Simple CircuitPython Driver for Generic 64Mb PSRAM (AF4677)

[MarksBench]

Hello!

I scratched together a working MicroPython driver for the 64Mb SPI PSRAM chip from Adafruit (https://www.adafruit.com/product/4677) a little while ago and finally got some time to get it working in CircuitPython. I've tested it with v6.2, 6.3, and 7.0.0-alpha.3 on a Raspberry Pi Pico (RP2040) and while it's not fast, it did continuous read/write loops for 48 hours with no failures.

If you're interested, you can find the driver and an example program here: https://github.com/MarksBench/mb_PSRAM_64Mb_SPI_CP

Like the other memory-ish drivers I've done up so far, it's meant to be as simple as possible to use. Give it an address (0-8388607) and an 8-bit value and it will write to that location. To read, just give it the address and it will return an integer (range 0-255).

Have a good day!

[adafruit_support_mike]

Nice.. thanks for posting it!

[MarksBench]

My pleasure - I've been enjoying figuring this stuff out!