boards: ikea-tradfri: add support #8047

basilfx · 2017-11-15T23:30:16Z

Last week I found out that the IKEA TRÅDFRI lighting products and accessories use the Silicon Labs EZR32MG1P microcontroller. Let it be a coincidence that the Thunderboard Sense (#7929) which was merged this week, uses the same CPU!

Now if we look into their line of products, it happens that they use the same CPU module in all(?) of their products: here, here and here. Nonetheless, you can isolate them from the product, and use them for your own ideas, or leave them in and flash a custom firmware.

The MCU is a ARM Cortex M4 with 256 kB of flash. It's quite packed (including hardware crypto), flexible pin mapping and has an integrated radio which supports Thread, ZigBee Light Link and more.

It won't surprise me if people buy the cheapest light available (the GU-10 I used costed me 6,99 euro) and upgrade, hack or repurpose them. Let RIOT-OS be one of the first to support them :-)

This PR is a quick port to this new platform. I have more information on the module over here and a demonstration video here. For flashing you need to connect a JTAG/SWD compatible debugger, but I can flash it the exact same way as the Thunderboard Sense when I use SEGGER JLink. You do not even have to remove the module.

basilfx · 2017-11-15T23:35:31Z

This will void the warranty of your IKEA product.

miri64 · 2017-11-15T23:36:12Z

Is there a radio on-board (and do we support it already)?

basilfx · 2017-11-15T23:38:03Z

It has a radio on-board, but we don't support it yet. But now I have more motivation to do so :-)

It would be a nice product/board for demo purposes.

miri64 · 2017-11-15T23:39:16Z

It would be a nice product/board for demo purposes.

Yes definitely! I've been waiting for hacks like this basically since day one of my contribution (but never found the time to do it myself 😞).

kYc0o · 2017-11-15T23:39:29Z

Eeeexcelleeeent!!! I was thinking about these products since I was aware of them, but I'm glad you also investigated them!

I'll try to grab some and hack them with RIOT.

miri64 · 2017-11-15T23:44:49Z

I guess I have to guess I have to go to IKEA again (damn it I was saving up for a new PC!!1! 😜)

haukepetersen · 2017-11-16T13:04:03Z

Awesome!!! My wife will be sooo happy that I am now motivated to go to ikea (besides the usual hot-dog motivation) :-)

Will review do a review right away.

haukepetersen · 2017-11-16T13:06:04Z

boards/ikea-tradfri/include/board.h

+ * @{
+ */
+#define LED0_PIN            GPIO_PIN(PA, 1)
+#define LED1_PIN            GPIO_PIN(PB, 13)


From your video I take that this pin is connected to the FET switching the actual light, right? So what is LED0 connected to?

I have to think about this, and see what is useful. In my case, PA1 was also soldered, but I don't know what it does (haven't traced it properly).

Since the same board is used in different light bulbs or accessories, I had this idea of defining different pins on an additional compiler flag. E.g. IKEA_PRODUCT=ligthbulb or something like that.

I see. So I guess lets leave it for now and see what further reverse engineering brings...

After closer inspection, it seems that PA1 is only connected for fixing the PCB. It leads to a dead end (missing resistor).

Maybe it's connected in the more expensive versions? The versions that can change the white color between warm and cold (not only brightness) have 2 different LED-types for this - cold whites and warm whites. So there's probably one color on each connector?

That is definitely possible. In other teardowns you can see that more pins are connected.

haukepetersen

One tiny remark, else looking great!

haukepetersen · 2017-11-16T13:07:09Z

boards/ikea-tradfri/include/periph_conf.h

+        .dev = USART1,
+        .mosi_pin = GPIO_PIN(PD, 15),
+        .miso_pin = GPIO_PIN(PD, 14),
+        .clk_pin = GPIO_PIN(PD, 13),


Is there anything connected to these pins (or rather: are they accessible)? If not, we might just want to skip the SPI configuration all together for this board?!

