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SukkoPera / OpenFlops

Open-Hardware Floppy Drive Simulator
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Is there a replacement for the U3? #13

Open dippaolo opened 3 years ago

dippaolo commented 3 years ago

Is there a replacement for the U3?

Access to the STM32F105RBT6 microcontroller is difficult.

You can get it, but it's expensive :(

SukkoPera commented 3 years ago

No, feel free to mod the design to use a different IC.

Bytedecode72 commented 2 years ago

i've got some GD32F105RBT6 coming instead of the STM32F105RBT6

SukkoPera commented 2 years ago

If it works, can you please provide a link to where those can be bought?

ra1nb0w commented 2 years ago

@Bytedecode72 any news with GD32F105RBT6? thank you

ra1nb0w commented 2 years ago

seems that also AT32F415RCT7 (from new GOTEK boards) is usable but not findable in the market

Bytedecode72 commented 2 years ago

seems that also AT32F415RCT7 (from new GOTEK boards) is usable but not findable in the market

if you contact keir fraser i believe he has some f415's still if not they can be purchased on aliexpress

Bytedecode72 commented 2 years ago

@Bytedecode72 any news with GD32F105RBT6? thank you

i got the chips just need to order other components and assemble then get debug firmware on there to see if anything is tripping it up.

ra1nb0w commented 2 years ago

Thank you @Bytedecode72 for the update. Report back when it will work (or not).

Bytedecode72 commented 2 years ago

Thank you @Bytedecode72 for the update. Report back when it will work (or not).

i will do just waiting on the components now all sourc bom e

ra1nb0w commented 2 years ago

I bought an GD32F105RBT6 too. We will see ;-)

SzymonGk commented 1 year ago

Thank you @Bytedecode72 for the update. Report back when it will work (or not).

i will do just waiting on the components now all sourc bom e

Hi, any update regarding GD32F105RBT6?

SzymonGk commented 1 year ago

I do not think that GD32F105RBT6 is compatible substitution for STM32F105RBT6. I soldered IC to the board and programmed with hex flie provided for STM32F105RBT6 (FlashFloppy), unfortunately device does not work. I programmed it via two methods, first via Demonstrator Gui and second via StLink2 soldering two thin wires to pins 46(SWDIO) and 49(SWCLK). I tried also Giga Devices programming software but it crashes when hex file selected.

SukkoPera commented 1 year ago

It should be compatible but it requires a dedicated firmware, I think. Please see the FlashFloppy project page.

rinaldimj commented 2 months ago

seems that also AT32F415RCT7 (from new GOTEK boards) is usable but not findable in the market

The F105 can be directly replaced by the F415 on the boards? Meaning pin-to-pin compatible?