LCD CODE FOR PORT1
#include <msp430.h>
#define DR P1OUT = P1OUT | BIT4 // define RS high
#define CWR P1OUT = P1OUT & (~BIT4) // define RS low
#define READ P1OUT = P1OUT | BIT5 // define Read signal R/W = 1 for reading
#define WRITE P1OUT = P1OUT & (~BIT5) // define Write signal R/W = 0 for writing
#define ENABLE_HIGH P1OUT = P1OUT | BIT6 // define Enable high signal
#define ENABLE_LOW P1OUT = P1OUT & (~BIT6) // define Enable Low signal
unsigned int i;
unsigned int j;
void delay(unsigned int k)
{
for(j=0;j<=k;j++)
{
for(i=0;i<100;i++);
}
}
void data_write(void)
{
ENABLE_HIGH;
delay(2);
ENABLE_LOW;
}
void data_read(void)
{
ENABLE_LOW;
delay(2);
ENABLE_HIGH;
}
void check_busy(void)
{
P1DIR &= ~(BIT3); // make P1.3 as input
while((P1IN&BIT3)==1)
{
data_read();
}
P1DIR |= BIT3; // make P1.3 as output
}
void send_command(unsigned char cmd)
{
check_busy();
WRITE;
CWR;
P1OUT = (P1OUT & 0xF0)|((cmd>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P1OUT = (P1OUT & 0xF0)|(cmd & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_data(unsigned char data)
{
check_busy();
WRITE;
DR;
P1OUT = (P1OUT & 0xF0)|((data>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P1OUT = (P1OUT & 0xF0)|(data & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_string(char *s)
{
while(*s)
{
send_data(*s);
s++;
}
}
void lcd_init(void)
{
P1DIR |= 0xFF;
P1OUT &= 0x00;
send_command(0x33);
send_command(0x32);
send_command(0x28); // 4 bit mode
send_command(0x0E); // clear the screen
send_command(0x01); // display on cursor on
send_command(0x06); // increment cursor
send_command(0x80); // row 1 column 1
}
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
lcd_init();
send_string("1234");
send_command(0xC0);
send_string("5678");
while(1){}
}
LCD CODE FOR PORT 2
#include <msp430.h>
#define DR P2OUT = P2OUT | BIT4 // define RS high
#define CWR P2OUT = P2OUT & (~BIT4) // define RS low
#define READ P2OUT = P2OUT | BIT5 // define Read signal R/W = 1 for reading
#define WRITE P2OUT = P2OUT & (~BIT5) // define Write signal R/W = 0 for writing
#define ENABLE_HIGH P2OUT = P2OUT | BIT6 // define Enable high signal
#define ENABLE_LOW P2OUT = P2OUT & (~BIT6) // define Enable Low signal
unsigned int i;
unsigned int j;
void delay(unsigned int k)
{
for(j=0;j<=k;j++)
{
for(i=0;i<100;i++);
}
}
void data_write(void)
{
ENABLE_HIGH;
delay(2);
ENABLE_LOW;
}
void data_read(void)
{
ENABLE_LOW;
delay(2);
ENABLE_HIGH;
}
void check_busy(void)
{
P2DIR &= ~(BIT3); // make P2.3 as input
while((P2IN&BIT3)==1)
{
data_read();
}
P2DIR |= BIT3; // make P2.3 as output
}
void send_command(unsigned char cmd)
{
check_busy();
WRITE;
CWR;
P2OUT = (P2OUT & 0xF0)|((cmd>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P2OUT = (P2OUT & 0xF0)|(cmd & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_data(unsigned char data)
{
check_busy();
WRITE;
DR;
P2OUT = (P2OUT & 0xF0)|((data>>4) & 0x0F); // send higher nibble
data_write(); // give enable trigger
P2OUT = (P2OUT & 0xF0)|(data & 0x0F); // send lower nibble
data_write(); // give enable trigger
}
void send_string(char *s)
{
while(*s)
{
send_data(*s);
s++;
}
}
void lcd_init(void)
{
P2DIR |= 0xFF;
P2OUT &= 0x00;
send_command(0x33);
send_command(0x32);
send_command(0x28); // 4 bit mode
send_command(0x0E); // clear the screen
send_command(0x01); // display on cursor on
send_command(0x06); // increment cursor
send_command(0x80); // row 1 column 1
}
void main(void)
{
WDTCTL = WDTPW + WDTHOLD; // stop watchdog timer
lcd_init();
send_string("1234");
send_command(0xC0);
send_string("5678");
while(1){}
}
I tested both codes on my design msp430f5529 board. code with port1 working fine and lcd shows character as written in "send_string()" function. but when i used port2 for same then desire data not appear on lcd.
i could not solve above problem.
