Messages

1

preenfm2 and preenfm3 / Re: PreenFM 3 Getting Started

« on: December 18, 2020, 04:31:50 PM »

Yes the blue light on the control board and blue light on the main board will flash even though I get the error message ""DFU GETSTATUS failed: stall." Does this still mean the bootloader was successfully downloaded?

I unplug the USB cable, switch the jumper for boot0 to GND and power up the Preen with no sign of the bootloader registering on the screen. I notice the blue light both on the main board and control board will flash a few times then disappear.

any idea?

2

preenfm2 and preenfm3 / Re: PreenFM 3 Getting Started

« on: December 18, 2020, 12:26:20 AM »

Hey guys, some updates. So I finally can get the preen to show up on WEBUSB DFU, but only momentarily. A few times i've gotten through the bootloader download but with the end result in error message "DFU GETSTATUS failed: stall"

I've noticed DFU in FS Mode will go in and out of being a selectable option, meaning my connection is not stable. Getting this result intermittently "DFU GETSTATUS failed: ControlTransferIn failed: NotFoundError: The device was disconnected."

Any idea? I thought it may be some left over solder flux so I've cleaned a bit off and same results.

I do noticed the blue light on the front PCB now flashing. Almost there it seems.

3

preenfm2 and preenfm3 / Re: PreenFM 3 Getting Started

« on: December 17, 2020, 08:02:17 PM »

Thanks guys, noticed I was going off the wrong assembly guide.

I have soldered PA0 PA1 PA2 PA3 PC4 PC5

Would this explain my preen's inability to connect to WebUSB DFU?
Should I desolder these/cut the headers?

4

preenfm2 and preenfm3 / PreenFM 3 Getting Started

« on: December 17, 2020, 06:09:01 PM »

Hey all,

just getting my PreenFM 3 kit assembled. I'm sure this is a relatively obvious question and its probably located in this forum somewhere, but how many of the jumper need to be installed on the back of the main board. I have jumpers for "DC IN" "USBGND" and "USB5V." I get both orange/green lights showing when USB and DC plugged in, so assuming it's getting sufficient power.  I see there's two more jumper locations 3.3v and 5v, do these need to be placed? Image attached below https://drive.google.com/file/d/1DVSPAXakP_wXmA6zzWSj3T3JOTcWFAEg/view

Next goal is to get this recognized on WebUSB DFU. Am using a Mac, but seems the device doesnt show appropriately when using my Chrome browser and WebUSB DFU. Has anyone successfully flashed using a Mac? Curious to know your methods. (jumper is placed between VCC DFU and Boot0)

I am mainly going off the page below
https://github.com/Ixox/preenfm3/wiki/Flash

Any help is appreciated