Hi,

I'm going to program Meggy Jr RGB with Assembler language because I want to try multiplexing and SPI.
But first I've a question: To switch a led on I have to clear the row pin at the port and set the column pin at the led driver. The driver controlls the current through the led. So is it correct that it is possible to switch any led on and stop the program than?

P.S.: If my question is incomprehensible please tell me. This maybe because of my English isn't that good.

Quote by: mcb

Hi,

I'm going to program Meggy Jr RGB with Assembler language because I want to try multiplexing and SPI.
But first I've a question: To switch a led on I have to clear the row pin at the port and set the column pin at the led driver. The driver controlls the current through the led. So is it correct that it is possible to switch any led on and stop the program

You can light any single LED or any "row" of LEDs (column, using standard orientation) and stop there. However, because the display is multiplexed, you cannot turn on other possible combinations of LEDs and stoo it there.

Hi,

thank you for your fast reply.