Protocol:默认I2C; Address length:I2C从设备地址的长度,有 7 Bit和 8 Bit,例如:从机地址在选择7 Bit时为0x48,在选择8 Bit时应该改成0x90; Address(Hex):I2C从设备的地址,数据以十六进制表示; Operation:I2C指令的读写操作,Read或Write; Delay(mS):表示发送完数据后的延时; Data(Hex):I2C指令需要收发的数...
我觉得先用i2csmbuswritebytetaosdatapclienttaostritoncmdreg0x13找到0x13这个寄存器然后用i2csmbusreadbytetaosdatapclient读里面的数据因为0x13这个寄存器是一个只读的状态寄存器所以使用i2csmbuswritebyte并不能给这个寄存器里面写东西只是用它找到这个寄存器的地址然后使用i2csmbusreadbyte读取这个寄存器的内容如果是这样...
The address always has to be sent as the first byte after the start condition in the I2C-bus protocol. The last bit of the address byte is the read/write-bit which sets the direction of the following data transfer 从芯片原理图得知A0,A1,A2接地，1001000X，那么其地址就是0x90或者是0x91，...
我觉得先用i2c_smbus_write_byte(taos_datap->client, (TAOS_TRITON_CMD_REG | 0x13))找到0x13这个寄存器,然后用i2c_smbus_read_byte(taos_datap->client)读里面的数据,因为0x13这个寄存器是一个只读的状态寄存器,所以使用i2c_smbus_write_byte并不能给这个寄存器里面写东西,只是用它找到这个寄存器的地址,然...
unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data); int (*smbus_xfer_atomic)(struct i2c_adapter *adap, u16 addr, unsigned short flags, char read_write, u8 command, int size, union i2c_smbus_data *data); ...
25. res = i2c_smbus_xfer_emulated(adapter, addr, flags, read_write, 26. command, protocol, data); 27. return res; 28. } 如果adapter有smbus_xfer()函数,则直接调用它发送数据。否则也就是在adapter不支持smbus协议的情况下,调用i2c_smbus_xfer_emulated()继续处理。根据(一)中的总线驱动是不支持...
void eeprom_i2c_write(byte address, byte from_addr, byte data) { Wire.beginTransmission(address); Wire.send(from_addr); Wire.send(data); Wire.endTransmission(); } byte eeprom_i2c_read(int address, int from_addr) { Wire.beginTransmission(address); Wire.send(from_addr); Wire.endTransmission...
Protocol:默认I2C; Address length:I2C从设备地址的长度,有 7 Bit和 8 Bit,例如:从机地址在选择7 Bit时为0x48,在选择8 Bit时应该改成0x90; Address(Hex):I2C从设备的地址,数据以十六进制表示; Operation:I2C指令的读写操作,Read或Write; Delay(mS):表示发送完数据后的延时; ...
先写一次地址,然后再开始读数据,即分为两次消息,这个时候read(),write()函数就不能正常读写了,因为先write()地址之后总线上会有stop,之后read(),就与figure 5中所示(中间没有stop)不符了,所以必须利用ioctl函数来发送两条消息,这样中间就没有stop了,发送完这两条消息才有stop。
The read and write protocol contains the address frame with the binary address of the node and another data frame that contains the data being transmitted, start and stop conditions, repeated start bits, read/write bits, and acknowledge/not acknowledge bits between each data frame...