There is an additional SPI flash that we might want to access.

Alright, so never mind.

I'm not 100% sure, but based on reading the JEDEC ID and Product Identification, it seems that a 2Mbit flash by Integrated Silicon Solution Inc. (part number IS25LQ020B) is used.

kaibeckmann · 2017-11-17T09:14:28Z

Hey thats cool!

Based on your work I started with the radio driver and support for the Silicon Labs Dev-boards. It is still work in progress and based on the RIOT version from February, but could be a starting point to get RIOT on light bulbs :)

basilfx · 2017-11-17T09:35:05Z

@kaibeckmann That's cool! I can help you if you want!

I am also working on another PR which will improve support for EFM32, based on feedback by @haukepetersen. Hope to create a PR this weekend.

In the mean time, I have updated https://github.com/basilfx/TRADFRI-Hacking and added some work-in-progress schematics and PCB designs for development. I first need another trip to IKEA!

kaibeckmann · 2017-11-17T09:48:36Z

@basilfx Yeah that could speed things up!
Regarding the EFM32 support: I ran in some issues with the radio stuff there. I'll try to sum it up and send you a mail. Furthermore, I started to put the gecko-sdk in an package. At the moment I only pull the radio driver blob from it and use the header files for the RAIL-API. Maybe that could be a used for the rest of the emlib-stuff as well?

haukepetersen

My concerns are addressed -> ACK ACK ACK

haukepetersen · 2017-11-17T11:01:07Z

@kaspar030 I know you won't like the duplicated code in this PR either, but I'd say we merge this anyway and wait for the results of #8058 and clean-up/unify around the EFM32-based boards once a structure is decided.

kYc0o · 2017-11-17T17:22:49Z

@basilfx is there a way to backup the existing firmware? (in case of we want to come back to the default behaviour).

kYc0o · 2017-11-17T17:26:56Z

Just FYI, there are efforts to communicate with these things using aiocoap, you might be interested in this issue.

basilfx · 2017-11-17T17:27:02Z

@kYc0o Yes, I've managed to backup a copy of the firmware. I haven't tried to flash it back, but I will try that tonight (just went to IKEA to buy some more lights).

kYc0o · 2017-11-17T17:35:42Z

There is this effort too.

basilfx · 2017-11-17T19:54:01Z

I can confirm that the light will still work after downloading the binary (256 kB), erasing the chip, and then uploading the binary again (including power cycling). I did have to re-pair the light bulb, but I think that is not due to flashing. It even defaulted to last brightness.

miri64 · 2017-11-17T22:31:32Z

Nobody dares to merge this awesome feature?

basilfx · 2017-11-17T22:51:17Z

I have a small fix for the SPI pins. I have confirmed that it works, because I can read the SPI chip.

kYc0o · 2017-11-17T23:28:58Z

Nobody dares to merge this awesome feature?

It was maybe acked too fast 😉

basilfx · 2017-11-17T23:46:54Z

Now also featured on Hackaday: https://hackaday.com/2017/11/17/hacking-the-ikea-tradfri-light-bulb/

kYc0o · 2017-11-17T23:49:31Z

Waaaaao!!! Congrats! 😃

miri64 · 2017-11-18T10:50:32Z

Whoopwhoop \o/

miri64 · 2017-11-18T10:51:46Z

Nobody dares to merge this awesome feature?

It was maybe acked too fast 😉

Can you point me to the comment where this is stated? I couldn't find it. (and why wasn't the review dismissed then 😉?)

basilfx · 2017-11-18T15:57:14Z

If somebody wants to re-ACK my last commit (d710676), than I will squash, rebase and commit when Murdock agrees!

kYc0o · 2017-11-19T17:18:53Z

Can you point me to the comment where this is stated? I couldn't find it. (and why wasn't the review dismissed then 😉?)

