10 ms·

C-Sky: A $6 Linux dev board with HDMI and USB

178 points by zoobab 8y ago

jononor 8y ago
C-Sky is a RISC-V member, is this a RISC-V board?
- GrayShade 8y ago
  No: https://www.phoronix.com/scan.php?page=news_item&px=C-SKY-Approved-Last-Arch https://www.phoronix.com/scan.php?page=news_item&px=C-SKY-Ap...
  - geokon 8y ago
    "I think this may well be the last new CPU architecture we ever add to the kernel. Both nds32 and c-sky are made by companies that also work on risc-v, and generally speaking risc-v seems to be killing off any of the minor licensable instruction set projects.." -- long-time low-level kernel developer Arnd Bergmann Wow.. that's quite the statement. Would be interesting to know more about this ISA and if it's doing anything interesting and new
    - AnssiH 8y ago
      > It was pointed out within minutes of my comment that there is another platform getting ready for merging (Kalray MPPA), so my prediction was clearly wrong. https://lwn.net/Articles/770410/ https://lwn.net/Articles/770410/
- deleted 8y ago
  [deleted]
rahimnathwani 8y ago
It costs 39 CNY plus 9 CNY for domestic China shipping (total just under 7 USD): http://m.zrumg.top/h.3PwbrnB?sm=9f6f7c http://m.zrumg.top/h.3PwbrnB?sm=9f6f7c
- leemailll 8y ago
  why not this: https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w4004-18365545946.2.27e337f32mS9mV&id=556322544984 https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w4004-18365...
  - rahimnathwani 8y ago
    It's the same Taobao listing. The link I pasted was from the 'share' feature in the Taobao app. I think they use these obfuscated domains so that the pages don't get blocked from opening when opened from a social media share. WeChat for example won't open Taobao links in the internal browser. EDIT if I 'share' and choose 'SMS' as the destination, the Taobao app puts a regular link in the clipboard: https://taobao.com/awp/core/detail.htm?id=556322544984 https://taobao.com/awp/core/detail.htm?id=556322544984
robert_foss 8y ago
These are based on the Nationalchip GX6605S SOC, which has no mainline support, but C-Sky maintains a kernel supporting it[1]. It also seems to have buildroot support if you want to whip up an embedded platform based on it[2]. [1] https://github.com/c-sky/linux-4.9.y/ https://github.com/c-sky/linux-4.9.y/ [2] https://patchwork.ozlabs.org/patch/734596/ https://patchwork.ozlabs.org/patch/734596/
- int0x80 8y ago
  c-sky arch has been merged into mainline: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/csky?id=c32e64e852f3f5c0fd709f84bc94736840088375 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...
  - robert_foss 8y ago
    Neat! I wonder how far out SOC support is though. Arch support is the very first step in terms of supporting an SOC.
    - int0x80 8y ago
      I'm seeing core code (kernel, cpu, mmu, irq etc) in arch/ and a few clocksource and timer drivers. No clue about the HDMI or USB controllers for example, or even if the are using other already merged drivers for them.
- TeMPOraL 8y ago
  How is it that all those cheap boards are always based on chips without proper support?
  - StavrosK 8y ago
    Maybe that's why they're cheap.
    - TeMPOraL 8y ago
haddr 8y ago
Forgive my black humour, but I hope there is no extra spying chip there
- Freak_NL 8y ago
  For €5 an extra spying chip thrown in for free is a steal though.
  - saagarjha 8y ago
    Depending on whether you have control of the spying chip.
- nurettin 8y ago
  would be interested in a spying chip that works without networking, as this device has none.
angelsl 8y ago
FWIW, C-SKY architectural support was recently pulled: http://lkml.iu.edu/hypermail/linux/kernel/1810.3/03389.html http://lkml.iu.edu/hypermail/linux/kernel/1810.3/03389.html
- mirashii 8y ago
  Pulled in this context means pulled into the tree, not removed as the common parlance might indicate, for those who were a bit confused like myself.
  - klez 8y ago
    Wouldn't the correct (or, at least, less confusing) term then be "merged" if that's the case?
    - sokoloff 8y ago
      "pull" is a git command to merge and update https://git-scm.com/docs/git-pull https://git-scm.com/docs/git-pull
    - gnulinux 8y ago
      Pull is also correct. Somehow merge is a little more popular but pull is certainly correct too. Remember the word "Pull Request".
  - angelsl 8y ago
    My bad, should've said merged. I wrote the comment immediately after reading Linus's email.
xaduha 8y ago
Is price a really big deal for these? Do you buy them in bulk for something?
- NullPrefix 8y ago
  Is the price for anything a big deal?
