Hi: Perhaps I'm just not meant to use LCD's. I connected my new MOI-AL202C into my circuit tonight and I can't seem to write anything to it. It powers up with my board and I get the Matrix Orbital splash screen and then the display ignores me. The bottom of page 6 has an * on a paragraph that then g...

Hi Raquel: I promised an update, so here we go. I decided that there had to be something out there that would work for me with this display to at least make sure that the display is ok and that it's only the programmer that needs work. As I indicated in an earlier post, I had grabbed a 4bit library ...

Hi Raquel: Thanks for the response. It was Figure 9 in the 4 bit transfer example on page 22 of Hitachi's document that made it look like enable goes high before the data is presented. I appreciate the confirmation on the order for engaging the enable pin properly. My code would be incorrect at this...

Hi: Here is an update on progress after reviewing the full Hitachi manual. I suspect I have a timing issue in my code. In reading the Hitachi manual I am comfortable that I am sending the correct commands - certainly for initialization, and I can see what I have sent so they are verified. I download...

Hi Raquel: Thank you very much for the link that you posted. That is a very complete and much appreciated manual. I wish I had known that it was there. You can delete what I put up if you like. I think I should be able to get this going from here. Obviously there is nothing in my code that is settin...

This isn't really a reply. I am just posting some information that I found. I may be the only person who didn't know it, but someone else with limited knowledge of these things might follow me. Instruction Table Supplemental Information R/W Stands for Read / Write 0 = Read 1 = Write RS Not Sure what...

Hi Raquel: I tied them to ground as everything I found on the internet indicated that it was a good idea. I shall float them instead. Ok, I have taken the lines off of ground. I do not get characters. I do get a number of cursor flashes cycling through the display. The cursor appears to be at 1,1 fo...

Hi Troy, Thanks for the info on the resistor. I will add that in and bring my backlight back on line. From the manual it looks like I can only create 8 5x8 characters. I would love to create large digits from 0 to 9 that would span all 4 lines. Can I write to the space between lines or is it inacces...

Hi Troy: Thanks. R/W is wired to ground for sure. I was avoiding trying to code a read function as it would not be required once it is up and running. I will move the debug lines as you have suggested. I lifted the values in my initialization from a post in this forum that was about initialization p...

Hi Troy: Thanks for the information. When you say double digits, should I be assuming something in the 10K to 20K range? I appreciate your offer of assistance. I do have another post in this forum with my progress and the notation that I am not getting characters. I suspect it is a user error - me. ...

Hi: I am obviously missing something fundamental with regard to writing data to this display. I suspect it is related to the character generator and / or display memory and how to set these up or use them properly. I have been able to get the top half and bottom half of the display intitialized and ...

Hi: I find the documentation is pretty sparse for this display. I had the Backlight wired to +5 and Gnd on Pins 17 and 18. My voltage regulator was heating up very quickly. Disconnecting the Backlight solved that problem. What do I need to do to get the backlight working? All suggestions welcome Tha...