nRF5 action!

gohan

I'm seeing a special offer for this at 2€ with coupon https://www.aliexpress.com/item/nRF52832-2-4GHz-Wireless-rf-Module-CDSENET-E73-2G4M04S-SPI-SMD-rf-Receiver-transmitter-Bluetooth-Module/32819293925.html
Should i go ahead?

NeverDie

@gohan Gee, I don't know. Can you really afford $2.55? ;)

gohan

I don't know if it is a good one and I already have a bunch of stuff I bought still in the drawer :sweat_smile:

NeverDie

@gohan For the price, it's good. I like Fanstel's better, but they have fewer exposed pins and cost more.

korttoma

@nca78 said in nRF5 Bluetooth action!:

use the GPIOTE PORT event instead or the app_button libary.

Thanks again for pointing out a possible solution but again I do not know how. I will just have to be patient and wait for someone to post an example of how to use one of the methods you mentioned.

smilvert

I have started to test a NRF51822

and I can upload to it with Arduino IDE but I want to use vim + platformio. And I think i'm quite close :)

When I ran platformio upload --target upload

GNU MCU Eclipse 64-bits Open On-Chip Debugger 0.10.0+dev-00392-gbe9ef0b0 (2018-01-12-14:56)
Licensed under GNU GPL v2
For bug reports, read
http://openocd.org/doc/doxygen/bugs.html
0x4000
Info : The selected transport took over low-level target control. The results might differ compared to plain JTAG/SWD
adapter speed: 1000 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : Unable to match requested speed 1000 kHz, using 950 kHz
Info : clock speed 950 kHz
Info : STLINK v2 JTAG v17 API v2 SWIM v4 VID 0x0483 PID 0x3748
Info : using stlink api v2
Info : Target voltage: 3.225841
Info : nrf51.cpu: hardware has 4 breakpoints, 2 watchpoints
Info : Listening on port 3333 for gdb connections
target halted due to debug-request, current mode: Thread
xPSR: 0xc1000000 pc: 0x000021a4 msp: 0x20004000
** Programming Started **
auto erase enabled
Warn : Unknown device (HWID 0x000000d1)
Warn : using fast async flash loader. This is currently supported
Warn : only with ST-Link and CMSIS-DAP. If you have issues, add
Warn : "set WORKAREASIZE 0" before sourcing nrf51.cfg/nrf52.cfg to disable it
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x2000001e msp: 0x20004000
wrote 33792 bytes from file .pioenvs/nrf51_dk/firmware.hex in 1.594509s (20.696 KiB/s)
** Programming Finished **
** Verify Started **
target halted due to breakpoint, current mode: Thread
xPSR: 0x61000000 pc: 0x2000002e msp: 0x20004000
verified 32960 bytes in 0.236646s (136.015 KiB/s)
** Verified OK **
** Resetting Target **
shutdown command invoked

and the output in Arduino IDE looks like:

Open On-Chip Debugger 0.10.0-dev-00254-g696fc0a (2016-04-09-12:07)
Licensed under GNU GPL v2
For bug reports, read
	http://openocd.org/doc/doxygen/bugs.html
debug_level: 0
0x4000
adapter speed: 1000 kHz
nrf51.cpu: target state: halted
target halted due to debug-request, current mode: Thread 
xPSR: 0xc1000000 pc: 0x0000251c msp: 0x20004000
** Programming Started **
auto erase enabled
nrf51.cpu: target state: halted
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x2000001e msp: 0x20004000
wrote 31744 bytes from file /tmp/arduino_build_390477/Si7021_TemperatureNode_v007_voltage__version_7_board_.ino.hex in 1.500105s (20.665 KiB/s)
** Programming Finished **
** Verify Started **
nrf51.cpu: target state: halted
target halted due to breakpoint, current mode: Thread 
xPSR: 0x61000000 pc: 0x2000002e msp: 0x20004000
verified 31580 bytes in 0.234860s (131.312 KiB/s)
** Verified OK **
** Resetting Target **
shutdown command invoked

and my platfromio.ini looks like:

[env:nrf51_dk]
platform = nordicnrf51
framework = arduino
board = nrf51_dk
upload_protocol = stlink

Should I modify the nrf51_dk.cfg or can anyone see whats the problem is?

gohan

What interface do you guys suggest for programming the nrf52832?

