how to "shift" a data into led matrix display ?

[HenrikOlsson]

Hi,
As far as I can see the FOR TRIALI=1 TO 30 / NEXT loop (which is the bulk of the code) is repeated twice. One time for right-to-left and one time for left-to-right.
/Henrik.

[CuriousOne]

Fitted your code, you're genius!

now even with double amount of bitmap data added, whole code is only 920 bytes!

[HenrikOlsson]

No I'm definitely not but thanks anyway :-)
Might be interesting to put the bitmap data in FLASH instead of RAM (well, you're already putting it in FLASH but then loading it to RAM....). It probably won't be as straight forward but should be doable, perhaps using READCODE. Then again, if it works and does what it needs to there no need to bother....

/Henrik.

[CuriousOne]

Yes I will have to read data from EEPROM, since this is just short demo and I need a lot of data, speaking in pixels, it will be 200*5*7, quite much for solely PIC to handle.

Here's the sample video how it works:



But have no idea how to handle these parasitic lights, if I increase DRO variable, then these half lit segments go away, but then flicker is noticeable.

[CuriousOne]

Checked in details, these parasitic lit segments are on even with larger DRO values. Tried to disable internal pull-up resistors - no change. Even tried to interlace update, do a 1,3,5,7,2,4,6 row sequence - no difference.

[CuriousOne]

Solved, just added this to each line draw end routine:

c1=0
c2=0
c3=0
c4=0
c5=0