TF CD32 Riser Revision 2 Design Complete

[terriblefire]

Will adjust that a bit.

[arkadiusz.makarenko]

Will adjust that a bit.

Thank you.

[arkadiusz.makarenko]

I have cleared all C compilator warnings, which solved one small memory leak which I wasn't able to pin down before.
This allowed me to tidy up main a little as well where I had to find work around issues.

EDIT.
After tidy up and solving some issues in code, I had to tidy up variable definitions etc. and now seems to be ok.
I think I have somewhere wrongly defined or init variable or mess with poiter.

[arkadiusz.makarenko]

Looking at current project I can downgrade project from Stm32f722 to stm32f730. It is half the price, and there would still be like 15-20k left in flash for any potential upgrade.
I will have a look at cpld as well it might be possible to downgrade it from 72 to 36 cells, but it wouldn't have any potential to grow at all. So need to think about that one.

EDIT
CPLD - I take it back, I use 18 cells at this moment, so there would still be another half of the chip to use. Plenty space as at this point it would be used only really to decode few other addresses.

[terriblefire]

Looking at current project I can downgrade project from Stm32f722 to stm32f730. It is half the price, and there would still be like 15-20k left in flash for any potential upgrade.
I will have a look at cpld as well it might be possible to downgrade it from 72 to 36 cells, but it wouldn't have any potential to grow at all. So need to think about that one.

EDIT
CPLD - I take it back, I use 18 cells at this moment, so there would still be another half of the chip to use. Plenty space as at this point it would be used only really to decode few other addresses.

Yeah the CPLD can go down to a 36 no problem. I had envisioned it might do more stuff but really its just an address decoder. Keep the ARM big though. There is soundcard potential there too.

[arkadiusz.makarenko]

Looking at current project I can downgrade project from Stm32f722 to stm32f730. It is half the price, and there would still be like 15-20k left in flash for any potential upgrade.
I will have a look at cpld as well it might be possible to downgrade it from 72 to 36 cells, but it wouldn't have any potential to grow at all. So need to think about that one.

EDIT
CPLD - I take it back, I use 18 cells at this moment, so there would still be another half of the chip to use. Plenty space as at this point it would be used only really to decode few other addresses.

Yeah the CPLD can go down to a 36 no problem. I had envisioned it might do more stuff but really its just an address decoder. Keep the ARM big though. There is soundcard potential there too.

I will take my time to review it, but at this moment I think the only difference is in size of flash memory. RAM on both chips is the same. Initially firmware growth was substantial due to usb stack and usb libraries,now it is much slower.
Currently there is about 30-35k taken (25k ? with size optimalization) F730 wouls still have like 25-30k flash left for growth.

Ps. Soundcard any more details, please?

[terriblefire]

Yeah the CPLD can go down to a 36 no problem. I had envisioned it might do more stuff but really its just an address decoder. Keep the ARM big though. There is soundcard potential there too.

I will take my time to review it, but at this moment I think the only difference is in size of flash memory. RAM on both chips is the same. Initially firmware growth was substantial due to usb stack and usb libraries,now it is much slower.
Currently there is about 30-35k taken (25k ? with size optimalization) F730 wouls still have like 25-30k flash left for growth.

Ps. Soundcard any more details, please?

Since you are already implementing most of the clockport ... maybe emulate a clockport sound card..

There are 2 DACs on the arm that come out to that 3 pin header....

I'd need to dig into the details of how those soundcards work for more ideas.

[arkadiusz.makarenko]

I will take my time to review it, but at this moment I think the only difference is in size of flash memory. RAM on both chips is the same. Initially firmware growth was substantial due to usb stack and usb libraries,now it is much slower.
Currently there is about 30-35k taken (25k ? with size optimalization) F730 wouls still have like 25-30k flash left for growth.

Ps. Soundcard any more details, please?

Since you are already implementing most of the clockport ... maybe emulate a clockport sound card..

There are 2 DACs on the arm that come out to that 3 pin header....

I'd need to dig into the details of how those soundcards work for more ideas.

I wasn't aware that there are clockport soundcards...

[8 Bit Dreams]

Oh yes.. There are few

IMG-20201117-WA0015.jpg (167.46 KiB) Viewed 3626 times

Delfina, for example..

[arkadiusz.makarenko]

Keep the ARM big though. There is soundcard potential there too.

Now I get it. MP3 De-Codecs only are like 50k.
This is quite impressive on paper : https://www.st.com/en/embedded-software ... l#overview
So features like mp3 player should be doable as Amiga has just to supply data to stm32 buffer quickly enough.