Migrated all patches from the previous version.
A change in the Findpicotool.cmake script in the pico-sdk led to a
downgrade of picotool, which incorporated mbedtls into the build, which
itself is not buildable with cmake versions < 3.5.
The commit which made this isolated change was reverted. Future versions
of micropython will use pico-sdk 2.2.0 or newer, where this problem is
fixed, and picotool is pinned to a release version.
In theory, the FIFO interrupt could occur after getting the
fifo_read_value and reenabling interrupts, but before __wfi is called,
causing a deadlock. Fix this by calling __wfi with interrupts still
disabled. It will return immediately if an interrupt is pending.
Add two __nop to ensure that the CPU has enough instructions between
enabling interrupts and disabling them again at the top of the loop.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Add write support to rp2_sd driver.
Cleanup standalone-mp3 test tool and add write test mode.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
The python and C modules that are supposed to be built into the firmware
image (i.e. those that are in manifest.py or in USER_C_MODULES) have
been moved to the software/modules directory.
The software/src directory should now only contain python scripts and
other files that should be installed to the Picos flash filesystem. The
idea is that these should be those scripts that implement the
application behaviour, as these are the ones that a user who does not
want to build the whole firmware themself wants to modify.
