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Create weak links from MicroPython specific implementations of
modules to standard names. I.e. allow `import time` to import
utime module.

It's 44 years since the release of vi and sadly lots of editors still
don't care about trimming off trailing spaces ...
Signed-off-by: Rahix <rahix@rahix.de>

This allows to read and write strings to the config file.

Instead of an ugly hack where spaces are used to pad the entries
background colors, properly draw a rectangle and the text above
it.  No visual change.
Signed-off-by: Rahix <rahix@rahix.de>

Signed-off-by: Rahix <rahix@rahix.de>

Fix all warnings in pycardium/modules.
Signed-off-by: Rahix <rahix@rahix.de>

As discussed in card10/firmware!357

, we should increase the number of
enabled compiler warnings to catch a lot more silent bugs.  Increase the
meson-global warning level to 2, but excluding the `unused-parameter`
and `old-style-declaration` warnings.  Additionally, disable warnings
for libraries as we cannot fix that code anyway.
Signed-off-by: Rahix <rahix@rahix.de>

Implement the hal functions necessary for utime.ticks_ms() and
utime.ticks_us().  This enables much more accurate measurements of time
taken in Pycardium (useful for profiling).

Please note that the tick counter will reset whenever a new app is
loaded.
Signed-off-by: Rahix <rahix@rahix.de>

fgross authored Nov 13, 2019 and Rahix committed Nov 13, 2019

The framebuf module provides a framebuffer implementation running purely
in MicroPython which will increase drawing performance by a lot.  A
follow-up change will be necessary to connect this framebuffer
implementation to the display API.

This commit is implements a part of MR !211.

Rewrite the delay implementation to be more accurate and properly handle
incoming MicroPython interrupts (See issue #177).

For this, the delay is split into two functions:

- systick_delay_precise(): Delay with microsecond accuracy for delays
      less than 1 ms.
- systick_delay_sleep(): Sleep for a potentially very long time, using
      WFI to put the CPU to sleep.  Whenever the CPU wakes up, this
      function will poll the MicroPython scheduler so it can execute
      pending interrupts.

Ontop, this implementation allows for a future, fast, tick-based
monotonic time implementation (e.g. mp_hal_ticks_ms).
Signed-off-by: Rahix <rahix@rahix.de>

Enable the input() builtin which allows reading from the serial console.
Signed-off-by: Rahix <rahix@rahix.de>

Allow calling buttons.read() without an argument.  This is equivalent to
a mask with all bits set (that is, buttons.read(255)).  Additionally,
add a check that the mask is within the limits (< 256).
Signed-off-by: Rahix <rahix@rahix.de>

For convenience, allow calling os.listdir() without any argument.
This is equivalent to calling os.listdir("").
Signed-off-by: Rahix <rahix@rahix.de>

Philip Stewart authored Oct 05, 2019 and Rahix committed Oct 05, 2019

Fix two bugs in the display/gfx module:

1. The animation of the simple_menu used in the main menu had the issue
   that there is a black line visible at the top.  This is due the
   gfx_puts method ignoring lines, where the top pixel of the string is
   above the top of the screen.  As gfx_puts uses gfx_setpixel which in
   turn ignores pixels outside of the screen, remove the check in
   gfx_puts.
2. X and Y coordinates were cast to unsigned-ints before being given to
   the gfx-library which means calls like circ(0, -10, 30) would be draw
   at coordinates like [0,65526].  Fix this by changing the data-type of
   all coordinates to signed-integers.

Also remove the x and y ranges from the documentation of the individual
python functions and instead add a general documentation about the
screen and it's size/coordinate system.

Previously, we left out the dependency of the QSTR header on
`modules.h`.  This was done to prevent rebuilds of the entire
MicroPython sources whenever a Pycardium module is changed. This
leads to issues where QSTRs got out of sync and weird errors like
the following could happen:

    import foo_module

    Exception: No module `abc_def` (a different string than expected)

Attempt to fix this by only updating the QSTR header when the
module-header actually changes.  For this, a few workarounds are needed:

- Replace symlinks with actual copied files so timestamps change on
  updates.
- Add a hack so meson picks up on the dependency of the file in genhdr/
- Rename the outer file so older meson versions don't complain about
  multiple targets with the same name.
Co-authored-by: dx <dequis@dequis.org>
Signed-off-by: Rahix <rahix@rahix.de>

Signed-off-by: Rahix <rahix@rahix.de>