  - xaduha 8y ago
    It depends, that's why I'm asking. There isn't much difference between 6 or 12 or 24 to me for something you buy one of, especially if $24 gets you something much better (e.g. I'd rather buy Orange PI that supports Android). But even +$1 can be a big deal if you want to buy thousands of them.
c0deR3D 8y ago
Why using XX32F103C8T6 instead of its complete model at specification of UART?
- jack12 8y ago
  Probably because they don't care if it's made by STMicroelectronics or by GigaDevice. Most likely it is made by GigaDevice, but maybe they thought calling it a GD32F103C8T6 would be meaningless to many people and calling it an STM32F103 would be dishonest and so this was a compromise. Or maybe they found a third source that would have an even less recognized name. How did things work back in the day of (official) second-sourcing? Did you just refer to a MC68000 even if you meant generically any of MC68000/HD68000/MK68000/etc? I guess it helped that it had such a unique model number and any of them could just be referred to as a 68000. I guess calling this a 32F103 would be the equivalent in this case.
megous 8y ago
What's the power consumption like? I don't see many potential benefits other than that, compared to similarly priced Allwinner based SBCs which are more powerful and better supported currently. Also for a dev board, there's not much GPIO/other interfaces like I2C or SPI.
- tyingq 8y ago
  It does say this: "The 5V1A is powered by JTAG and UART micro-usb, so no additional power interface is required" A fair amount of monitors and TVs have a USB port, so it would make a decent digital signage solution. Assuming you want your content just as files on a thumb drive.
snarfy 8y ago
No networking it looks like. Whenever I see these dev boards (and I have dozens), I'm always tempted to just use a cell phone. Does your project need networking? A battery? A display? Bluetooth? Try cobbling together an arduino like solution and you'll spend > $50. You can buy a smartphone with wifi and touchscreen running android for $10.
- IloveHN84 8y ago
  Not everyone is looking for network, so it's perfectly fine. Plus, how would you use a phone which has restrictions from OEM?
- dorfsmay 8y ago
  10$ new or used? With easy to change batteries?
  - snarfy 8y ago
    No idea if I can change the batteries, but for $10 don't really care. https://www.amazon.com/Net10-Alcatel-Star-Prepaid-Smartphone/dp/B07FK6KDQF https://www.amazon.com/Net10-Alcatel-Star-Prepaid-Smartphone...
    - dorfsmay 8y ago
      "prepaid"? So this is locked (it would explain the price, subventioned by the provider.)?
      - snarfy 8y ago
        I don't plan on making phone calls with it. It will still work as a wifi device
- avar 8y ago
  Where can you buy a smartphone with wifi and a touchscreen for $10? If the answer is "used", then I could also buy something like this $6 board used for $0.06 in a few years, so that doesn't count.
emilfihlman 8y ago
Just give me a board with gigabit ethernet, wifi+bt, emmc (NOT sd for fucks sake), like 2-4 usb As and a proper power connector (NOT the god damn micro usb) and I'm happy!
- znpy 8y ago
  Yeah, that's going to close you way more than 7$ I'd be happy if the raspberry pi had full gigabit ethernet.
- doughj3 8y ago
  An Orange Pi Plus 2E meets all your needs, but like the other comment noted, it's going to cost more than $6. http://www.orangepi.org/orangepiplus2e/ http://www.orangepi.org/orangepiplus2e/
  - NullPrefix 8y ago
    Mainline kernel support would be nice too.
goph0 8y ago
Only 64MB of RAM? In 2013 I bought https://en.wikipedia.org/wiki/CHIP_(computer) https://en.wikipedia.org/wiki/CHIP_(computer) for 10E including shipping. ARM Cortex-A8, WiFi, bluetooth, GPIO, i2c, 4GB NAND drive, 512 MB of RAM Serious question: given that the hardware is open, why is nobody replicating the same thing at a similar price?
- tango24 8y ago
  2013? That wiki link says the release date was 2016, but the company "had entered insolvency. Many customers still had not received their pre-orders". Sounds like it wasn't profitable to create such cheap devices?
- OpenBSD-reich 8y ago
  I love my PocketCHIP. Perfect form factor. Get one or two on eBay before they become rare! I want to try installing OpenBSD on mine sometime soon.
dazhbog 8y ago
Interesting that they put a full blown XX32F103 there for jtag and still use a CH340 for serial. They could easily use the F103 for both, to bring the cost down (save on USB conn, 12mhz crystal, serial IC, etc). That's savings of 0.30 USD right there.
