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
The chip supports 133MHz and the other Pico core already defaults to
the higher speed, so make 133 the default.
It can still be changed through the menus and will stay at 125 unless
pre-existing users change it so they will see no difference.
To remove compiler warning the valid core macro was modified to only check
that the core passed in was < # of total cores. Unfortunately there are
parts of the FreeRTOS code where the passed in core # is -1. The upstream
catches this and returns FALSE, but my hacked version returned TRUE. This
caused interesting memory corruption errors and crashes when the
current task block[-1] was updated.
Undo the change and fix the 1 spot where a warning happens instead.
Undo the forced compiler -O0 for port.c, it was only masking the fault.
Use low power WFE when idle.
Set PORT.C to built `-O0` always because it seems to occasinally end
up with interrupts disabled in task code, causing the SYSTICK never to
fire and killing task switching.
No need for dynamic exceptions. We don't move the execbase.
Adds code to define which pins are used, moving them from the defaults, which are the same as the only three analogue input pins, and adding comments to explain how to change them.
The original didn't give any clues about which pins were used, which isn't ideal for a beginner - it was necessary to look at the code for the library, to work that out.
The new code redundantly defines a pWS pin number (as pBCLK+1), which isn't used in the example, but is meant as a reminder to the person using it, of how to wire up WS.
Using all the work from @hfellner and others, add FreeRTOS
SMP support.
Allow idling cores through the FreeRTOS FIFO queue to
allow for file system and EEPROM support.
Make delay a weak function so FreeRTOS can override.
Add cycle count support under FreeRTOS using a PIO SM.
Use a task-based approach for handling the USB periodic work
instead of the IRQ-based one in the main core.
Set 8 prio levels so it fits in 3 bits nicely (0..7).
I receive mails weekly asking how to use `SoftwareSerial` on this core.
Avoid the issue by including a simple wrapper class around `SerialPIO`
which gives the proper class name and constructor parameters.
Note that inverted mode is not supported.
