How can I built a block detecting the start bit .......

[kangta]

There is a problem like this .....

I must build in block that can recieve continuous 8 serial bits and then change into a byte then transfer it to a control block to process ... the problem that how can i detect the start bit and the stop bit when i continuouly receive the bit streams.......

 

[cmos babe]

A finite sate machine.I would do something like the following. Let's say when there's no transmission the reciever remains in the idle state and recieves a continous zero.When a one is recieved (the start bit) A transition occurs to the next state let's call it the data recieve state. it remains there till 8 serial bits are recieved and at the 9th bits (the stop bit) it goes to some other state to wait for a new start bit or to error state coz no end bit was recieved.

 

[kangta]

Like this state machine !!!!

OK ! I would do some SMs like this .... thank for helping me.....