- sitkack 8y ago
  They probably reused jtag and serial from different projects, which makes sense for a V1. If it is popular, I am sure they would implement the changes you list.
yitchelle 8y ago
Serious question. Given the recent story [0] about spying, how much trust would put on something as obscure as this implementation of a single board computer? The lack of trust is not yet mitigated with wide adoption by communities outside of China. [0] - https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how-china-used-a-tiny-chip-to-infiltrate-america-s-top-companies https://www.bloomberg.com/news/features/2018-10-04/the-big-h...
- algorithm314 8y ago
  US also spies but in other ways. For example intel ME.
  - reaperducer 8y ago
    You didn’t answer the question. All you did is try to misdirect the discussion. I think he has a valid question. I’m in the market for a replacement for my Onion Omega2’s, so I clicked the link. The fact that the product page is exclusively in Chinese does not make me confident. Western bias? Maybe. But that doesn’t mean the concern isn’t valid. I’d worry if it was in Russian, too.
    - discoball 8y ago
      Touchy subject.
    - roymurdock 8y ago
      i think your concern should be relative to your value as a target of a hack. there's a reason billionaires have private bodyguards and we don't, and there's a reason high value systems are built from scratch in tightly controlled environments and use things like hardware based security
      - reaperducer 8y ago
        Any hacker knows that you go after the low value targets to get to the high value targets. You hack the CEO’s secretary to get the CEO’a records. You hack the defense contractor to get to the defense agency. The concept of a “low value” target is outdated, which is why there’s such concern about commodity IoT devices.
aidenn0 8y ago
There are a lot of cheap linux dev boards out there now, to the point where I had trouble finding a list of boards that met my requirements[1]. There is almost certainly a sub-$20 board out there with what I need, but I ended up using an RPi just because it was "cheap enough" and had what I needed. 1: In this case, analog audio out, 1 host-side USB port, and 6 GPIOs.
- mrsteveman1 8y ago
  The Pi Zero W is my default for the same reason, and most of mine were all of $5 due to sales at Microcenter. It's pretty hard to beat that unless you need more CPU power. Add an industrial MicroSD card for ~$15 (to prevent the infamous SD corruption) and it's still at the $20 point but far more reliable and versatile than many of the alternatives. Even some of my microcontroller boards cost more than that, and you can still program the Pi boards "bare metal" if you really want to, because they're popular enough that people have already done the work to make that possible. P.S., even with a Pi Zero (W or not), you can hook up a tiny I2S audio codec board for a line level[1] or amplified[2] audio output. [1] https://www.adafruit.com/product/3678 https://www.adafruit.com/product/3678 [2] https://www.adafruit.com/product/3006 https://www.adafruit.com/product/3006
  - aidenn0 8y ago
    Thanks, I didn't know the Pi Zero had I2S pins brought out; kind of funny that the unamplified board is more expensive (though just from the picture it's easy to see why; the amplified board is relying on the inductance of the load for filtering and it lacks the phone jack).
guoren 8y ago
newest gx6605s dev feeds: https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifacts/browse/output/images/ https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifact... make from buildroot: git clone https://gitlab.com/c-sky/buildroot.git https://gitlab.com/c-sky/buildroot.git cd buildroot make csky_gx6605s_br_defconfig make USB host controller is OHCI+EHCI in kernel drivers. HDMI is a very simple framebuffer driver in https://github.com/c-sky/addons-linux/tree/master/addons/drivers/video/fbdev/nationalchip https://github.com/c-sky/addons-linux/tree/master/addons/dri...
guoren 8y ago
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/?h=v4.20-rc2 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin... This kernel also could work with gx6605s, you can ref: https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifacts/browse/output/images/ https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifact... dts and kernel-config
zoobab 8y ago
There is also an article on CNX: https://www.cnx-software.com/2018/11/12/c-sky-linux-development-board-gx6605s-media-soc/ https://www.cnx-software.com/2018/11/12/c-sky-linux-developm...

