CircuitPython - a Python implementation for teaching coding with microcontrollers https://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=6.2.x 2021-03-22T22:24:27+00:00 2021-03-22T22:24:27+00:00 Scott Shawcroft scott@tannewt.org 2021-03-22T22:24:27+00:00 urn:sha1:f200e6a21e851ab541027d33baf897fa5e5d4b0c 2021-03-18T23:55:42+00:00 Scott Shawcroft scott@tannewt.org 2021-03-04T21:12:24+00:00 urn:sha1:5d2b60cbf69c99abd6984c298d4f052514221177 This switches stage2 to C and uses Jinja to change the C code based on flash settings from https://github.com/adafruit/nvm.toml. It produces the fastest settings for the given set of external flashes. Flash size is no longer hard coded so switching flashes with similar capabilities but different sizes should *just work*. This PR also places "ITCM" code in RAM to save the XIP cache for code execution. Further optimization is possible. A blink code.py still requires a number of flash fetches every blink. Fixes #4041 2021-03-15T13:57:36+00:00 microDev 70126934+microDev1@users.noreply.github.com 2021-03-15T13:57:36+00:00 urn:sha1:a52eb88031620a81521b937f2a0651dbac2bb350 2021-02-23T02:35:09+00:00 Scott Shawcroft scott@tannewt.org 2021-02-23T02:35:09+00:00 urn:sha1:3fdf29e773852367ce433ffc9a3a5bbd7b3f379e 2021-02-23T01:19:18+00:00 Scott Shawcroft scott@tannewt.org 2021-02-23T01:19:18+00:00 urn:sha1:0aafeac20915fc2844f009cc210c76a4fec32c55 Stop-gap solution for #4041. Comment is there to provide info needed in the future. (We currently run the generic "safe" settings.) 2021-01-21T03:16:56+00:00 Scott Shawcroft scott@tannewt.org 2021-01-21T00:47:18+00:00 urn:sha1:733094aead6e84b42da54655b2b0a5d0dbd1a503 The RP2040 is new microcontroller from Raspberry Pi that features two Cortex M0s and eight PIO state machines that are good for crunching lots of data. It has 264k RAM and a built in UF2 bootloader too. Datasheet: https://pico.raspberrypi.org/files/rp2040_datasheet.pdf