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20-Apr-23 0:30

Hi All,
Do we have an Embedded page or shall I ask in C/C++ forum..?
Glenn.

Richard MacCutchan20-Apr-23 0:44

20-Apr-23 0:44

Maybe this is what you are looking for: CodeProject Stuff[^]

Greg Utas20-Apr-23 0:46

Greg Utas

20-Apr-23 0:46

Richard, Richard. I don't think I've seen you troll anyone before. Big Grin | :-D

Robust Services Core | Software Techniques for Lemmings | Articles
The fox knows many things, but the hedgehog knows one big thing.

Richard MacCutchan20-Apr-23 1:34

20-Apr-23 1:34

Well, pardon me for trying.
The title of the question led me to believe that Glenn is looking to embed a pictire of Bob somewhere.

Greg Utas20-Apr-23 2:00

Greg Utas

20-Apr-23 2:00

He did wonder if should post in the C/C++ forum, hence my conclusion.

Robust Services Core | Software Techniques for Lemmings | Articles
The fox knows many things, but the hedgehog knows one big thing.

Richard MacCutchan20-Apr-23 2:06

20-Apr-23 2:06

I guess I wasn't really looking to closely.

Gary Wheeler21-Apr-23 2:07

Gary Wheeler

21-Apr-23 2:07

He was just being a dick.
[rim-shot]

Software Zen: delete this;

Kornfeld Eliyahu Peter20-Apr-23 0:46

Kornfeld Eliyahu Peter

20-Apr-23 0:46

I think the question is about where to post a question about embedded systems... Sigh | :sigh:

"If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilization." ― Gerald Weinberg

glennPattonWork320-Apr-23 0:55

20-Apr-23 0:55

Well in all fairness I need to ask a question on C programming to make sure I am not missing something. I was in the middle of writing a document (not related) and thought Green Alien | [Alien]

might know. So in all fairness I deserved the trolling.

honey the codewitch20-Apr-23 4:27

honey the codewitch

20-Apr-23 4:27

I do IoT stuff, which is related and similar, and am diving into more embedded here.

For my part, I just ask C questions in the C section, whether it's embedded or not.

What's harder is asking about the things where the hardware and firmware meet, but typically I'll just consider that a programming question, tag it as best I can, and then make sure I'm clear about what I'm doing in the description.

There are enough embedded devs here I think you'll be able to cast a net and get something that way.

To err is human. Fortune favors the monsters.

glennPattonWork320-Apr-23 7:55

20-Apr-23 7:55

Not to worry I solved the original problem and as is the case meant something else broke, bodged that. Now being left over night to see what breaks next... The LCD driver is a pain yes, you can send it an integer or float but will display a decimal point? Some times yes some times no, and will it return I2C address? (so I can hook up a real time clock that use I2C) No is the answer. Shall I try to get the data sheet, oh company went bust and some genius bought a load of LCD's on Ebay... Roll eyes | :rolleyes:

Circuit diagrams, who needs those!
Glenn (I need Beer | [beer]

)

honey the codewitch20-Apr-23 11:23

honey the codewitch

20-Apr-23 11:23

You're probably using a crappy graphics driver.

I have one that may work better for you depending on the type of MCU you're using, but your best bet is to actually use

sprintf(tmp,"formatspecifier",value);

and then display tmp so you have total control over the formatting of it.

To err is human. Fortune favors the monsters.

glennPattonWork320-Apr-23 13:36

20-Apr-23 13:36

Quote:
You're probably using a crappy graphics driver.

Graphics Driver I wish, No RTOS a while(1) or a for(;;)...

Quote:
sprintf(tmp,"formatspecifier",value);

I would have to load stdio for sprintf()... no room. Think it's the I2C having a bit of noise. Will play more tomorrow.
Thanks Glenn

honey the codewitch20-Apr-23 13:38

honey the codewitch

20-Apr-23 13:38

I meant the library you're using to communicate to your I2C or SPI display.

Clearly, I don't know enough about your platform.

It might be simpler to just roll your own ftoa type function

To err is human. Fortune favors the monsters.

glennPattonWork320-Apr-23 22:26

20-Apr-23 22:26

Interesting...get the scope on the pins lots of noise I think the fault is with the board, I'm gonna start probing... Also know of a good I2C reference... Wink | ;)

kholsinger21-Apr-23 4:25

kholsinger

21-Apr-23 4:25

Check the values of the pullup resistors. Too low and the drivers can't sink the current. Too high and they can't deal with the capacitance of the wires (sounds like you must have wires to an off-board display). You might try twisting wires, too, thought that's more to keep radiated noise out of other circuits.

glennPattonWork321-Apr-23 8:11

21-Apr-23 8:11

Yup I know, wires all over the place, but I did look into that. I think I may be on to the issue the board, I am using was 'claimed' from a pile of write offs and given to me (with out telling me!) so a day spent looking for the circuit diagram and hunting with a Toneohm leads me to think the I2C chip is not properly grounded took it off had a look, missing Gnd pad! start to do some surgry to the board and get caught with a meeting...more on Monday coming, I hope thanks though Thumbs Up | :thumbsup:

glennPattonWork320-Apr-23 0:55

20-Apr-23 0:55

Ok I deserved that.

Richard MacCutchan20-Apr-23 1:35

20-Apr-23 1:35

See my reply to Greg above.

glennPattonWork320-Apr-23 2:12

20-Apr-23 2:12

Nope, I know our little Green friend! I remember see stuffed Bob's somewhere... has he been licensed?

Kornfeld Eliyahu Peter20-Apr-23 0:48

Kornfeld Eliyahu Peter

20-Apr-23 0:48

If it is more about the hardware part - you should go here: https://www.codeproject.com/Forums/186301/Hardware-Devices
Otherwise go with the programming language you use...

"If builders built buildings the way programmers wrote programs, then the first woodpecker that came along would destroy civilization." ― Gerald Weinberg

glennPattonWork320-Apr-23 2:14

20-Apr-23 2:14

Nope, solved it myself, posted the question and face palm came up with a solution...

den2k8820-Apr-23 1:48

den2k88

20-Apr-23 1:48

Try pinging honey the codewitch directly, probability is she'd be the only one to answer anyway Big Grin | :-D

GCS/GE d--(d) s-/+ a C+++ U+++ P-- L+@ E-- W+++ N+ o+ K- w+++ O? M-- V? PS+ PE Y+ PGP t+ 5? X R+++ tv-- b+(+++) DI+++ D++ G e++ h--- r+++ y+++* Weapons extension: ma- k++ F+2 X

glennPattonWork320-Apr-23 2:42

20-Apr-23 2:42

I fixed it, wrote the question though about it and solved it about two seconds after I posted it, tried it, Working all is good!