nRF5 action!

NeverDie

@NeverDie stupid question: did you try to power it NOT from DK board and vise versa?

Just now tried it, and unfortunately it didn't make a difference. :(

The actual text of the error message that I always receive is:

c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .heap by 4 bytes
c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .stack_dummy by 4 bytes
c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .heap by 4 bytes
c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .stack_dummy by 4 bytes
c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .heap by 4 bytes
c:/users/david/appdata/local/arduino15/packages/sandeepmistry/tools/gcc-arm-none-eabi/5_2-2015q4/bin/../lib/gcc/arm-none-eabi/5.2.1/../../../../arm-none-eabi/bin/ld.exe: warning: changing start of section .stack_dummy by 4 bytes
Sketch uses 26932 bytes (5%) of program storage space. Maximum is 524288 bytes.
Open On-Chip Debugger 0.10.0-dev-00254-g696fc0a (2016-04-10-10:13)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
debug_level: 0
swd
adapter speed: 10000 kHz
cortex_m reset_config sysresetreq
nrf52.cpu: target state: halted
target halted due to debug-request, current mode: Thread
xPSR: 0x01000000 pc: 0x000008e4 msp: 0x20000400
** Programming Started **
auto erase enabled
Error: Cannot erase protected sector at 0x0
Error: failed erasing sectors 0 to 6
embedded:startup.tcl:454: Error: ** Programming Failed **
in procedure 'program'
in procedure 'program_error' called at file "embedded:startup.tcl", line 510
at file "embedded:startup.tcl", line 454
the selected serial port at file "embedded:startup.tcl", line 454
does not exist or your board is not connected

So maybe the root of the problem is that I need to do something to enable it to erase the protected sector at 0x0? That seems to be the point after which everything falls apart.

mfalkvidd

@NeverDie sorry, the ID doesn't need to be in the softdevice. It needs to be in the code for the black magic probe. Might still not be related though.

mfalkvidd

@NeverDie said in nRF5 Bluetooth action!:

Error: Cannot erase protected sector at 0x0

Could this be related to the readback protection? The video I linked before recommends issuing "monitor erase_mass" to completely reset the device and any protection.

NeverDie

@mfalkvidd said in nRF5 Bluetooth action!:

@NeverDie said in nRF5 Bluetooth action!:

Error: Cannot erase protected sector at 0x0

Could this be related to the readback protection? The video I linked before recommends issuing "monitor erase_mass" to completely reset the device and any protection.

Good one! I have a hunch you may have just cracked the problem.

I see no harm in trying a mass erase before the programming step, so I'll give it a go.

Nca78

@mfalkvidd said in nRF5 Bluetooth action!:

@NeverDie said in nRF5 Bluetooth action!:

Is no one else able to download the files either?

From the forum, no. From hightail, yes.

Direct click fails. But if you press Control key while you click, to open in a new tab, then you should be able to download files from the forum ;)

d00616

@mfalkvidd said in nRF5 Bluetooth action!:

Could this be related to the readback protection? The video I linked before recommends issuing "monitor erase_mass" to completely reset the device and any protection.

This is a simple sketch for mass erasing a nRF5 MCU. Just compile it with the option a SoftDevice is present, when a SoftDevice is present:

#include "nrf.h"

void wait_for_ready()
{
        while (NRF_NVMC->READY == NVMC_READY_READY_Busy) {
        };
}


void setup() {
        // Enable erasing flash
        NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een << NVMC_CONFIG_WEN_Pos;
        wait_for_ready();

        // Erase Flash and UICR
        NRF_NVMC->ERASEALL = 1;
        wait_for_ready();

        // Disable erasing
        NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
        wait_for_ready();

}

void loop() {
}```

NeverDie

You would think that the programmer device would just do a mass erase as part of its standard procedure, though, so it's a bit odd that it would require me to do it manually. The mass erase that Roger Clark did with his Black Magic Probe seemed nearly instant. I don't have a Black Magic Probe though.

In any case, I can't use the above sketch to do ia mass erase because it presumes I can already load a sketch onto the target--i.e. it presumes the fundamental problem is solved already.

What's the preferred way to do a mass erase? I seem to remember seeing a mass erase as an option in one of the Nordic utility softwares, but I don't recall now which one. Anyone happen to know?

NeverDie

Looking further into it, what I may need to first do is UNLOCK the Ebyte module, which appears to be a separate step from mass erasing: https://mcuoneclipse.com/2014/10/05/unlocking-and-erasing-flash-with-segger-j-link/

Toyman

@NeverDie may be some hints here:
https://learn.adafruit.com/bluefruit-nrf52-feather-learning-guide/flashing-the-bootloader

And also pay attention to their Adalink tool. The support for nrf52 was added recently.

