Remove MIDI support from the core's main TinyUSB. MIDI is still supported
using the Adafruit TinyUSB library, just like before (the core never
did use it).
Compile the Pico-SDK using `-Os`
Remove unneeded warning in UF2 upload
Blink.ino shows a savings of 3.5KB flash and 400 bytes of RAM.
For comparison, with this PR blink.ino reports:
````
Sketch uses 49908 bytes (3%) of program storage space. Maximum is 1568768 bytes.
Global variables use 7024 bytes (2%) of dynamic memory, leaving 255120 bytes for local variables. Maximum is 262144 bytes.
````
As comparison, using the MBED core blink.ino reports:
````
Sketch uses 78882 bytes (0%) of program storage space. Maximum is 16777216 bytes.
Global variables use 42780 bytes (15%) of dynamic memory, leaving 227556 bytes for local variables. Maximum is 270336 bytes.
````
So, with this PR we use **37% less flash** and and **87% less RAM**
for simple sketches.
This PR includes a pico-sdk built using the fix in
https://github.com/raspberrypi/pico-sdk/pull/864
To properly fix it requires a new pico-sdk release. but until then I am
building against my own fork of pico-sdk and including the binary.
When 1.3.2 is out (and assuming my PR is approved) I'll update the pico-sdk
link.
Fixes#614
Fixes a hang found while debugging #614. Do all memory allocations and
USB descriptor setup in main code prior to `tusb_init()`. Avoids potential
deadlock in cases where the app is allocating while the USB port is being
set up.
When get.py is run in a script the percent-update printouts shown while
downloading the toolchain end up as 100s to 1000s of lines in log files.
When stdout is not a terminal, avoid printing these percentages and
shrink logfiles significantly. Errors/etc. are still reported as normal.
Free up 4K of RAM and 6K of flash when no exceptions are enables (default).
The original toolchain was including exception code in libstdc++ by default.
Reduce installation by ~50MB and download by ~25M by removing unused LTO
gcc support.
Fixes#609 and a niggling slowness in uploads. Try to find the drive
in a loop for 10 seconds, instead of only checking once after 10 seconds.
Avoid 100% CPU usage while waiting for Pico drive
Add plumbing to allow `Wire`, `Serial1`, `SPI1` to map to the 2nd
hardware unit for devices where the PCB layout only brings out the
2nd port.
Fix the Seeedstudio XAIO pins
Fixes#594
Rewrite the I2S code from scratch to eliminate the dependence on the
pico-extras implementation and to support I2S input as well.
8-bit, 16-bit, 24-bit, and 32-bit words are supported.
Multiple I2S ports are allowed (theoretically up to 6 because
2 DMA channels are required per port).
I2S input and I2S output are supported.
Add input example
Fixes#535Fixes#99Fixes#562
