I2C and Ds1307 direction bit question

DigitalC

I am practicing with the I2C protocal using the stampworks SW21-Ex33 program with the DS1307 real-time clock.
I was reading the Ds1307 data sheet and it states that the last bit of the address byte is the direction bit (1 for read and 0 for write)
The stamp works program uses the same device ID for both the read and write subroutines using I2COUT and I2CIN. I see how the device ID byte will work for the write mode but do not see the 1 bit that would be required for a read mode. Is this bit handled by the I2Cin and I2COUT commands automaticaly?
Thank you for your help

DigitalC

Mike Green

Yes, the direction bit is handled by the I2CIN and I2COUT statements. The reason is that a read operation (I2CIN) actually consists of a write operation that provides the address followed by a read operation as specified in the statement. The PBasic interpreter has to force write mode, then read mode to get the work done.