16x2 lcd 4 bit interfacing with lpc2148 on proteus

[Naman100]

Hi everyone,
I am trying to run 16x2 lcd with lpc 2148 on proteus.I was successful in running the lcd when i used 8 bit mode but when im using 4 bit mode,nothing is getting displayed on the lcd except moving cursor..Please help.Thanx in advance..

Im posting my code below..

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Code C++ - [expand]
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#include <LPC214x.h>
 
void cmd(unsigned char d);
void datal(unsigned char t);
void delay (int count);
 
int main()
{
int i;
unsigned char name[]={"Naman"};
 
IO0DIR=0x0003F400;                      //0b0000 0000 0000 0011 1111 0100 0000 0000
delay(100);
 
cmd(0x28);
cmd(0x01);
cmd(0x02);
cmd(0x06);
cmd(0x0e);
 
for (i=0;i<5;i++)
{
datal(name[i]);
}
while(1);
}
 
void cmd(unsigned char d)
{
int a=0;
a=(d>>4) & 0x0F;
a=a<<14;
 
IO0CLR = 0x00003000;
IO0SET = 0x00000400;
IO0CLR = 0x0003C000;
IO0SET = a;
delay(1000);
IO0CLR = 0x00000400;
 
a=d & 0x0F;
a=a<<14;
 
IO0CLR = 0x00003000;
IO0SET = 0x00000400;
IO0CLR = 0x0003C000;
IO0SET = a;
delay(1000);
IO0CLR = 0x00000400;
}
void datal(unsigned char t)
{
int b=0;
b= (t>>4)&0x0F;
b=b<<14;
 
IO0SET = 0x00002400;
IO0CLR = 0x0003C000;
IO0SET = b;
delay(1000);
IO0CLR = 0x00000400;
 
b=t&0x0F;
b=b<<14;
 
IO0SET = 0x00002400;
IO0CLR = 0x0003C000;
IO0SET = b;
delay(1000);
IO0CLR = 0x00000400;
}
void delay(int count)
{
int j=0, i=0;
for (j=0;j<count;j++)
for (i=0;i<35;i++);
}

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[john blue]

Try to look for the 4bit LCD power up sequence. It is a bit different from 8 bit

 

[Naman100]

It is working now..
d problem was that cmd(0x02) should be written before cmd(0x28).
Thank you,
Naman