MicroPython now supports external SDRAM for STM32F7DISCO

dcexpert

MicroPython now supports external SDRAM for STM32F7DISCO [Copy link]

 Micropython has started to support the onboard 16M SDRAM of the STM32F7Disc development board. I will find time to update and review the new firmware in the near future.

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懒猫爱飞

You can play with this. Micropython is still quite popular. You can't go wrong by playing with popular technology^_^

gummy

The biggest problem with SDRAM is that it is expensive. In fact, 16M SDRAM can be replaced by PSRAM. If the bandwidth requirement is not particularly high, it is best to use serial QSPI PSRAM, which has a very simple interface and operation and is also cheap.

dcexpert

gummy posted on 2019-3-28 10:03 The biggest problem with SDRAM is that it is expensive. In fact, 16M SDRAM can be replaced by psram. If the bandwidth requirement is not particularly high, it is best to use...

psram has lower performance and is more troublesome to use, but other aspects are good.

gummy

dcexpert posted on 2019-3-28 10:12 PSRAM has low performance and is troublesome to use, but other things are good.

Actually, no, as far as I know, if the bandwidth requirement is not particularly high, the serial QSPI PSRAM has very simple interface, programming and operation. The SOP8 package has a small PCB size and saves space, has few I/Os and low power consumption, and is very similar to SPI NOR in use.

threetigher

gummy posted on 2019-3-28 10:03 The biggest problem with SDRAM is that it is expensive. In fact, 16M SDRAM can be replaced by psram. If the bandwidth requirement is not particularly high, then it is best to use...

SDRAM is much cheaper than SRAM. As for QSPI, not all chips support it.

threetigher

gummy posted on 2019-3-28 11:19 Actually no, as far as I know, if the bandwidth requirement is not particularly high, the serial QSPI PSRAM, interface, programming, and operation are very simple, SOP8 sealing...

I would like to ask, how many fps can be achieved when using QSPI's PSRAM to refresh the LCD, 800*480?