mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-10 13:16:16 +09:00
7f0d241d5c
Split the display command into generic interface and hardware-specific realization for PDSP188x LED display found on hmi1001 and manroland boards. Simple interface for LED displays is defined in include/led-display.h and described in doc/README.LED_display. Driver-specific implementation was moved into drivers/misc/pdsp188x.c file (enabled with CONFIG_PDSP188x set). Signed-off-by: Ilya Yanok <yanok@emcraft.com>
28 lines
952 B
Plaintext
28 lines
952 B
Plaintext
LED display internal API
|
|
=======================================
|
|
|
|
This README describes the LED display API.
|
|
|
|
The API is defined by the include file include/led-display.h
|
|
|
|
The first step in to define CONFIG_CMD_DISPLAY in the board config file.
|
|
Then you need to provide the following functions to access LED display:
|
|
|
|
void display_set(int cmd);
|
|
|
|
This function should control the state of the LED display. Argument is
|
|
an ORed combination of the following values:
|
|
DISPLAY_CLEAR -- clear the display
|
|
DISPLAY_HOME -- set the position to the beginning of display
|
|
DISPLAY_MARK -- enable mark (decimal point), if implemented
|
|
|
|
int display_putc(char c);
|
|
|
|
This function should display it's parameter on the LED display in the
|
|
current position. Returns the displayed character on success or -1 in
|
|
case of failure.
|
|
|
|
With this functions defined 'display' command will display it's
|
|
arguments on the LED display (or clear the display if called without
|
|
arguments).
|