I2c slave in busy mode

[Jinzpaul4u]

Hi there,

good wishes.

Do anybody have an idea about, how i2c slave ic can block the data from master mcu or how can it inform to master it is busy??

Thanks in advacnce

 

[Jigar 4 Electronics]

Make a program for a slave that refuse the call of master if it is busy.
It's up to you whether you give respond to slave every time or not.
you can add a concept of semaphore here (just like in RTOS)
use a variable called flag.
for whatever time your slave is busy kept that flag bit high.
and for whatever time your slave is free kept that flag low.
and make a program that if the flag is low then respond to the call of master or otherwise block it.
hope you get it.

 

[Jinzpaul4u]

Thank you for reply .. but a little confused. Do the slave can control the sda line?