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Need help or idea how to
I use 16f877 and 4x4 matrix keyboard with rutine by mister_e.
Also I use Hardware usart in PicMicro for rx-tx data to PC .
Program work on next way:
User use 4x4 keyboard and if he press key PicMicro send at that moment No:. of key from 1 to 16,taht work extra,when PC receive key No:. it return some word with index like these "128DOG" Becouse 4x20 LCD what I use have locations for chr from 128 -231 it simple to PicMicro know where must display word "DOG" .
Question hove to I thel Pic in same time when user type on keyboard to data is received from PC when I know to PicMicro can't work multitasking !
All thing must work like PC terminal and PC never send more then 8 chr to PicMicro.
Like "128ABCDE" include position in front word like you see.
Any suggest are welcome .
Regards Robert
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This will be a time slicing thingy. You could use a Timer interrupt to scan the Keyboard (look for SCAN_ONCE in my routine) + Usart interrupt for RX.
OR simply USART RX interrupt.
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Can you give me short example please.
For now you always give extra good ideas and help then one time more ;-).
When I finish project I will give it full for all with hardvare and software I promice that.
Maybe someone will need same as me.
I need that terminal becouse I dont have place for standard monitor or pc lcd and classic keyboard where i use pc for some job that is core of my problem.
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