nrf52840 builds - no REPL - USB connections fail

[jerryneedell]

Just built current master for pca10059 - after copying .uf2 to board, CIRCUITPY appears for awhile, but
cannot access REPL -- screen /dev/ttyACM0 115200 attaches for awhile, then disconnects -- a few minutes later CIRCUITPY also disappears.

[211289.957497] usb-storage 3-3.2.4:1.2: USB Mass Storage device detected
[211289.957836] scsi host7: usb-storage 3-3.2.4:1.2
[211289.959843] input: Adafruit Industries CircuitPy nRF52 as /devices/pci0000:00/0000:00:14.0/usb3/3-3/3-3.2/3-3.2.4/3-3.2.4:1.3/0003:239A:802A.0019/input/input32
[211290.018693] hid-generic 0003:239A:802A.0019: input,hidraw4: USB HID v1.11 Keyboard [Adafruit Industries CircuitPy nRF52] on usb-0000:00:14.0-3.2.4/input3
[211290.982878] scsi host7: scsi scan: INQUIRY result too short (5), using 36
[211290.982888] scsi 7:0:0:0: Direct-Access     Adafruit CircuitPY nRF52  1.0  PQ: 0 ANSI: 2
[211290.983549] sd 7:0:0:0: Attached scsi generic sg2 type 0
[211290.983902] sd 7:0:0:0: [sdc] 512 512-byte logical blocks: (262 kB/256 KiB)
[211290.984207] sd 7:0:0:0: [sdc] Write Protect is off
[211290.984209] sd 7:0:0:0: [sdc] Mode Sense: 03 00 00 00
[211290.984502] sd 7:0:0:0: [sdc] No Caching mode page found
[211290.984509] sd 7:0:0:0: [sdc] Assuming drive cache: write through
[211290.994468]  sdc:
[211290.996246] sd 7:0:0:0: [sdc] Attached SCSI removable disk
[211291.235970] FAT-fs (sdc): Volume was not properly unmounted. Some data may be corrupt. Please run fsck.
[211330.367029] usb 3-3.2.4: reset full-speed USB device number 34 using xhci_hcd
[211335.690912] usb 3-3.2.4: device descriptor read/64, error -110
[211351.307279] usb 3-3.2.4: device descriptor read/64, error -110
[211351.499294] usb 3-3.2.4: reset full-speed USB device number 34 using xhci_hcd
[211356.683346] usb 3-3.2.4: device descriptor read/64, error -110
[211372.299734] usb 3-3.2.4: device descriptor read/64, error -110
[211372.507739] usb 3-3.2.4: reset full-speed USB device number 34 using xhci_hcd
[211377.577976] usb 3-3.2.4: device descriptor read/8, error -110
[211382.954068] usb 3-3.2.4: device descriptor read/8, error -110
[211383.140178] usb 3-3.2.4: reset full-speed USB device number 34 using xhci_hcd
[211388.330161] usb 3-3.2.4: device descriptor read/8, error -110
[211393.706252] usb 3-3.2.4: device descriptor read/8, error -110
[211393.812276] usb 3-3.2.4: USB disconnect, device number 34
[211393.984322] cdc_acm 3-3.2.4:1.0: ttyACM0: USB ACM device
[211394.128183] usb 3-3.2.4: new full-speed USB device number 35 using xhci_hcd
[211399.436314] usb 3-3.2.4: device descriptor read/64, error -110
[211415.052632] usb 3-3.2.4: device descriptor read/64, error -110
[211415.260621] usb 3-3.2.4: new full-speed USB device number 36 using xhci_hcd
[211420.428748] usb 3-3.2.4: device descriptor read/64, error -110
[211436.045022] usb 3-3.2.4: device descriptor read/64, error -110
[211436.153188] usb 3-3.2-port4: attempt power cycle
[211436.777056] usb 3-3.2.4: new full-speed USB device number 37 using xhci_hcd
[211441.835132] usb 3-3.2.4: device descriptor read/8, error -110
[211447.211190] usb 3-3.2.4: device descriptor read/8, error -110
[211447.417248] usb 3-3.2.4: new full-speed USB device number 38 using xhci_hcd
[211452.587455] usb 3-3.2.4: device descriptor read/8, error -110
[211457.963558] usb 3-3.2.4: device descriptor read/8, error -110
[211458.069575] usb 3-3.2-port4: unable to enumerate USB device
jerryneedell@Ubuntu-Macmini:~$ 

[jerryneedell]

Build for feather_nrf528232 works OK.

[jerryneedell]

Tried rebuilding and flashing latest nrf52 Bootloader to pca10059 Dongle -- same result

[jerryneedell]

Also tried on the PCA10056 DK - same result as PCA10059.
For this I also used the latest bootloader.

[jerryneedell]

Reverted PCA10056 DK to build from 20180921 and it works OK
Same for PCA10059 Dongle -- 20180921 build works

Press any key to enter the REPL. Use CTRL-D to reload.
Adafruit CircuitPython 4.0.0-alpha.1-2-gf2c960e89 on 2018-09-21; PCA10059 nRF52840 Dongle with nRF52840
>>>

[uhrheber]

I can confirm that. I had flashed a pca10059 some days ago, and it works. Today, I updated my local rep, and flashed a new stick, and I have the same problems. It seems that the latest commits to lib/tinyusb broke the nrf port for nRF52840.

[dhalbert]

Fixed by #1241. Pull the latest and see if it works for you.

[dhalbert]

make sure you git submodule update after pulling

[klardotsh]

I had the broken REPL problem as well intermittently after rebasing my CircuitPython fork off master. Changing baud from 11-whatever to 9600 fixed it for me, though on rare occasion the device flips back to the higher baud.......

I get the device freezes/hard locks when importing a heavy module, though - feels like something hitting a while True loop, though I know it's probably not :) otherwise at 9600 I can while True: print to REPL literally all day (confirmed by leaving mine running while I was at work yesterday)

Device code in this branch if it's relevant: https://github.com/KMKfw/circuitpython/commit/6c0195acd91146ffc64053f70c73d3e329e18b71

[klardotsh]

Oops, in the time it took me to write that, this was closed. Heh :)

[uhrheber]

Wow, you're fast. USB works now. There's only one remaining problem: Auto-reload doesn't work, and when triggering a soft reboot wit CTRL-D, the boot.py or main.py never run. Instead, the interpreter skips them and shows "Press any key to enter the REPL. Use CTRL-D to reload." directly in the REPL.

Only after a microcontroller.reset(), or after replugging the stick, the scripts start.

[jerryneedell]

works on the pca10059 Dongle

Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.

Press any key to enter the REPL. Use CTRL-D to reload.
Adafruit CircuitPython 4.0.0-alpha.1-57-g7b95818c4 on 2018-10-05; PCA10059 nRF52840 Dongle with nRF52840
>>> 
>>> 
>>> 
>>> 
>>> 

and on the pca10056 DK

Press any key to enter the REPL. Use CTRL-D to reload.
Adafruit CircuitPython 4.0.0-alpha.1-57-g7b95818c4 on 2018-10-05; PCA10056 nRF52840-DK with nRF52840
>>> 
>>> 
>>> 

Thank you!

[dhalbert]

@uhrheber I don't see the main.py auto-reload problem in the latest master. On a PCA10056, I wrote a simple main.py that print "hi" over and over, and it started up when I did ctrl-D. If you still see this, could you file another issue? Thanks.

[uhrheber]

Thanks, it works now. But on the way, I encountered another oddity: storage.erase_filesystem() only restarts the board, but does not erase/format the drive. Its contents remain untouched.