LDmicro Forum - Dot Matrix

Dot Matrix (by latetech)

Hi all
Can anybody help me with example with 8*8 dot matrix using pic16f628a up down counter for lift (for example).
thanks

Sat Jul 2 2016, 07:51:27

(no subject) (by MGP)

LDmicro is not fast enough, you need another language.

I estimate that you get without mirror images only 5 frames / sec and this is far too slow, you need at least 25frames/sec.

Sat Jul 2 2016, 08:32:42

(no subject) (by Tom J.)

Hi guys, sorry to bump an old thread.

I know LDmicro isn't fast enough to drive a matrix directly but has anybody used LDmicro to drive a MAX7219?

There's a couple LED Matrix projects I'd like to gear up for and would love for LDmicro to be part of it.

MAX7219 data sheet:
https://datasheets.maximintegrated.com/en/ds/MAX7219-MAX7221.pdf

Dot Matrix display using MAX7219 from a STM8S003F3: (not that I necessarily want to use STM8S003F3)

http://www.icstation.com/icsta...-module-panel-kits-p-2609.html

Mon May 28 2018, 22:22:31

(no subject) (by MGP)

Maybe with the new instructions (#TRISCx..#PORTx...)it can be done, but I have no time to look at it.

Tue May 29 2018, 00:14:38

(no subject) (by MGP)

Thanks for de spam.... :(

I have thought about it and even with SPI it is not possible to do it.
Each character consists of 8bytes, so 26 char x 8 = 208 bytes and 10 digits x 8 = 80 bytes that is 288 bytes together.

A lookup table can only handle a maximum of 65 bytes and then you have to enter 288 hex codes.

The only possibility is to retrieve the data via RS232 / PC and for that you also need a PC program, all too much work.

Use an Arduino there are enough examples.

Thu May 31 2018, 08:01:32

8digit 7segment with pic16f877 by using max7219 (by sunil khandelwal)

Dear sir

please provide sample program and connection diagram for 8digit 7 segment with pic16f877 by using 7219.

Tue Oct 22 2019, 05:56:13