
I am trying to use the Kinetis SDK v2.3 with a TWR-K64F to read and write a 16kBit serial EEPROM (Microchip 24LC16B). Specifically, I am using the i2c_polling_b2b_transfer_master example and have simply changed the 7-bit slave address to that of the EEPROM (in this case, 0x50, ...
其实普通的设备驱动也可以用两种方法实现,1)构建字符设备驱动,在open,read,write等函数中直接操作i2c总线的相关寄存器来读写i2c设备,但是这种方法因平台不同,设备不同都要重新写驱动,2)在设备驱动中调用i2c-core.c提供的i2c_transfer函数来实现和i2c设备的通信,这样只要对不同的设备写不同的驱动就行了。
write((SHT2X_SLAVEADDRESS<<1)|I2C_WRITE); // write to slave 0x40 // u8Ack = (u8Ack<<1)|i2c_write(SHT2X_CMD_RD_REG); // request to read from user register // i2c_start(); // send start sequence (S) // u8Ack = (u8Ack<<1)|i2c_write((SHT2X_SLAVEADDRESS<<1)|I2C_READ...
DATA are LENGTH bytes for a write message. They can be shortened by a suffix:= (keep value constant until LENGTH)+ (increase value by 1 until LENGTH)- (decrease value by 1 until LENGTH)p (use pseudo random generator until LENGTH with value as seed)Example (bus 0, read 8 byte at ...
0x3f of the I2C device at 7-bit address 0x2d on bus 1 (i2c-1), using the default read ...