178 points by zoobab 8y ago

jononor 8y ago

C-Sky is a RISC-V member, is this a RISC-V board?

GrayShade 8y ago
No: https://www.phoronix.com/scan.php?page=news_item&px=C-SKY-Approved-Last-Arch https://www.phoronix.com/scan.php?page=news_item&px=C-SKY-Ap...
- geokon 8y ago
  "I think this may well be the last new CPU architecture we ever add to the kernel. Both nds32 and c-sky are made by companies that also work on risc-v, and generally speaking risc-v seems to be killing off any of the minor licensable instruction set projects.." -- long-time low-level kernel developer Arnd Bergmann Wow.. that's quite the statement. Would be interesting to know more about this ISA and if it's doing anything interesting and new
  - AnssiH 8y ago
    > It was pointed out within minutes of my comment that there is another platform getting ready for merging (Kalray MPPA), so my prediction was clearly wrong. https://lwn.net/Articles/770410/ https://lwn.net/Articles/770410/
deleted 8y ago
[deleted]

rahimnathwani 8y ago

It costs 39 CNY plus 9 CNY for domestic China shipping (total just under 7 USD): http://m.zrumg.top/h.3PwbrnB?sm=9f6f7c http://m.zrumg.top/h.3PwbrnB?sm=9f6f7c

leemailll 8y ago
why not this: https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w4004-18365545946.2.27e337f32mS9mV&id=556322544984 https://item.taobao.com/item.htm?spm=a1z10.1-c-s.w4004-18365...
- rahimnathwani 8y ago
  It's the same Taobao listing. The link I pasted was from the 'share' feature in the Taobao app. I think they use these obfuscated domains so that the pages don't get blocked from opening when opened from a social media share. WeChat for example won't open Taobao links in the internal browser. EDIT if I 'share' and choose 'SMS' as the destination, the Taobao app puts a regular link in the clipboard: https://taobao.com/awp/core/detail.htm?id=556322544984 https://taobao.com/awp/core/detail.htm?id=556322544984

robert_foss 8y ago

These are based on the Nationalchip GX6605S SOC, which has no mainline support, but C-Sky maintains a kernel supporting it[1]. It also seems to have buildroot support if you want to whip up an embedded platform based on it[2]. [1] https://github.com/c-sky/linux-4.9.y/ https://github.com/c-sky/linux-4.9.y/ [2] https://patchwork.ozlabs.org/patch/734596/ https://patchwork.ozlabs.org/patch/734596/

int0x80 8y ago
c-sky arch has been merged into mainline: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch/csky?id=c32e64e852f3f5c0fd709f84bc94736840088375 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin...
- robert_foss 8y ago
  Neat! I wonder how far out SOC support is though. Arch support is the very first step in terms of supporting an SOC.
  - int0x80 8y ago
    I'm seeing core code (kernel, cpu, mmu, irq etc) in arch/ and a few clocksource and timer drivers. No clue about the HDMI or USB controllers for example, or even if the are using other already merged drivers for them.
TeMPOraL 8y ago
How is it that all those cheap boards are always based on chips without proper support?
- StavrosK 8y ago
  Maybe that's why they're cheap.
  - TeMPOraL 8y ago

haddr 8y ago

Forgive my black humour, but I hope there is no extra spying chip there

Freak_NL 8y ago
For €5 an extra spying chip thrown in for free is a steal though.
- saagarjha 8y ago
  Depending on whether you have control of the spying chip.
nurettin 8y ago
would be interested in a spying chip that works without networking, as this device has none.

angelsl 8y ago

FWIW, C-SKY architectural support was recently pulled: http://lkml.iu.edu/hypermail/linux/kernel/1810.3/03389.html http://lkml.iu.edu/hypermail/linux/kernel/1810.3/03389.html

mirashii 8y ago
Pulled in this context means pulled into the tree, not removed as the common parlance might indicate, for those who were a bit confused like myself.
- klez 8y ago
  Wouldn't the correct (or, at least, less confusing) term then be "merged" if that's the case?
  - sokoloff 8y ago
    "pull" is a git command to merge and update https://git-scm.com/docs/git-pull https://git-scm.com/docs/git-pull
  - gnulinux 8y ago
    Pull is also correct. Somehow merge is a little more popular but pull is certainly correct too. Remember the word "Pull Request".
- angelsl 8y ago
  My bad, should've said merged. I wrote the comment immediately after reading Linus's email.

xaduha 8y ago

Is price a really big deal for these? Do you buy them in bulk for something?

