We add a new bool isExpander to the the I2C constructor. This allows
us (in the case we are not dealing with an expander) to just
initialize the i2c context only and bail in the constructor. The
default is true to preserve backward compatibility.
Additionally, add two new virtual protected methods, data() and
command() for sending data or commands to the controller. The default
implementation in lcm1602 will work for 4bit GPIO and expander use.
In the case of jhd1313m1, they will need to be redefined in that class
as the sematics for sending data and commands are different.
All of the underlying functionality will use command() or data() as
appropriate.
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
In addition, move the command/data sending methods into the protected
block so that derived classes can use them if need be.
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit removes the I2C context from the LCD base class and moves
it into each of the drivers.
In addition, the createChar() virtual function was removed from the
base class, as it directly used the now non-existant i2c context, and
it would not work on anything other than hd44780 based controllers and
displays anyway. Also, it is likely the capability itself, as well as
the data required to implement it, is going to be different from
device to device.
createChar() has been added to the Lcm1602 driver which can support it.
While doing this work, the LCD base class m_name is now set appropriately
in the driver constructors.
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
We keep the same upm module library name (i2clcd), and the header
documentation still specifies @library i2clcd.
These will need to be changed when the actual library is renamed.
Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
Reformatted to prepare for improving the error handling. This reformatting
was done using clang-format.
Signed-off-by: Wouter van Verre <wouter.van.verre@intel.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
