• State Not Answered
  • Locked Locked
  • Replies 6 replies
  • Subscribers 22 subscribers
  • Views 1660 views
  • Users 0 members are here
Options
Related
How was your experience today?
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

I/O Port simulation

Percy Lee

I monitering my I/O port from Peripherials -> I/O-ports -> Port 0

But the value of P0 and Pins are always diferrent
That is very strange..

I use P0 as an LCD data bus.
I set the value of P0, When I want to display a character on LCD.

but Pins bits can't reflect the value of P0

So my LCD display can't work normally.

Does any one known what happens?

thank you..

Parents
  • 0 in reply to Percy Lee

    I don't think you really found a bug.

    First, your assertion that in an actual 8051, the state of the physical port pins and the internal register (P0) simply isn't true.

    Second, you can have those bits in P0 that are supposed to reflect pin states, i.e. the corresponding bits in the VREG PORT0, react in real-time. Just toggle View->Periodic Window Update.

Reply
  • 0 in reply to Percy Lee

    I don't think you really found a bug.

    First, your assertion that in an actual 8051, the state of the physical port pins and the internal register (P0) simply isn't true.

    Second, you can have those bits in P0 that are supposed to reflect pin states, i.e. the corresponding bits in the VREG PORT0, react in real-time. Just toggle View->Periodic Window Update.

Children
No data