Forums

VGA signals

Started by Gopalakrishnan July 18, 2006
Hello
I want to generate vga signals using the lpc2124.I went through the
signal specs and generated the signal.I tested it with an oscilloscope
and it was working fine.I connected it to samtron 56v.But there is
no output on the monitor and led blinking in the monitor shows its in
standby mode.I am using Winarm to compile the program.I am using the
noPC project as a guide in this effort.Can anybody help me with some
code to just fill up the screen with lines etc so that i can test
basic features of circuit.
Regards
Gopalakrishnan.N

An Engineer's Guide to the LPC2100 Series

Gopalakrishnan wrote:
> Hello
> I want to generate vga signals using the lpc2124.I went through the
> signal specs and generated the signal.I tested it with an oscilloscope
> and it was working fine.I connected it to samtron 56v.But there is
> no output on the monitor and led blinking in the monitor shows its in
> standby mode.I am using Winarm to compile the program.I am using the
> noPC project as a guide in this effort.Can anybody help me with some
> code to just fill up the screen with lines etc so that i can test
> basic features of circuit.
> Regards
> Gopalakrishnan.N

As long as your hsync and vsync timing is correct the monitor should
come out of standby. What frequency is the CPU running at?
*Peter*

Thanks peter for pointing out the mistake
Yes you were right the timing was not proper.Since i do not have
oscilloscope it was damn tough to debug.
Regards
Gopalakrishnan.N
--- In l..., Peter Jakacki wrote:
>
> Gopalakrishnan wrote:
> > Hello
> > I want to generate vga signals using the lpc2124.I went through the
> > signal specs and generated the signal.I tested it with an oscilloscope
> > and it was working fine.I connected it to samtron 56v.But there is
> > no output on the monitor and led blinking in the monitor shows its in
> > standby mode.I am using Winarm to compile the program.I am using the
> > noPC project as a guide in this effort.Can anybody help me with some
> > code to just fill up the screen with lines etc so that i can test
> > basic features of circuit.
> > Regards
> > Gopalakrishnan.N
>
> As long as your hsync and vsync timing is correct the monitor should
> come out of standby. What frequency is the CPU running at?
> *Peter*
>