ulx3s/Lobby

emard

@emard

I want same SD card to hold content for DOS and amiga and linux. Amiga wants to mount only 1st partition. Even ESP32 ftp> site mount is picky on partition sizes, in some special cases it will mount msdos which is not on 1st partition but in general it can also refuse

Lawrie Griffiths

@lawrie

Currently the dtb specifies the partition that linux uses for its rootfs, and u-boot.bin has the default boot command built in, and that specifies where uImage and dtb are loaded from. It is not too hard to rebuild them using the building from source description - https://github.com/SpinalHDL/SaxonSoc/tree/dev/bsp/Ulx3sLinuxUboot

emard

@emard

Well to make things super simple - can we make this: have dtb on SPI flash and few options for boot partition: p1,p2,p3. Or If I can somehow find and replace in hex editor mmcblk0p1 with mmcblk0p2 and flash it to spi, that is also ok

Lawrie Griffiths

@lawrie

I think getting the environment working with a uEnv.txt file is probably the best solution. But u-boot.bin would still probably specify which partition and directory that file was in.

We would have to change things in the bootloader to allow the dtb in flash, and that is not sufficient as u-boot.bin also needs to change.

@emard I too would like an sd card that supports multiple applications including Amiga and Linux.

emard

@emard

OK let it all be some TODO, and perhaps good serial port would get pretty high bang for the byte :)

emard

@emard

I have ordered compatible spi-eth module from ebay but ETA is jan-feb next year

Lawrie Griffiths

@lawrie

@Dolu1990 has a W5500 module working as well on other boards, but I couldn't get my one to work.

emard

@emard

I ordered ENC28J60 Ethernet LAN Network module, saw its driver in kernel, I dont care about the performance just that it works

Lawrie Griffiths

@lawrie

He also has a Microchip wilc1000 Wifi module working.

Yes, the ENC28J60 works for me, is easy to connect, and is fast enough for such a small linux system.

Dolu1990

@Dolu1990

@lawrie Normaly, today i will put in service my one on Arty7, will let's you know how it goes

Also, will likely work on some scripts to update the images from the network

Goran Mahovlic

@goran-mahovlic

@lawrie is there any ENC28J60 PMOD? or I need to make one?

Lawrie Griffiths

@lawrie

A Pmod would be useful. What I do is wire the breakout board for the ENC28J60 to a Diglient TPH2 Testpoint Pmod with breaboard wire and then I can plug it in and take it out like a Pmod.

emard

@emard

In the readme have some pins list which GP/GN to connect to ENC, something like:

GP1 - MISO
GP2 - MOSI
GP3 - SCK
etc.

Lawrie Griffiths

@lawrie

I added an Ethernet section to the README with the pin mapping - https://github.com/lawrie/saxonsoc-ulx3s-bin/blob/master/linux/u-boot/README.md

Lawrie Griffiths

@lawrie

You can use a Pmod in the opposite corner (GP0 etc.) for connecting an external JTAG device for debugging etc.

Lawrie Griffiths

@lawrie

I also added a GPIO section to the README.

And a link to the instructions for building from source.

Goran Mahovlic

@goran-mahovlic

Not routed and did not place resistors at place, but schematics and pinout is done ...

Lawrie Griffiths

@lawrie

You have the pins in the opposite order to me, as GP/GN14 is the one closest to GND and I have that as CS/SI.

Goran Mahovlic

@goran-mahovlic

Tnx, will check again and change then

Goran Mahovlic

@goran-mahovlic

That part should be better now

Goran Mahovlic

@goran-mahovlic

I will switch to ENC28J60 QFN

Goran Mahovlic

@goran-mahovlic

This one looks better

emard

@emard

@lawrie great for the pinout, but to minimize dummy brain usage, I prefer to have list with identical pin names written on the module so instead of MISO there's let's say written "SO" and also it's better to mention what to do with rest of the module's pins for example NC - WOL, NC - INT, NC - CLK, GND - GND, 3.3V - VCC instead of let users random guess

emard

@emard

https://www.ebay.co.uk/itm/New-ENC28J60-Ethernet-LAN-Network-Module-For-Arduino-SPI-AVR-PIC-LPC-STM32/141976891928 hey I ordered different module, it has 5V and 3.3V - will it work if powered only from 3.3V and 5V NC ?

