Seeed Arch Max

Limited support for STM32F4 Discovery, Nucleo and custom F4 boards
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ddrown
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Seeed Arch Max

Post by ddrown » Wed Jun 08, 2016 1:54 am

I got it in the mail today.
IMG_20160607_201140.jpg
IMG_20160607_201140.jpg (131.98 KiB) Viewed 927 times
The bottom left USB port supplies power and has the mbed interface - serial + disk + openocd/swd debug (not stlink!). Looks like the debug/serial chip is actually based on a NXP part. I needed to install this Windows driver to get serial to work: https://developer.mbed.org/handbook/Win ... figuration Default serial baud (for mbed) is 9600. The NXP is connected to uart6 (PC6/PC7).

LED1 (PB3, green) is on the top near the ethernet isolation transformers. Blinky sketch works, but the time's slow by around 15x. I assume the HSE for this board is different than the stm32f4 discovery board.

The LEDs on the bottom left are:
Red - programming "MSD"
Blue - "HID" (openocd activity?)
Orange - RX/TX uart activity
Green - power

The SW1 button next to the LEDs connects to the NXP's reset, and is used to update the NXP's firmware.

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ddrown
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Re: Seeed Arch Max

Post by ddrown » Wed Jun 08, 2016 2:12 am

... And the ethernet link is steady! I think there's a bug in auto-negotiation, I think it's using half duplex when it should be full.

But I can ping it:

27 packets transmitted, 27 received, 0% packet loss, time 26000ms
rtt min/avg/max/mdev = 0.129/0.164/0.441/0.060 ms

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martinayotte
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Re: Seeed Arch Max

Post by martinayotte » Wed Jun 08, 2016 3:11 am

Hi Dan,

Which variant did you choose, the DiscoF407 ? I didn't look details yet, do we have already the ETH library for it ?
I should receive my Arch Max board soon, hoping this week !

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ddrown
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Re: Seeed Arch Max

Post by ddrown » Wed Jun 08, 2016 4:09 am

martinayotte wrote:Hi Dan,

Which variant did you choose, the DiscoF407 ? I didn't look details yet, do we have already the ETH library for it ?
I should receive my Arch Max board soon, hoping this week !
For stm32duino, I tried the f4 discovery, which gave me a really slow blink (should be 1/s, was roughly 1/15s)

For testing the Ethernet, I'm using mbed's libraries and examples.

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Vassilis
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Re: Seeed Arch Max

Post by Vassilis » Wed Jun 08, 2016 8:49 am

Yesterday I purchased the same board. It's very interesting board for only $19.90 USD .

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martinayotte
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Re: Seeed Arch Max

Post by martinayotte » Wed Jun 08, 2016 7:21 pm

ddrown wrote: For stm32duino, I tried the f4 discovery, which gave me a really slow blink (should be 1/s, was roughly 1/15s)
It is probably that variant need to be tweaked, but on either schematic or picture we can figured out it the main oscillator is a 8Mhz or not, the value is not written. It is also looks smaller than usual.

stevech
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Re: Seeed Arch Max

Post by stevech » Wed Jun 08, 2016 8:01 pm

Vassilis wrote:Yesterday I purchased the same board. It's very interesting board for only $19.90 USD .
Rather minimal amount of RAM and dated M0 MCU. 8KB of RAM will be a challenge at least, and certainly a time-waster.

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RogerClark
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Re: Seeed Arch Max

Post by RogerClark » Wed Jun 08, 2016 9:17 pm

http://www.st.com/content/st_com/en/pro ... 407ve.html

Reads..

ARM Cortex-M4 core with DSP and FPU, 512 Kbytes Flash, 168 MHz CPU

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martinayotte
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Re: Seeed Arch Max

Post by martinayotte » Wed Jun 08, 2016 9:37 pm

@stevech, I think you've missed that this board is an F407, a M4 not a M0.
The only bad point is that it is sad that they took the 512K Flash variant instead of the 1MB.
For that price, it is unbeatable.
When I will receive it, I hope to figure out all issues and probably purchase some more ... ;)

BTW, for those who wish to get bare chips, the STM32F407VGT, the 1MB version, can be found on AliExpress as low as $6 in single unit free shipping.

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RogerClark
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Re: Seeed Arch Max

Post by RogerClark » Wed Jun 08, 2016 9:47 pm

I will order one today, as it does seem an unbeatable deal.

Its strange that both iTead and Seeed are both, heavily discounting their STM boards.

Perhaps they have a special deal with STM

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