RAM 4.5 BUX II Series Bedienungsanleitung PDF herunterladen (Seite 24)

DE1 User Manual

You can display any image file by loading it into the SRAM chip or into an M4K memory block in

the Cyclone II chip. This requires generating a bitmap file, which may be done as follows:

1. Load the desired image into an image processing tool, such as Corel PhotoPaint.

2. Resample the original image to have a 640 x 480 resolution. Save the modified image in

the Windows Bitmap format.

3. Execute DE1_control_panel\ImgConv.exe, an image conversion tool developed for the

DE1 board, to reach the window in Figure 3.13.

4. Click on the Open Bitmap button and select the 640 x 480 Grayscale photo for

conversion.

5. When the processing of the file is completed, click on the Save Raw Data button and a file

named Raw_Data_Gray.dat will be generated and stored in the same directory as the

original image file. You can change the file name prefix from Raw_Data to another name

by changing the File Name field in the displayed window.

6. Raw_Data_Gray.dat is the raw data that can be downloaded directly into the SRAM on the

DE1 board and displayed on the VGA monitor using the VGA controller IP described in

the DE1_USB_API project.

7. The ImgConv tool will also generate Raw_Data_BW.dat (and its corresponding TXT

format) for the black and white version of the image – the threshold for judging black or

white level is defined in the BW Threshold.

Figure 3.13. The image converter window.

1 2 ... 19 20 21 22 23 24 25 26 27 28 29 ... 55 56

Keine Kommentare

RAM 4.5 BUX II Series Bedienungsanleitung Seite 24