Search found 15 matches

by IsoPasi
Wed 2017-07-05 8:55
Forum: VS23S010 Forum
Topic: Applications for direct DAC mode
Replies: 1
Views: 527

Re: Applications for direct DAC mode

Direct DAC mode of VS23 is a basic 8-bit DAC mode. The idea was to bypass the video modulation logic and give a possibility use the existing hardware as a simple current-mode DAC for some application. All the applications you have suggested are possible. For the 3rd application it is just like you w...
by IsoPasi
Tue 2016-02-09 11:20
Forum: VS23S010 Forum
Topic: PAL Video Example
Replies: 8
Views: 3813

Re: VS23S010 PAL Video Example

Hello,

Here is shown as an example a PAL picture, which has a color palette, where there are plenty of darker and lighter colors. Also all basic colors are shown in this palette. Color burst value is 0xc4.
pal14.JPG
pal14.JPG (114.94 KiB) Viewed 3322 times
Best regards,
Pasi
by IsoPasi
Wed 2016-02-03 9:46
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

Re: NTSC Video Example

Thanks for great questions and answers. What happens to the state of the parallel port lines while the SPI mode is enabled? Do these lines go Z state? We have wired the microcontroller hardware SPI to the same parallel port lines that it needs, and enable/disable those lines with the state of the XC...
by IsoPasi
Tue 2016-02-02 11:53
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

Re: NTSC Video Example

Have you read the Chapter 6.2 of the datasheet that covers the operation of Video Display Controller? There are covered the main topics of the block and it should be quite helpful. Is it possible to display 320x240 or 160x120 on a NTSC display without the bottom being cut off? NTSC has 480 visible l...
by IsoPasi
Mon 2016-02-01 17:13
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

Re: NTSC Video Example

In this example are shown how the colors of the image can be changed using different microcode programs. In the previous NTSC video images the microcode was B22 A22 Y44 N10: - Pick two bits of B, shift two B22 - Pick two bits of A, shift two A22 - Pick four bits of Y, shift four Y44 - Do nothing N10...
by IsoPasi
Mon 2016-02-01 14:48
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

Re: NTSC Video Example

Hello, Following are images where different NTSC burst values are tried. In the original NTSC example image color burst value is b5h (4-bits of U and V) and the blank value is 37h (8 bits of Y) for protoline data. In the following image the color burst value and thus its amplitude are decremented to...
by IsoPasi
Mon 2016-02-01 13:17
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

Re: NTSC Video Example

Hi, In the following images are shown NTSC video using smaller picture area. In both examples top right part of image that was in previous message is shown. The picture area is 160x120 pixels. The change to previous SW is that #define XPIXELS is changed to 160 and #define YPIXELS is changed to 120. ...
by IsoPasi
Mon 2016-02-01 12:49
Forum: VS23S010 Forum
Topic: NTSC Video Example
Replies: 13
Views: 3862

NTSC Video Example

Dear VSDSP Forum Users, Here is a SW example for setting up the VS23S010 video display controller in NTSC video mode. This example is pretty similar to PAL example. Again a picture containing 256 boxes of different colors is generated. The hardware setup for generating the video picture is the same ...
by IsoPasi
Fri 2016-01-29 8:34
Forum: VS23S010 Forum
Topic: Where to buy VS23S010-L? How to make NTSC picture?
Replies: 7
Views: 2360

Re: Where to buy VS23S010-L?

The NTSC video example will be added next week.

Best regards,
Pasi
by IsoPasi
Tue 2015-12-08 10:33
Forum: VS23S010 Forum
Topic: PAL Video Example
Replies: 8
Views: 3813

Re: VS23S010 PAL Video Example

The following picture is a gray-scale image, where all 256 levels of gray of a 8-bit pixel in the picture area are shown. The program picks only Y: - pick 8 bits for Y, shift 2 bits - pick nothing, shift 6 bits - do nothing twice This microcode program uses the last A and B values of the protoline b...