explanation on I2C command (PBP)

[Melanie]

You're pretty much there... except...

24LC32 has a BYTE as the Control Address and a WORD as the Memory Address.

Without looking at the Datasheets for those two devices you quoted I can't say, but EEPROMs for example need the Memory Address, other devices (like the RTC or I/O Expander) don't so you omit it, however in many cases it is replaced by an internal REGISTER Address for the I2C Slave Device. Again refer to your Datasheet for your particular I2C Slave device.

Example for DS1307 RTC...

I2CAddress=$D0 ' Device Address
I2CRegister=0 ' Get Seconds Register
I2CRead SDA,SCL,I2CAddress,I2CRegister,[DataA],I2CDataError

If swimming in marmalade - bring some toast...

[n0yox]

Melanie

I am having a time with the RDA1846, the data sheets says the 7 bit control address is 1110001 plus a read/write bit does I2CWRITE add this read/write bit in the proper place or do I need add it to the control address? It also says it should be sent MSB first is this how I2CWRITE handles this control byte? I am very confused !

ADDRESS VAR BYTE
DATAH VAR BYTE
DATAL VAR BYTE
I2CWRITE DATAIO,CLOCK,%1110001,ADDRESS,[DATAH,DATAL]

Thanks You!
https://dallasmakerspace.org/w/image...ing_manual.pdf "Page 5"