TF CD32 Riser Revision 2 Design Complete

68030 + SDRAM + IDE

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Re: TF CD32 Riser Revision 2 Design Complete

Post by terriblefire » Tue Nov 17, 2020 8:50 am

makaron wrote:
Mon Nov 16, 2020 9:32 pm

I built new card today.
I haven't ordered 100k resistors on video line (installed biggest I had 20k for now), but video is badly overexposed and colours do not match, video is very soft.
I will try with 100k in few days and will let you know.
I think the resistors need to be 75R but i'll check. those are pull down resistors to ground IIRC.

NOTE: never trust any values i put in schematics.. i never set the values until after i build it.
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Re: TF CD32 Riser Revision 2 Design Complete

Post by makaron » Tue Nov 17, 2020 10:26 am

terriblefire wrote:
Tue Nov 17, 2020 8:50 am
makaron wrote:
Mon Nov 16, 2020 9:32 pm

I built new card today.
I haven't ordered 100k resistors on video line (installed biggest I had 20k for now), but video is badly overexposed and colours do not match, video is very soft.
I will try with 100k in few days and will let you know.
I think the resistors need to be 75R but i'll check. those are pull down resistors to ground IIRC.

NOTE: never trust any values i put in schematics.. i never set the values until after i build it.
I did suspect that this might be the case. (datasheet has 75R)

PS
I need to order smd resistor set, it starts to annoy me that I never have right values and need to wait ages for delivery..

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Re: TF CD32 Riser Revision 2 Design Complete

Post by terriblefire » Tue Nov 17, 2020 10:38 am

makaron wrote:
Tue Nov 17, 2020 10:26 am
terriblefire wrote:
Tue Nov 17, 2020 8:50 am


I think the resistors need to be 75R but i'll check. those are pull down resistors to ground IIRC.

NOTE: never trust any values i put in schematics.. i never set the values until after i build it.
I did suspect that this might be the case. (datasheet has 75R)

PS
I need to order smd resistor set, it starts to annoy me that I never have right values and need to wait ages for delivery..
I get the £9 assorted sets with 20 of every value

Somthing like this

https://www.ebay.co.uk/itm/2000pcs-0-oh ... SwW2RdMYAx
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Re: TF CD32 Riser Revision 2 Design Complete

Post by makaron » Tue Nov 17, 2020 2:17 pm

@terriblefire
I did find few resistors 68R
There are some small differences but maybe resistor values migh need to be better adjusted if someone is looking for perfection? Anyway it is good enough for me.

Unbuffered
20201117_140942.jpg
20201117_140942.jpg (300 KiB) Viewed 395 times
Buffered with 68R
20201117_141034.jpg
20201117_141034.jpg (364.05 KiB) Viewed 395 times

And I fuc**ed up order. I ordered wrong usb stacked connectors (usb 3.0), and destroyed my other one when I tried to desolder it from old board. Another few days wait for parts now :D

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Re: TF CD32 Riser Revision 2 Design Complete

Post by makaron » Tue Nov 17, 2020 7:09 pm

I am not too patient. I trimmed "spare" legs on stacked USB which I got, and it works both HS and FS.
I need to update firmware to changes in pin wiring.

I don't have any spare 1220 batteries at home, ordered some today. Need to complete and test RTC support.

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Re: TF CD32 Riser Revision 2 Design Complete

Post by makaron » Tue Nov 17, 2020 9:55 pm

Managed to start it. :)
I had some hiccup with RTC LSE, it needs different config to start. Using default values it was unstable - which caused hangs for some reason, when values were written to RTC registers. (RTC init was in constant never ending loop).
Waiting for battery to make sure that time is kept even in power off mode.

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Re: TF CD32 Riser Revision 2 Design Complete

Post by arkadiusz.makarenko » Thu Nov 19, 2020 12:12 am

Another few elements working (keyboard).
Few minor bugfixes with managing registers have been added.
Unfortunately still don't know why cd32 pad is not being detected correctly.
I am setting up cross compiler to modify ATK to show me what exactly is being read and why it doesn't pass detection. ... but setting up compiler is painful and takes ages!
Do not trust people. They are capable of greatness.
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Re: TF CD32 Riser Revision 2 Design Complete

Post by terriblefire » Thu Nov 19, 2020 8:30 am

arkadiusz.makarenko wrote:
Thu Nov 19, 2020 12:12 am
Another few elements working (keyboard).
Few minor bugfixes with managing registers have been added.
Unfortunately still don't know why cd32 pad is not being detected correctly.
I am setting up cross compiler to modify ATK to show me what exactly is being read and why it doesn't pass detection. ... but setting up compiler is painful and takes ages!
IIRC the ATK can be built on a generic compiler that you can apt-get install.
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arkadiusz.makarenko
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Re: TF CD32 Riser Revision 2 Design Complete

Post by arkadiusz.makarenko » Thu Nov 19, 2020 1:19 pm

My opinion on compiling cross compilers from source...
table.png
table.png (12.77 KiB) Viewed 240 times
Do not trust people. They are capable of greatness.
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Re: TF CD32 Riser Revision 2 Design Complete

Post by terriblefire » Thu Nov 19, 2020 1:31 pm

arkadiusz.makarenko wrote:
Thu Nov 19, 2020 1:19 pm
My opinion on compiling cross compilers from source...

table.png
Or you can use the prebuilt docker container. :)
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