HD44780 controller can indicate via busy flag whether it's finished
processing current command. This allows for faster completion of HD44780
commands as seen from MCU perspective, as the MCU doesn't have to wait
for fixed long period of time. Implement this functionality.
Signed-off-by: Jan Kuliga <jtkuliga@gmail.com>
If proper power supply is used to power the hd44780, it initializes
correctly on a reset condition all by itself. However,
if the power supply is below its expectations (e.g. some 3.3V Nucleo
board), it won't initialize properly on its own, and the MCU
has to carry out the initialization as listed in the reference manual.
Since we cannot determine it properly in the runtime,
always carry out the initialization procedure.
Signed-off-by: Jan Kuliga <jtkuliga@gmail.com>
In order for the driver to be compliant with the timing sequence
diagrams presented in the reference manual, the MCU has to wait
for some additional period of time while setting both the rs and rw
lines.
Signed-off-by: Jan Kuliga <jtkuliga@gmail.com>
Express delay values in nanoseconds. Set the default delay time values
as specified in the HD44780 reference manual.
Signed-off-by: Jan Kuliga <jtkuliga@gmail.com>
There's no need to set this line every single time a command is sent
to the HD44780. Set it only once, so that one can save some cpu cycles.
Signed-off-by: Jan Kuliga <jtkuliga@gmail.com>
Namespaced the generated headers with `zephyr` to prevent
potential conflict with other headers.
Introduce a temporary Kconfig `LEGACY_GENERATED_INCLUDE_PATH`
that is enabled by default. This allows the developers to
continue the use of the old include paths for the time being
until it is deprecated and eventually removed. The Kconfig will
generate a build-time warning message, similar to the
`CONFIG_TIMER_RANDOM_GENERATOR`.
Updated the includes path of in-tree sources accordingly.
Most of the changes here are scripted, check the PR for more
info.
Signed-off-by: Yong Cong Sin <ycsin@meta.com>
Move the syscall_handler.h header, used internally only to a dedicated
internal folder that should not be used outside of Zephyr.
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This adds a few line use zephyr_syscall_header() to include
headers containing syscall function prototypes.
Signed-off-by: Daniel Leung <daniel.leung@intel.com>
Fixed Input Set handling.
Flag had misleading names: whether "entry" happens to the left or to the
right is dependent on whether increment mode is active or not), so
switched to just using a "SHIFT" y/n flag instead. It also reflects better
the contents of the datasheet).
Updated romance text direction accordingly ("increment, no shift").
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Added several missing undeclared config variables causing the driver to
not compile properly.
Fixes#59078.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Ports the Jinghua Display JHD1313 LCD (with RGB backlight) driver
to use the new auxdisplay driver interface. This driver is used on
the seeed grove LCD RGB display, and replaces it.
Signed-off-by: Jamie McCrae <spam@helper3000.net>
