11 years, 4 months ago.

problem with vga display?

i want to display a monochrome image using mbed. but lcd is not showing anything.

#include "mbed.h"
DigitalOut vs(p14);
DigitalOut hs(p15);
//DigitalOut r(p5);
DigitalOut g(p6);
DigitalOut b(p7);
AnalogOut r(p18);
unsigned char a[640][480];
int main()
{
while(1)
{
vs=1;
hs=1;
wait(0.00001585);
vs=0;
hs=0;
wait(0.00001585);
hs=1;
wait(0.00001585);
hs=0;
wait(0.00001585);
vs=1;
hs=1;
for(int i=0;i<=480;i++)
{

for(int j=0;j<=640;j++)
{
r=0.21;
g=0;
b=0;

}
hs=0;
wait(0.0000317);
hs=1;

}

}
}
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