Programming a smart effector

curieos · 10 Jul 2019, 16:11

@dc42 great! Do you know if a micro loaded up with the ISP arduino sketch will work with Atmel Studio, or is this more something that I'd be alone on?

dc42 · 10 Jul 2019, 18:37

@curieos said in Programming a smart effector:

@dc42 great! Do you know if a micro loaded up with the ISP arduino sketch will work with Atmel Studio, or is this more something that I'd be alone on?

I don't think Atmel Studio can drive an Arduino running ArduinoISP. But you can convert a .elf file to a .hex file. See https://stackoverflow.com/questions/19458031/how-to-create-a-executable-hex-from-elf-file-format for one possible way. I haven't tested this, but I think Arduino IDE uses a similar command.

curieos · 23 Jul 2019, 22:28

@dc42 do I need to burn a bootloader? I think I have everything wired up correctly, but I seem to be having some issues.

curieos · 23 Jul 2019, 23:17

I think I got the wrong model of ATiny44s, mine are too small to solder on the board reliably. What model of ATiny are you guys using?

Danal · 24 Jul 2019, 03:22

@curieos said in Programming a smart effector:

@dc42 do I need to burn a bootloader?

No.

dc42 · 8 Mar 2020, 15:10

@curieos said in Programming a smart effector:

I think I got the wrong model of ATiny44s, mine are too small to solder on the board reliably. What model of ATiny are you guys using?

We use the ~~smallest~~ second smallest Attiny44a, that comes in a square leadless package. You have to reflow solder them. I soldered the prototypes myself, using a Mylar stencil to place the solder paste accurately, and a hotplate.

curieos · 24 Jul 2019, 11:35

Is that a 3x3mm chip? That’s what I have I think, and the pads on the chip barely touch the pads on the board

A Former User · 24 Jul 2019, 12:06

schematic says attiny44a-mmh which is the 3x3 mm vqfn version, pads are supposed to be under the chip

dc42 · 24 Jul 2019, 17:21

That's right, the pads are under the chip.

curieos · 24 Jul 2019, 22:21

Okay, guess I’ll have to give it another shot. Thanks for the help!

A Former User · 25 Jul 2019, 01:14

You can pull it of in a frying pan, but there really isn't any substitute for solder paste or pre-tinning the pads and applying good flux. Google and youtube will show lots of home gamer ways to do smd assembly with basic tools.

curieos · 25 Jul 2019, 17:20

I have access to a reflow oven, hot air station, and several soldering irons. Also solder paste and flux. Might have gotten too much solder on the center pad, we will see when i try again.

curieos · 2 Aug 2019, 21:27

No matter how hard I try it wont line up, I don't think these fit on my board. I suspect that when I opened up the board files in KiCAD, since my libraries are different, it chose a slightly different footprint, maybe for the 4mm version. I'm ordering some new ones that should hopefully work just fine.

curieos · 15 Aug 2019, 20:46

It was the wrong part number, I got the new one installed and avrdude accepted it for programming.

curieos · 9 Nov 2019, 16:50

To continue this, several months later. I finally got around to building a second one. Unfortunately neither of them seem to work. I am able to program them, avrdude recognizes them as attiny44s, but the status light never comes on, and the probe seems to trigger somewhat randomly. Any ideas on troubleshooting? Everything else works fine, all the other lights light up, the only issue is probing. Both boards seem to have this issue.

dc42 · 10 Nov 2019, 18:11

@curieos said in Programming a smart effector:

To continue this, several months later. I finally got around to building a second one. Unfortunately neither of them seem to work. I am able to program them, avrdude recognizes them as attiny44s, but the status light never comes on, and the probe seems to trigger somewhat randomly. Any ideas on troubleshooting? Everything else works fine, all the other lights light up, the only issue is probing. Both boards seem to have this issue.

If the green trigger LED never comes on, I suggest you sort that out first. Check that it is fitted the right way round and the value of the series resistor is correct. Also, make sure you are using the correct firmware version - there are different firmwares for the version 1 and version 2 effectors.

ken340 · 3 Aug 2020, 12:10

@dc42 can you tell me the part number for the Attiny44a on ver 2.0

dc42 · 8 Mar 2020, 15:11

It's the 4mmx4mm version of the chip, which is attiny44a-mu.

ken340 · 4 Aug 2020, 14:27

@dc42 how do i programming the attiny44a already attached to smarteffector?

A Former User · 8 Apr 2020, 14:36

there should be a 6 pin header "prog"

Looks to be smd pads, so you'll have to use pogo pins or solder wires to the pads and use an avr programmer with atmel studio etc (you might get away with holding a non spring loaded header to the pads, but chances are its not a success)

edit: whoa, missing linebreak