NullPrefix 8y ago
Is the price for anything a big deal?
- xaduha 8y ago
  It depends, that's why I'm asking. There isn't much difference between 6 or 12 or 24 to me for something you buy one of, especially if $24 gets you something much better (e.g. I'd rather buy Orange PI that supports Android). But even +$1 can be a big deal if you want to buy thousands of them.

c0deR3D 8y ago

Why using XX32F103C8T6 instead of its complete model at specification of UART?

jack12 8y ago
Probably because they don't care if it's made by STMicroelectronics or by GigaDevice. Most likely it is made by GigaDevice, but maybe they thought calling it a GD32F103C8T6 would be meaningless to many people and calling it an STM32F103 would be dishonest and so this was a compromise. Or maybe they found a third source that would have an even less recognized name. How did things work back in the day of (official) second-sourcing? Did you just refer to a MC68000 even if you meant generically any of MC68000/HD68000/MK68000/etc? I guess it helped that it had such a unique model number and any of them could just be referred to as a 68000. I guess calling this a 32F103 would be the equivalent in this case.

megous 8y ago

What's the power consumption like? I don't see many potential benefits other than that, compared to similarly priced Allwinner based SBCs which are more powerful and better supported currently. Also for a dev board, there's not much GPIO/other interfaces like I2C or SPI.

tyingq 8y ago
It does say this: "The 5V1A is powered by JTAG and UART micro-usb, so no additional power interface is required" A fair amount of monitors and TVs have a USB port, so it would make a decent digital signage solution. Assuming you want your content just as files on a thumb drive.

snarfy 8y ago

No networking it looks like. Whenever I see these dev boards (and I have dozens), I'm always tempted to just use a cell phone. Does your project need networking? A battery? A display? Bluetooth? Try cobbling together an arduino like solution and you'll spend > $50. You can buy a smartphone with wifi and touchscreen running android for $10.

IloveHN84 8y ago
Not everyone is looking for network, so it's perfectly fine. Plus, how would you use a phone which has restrictions from OEM?
dorfsmay 8y ago
10$ new or used? With easy to change batteries?
- snarfy 8y ago
  No idea if I can change the batteries, but for $10 don't really care. https://www.amazon.com/Net10-Alcatel-Star-Prepaid-Smartphone/dp/B07FK6KDQF https://www.amazon.com/Net10-Alcatel-Star-Prepaid-Smartphone...
  - dorfsmay 8y ago
    "prepaid"? So this is locked (it would explain the price, subventioned by the provider.)?
    - snarfy 8y ago
      I don't plan on making phone calls with it. It will still work as a wifi device
avar 8y ago
Where can you buy a smartphone with wifi and a touchscreen for $10? If the answer is "used", then I could also buy something like this $6 board used for $0.06 in a few years, so that doesn't count.

emilfihlman 8y ago

Just give me a board with gigabit ethernet, wifi+bt, emmc (NOT sd for fucks sake), like 2-4 usb As and a proper power connector (NOT the god damn micro usb) and I'm happy!

znpy 8y ago
Yeah, that's going to close you way more than 7$ I'd be happy if the raspberry pi had full gigabit ethernet.
doughj3 8y ago
An Orange Pi Plus 2E meets all your needs, but like the other comment noted, it's going to cost more than $6. http://www.orangepi.org/orangepiplus2e/ http://www.orangepi.org/orangepiplus2e/
- NullPrefix 8y ago
  Mainline kernel support would be nice too.

goph0 8y ago

Only 64MB of RAM? In 2013 I bought https://en.wikipedia.org/wiki/CHIP_(computer) https://en.wikipedia.org/wiki/CHIP_(computer) for 10E including shipping. ARM Cortex-A8, WiFi, bluetooth, GPIO, i2c, 4GB NAND drive, 512 MB of RAM Serious question: given that the hardware is open, why is nobody replicating the same thing at a similar price?

tango24 8y ago
2013? That wiki link says the release date was 2016, but the company "had entered insolvency. Many customers still had not received their pre-orders". Sounds like it wasn't profitable to create such cheap devices?
OpenBSD-reich 8y ago
I love my PocketCHIP. Perfect form factor. Get one or two on eBay before they become rare! I want to try installing OpenBSD on mine sometime soon.

