Altera Cyclone II FPGA Starter User Manual download pdf (Page 38)

4–16 Altera Corporation

Cyclone II FPGA Starter Development Kit User Guide October 2006

VGA Display

6. Download the Raw_Data_Gray.dat file into the SRAM as described

in “Displaying Another Image from a Downloaded Bitmap File” on

page 4–12.

The ImgConv tool also generates a Raw_Data_BW.dat file (and its

corresponding TXT format) for the black and white version of the image.

The BW Threshold in Table 4–1 defines the threshold for judging black or

white level. Raw_Data_BW.txt fills in the MIF/Intel Hex format for M4K

SRAM.

Table 4–1. BW Threshold

Image Source R/G/B Band Filter

B&W Threshold

Filter

Output Result

(640x480)

Color Picture R/G/B N/A Raw_Data_Gray

Color Picture R/G/B (optional) BW Threshold Raw_Data_BW +

Raw_Data_BW.txt

Grayscale Picture N/A N/A Raw_Data_Gray

Grayscale Picture N/A BW Threshold Raw_Data_BW +

Raw_Data_BW.txt

1 2 ... 33 34 35 36 37 38 39 40 41 42 43 ... 49 50

No comments

Altera Cyclone II FPGA Starter User Manual Page 38