Search found 5 matches

by kdv
Sun Dec 13, 2020 8:11 am
Forum: Other Boards
Topic: [NUCLEO-STM32H7A3] stm32lib port
Replies: 2
Views: 703

Re: [NUCLEO-STM32H7A3] stm32lib port

I don't have a NUCLEO-STM32H7A3 board, but just out of curiosity: does the attached .dfu binary boot?
Install using dfu-util -a 0 -D firmware.dfu
by kdv
Mon Dec 07, 2020 6:52 pm
Forum: Hardware Projects
Topic: STM32H7A3 and external SPI RAM
Replies: 0
Views: 340

STM32H7A3 and external SPI RAM

repl prompt on STM32H7A3. Working towards getting 8 mbyte ram on stm32 micropython.

```
MicroPython v1.13-237-g8db488963-dirty on 2020-12-07; DEVEBOX STM32H7XX with STM32H7A3
Type "help()" for more information.
>>> import gc
>>> gc.mem_free()
999584
```
https://github.com/koendv/micropython-spiram
by kdv
Sat Dec 05, 2020 9:45 am
Forum: Other Boards
Topic: New STM32H743VIT6 dev boards
Replies: 35
Views: 6910

Re: New STM32H743VIT6 dev boards

DEVEBOX STM32H750 micropython binaries and installation notes
by kdv
Thu Dec 03, 2020 7:43 am
Forum: Other Boards
Topic: New STM32H743VIT6 dev boards
Replies: 35
Views: 6910

Re: New STM32H743VIT6 dev boards

This is STM32H 750VB T6 boart with only 128K of flash! Don't believe sellers without any descriptions... STM says the H750 has only 128kbyte flash, but the chip I have has 2 mbyte flash on it. If you boot in DFU over USB the bootloader hangs if you try to write all 2mbyte. But connecting a debugger...
by kdv
Wed Oct 28, 2020 6:48 pm
Forum: Drivers for External Components
Topic: spi ram
Replies: 1
Views: 339

spi ram

FYI: driver for external qspi ram. https://github.com/koendv/micropython-psram Perhaps a small explanation. I needed more ram than available, so I unsoldered an spi flash chip from a board, and soldered an spi ram in its place. Wrote a small driver; implemented a module for reading and writing bytes...