dazhbog 8y ago

Interesting that they put a full blown XX32F103 there for jtag and still use a CH340 for serial. They could easily use the F103 for both, to bring the cost down (save on USB conn, 12mhz crystal, serial IC, etc). That's savings of 0.30 USD right there.

sitkack 8y ago
They probably reused jtag and serial from different projects, which makes sense for a V1. If it is popular, I am sure they would implement the changes you list.

yitchelle 8y ago

Serious question. Given the recent story [0] about spying, how much trust would put on something as obscure as this implementation of a single board computer? The lack of trust is not yet mitigated with wide adoption by communities outside of China. [0] - https://www.bloomberg.com/news/features/2018-10-04/the-big-hack-how-china-used-a-tiny-chip-to-infiltrate-america-s-top-companies https://www.bloomberg.com/news/features/2018-10-04/the-big-h...

algorithm314 8y ago
US also spies but in other ways. For example intel ME.
- reaperducer 8y ago
  You didn’t answer the question. All you did is try to misdirect the discussion. I think he has a valid question. I’m in the market for a replacement for my Onion Omega2’s, so I clicked the link. The fact that the product page is exclusively in Chinese does not make me confident. Western bias? Maybe. But that doesn’t mean the concern isn’t valid. I’d worry if it was in Russian, too.
  - discoball 8y ago
    Touchy subject.
  - roymurdock 8y ago
    i think your concern should be relative to your value as a target of a hack. there's a reason billionaires have private bodyguards and we don't, and there's a reason high value systems are built from scratch in tightly controlled environments and use things like hardware based security
    - reaperducer 8y ago
      Any hacker knows that you go after the low value targets to get to the high value targets. You hack the CEO’s secretary to get the CEO’a records. You hack the defense contractor to get to the defense agency. The concept of a “low value” target is outdated, which is why there’s such concern about commodity IoT devices.

aidenn0 8y ago

There are a lot of cheap linux dev boards out there now, to the point where I had trouble finding a list of boards that met my requirements[1]. There is almost certainly a sub-$20 board out there with what I need, but I ended up using an RPi just because it was "cheap enough" and had what I needed. 1: In this case, analog audio out, 1 host-side USB port, and 6 GPIOs.

mrsteveman1 8y ago
The Pi Zero W is my default for the same reason, and most of mine were all of $5 due to sales at Microcenter. It's pretty hard to beat that unless you need more CPU power. Add an industrial MicroSD card for ~$15 (to prevent the infamous SD corruption) and it's still at the $20 point but far more reliable and versatile than many of the alternatives. Even some of my microcontroller boards cost more than that, and you can still program the Pi boards "bare metal" if you really want to, because they're popular enough that people have already done the work to make that possible. P.S., even with a Pi Zero (W or not), you can hook up a tiny I2S audio codec board for a line level[1] or amplified[2] audio output. [1] https://www.adafruit.com/product/3678 https://www.adafruit.com/product/3678 [2] https://www.adafruit.com/product/3006 https://www.adafruit.com/product/3006
- aidenn0 8y ago
  Thanks, I didn't know the Pi Zero had I2S pins brought out; kind of funny that the unamplified board is more expensive (though just from the picture it's easy to see why; the amplified board is relying on the inductance of the load for filtering and it lacks the phone jack).

guoren 8y ago

newest gx6605s dev feeds: https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifacts/browse/output/images/ https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifact... make from buildroot: git clone https://gitlab.com/c-sky/buildroot.git https://gitlab.com/c-sky/buildroot.git cd buildroot make csky_gx6605s_br_defconfig make USB host controller is OHCI+EHCI in kernel drivers. HDMI is a very simple framebuffer driver in https://github.com/c-sky/addons-linux/tree/master/addons/drivers/video/fbdev/nationalchip https://github.com/c-sky/addons-linux/tree/master/addons/dri...

guoren 8y ago

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/?h=v4.20-rc2 https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/lin... This kernel also could work with gx6605s, you can ref: https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifacts/browse/output/images/ https://gitlab.com/c-sky/buildroot/-/jobs/113874636/artifact... dts and kernel-config

zoobab 8y ago

There is also an article on CNX: https://www.cnx-software.com/2018/11/12/c-sky-linux-development-board-gx6605s-media-soc/ https://www.cnx-software.com/2018/11/12/c-sky-linux-developm...