at91sam9263 ATMEL Corporation, at91sam9263 Datasheet - Page 921

• Manufacturer Part Number: at91sam9263
• Description: At91 Arm Thumb Microcontrollers
• Manufacturer: ATMEL Corporation

44.3.1.1
Figure 44-2. Absolute Line Draw From (2,0) to (5,0)
6249D–ATARM–20-Dec-07
Line Draw Modes
Line Draw
(0,0)
(0,4)
Lines can be drawn up to a specific width scalable from 1 to 16 pixels. They can also be drawn
as a broken line with a pattern set by a 16-bit pattern register.
The following registers need to be programmed by the software to start a line draw:
LTB bit in 2DGC_GSR will signal the completion of the drawing operation.
First pixel position on the line is the pixel position loaded into source/begin x and source/begin y
registers. Last pixel position on the line is the pixel position loaded into target/end x and tar-
get/end y registers.
First pixel position on the line is the pixel position loaded into source/begin x and source/begin y
registers. Last pixel position on the line is the pixel position loaded into target/end x and tar-
get/end y registers plus the start pixel position loaded into source/begin x and source/begin y
registers. The target/end x and target/end y registers stand for the length of the line to be drawn.
Y
• 2DGC_SBXR: Starting position in pixel units on X-axis.
• 2DGC_TEXR: Ending position in pixel units on X-axis.
• 2DGC_SBYR: Starting position in pixel units on Y-axis.
• 2DGC_TEYR: Ending position in pixel units on Y-axis.
• 2DGC_LOR: Set LOC bitfield to select logic operation MOV.
• 2DGC_CSR: Set CLR[3:0] bitfield to select a color.
• 2DGC_GOR: Set GOC bitfield and OP bitfields to the to select the following values.
• 2DGC_LWR: Set LWD bitfield to select line width in pixels.
• 2DGC_LPR: Set LPT bitfield to select a pattern for the line. 0xFFFF is for solid.
• Absolute Line Draw
• Relative Line Draw
– Set GOC[7:4] to select line draw.
– Set OP[0] to select a 1D or 2D line draw.
– Set OP[1] to select update X & Y or no update X & Y.
– Set OP[2] to select relative or absolute.
– Set OP[3] to select no transformation.
2,0
3,0
DISPLAY
4,0
X
5,0
AT91SAM9263 Preliminary
(9,0)
(9,4)
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