Hi Fazal,
Id have thought the frame rate depends on many things. If the LCD can
display at the same time it is being updated, and all the data is
preprepared, the maximum frame-rate should simply be a matter of
calculating the inverse of (the number of words to be transferred x the
time to transfer a word) i.e. the time to update a frame. However if you
need to do some work calculating the frame, this also needs to be added
to the denominator in the calculation.
i.e. Frame Rate = 1 / (T1 + T2 + T3 + T4...)
Where
T1 is the calculation time
T2 is the transfer time
T3, T4 is any other time that need to be considered (Maybe in the LCD
specs).
Nick
fazal.usicmku wrote:
>
> I have tried to find the LPC2478 possible frame rate through user
> manual and NXP support. Both gives nothing.
>
> Any of members already done video stream or image display system on
> LPC2478...
>
> Any references or sample codes are welcome.
>
> Faz
>
> --- In l... ,
> Gurkan Karakus wrote:
> >
> >
> >
> > I dont know your lcd controllers refresh rate but since your camera
> output is jpeg coded, you will have to decode jpeg camera outputs
> first. Decoding jpeg takes a lot of cpu time...
> >
> > Gurkan
> >
> >
> >
> >
> > To: l...
> > From: fazal.usicmku@...
> > Date: Thu, 25 Mar 2010 07:34:42 +0000
> > Subject: [lpc2000] Re: LPC2478 + Innolux LCD
> >
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> > Per frame is 200 x 100 Res and 20 frames per second. Why this is not
> possible?
> >
> >
> >
> > what is the maximum frame rate for LPC2478 LCD controller?
> >
> >
> >
> > --- In l... ,
> Gurkan Karakus wrote:
> >
> > >
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> > >
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> > > Hi,
> >
> > >
> >
> > > I dont think you can reach that frame rate with lpc2478.
> >
> > > You may think of lcd driver controller with jpeg decoders(like
> http://www.solomon-systech.com ).
> >
> > >
> >
> > > Gurkan
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> > > To: l...
> >
> > > From: fazal.usicmku@
> >
> > > Date: Thu, 25 Mar 2010 06:20:18 +0000
> >
> > > Subject: [lpc2000] Re: LPC2478 + Innolux LCD
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> > > Thanks for your reply.
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> > > Now i am moving next step,, :-)
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> > > My next step is display the video stream (20 frames per second)
> over LPC2478 and LCD.
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> > > Can you give me some points to get it work.
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> > > Sorry to post such thing here. But I am new in embedded systems... :-)
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> > > Faz
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> > > --- In l... ,
> "rtstofer" wrote:
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> > > > --- In l...
> , "fazal.usicmku"
> wrote:
> >
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> > > > > Thanks for your replies.
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> > > > > Its okay about bmp images. How I can try for comprised image
> data? Actually my application camera module outputs compressed or
> uncompressed JPG format only.
> >
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> > > > > Any suggestions are welcome.
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> > > > > faz
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> > > > Google for 'jpeg decompression algorithm c code' and you
should
> find something.
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> >
> > > > Google for 'jpeg file format' and you might get:
> >
> > >
> >
> > > > http://www.jpeg.org/public/jfif.pdf
>
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> >
> > > > Richard
> >
> > >
> >
> > > >
> >
> > >
> >
LPC2478 + Innolux LCD
Started by ●March 23, 2010
