Low Voltage (1.8V) on nRF52840 cannot program chip

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

haakonsh — Tue, 19 Mar 2019 13:57:57 GMT

Can you run nrfjprog -e -f nrf52 --log
and share the log?

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Thu, 14 Mar 2019 07:50:41 GMT

There is no-need to provide an 3V or 3.3V source NOR even buying the PRO version as the j-link EDU programmer by Segger can program devices with voltages 1.2-5V (see about j-link EDU here ).

I have another device with 1.8Volts that cannot be programmed also ....

Should I open another ticket ?

My system can recognize the device (dmesg output):

[Mar14 09:42] usb 3-2.4: new full-speed USB device number 11 using xhci_hcd
[  +0,114123] usb 3-2.4: New USB device found, idVendor=239a, idProduct=8029
[  +0,000002] usb 3-2.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0,000001] usb 3-2.4: Product: Bluefruit nRF52840
[  +0,000001] usb 3-2.4: Manufacturer: Adafruit Industries
[  +0,000000] usb 3-2.4: SerialNumber: E08452754177EEC0
[  +0,000875] cdc_acm 3-2.4:1.0: ttyACM0: USB ACM device
[  +0,001314] usb-storage 3-2.4:1.2: USB Mass Storage device detected
[  +0,000531] scsi host6: usb-storage 3-2.4:1.2
[  +0,124183] usb 3-2.4: USB disconnect, device number 11

but the nrfjprog cannot program the device ...

$ nrfjprog -f nrf52 --chiperase --reset
ERROR: Cannot connect to any nRF device. Please make sure a device is
ERROR: connected to the debugger and supplied.

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Wed, 06 Mar 2019 10:11:54 GMT

Same problem with new dongle, steps I followed:

1) Passed the adafruit's bootloader (github.com/.../Adafruit_nRF52_Bootloader)

using the command

nrfjprog -f nrf52 --program pca10059_bootloader-0.2.9_s140_6.1.1.hex --chiperase --reset

device turned to 1.8Volts, I turned it to 3.3V by using:

nrfjprog --memwr 0x10001304 --val 0xFFFFFFFD

2) I passed 2-3 times software using the Arduino IDE, everything OK

3 I tried giving external power to the dongle, tried a LiPo with 3.7 volts and power supply 5V

connecting then to the VBUS of the Dongle, Dongle never booted (should I open new Issue ???)

While programming it, sometime the Dongle turned to 1.8Volts again and CANNOT program it using the j-link EDU.

The

nrfjprog --memwr 0x10001304 --val 0xFFFFFFFD

returns

$ nrfjprog --memwr 0x10001304 --val 0xFFFFFFFD
Segmentation fault (core dumped)

I can use the solution you provided to me earlier (Disconnect the dongle from the USB port and supply 3V externally to the VDD circuit of the dongle, then you should be able to program with the J-Link EDU or OB.)

BUT I am afraid that sometime this Dongle could be damaged as well

When I connect this device to the PC, dmesg gives:

[Mar 6 12:08] usb 3-2.1: new full-speed USB device number 20 using xhci_hcd
[  +0,114336] usb 3-2.1: New USB device found, idVendor=239a, idProduct=8029
[  +0,000002] usb 3-2.1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  +0,000002] usb 3-2.1: Product: Bluefruit nRF52840
[  +0,000002] usb 3-2.1: Manufacturer: Adafruit Industries
[  +0,000001] usb 3-2.1: SerialNumber: 8D4C5F5CB3BB6718
[  +0,000962] cdc_acm 3-2.1:1.0: ttyACM0: USB ACM device
[  +0,001351] usb-storage 3-2.1:1.2: USB Mass Storage device detected
[  +0,000192] scsi host6: usb-storage 3-2.1:1.2
[  +0,161242] usb 3-2.1: USB disconnect, device number 20

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Wed, 06 Mar 2019 09:40:36 GMT

Even

dmesg

cannot recognize the dongle, I consider it as damaged and I am playing with another one this time

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

haakonsh — Fri, 01 Mar 2019 10:22:30 GMT

Try 'nrfjprog -f NRF52 -e' and report your result.

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

Nguyen Hoan Hoang — Fri, 01 Mar 2019 05:35:24 GMT

Try the IDAP-Link. It's a lot cheaper than the JLink pro and it can reprogram the dongle through SWD interface.

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Thu, 28 Feb 2019 13:53:27 GMT

I tried it, my results are below. No success at all

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

haakonsh — Thu, 28 Feb 2019 13:50:44 GMT

Yeah VVD_OUT. REG0 might not like it, but I think it should be safe enough.

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Thu, 28 Feb 2019 12:21:23 GMT

is there any way to check that the Dongle OR the chip are malfunctioning/burned/destroyed ?

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Thu, 28 Feb 2019 10:36:16 GMT

same error again, device reports as 3 Volts

$ JLinkExe 
SEGGER J-Link Commander V6.42f (Compiled Feb 26 2019 17:01:38)
DLL version V6.42f, compiled Feb 26 2019 17:01:29

Connecting to J-Link via USB...O.K.
Firmware: J-Link V10 compiled Feb 21 2019 12:48:07
Hardware version: V10.10
S/N: 2601*****
License(s): FlashBP, GDB
OEM: SEGGER-EDU
VTref=3.006V


Type "connect" to establish a target connection, '?' for help

but nrfjprog gives the same error

$ nrfjprog -f NRF52 --program /peripheral/blinky/hex/blinky_pca10059_mbr.hex
ERROR: Cannot connect to any nRF device. Please make sure a device is
ERROR: connected to the debugger and supplied.

also, the segmentation fault remains

$ nrfjprog --memwr 0x10001304 --val 0xFFFFFFFD
Segmentation fault (core dumped)

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

TasosR — Thu, 28 Feb 2019 10:23:32 GMT

By VDD circuit we mean the pin "VDD OUT" which is connected to the processor,right ? wont it burn the processor? I will try it instantly to see what will happen ....

RE: Low Voltage (1.8V) on nRF52840 cannot program chip

haakonsh — Thu, 28 Feb 2019 09:36:13 GMT

The default value of REG0 output is 1.8V. When you erased the REGOUT0 register in UICR you accidentally removed your ability to program the device with your J-link EDU or OB.

There are two ways you can re-flash your dongle with a proper value for REGOUT0:

1) Get your hands on a J-link Pro.

2) Disconnect the dongle from the USB port and supply 3V externally to the VDD circuit of the dongle, then you should be able to program with the J-Link EDU or OB.