Lawrie Griffiths

@lawrie

Yes, mine has 5V, and I have left the 5V and GND at that end unconnected, and am powering it from 3.3V and GND at the other end. CLK and WOL are not connected. Note that INT is connected (see my description) - that is used. I have RST connected to 3.3V, but I expect that can be left unconnected. I will update the description.

Lawrie Griffiths

@lawrie

I have also updated the ebay link to the exact one that I bought. Although the one in the picture says 16/02 and mine says 18/10.

Goran Mahovlic

@goran-mahovlic

should I add holes for screws and make board bigger? Or this one is good enough?

Lawrie Griffiths

@lawrie

Looks good enough to me, but the cable can apply some twisting force to it, so anyone who was using it more than just casually might appreciate a way of fixing it more firmly. But that applies to a lot of Pmods.

Goran Mahovlic

@goran-mahovlic

I can add "ears" for screws and check out how it looks :)

emard

@emard

For USB and ETH board to be properly put in a box, screw holes must be there for mechanical strength.

Goran Mahovlic

@goran-mahovlic

Thanks to Drew we just got sponsorship for PMODs

So I will accept wishes for next next PMODs

Lawrie Griffiths

@lawrie

It that Drew Fustini of OSHPark?

Goran Mahovlic

@goran-mahovlic

Yes :)

Lawrie Griffiths

@lawrie

I have implemented @Dolu1990's flash access on the ulx3s, if anyone is interested. You can do things like:

oot@buildroot:~# hexdump -C -n 100 /dev/mtd3
00000000  93 06 10 00 13 06 00 00  93 05 09 00 13 05 0a 00  |................|
00000010  ef f0 8f f8 6f f0 5f b4  03 a5 89 00 b7 e5 56 c0  |....o._.......V.|
00000020  93 85 45 fb 13 05 85 10  ef 00 0b 8e 93 04 05 00  |..E.............|
00000030  e3 00 05 c4 03 a5 89 00  b7 15 54 c0 13 86 04 00  |..........T.....|
00000040  93 85 45 5b 13 05 85 10  ef 10 0b ef 13 8c 04 00  |..E[............|
00000050  6f f0 df e8 03 a5 89 00  b7 15 54 c0 13 06 00 00  |o.........T.....|
00000060  93 85 85 57                                       |...W|
00000064
root@buildroot:~# flash_erase /dev/mtd3 0 1
Erasing 4 Kibyte @ 0 -- 100 % complete 
root@buildroot:~# echo "Hello" >/dev/m
mem               mmcblk0p1         mtd1              mtd2ro
memory_bandwidth  mtd0              mtd1ro            mtd3
mmcblk0           mtd0ro            mtd2              mtd3ro
root@buildroot:~# echo "Hello" >/dev/mtd3
root@buildroot:~# hexdump -C -n 100 /dev/mtd3
00000000  48 65 6c 6c 6f 0a ff ff  ff ff ff ff ff ff ff ff  |Hello...........|
00000010  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
00000060

emard

@emard

I'm interested, please release updated stuff :))

Lawrie Griffiths

@lawrie

You just need to use sdimagef or sdimagef64 to get the versions with linux flash support. I have copied the dts as well as the dtb to /boot so you can see what dts is being used.

emard

@emard

wonderful!

Lawrie Griffiths

@lawrie

If you flash uboot-env-bin@0x310000, you should get a u-boot environment that you can save with saveenv. It currently saves to /boot/uboot.env in partition1, which must be ext2 or ext4.

I could produce a version for you that uses partition2.

You then need to override the kernel bootargs to make linux use partition 2. I have not tried that. You can see the existing bootargs in the dts.

Lawrie Griffiths

@lawrie

There is now a version of u-boot in uboot-env2.bin@0x310000 that uses partition 2. That is it stores the environment in partition 2 and gets uImage and dtb from partition 2. You still need to override bootargs to make linux use partition 2 as the root partition.

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