(you are viewing a thread; or go back to
list of threads)
Need Help ... (by Hossam El Deen Mostafa)
Dear ,
your software is very useful ...it's really amazing ..
but what if i need more than 40 (inputs & outputs) totally
so when i draw the ladder then when i try to assign pins still
there is not assigned pins remaining so i need at least two
micro controllers to communicate .
how can i do this >??
i'll attach the ld file to take a look if you want
info (by Hossam El Deen Mostafa)
I'm using PIC16F877(A) 40 PIN
(no subject) (by David R)
ust the ATmega128 64 pins
Regards
David
Thank you Sir (by Hossam El Deen Mostafa)
Thank you Dear
I'll look for it
but what if i want to use PIC is there any available solution ?
i Thinking in working with two PIC 40 Pin communicate with each other but i didn't get a solution yet ..
and i think this type ATmega128 not available here in my country
but PIC 16F877 is available
(no subject) (by David R)
I would use uart, Make A controller that sends data that is received by the other pics and if the char = somthing then that output goes high that way you can have A vary large number of outputs.
I will post An example A bit later when I get home from work.
Regards
DAvid
(no subject) (by David R)
Hi try this one is the transmitter and the other is the receiver.
join the PIC's up with UART you can have have 1 transmitter and several receivers.
Sorry I did not have time to comment my code but I will have some time tomorrow to answer questions
I have also attached an ASCII chart which is vital when using UART.
(no subject) (by David R)
here is the receiver this can have many more elements added to it.
(no subject) (by David R)
here is the ASCII chart
(no subject) (by David R)
Don't forget to change the UART board rate to 9600 or something that you like I try to always use the same speed for all my projects, it is less confusing when using A terminal program to view the data.
(no subject) (by Olivier Quirion)
use multiplexer/demultiplexer chip, you can get 8 output from 3 binary input or output
Need help (by Eduardo Schramm)
Hi Mostafa,
Why don't you try SN74165? Eight outputs are enough to you? You could free some outputs of you project transfering the task to a parallel shift register using just one pin of the 877 for that.
I don't know how big is you ladder, but it's still an ideia!
Hi Mr. Westhues, great project, great improvements and it seems that you reached what you wanted: You are developing young minds, a lot of kids, a lot of ideias and I am very glad for that. I'm always reading the threads list and I perceive, realize that your project, your little executable hit the world! Indeed a lot of brazilian students frequently uses your forum as a tool to improve and grow new ideias.
I sincerely hope that people will follow your example, and new incredible simple tools (and free) like your LDMICRO, emerge on the internet as the exchange of projects and experience.---------------------------------------------BR:)
Best Regards.
Thank you Sir (by Hossam El Deen Mostafa)
Dear David R,Olivier and Eduardo
Thank you all for replying me
Sorry for latency as we have a revolution here
as I am from EGYPT
I will submit another reply after study your posts as i need to recharge myself
Post a reply to this comment:
|