Going Loopy - How do i get my Loops sorted out ???

[gtvmarty]

Thanx for that, but isn't that doing the same as my original code???
Doesn't it flow down into the next label (GetData) and execute thsoe commands as previously?).

Anyway, i tried it, and it's still the same, except now the SAME digit appears on both 7-Segs during each keypress in Hyperterm.

I know this code is probably only missing 1-2 lines, or a nested loop somewehre, it's probably so obvious that i still can't see it

Marty.

[mackrackit]

Thanx for that, but isn't that doing the same as my original code???
Doesn't it flow down into the next label (GetData) and execute thsoe commands as previously?).

No, I have it reading the serial once not twice. I was thinking in your example you were sending 23. But after rereading you are sending 2 and then 3. So you want to read the serial twice. Sorry.

Try adding a time out to the serin command, if no serial data comes in after a certain amount of time the code will go to the display routine to light the LEDs up. Then go take a quick look for some serial data.

[gtvmarty]

Thanx, i'll keep digging......

[gtvmarty]

Update:

After sorting out my SerIn problem (i didnt know SerIn waits for eternity until data arrives), I managed to get my Serial to 7-seg project 'roughly' work.

However, due to to the time it takes to read/wait for SerIn data and go back to multiplex the 7-seg displays, i dont think this will EVER work in the correct fashion i anticipated.
If i shorten the timeout on SerIn then i miss incoming data, if i lengthen the timeout to get data, then the 7segs are too flickery.
With several adjusments, i have PERFECT 7seg multiplexed displays but with no ability to read SerIn data.

So, I don't think i have any option but to upgrade to a Pic'877 (i have a boxful) and use 2 ports for the 2x 7seg displays, where they can hold LATCHED data onto the 7segs, whilst the SerIn can be left to sit for eternity waiting for new data without upsetting the 7seg displays.


I encourage anyone who thinks they can make it work to prove me wrong

Regards,
Marty.

[Jerson]

Marty

I do not want to take up your challenge, but, have you considered putting the display update to be on RTCC interrupt? Solves all your problems of serin waiting.

[Archangel]

Update:

After sorting out my SerIn problem (i didnt know SerIn waits for eternity until data arrives), I managed to get my Serial to 7-seg project 'roughly' work.

However, due to to the time it takes to read/wait for SerIn data and go back to multiplex the 7-seg displays, i dont think this will EVER work in the correct fashion i anticipated.
If i shorten the timeout on SerIn then i miss incoming data, if i lengthen the timeout to get data, then the 7segs are too flickery.
With several adjusments, i have PERFECT 7seg multiplexed displays but with no ability to read SerIn data.

So, I don't think i have any option but to upgrade to a Pic'877 (i have a boxful) and use 2 ports for the 2x 7seg displays, where they can hold LATCHED data onto the 7segs, whilst the SerIn can be left to sit for eternity waiting for new data without upsetting the 7seg displays.


I encourage anyone who thinks they can make it work to prove me wrong

Regards,
Marty.

Hi Marty,
There's a lot of real estate between old grandpa F84 and an F877, despite your boxful of them . . . a 16F648A has the same footprint and pin orientation as the F84 with tons of memory and an USART to use HSERIN, and it's much simpler to breadboard. Then you don't have all those timing issues (as with grandpa). Sure Electronics has some nice SPI type 7 segment displays and some dot matrix types too (available direct or through eBay). Use 'em with old GrandPa too.