Nxp Semiconductors UM10237 用户手册

下载
页码 792
UM10237_2
© NXP B.V. 2008. All rights reserved.
User manual
Rev. 02 — 19 December 2008 
296 of 792
NXP Semiconductors
UM10237
Chapter 12: LPC24XX LCD controller
6.5.6 Cursor image format
The LCD frame buffer supports three packing formats, but the hardware cursor image 
requirement has been simplified to support only LBBP. This is little-endian byte, 
big-endian pixel for Windows CE mode.
The Image RAM start address is offset by 0x800 from the LCD base address, as shown in 
the register description in this chapter.
The displayed cursor coordinate system is expressed in terms of (X,Y). 64 x 64 is an 
extension of the 32 x 32 format shown in 
.
 
32 by 32 pixel format
Four cursors are held in memory, each with the same pixel format. 
 lists the 
base addresses for the four cursors.
 
Fig 39. Cursor image format
Table 254. Addresses for 32 x 32 cursors
Address
Description
0xFFE1 0800
Cursor 0 start address.
0xFFE1 0900
Cursor 1 start address.
0xFFE1 0A00
Cursor 2 start address.
0xFFE1 0B00
Cursor 3 start address.
(31, 0)
(0, 0)
(1, 0)
(2, 0)
(30, 0)
(29, 0)
(31, 1)
(0, 1)
(1, 1)
(2, 1)
(30, 1)
(29, 1)
(31, 2)
(0, 2)
(1, 2)
(2, 2)
(30, 2)
(29, 2)
RIGHT
LEFT
(31, 29)
(0, 29)
(1, 29)
(2, 29)
(30, 29)
(29, 29)
(31, 30)
(0, 30)
(1, 30)
(2, 30)
(30, 30)
(29, 30)
(31, 31)
(0, 31)
(1, 31)
(2, 31)
(30, 31)
(29, 31)
TOP
BOTTOM