Modern Device Forum

Just send a note to support@moderndevice.com and I'm sure they will fix you up.

Don

It looks like you are not familiar with the pin layout on the Arduino board. In the photo mentioned in my previous post the TMP421 board is plugged into Arduino pins 2,3,4,5 with pin 5 being the one nearest to the 'corner' of the Arduino pc board. Now if you look at the "Arduino Pin Mapping' pa...

Maybe this will help: Go to http://shop.moderndevice.com/products/tmp421-temperature-sensor and click on the lower right photograph at the bottom of the page. This uses the V+,SCL, SDA and GND pins so I assume that the software provides for the V+ and GND at the appropriate pins. It looks like the o...

But I don't know what fuses need to be set so I'm not sure what to look for. I was afraid you were going to say that. I'm not sure either - but you can use Studio 4 and your AVRISP to find out your current fuse configuration and then do some research to find out if it is correct. Without the correc...

Any ideas on what I could try to get this working?

When you uploaded the bootloader via the ICSP header did you deal with the appropriate fuse(s) as well?

Don

It's so fundamental; how did anybody ever learn to use these boards?

The problem seems to be that the perpetrators of the Arduino software have been at it so long that they have forgotten that there are those who are just starting out.

Don

Kevin: Well I looked at your blog and found some errors, at least one of which is obviously a typo. The typo is right at the beginning - the display uses an HD44780 chip, not an HD44180. There are several places where you state that a 0x3n instruction will put the device in the 4-bit mode when in fa...

ke9tv:

I'll look at yours if you'll look at mine.

Follow the LCD Initialization and LCD Addressing links at http://web.alfredstate.edu/weimandn.

73, Don

rep:

You may be able to get your answers by using the technique mentioned here:

http://www.arduino.cc/cgi-bin/yabb2/YaB ... 1204423125

and here:

http://www.arduino.cc/cgi-bin/yabb2/YaB ... 65447037/2

Don

if there were some way to turn analog pins into digital pins

Pins A0 - A5 can also be used for digital I/O as D14 - D19.

Don

mdAndy: Sorry, I overlooked the 'Development Board' part of your heading. Paul: What I would like to see is a BBB with the analog pins turned 90 degrees so they will plug into the breadboard along with all the other pins. This would make the board only slightly longer than the BBB or Boarduino. The ...

The whole idea of the BBB is to separate the seldom used USB circuitry from the always used microcontroller. Microcontrollers are typically used to obtain input signals from sensors and provide output signals to devices in response to those signals. In this context the only purpose of the USB interf...

Paul: too bad I can't order up some time to try it out That was my problem when I was teaching this stuff. I thought that early retirement would be the solution but it just got worse. It was more than ten years after I retired that I finally was able to find enough time to do some recreational progr...

Bill: a SET_ADDRESS command will turn into a SET_DISPLAY_START_LINE command That certainly explains it. It appears that these graphical LCDs have inherited much of the instruction set structure from the character LCDs. I wonder why they didn't stick with the old technique for identifying the specifi...

Bill: I had a lot of fun tinkering with this display. I'm glad you got me started on it. That's why I had to have 2 wires going over to the analog pins Since I'm not using the serial port I used D0 and D1 for data bits. I did initially use two of the analog pins to drive my debugging LEDs which are ...

Well it's not as neat as Bill's and I am still cleaning up the code, but here is what I have so far.

Don

bperrybap:

My display arrived today from BGMicro. Can you share some code to get me started or do I have to figure it out by myself? I generally program in AVR assembly (on a BBB) but any other assembly language or even C would help.

Don

It's too neat. It can't possibly work. It must be a fraud.
Where can I get one?

Don

bperrybap: I am using Adobe Reader 8.1.5 running on XP Pro SP3. The printer driver offers no scaling options. Adobe puts it at 94% when choosing either "Fit to printable area" or "Shrink to printable area". When I look at the output after printing at 100% I see that everything se...

It printed out just a little large on my ancient HP-4P but still quite usable.

Don