NeverDie

By switching to a Windows 10 computer, I was able to get J-link working over USB from windows. Then I opened up J-Link Command, which mostly utiizes a command line interface. It turns out that for unlocking, the nRF52836 is not on the list of devices (see below), so I simply then issued a mass erase command, which looks as though it may have worked:

J-Link>unlock
Syntax: unlock <DeviceName>
---Supported devices---
  LM3Sxxx [<Auto>]
  Kinetis
  EFM32Gxxx
  LPC5460x
J-Link>erase
Erasing device (nRF52832_xxAA)...
J-Link: Flash download: Total time needed: 0.336s (Prepare: 0.064s, Compare: 0.000s, Erase: 0.263s, Program: 0.000s, Verify: 0.000s, Restore: 0.008s)
Erasing done.
J-Link>mem 0 100
00000000 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000010 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000020 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000030 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000040 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000050 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000060 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000070 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000080 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
00000090 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000A0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000B0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000C0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000D0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000E0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
000000F0 = FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF
J-Link>

:)

NeverDie

I received the following message from the Ebyte seller:

Sorry that the two files are incorrect, please just ignore or delete them.
We will send correct files later.

Thank you!

NeverDie

It worked! After doing the above mass erase, the nRF52832 Ebyte Module successfully programmed from the NRF52 DK. I uploaded the mysensors lightsensor sketch, and the serialGateway running on the NRF52 DK is receiving its messages. :)

Many thanks to mfalkvidd for his mass erase suggestion and for his link to the Roger Clark youtube video, which had further mass erase commentary.

Also, many thanks to d00616 for his excellent guide:
https://www.openhardware.io/view/376/MySensors-NRF5-Platform
Without that, I would have been lost on how to set anything up.

Thanks to everyone else too who made comments and suggestions. This has been a great group effort with a successful outcome. :) :) :)

Toyman

@NeverDie wow!!! Will you write a short tutorial? Is mas erase needed for EVERY time the sketch is uploaded?

Nca78

That's great news @NeverDie, thank you for your efforts and thank you also to everyone who helped !
My modules will arrive tomorrow or on Wednesday and you have saved me hours of suffering :D

NeverDie

Just now did a very quick range test, and the Ebyte nRF52832 module seems roughly comparable to the nRF52 DK for range. i.e. much better than the Adafruit nRF52832 Feather and also much better than the non-amplified nRF24L01+'s. So, whew! What a relief that is. At least for me, that means I won't need to wait for the nRF52840.

So, now the next question is whether the Ebyte nRF52832 can be made to run in DCDC mode, instead of LDO mode, to make it more suited for battery operation. At the moment, I'm not even sure how big or small a power savings that would equate to. Anyone know?

d00616

@NeverDie said in nRF5 Bluetooth action!:

So, now the next question is whether the Ebyte nRF52832 can be made to run in DCDC mode, instead of LDO mode, to make it more suited for battery operation. However, at the moment, I'm not even sure how big or small a power savings that would equate to. Anyone know?

There is no DCDC support for ESB radio at the moment. The DCDC mode is only efficient on high current states, like enabled radio and should only enabled in an defined voltage range.

NeverDie

@Toyman said in nRF5 Bluetooth action!:

Is mas erase needed for EVERY time the sketch is uploaded?

Roger Clark says not. I can't say for sure yet, as I haven't yet tried. I think the answer will probably turn out to be that if you aren't doing anything to specifically protect certain flash memory locations after programming it, then you would only need to do it once to undo and erase whatever came on the chip from the factory.

scalz

@NeverDie
like said above DCDC needs to be enabled. Then, the mcu will automatically switch between LDO mode (for light loads) and DCDC mode for higher currents loads like when mcu is wake up, or during radio comms etc.. Can be interesting in some cases.
in datasheet, DCDC mode can divide by two mcu power consumption. Side effects could be -1dB sensitivity, so it's better to filter well by using two inductors (see ref design)

d00616

I have found a simple way to mass erase the MCU. Select "None" as SoftDevice and use the "Burn Bootloader" function. There is an error generated but the device is erased.

NeverDie

@mtiutiu said in nRF5 Bluetooth action!:

I'm going to try this one too when I have time wt51822-s4at

I used your link to order some of those modules just now. They're so small and cheap that they might be nice for simple things.

With the Ebyte module now working, I'm feeling emboldened again. :)

nRF5 action!

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