I didn't mean too fast in the sense of "bad-acked" but in the sense that several changes came just after it was acked which can also belong to this PR. We could have merged this as it was acked (since it was OK to ack it, everything worked as expected and the comments were addressed), and the modifications and improvements which came afterwards would have been part of another PR.

Thus, nothing to dismiss, nothing to complain, just a personal impression. Waiting a bit more before merge it gave us other features and better understanding.

kYc0o · 2017-11-20T01:49:21Z

cpu/efr32mg1p/ldscripts/efr32mg1p132f256gm32.ld

+MEMORY
+{
+    rom (rx)    : ORIGIN = 0x00000000, LENGTH = 262144
+    ram (rwx)   : ORIGIN = 0x20000000, LENGTH = 31744


What happened with the remaining 1K of RAM?

If I recall correctly, 1 KiB is reserved for the (proprietary) radio (driver). However, I've double-checked with the Gecko SDK, but that number is correct :-)

Ok. I suppose that is managed internally since I don't see any specific instruction in the ld you cite on which they make use of the last 1K of RAM. Though it looks a bit strange but if it works let's continue this way.

jnohlgard · 2017-11-20T12:19:49Z

cpu/efr32mg1p/ldscripts/efr32mg1p132f256gm32.ld

+
+MEMORY
+{
+    rom (rx)    : ORIGIN = 0x00000000, LENGTH = 262144


262144 can be written as 256K to make it a little bit more friendly

I can change that, but I have another PR coming up that will use the default Cortex-M linker scripts :-)

haukepetersen · 2017-11-20T16:18:17Z

re-ACK your SPI fix -> please squash and I will be happy to press the big green button :-)

basilfx · 2017-11-21T09:29:52Z

@haukepetersen Go ahead :-)

haukepetersen · 2017-11-21T10:17:07Z

My pleasure! -> go

miri64 · 2017-11-21T10:17:34Z

🎉

basilfx added Area: boards Area: Board ports Type: new feature The issue requests / The PR implemements a new feature for RIOT labels Nov 15, 2017

basilfx assigned haukepetersen Nov 15, 2017

kYc0o assigned kYc0o and haukepetersen and unassigned haukepetersen Nov 15, 2017

haukepetersen reviewed Nov 16, 2017

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haukepetersen requested changes Nov 16, 2017

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miri64 added the PR-award-nominee Deprecated. Will be removed soon. label Nov 16, 2017

haukepetersen approved these changes Nov 17, 2017

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basilfx added the CI: ready for build If set, CI server will compile all applications for all available boards for the labeled PR label Nov 17, 2017

basilfx force-pushed the feature/ikea-tradfri branch from ec2bba9 to d710676 Compare November 17, 2017 22:52

basilfx added the CI: needs squashing Commits in this PR need to be squashed; If set, CI systems will mark this PR as unmergable label Nov 18, 2017

kYc0o reviewed Nov 20, 2017

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jnohlgard reviewed Nov 20, 2017

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basilfx added 2 commits November 20, 2017 17:38

cpu: efm32mg1p: add support for the efr32mg1p132f256gm32.

db21450

boards: ikea-tradfri: add support for board.

c51948c

basilfx force-pushed the feature/ikea-tradfri branch from d710676 to c51948c Compare November 20, 2017 16:38

kaspar030 mentioned this pull request Nov 21, 2017

boards: move shared code to boards/common/xx #8058

Merged

haukepetersen merged commit e5083ab into RIOT-OS:master Nov 21, 2017

aabadie added this to the Release 2018.01 milestone Jan 18, 2018

basilfx mentioned this pull request Mar 16, 2018

boards: efm32: adapt pr feedback for other boards #8794

Merged

basilfx deleted the feature/ikea-tradfri branch January 9, 2020 20:42

boards: ikea-tradfri: add support #8047

boards: ikea-tradfri: add support #8047

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basilfx commented Nov 15, 2017 • edited

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