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phl0 / MMDVM_HS_Dual_Hat

Duplex variant of MMDVM_HS_Hat
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The STM32F103C8T6's rom size is not enough for USB #6

Open jcyfkimi opened 4 years ago

jcyfkimi commented 4 years ago

Hi I just build your board and found that the STM32F103C8T6's ROM size is not enough for USB version, only can go for GPIO. Replacing the MCU with STM32F103CBT6 can make it work. It has 128K ROM.

ra1nb0w commented 3 years ago

Have you tried the STM32F103CBT6?

jcyfkimi commented 3 years ago

Have you tried the STM32F103CBT6?

Yes, I'm using STM32F103CBT6 right now. Works both for GPIO and USB.

ra1nb0w commented 3 years ago

Ok. Thank you @jcyfkimi

ra1nb0w commented 3 years ago

Now, the hard point is to find it from a distributor :)

jcyfkimi commented 3 years ago

Yeah, that's really a disaster. Not sure what's your location, I checked with mouser usa, it's still available, just for the price. Or you can try with aliexpress.

ra1nb0w commented 3 years ago

In my mouser (EU) it is not available (511-STM32F103CBT6); on order without ETA.

jcyfkimi commented 3 years ago

Maybe have a try with aliexpress, I know lots of the chips come from aliexpress are recycled and the quailty varies, even with fake chips (for stm32 microcontrollers, I don't think there're fake chips), but considering current stocking status as well as the price issue, I think it's worth to try.

ra1nb0w commented 3 years ago

Yes, I will try. Thank you.