readme.txt

Philips芯片saa1064驱动.saa1064是I2C接口控制的LED控制芯片,一般做为前面板的控制芯片

Name
----
saa1064

Overview
--------
Proprietary kernel module used to control the front panel LED display

Associated Device(s)
--------------------
/dev/saa1064

Parameters
----------
debug              : Enable additional debug output [default 0]
scroll_enable      : Enable scrolling (0-1) [default 0]
scroll_forwards    : Scroll forwards (0-1) [default 1]
scroll_delay       : Scroll delay in milliseconds [default 500]
display_brightness : Display brightness (0 - 7) [default 4]

Description
-----------
This module is used to control the output of the front panel LED display. The
display consists of four 7-segment displays each with a dot.

The LEDs can display alpha numeric character strings (up to 256 characters) 
which can be scrolled at variable speeds through the display.

Updated display strings can be sent to the display by writing to the device.

All of the device control is achieved using IOCTL commands listed below.

Note : Due to the limitations of a 7 segment display some characters cannot be
       displayed.

For a worked example see exStbLED

IOCTLs
------

SAA1064_IOCTL_SET_SCROLLING_ENABLE    : Enable / disable scrolling
SAA1064_IOCTL_GET_SCROLLING_ENABLE    : Get the scrolling mode
SAA1064_IOCTL_SET_SCROLLING_DIRECTION : Set the scrolling direction
SAA1064_IOCTL_GET_SCROLLING_DIRECTION : Get the scrolling direction
SAA1064_IOCTL_SET_SCROLLING_DELAY     : Set the scrolling delay
SAA1064_IOCTL_GET_SCROLLING_DELAY     : Get the scrolling delay
SAA1064_IOCTL_SET_DISPLAY_BRIGHTNESS  : Set the display brightness
SAA1064_IOCTL_GET_DISPLAY_BRIGHTNESS  : Get the display brightness

Associated files
----------------

comps/saa1064/inc/saa1064.h
apps/exStbLED/src/exStbLED.c