Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
05/29/10 11:12
Read: times


 		 #176285 - Why will jnb RI,$ screw up?
Responding to: ???'s previous message
Erik,

Thanks for sticking with this!

OK - not an ISR - but I still need it to work. I know it mixes interrupt driven and non-interrupt driven IO. I inherited this and need to extend it a bit without rewriting the lot...

Can you explain a bit more why including jnb RI,$ in the interrupt handler won't work? Actually this does work fine on port 0. I just can't get it to work on port 1. Since interrupts on the port are turned off within the interrupt handler, why can't I use this "wait for RI" approach?

Thanks - Rowan

List of 38 messages in thread
TopicAuthorDate
Trouble with interrupt driven comms on 80C320 serial port 1            01/01/70 00:00      
   CLR ES1?            01/01/70 00:00      
      Good idea but not the solution            01/01/70 00:00      
         As Erik posted, may be the etc. part            01/01/70 00:00      
   I cant' tell if there is a problem in ...            01/01/70 00:00      
      Which ... are you worrying about?            01/01/70 00:00      
         How about commenting "etc"            01/01/70 00:00      
         please post as is, not all the ...            01/01/70 00:00      
            Again without the conditionals            01/01/70 00:00      
               this is NOT an ISR            01/01/70 00:00      
                  Why will jnb RI,$ screw up?            01/01/70 00:00      
                     stick a state machine in the ISR            01/01/70 00:00      
                        To interrupt or not...            01/01/70 00:00      
                           an example            01/01/70 00:00      
                              Avoid infinite loops like the plague            01/01/70 00:00      
                                 Back to the subject - why won't it interrupt?            01/01/70 00:00      
                                    Serial Port Interrupts            01/01/70 00:00      
                                       Yes, I think I've done this correctly            01/01/70 00:00      
                                          Vector Address...            01/01/70 00:00      
                                             I think I've done this correctly...            01/01/70 00:00      
                                                you had me there            01/01/70 00:00      
                                                   Serial port, not port            01/01/70 00:00      
                                          maybe not            01/01/70 00:00      
                                             ES1 is non-standard            01/01/70 00:00      
                                                probably the most common misumderstanding            01/01/70 00:00      
                                                   Thanks for clarification...            01/01/70 00:00      
                                             It works without interrupts...            01/01/70 00:00      
                                                then ...            01/01/70 00:00      
                                                   Even Better ...            01/01/70 00:00      
                                    maybe it does            01/01/70 00:00      
                                       Two things argue against this...            01/01/70 00:00      
   Dunno, but that's a very useful instruction            01/01/70 00:00      
   Dunno..            01/01/70 00:00      
      I have problem with serial port 1 on ds89c450 (www.maxim-ic            01/01/70 00:00      
         MUCH better description needed            01/01/70 00:00      
            not it is not language            01/01/70 00:00      
               Which register bank are you using?            01/01/70 00:00      
                  yes it works now            01/01/70 00:00      

Back to Subject List