Nca78

@korttoma said in nRF5 Bluetooth action!:

@nca78 said in nRF5 Bluetooth action!:

use the GPIOTE PORT event instead or the app_button libary.

Thanks again for pointing out a possible solution but again I do not know how. I will just have to be patient and wait for someone to post an example of how to use one of the methods you mentioned.

I'm trying to implement it right now, not really useful for me as I will only have one beacon board for which I will need it, but it's a good occasion to learn. I'll post my results here, but probably next week as I'll have short holidays :)

korttoma

@nca78 :+1: no hurry ;)

Toyman

@gohan you mean programmer? Nothing beats DK with jlink.
Other options: jlink EDU, DIY BlackMagicProbe or STLink

gohan

ok, I bought 2 of the nrf52 at half the price, now what would be the cheap solution among the programmers? Jlink is on the pricy side.

Nca78

@gohan said in nRF5 Bluetooth action!:

ok, I bought 2 of the nrf52 at half the price, now what would be the cheap solution among the programmers? Jlink is on the pricy side.

Cheap jlink clones with 4 wires from AliExpress/Ebay seem to work. So does the ST-Link v2 which is probably the cheapest option.

gohan

I got kind of lost with all those jlink clones with so many different versions. The ST-Link V2 I found it on digikey and similar sites for around 18/19€, is it the right one?

Omemanti

@gohan I use both the ST-LinkV2 (2 dollars from eBay) and the NRF52832-DK both work like a charm.

Omemanti

@gohan LOL, i need to stop buying these things, got 12 just waiting to be used.. but at this price, its almost impossible to not buy them :)

Toyman

@gohan said in nRF5 Bluetooth action!:

The ST-Link V2 I found it on digikey and similar sites for around 18/19€, is it the right one?

Don't do that. Either buy $2 clones or invest into DK or:
https://www.adafruit.com/product/3571

gohan

Is this one ok? https://www.ebay.it/itm/ST-Link-V2-Programming-Unit-mini-STM8-STM32-Emulator-Downloader-M89/122178354704?hash=item1c7265be10:g:xx4AAOSwm7pZ2Kb-

NRF52832-DK is kind of way over budget :D

Omemanti

@gohan sure, I bought some of those. Works great. One crashed so now I bought a couple, just to be sure.. :)

Nca78

@nca78 said in nRF5 Bluetooth action!:

So I tried your code with a more recent version of the chip and I have a power consumption around 1mA.
This is not surprising because in fact issue 39 seems to not be completely fixed, if I believe this link:
https://devzone.nordicsemi.com/f/nordic-q-a/577/current-consumption-when-using-rtc-ppi-and-gpiote#post-id-18533

"The third revision hardware of the nRF51 has a solution for the GPIOTE OUT tasks, which has very low current consumption (<1uA). The third revision nRF51 hardware will be released in a few days. The third revision hardware still does not have a solution for the GPIOTE IN events, they still consume high current, so for low current applications, use the GPIOTE PORT event instead or the app_button libary."

From what I see it was never fixed.

Took time but after failure trying to make a version by myself I decided to include app_gpiote library from SDK in my script and it works, it's using around 1uA more than LPCOMP (I measure 5.5 uA with my multimeter) but it can use any pin and in theory any number of pins without increasing power consumption.
The behavior is similar to pin change interrupt on ATMega328, you have one interrupt for all the pins you are watching, so you have to check which pin generated the interrupt but app_gpiote is preparing the work for you.
I have this consumption with a similar script than @Neverdie for LPCOMP: using MySensors with MY_CORE_ONLY, preparing the interrupt then calling the sleep(ms) function from MySensors library, and it works as expected changing status of led immediately when I change status of pin, and waking up at the end of the interval if I don't.
I'll do more tests tomorrow including a full MySensors script, and post the info here. It needs a bunch of files from SDK and adding a (weak) attribute to GPIOTE_IRQHandler() in sandeepmistry's code so it can be overridden in the script.

Yveaux

@omemanti said in nRF5 Bluetooth action!:

I bought some of those. Works great

Do you use them with windows?
I tried to get them to program an nrf52832, but openocd in Arduino ide under windows doesn't detect them...
Both stlinks work in Linux.

nRF5 action!

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