I've done a lot of research and found some usefull info:
1. Full 5725 registers definition(
http://electronix.ru/forum/index.php...post&p=1298514)
2. 5725 programming guide
http://img.docin.com/players/DocinVi...ile.vonibo.com
So we have all possible information about 5725 and can do whatever we need with this chip.
But there is a small problem with MYSON MTV230M... It can be programmed via ISP
only with firmware support.
So custom firmware developement is a complicated task because one wrong move and MTV230 is locked.
Here is the datasheet
http://www.keil.com/dd/docs/datashts/myson/mtv230m.pdf
On page 16
Quote:
The two Flash memories (OSD Flash and Code Flash) can be programmed by a specific WRITER in parallel
mode, or by IIC Host in serial mode while the system is working
|
As you can see there is some parallel WRITER! And we need it!
But i can't find any info about this WRITER
May be you guis have some ideas?
We can use any popular controller(or even rasp.PI) to configure 5725 but i like MTV230M!
It can draw OSD and it is already on board! We need to develop custom firmware with extended OSD options and then anyone can update it via ISP mode and be happy with GBS8200.
The only one problem is MTV230M parallel programmer needed during firmware development!
Add:
Found two programmers. both are VERY expensive for me
http://www.keil.com/dd/chip/3272.htm
Add2:
LabTool-48UXP supports MTV230M in ~$350 with shipment in Russia
Add2:
http://www.aliexpress.com/item/Free-...984434156.html