Texas Instruments Development Kit for TM4C129x,Tiva™ ARM® Cortex™ -M4 Microcontroller DK-TM4C129X DK-TM4C129X 数据表
产品代码
DK-TM4C129X
Figure 26-14. Example of Subpicture
The subpicture feature is enabled when the
SPEN
control bit in the LCD Raster Subpanel Display
n (LCDRASTRSUBPn) register is set to 1. The
HOLS
bit, when programmed to 0, puts the Default
Pixel Data lines at the top of the screen and the active video lines at the bottom of the screen. When
the
the
HOLS
bit is set to 1, Active video lines are at the top of the screen and Default Pixel Data lines
are at the bottom of the screen. The
HOLS
bit behavior is shown in Figure 26-15 on page 1866.
Figure 26-15. Subpicture Output with HOLS Bit Variations
The
LPPT
(lines per panel threshold) bitfield defines the number of lines at the bottom of the picture
for both HOLS = 1 or 0.
LPPT
is an encoded value in the range {0:2047} used to represent the
number of lines in the range {1:2048}.
26.4
Interrupts
The application can program the LCD controller to trigger an interrupt for the following events:
■ DMA end-of-frame 1: The DMA end-of-frame 1 (
EOF1
) interrupt is triggered when the DMA
module has completed transferring the contents of a bounded frame buffer 1.
■ DMA end-of-frame 0: The DMA end-of-frame 0 (
EOF0
) interrupt is triggered when the DMA
module has completed transferring the contents of a bounded frame buffer 0.
■ DMA palette loaded: When
PALMODE
is set to Palette-only or Palette+data, the palette loaded
interrupt is triggered when the palette portion of the DMA transfer has been stored in the Palette
RAM.
RAM.
December 13, 2013
1866
Texas Instruments-Advance Information
LCD Controller