MSP430FR2433: I2C - Slave Mode - Read / Write from same register address

Hello,

Thanks for using MSP430. But I don't quite understand what you mean.

What does the register mean? The peripheral registers of MSP430?

And why same slave register address cannot be used for both read and write operation?

For i2c protocol, generally communication happens when master send slave address followed by "register address".

This concept ("register address") is what I meant by register.

Depending on whether it is read or write operation either value is written to or read from the specified register address of that slave.

In the MSP I2C slave sample codes that i collected, I could understand that whenever MSP receives such register address for eg: 0x01, only i2c read operation is performed. The code design structure is in such a way that i2c write can't be performed if 0x01 is sent by master. For doing i2c write, another register address (command) is used.

My use case is that, if I get a command like 0x01 from master and if it is write operation, then the next byte obtained from i2c should be stored to a global variable (This is i2c write operation). If again 0x01 command is received in the next i2c communication and if it is i2c read operation, then the value in the global variable should be copied to the Transmit buffer for master to read it.

Is this possible to be implemented in MSP i2c slave code.

Please provide some sample codes if there are any.

Also, is there any way to read the 8th bit of slave address that determines whether i2c operation is read/write.

Thanks

Rejath