wasp-os.git/wasp/drivers, branch master

drivers: hrs3300: Reduce HGAIN to x8

2021-09-10T20:17:57Z

Experimentally drop the HGAIN to x8. Currently the evidence base for
this change is a little weak but it doesn't seem to be *worse* than
what we have now. Therefore I hope the wasp-os users will forgive me
for using them as guinea pigs!

Signed-off-by: Daniel Thompson

drivers: cst816s: Add a version() method

2021-06-20T16:26:32Z

Signed-off-by: Daniel Thompson

rtc: Undo the once-per-second wake up

2021-06-19T07:22:20Z

So... waking up once per second turns out to be a dumb idea because it
regresses the stop watch and HRS tools (which now also only wake up once
per second).

Undo this change but sprinkle a few more micropython.native decorations
on methods used on the wakeup path to minimise power.

Fixes: fb18705b9b9cc ("manager/rtc: Experimental power saving technique")
Signed-off-by: Daniel Thompson

drivers: nrf_rtc: Fix sphinx build

2021-06-18T20:43:47Z

Signed-off-by: Daniel Thompson

manager/rtc: Experimental power saving technique

2021-06-04T09:49:33Z

Currently the time is calculated 8 times per second from (relatively) slow
python code. Optimize the power consumed by reducing the number of times
we check for wall time updates to only once-per-second and use native
code generation to reduce VM overhead when executing this critical code.

At the time of writing the difference is battery life has not yet been
measured (but we know the current master branch is worse than v0.4 and,
in theory at least, this should close the gap).

Signed-off-by: Daniel Thompson

st7789: Fix incorrect variable name in ST7789_SPIs. init docstring.

2021-02-20T08:46:59Z

The data signal pin name is dc, not cs.

Signed-off-by: Piotr Tworek

drivers: st7789: Further reduce allocations during set_window()

2021-01-17T17:44:50Z

Signed-off-by: Daniel Thompson

drivers: st7789: Pre-allocate a memoryview

2021-01-17T17:44:21Z

Reduce the cost of slicing the linebuffer by pre-allocating a memoryview.

Signed-off-by: Daniel Thompson

drivers: st7789: Optimize set_window()

2021-01-17T16:08:27Z

For small graphical items (line drawing, font glyphs) the performance
of the set_window() method is critical.

Emit native code for this function and optimize the SPI write_cmd()
method to avoid memory allocation. This give a performance boost of
a little over 15% for (24pt) font rendering and 30% for line drawing.

Signed-off-by: Daniel Thompson

drivers: bma421: Switch over to reset_step_counter()

2020-12-31T09:31:47Z

Currently the bma421 driver simple re-initializes the sensor when asked
to set the step counter to zero. Switch over to the proper function
for this.

Signed-off-by: Daniel Thompson