Tool/software: Code Composer Studio
I was trying to interface a 16*2 LCD the Piccolo C2000 launchpad.The code seems to be building but there is no output on the LCD.The Code is
/************************************************************************/
/* LCD Interface - 8 bit mode */
/* */
/* LCD Connection:- */
/* ---------------- */
/* D0 -> GPIO0 */
/* D1 -> GPIO1 */
/* D2 -> GPIO2 */
/* D3 -> GPIO3 */
/* D4 -> GPIO4 */
/* D5 -> GPIO5 */
/* D6 -> GPIO6 */
/* D7 -> GPIO7 */
/* */
/* RS -> GPIO12 */
/* RW -> GND */
/* E -> GPIO19 */
/* */
/* */
/************************************************************************/
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
#include "f2802x_common/include/gpio.h"
#include "f2802x_common/include/pie.h"
#include "f2802x_common/include/clk.h"
#include "f2802x_common/include/flash.h"
#include "f2802x_common/include/pll.h"
#include "f2802x_common/include/pwm.h"
#include "f2802x_common/include/cap.h"
#include "f2802x_common/include/wdog.h"
#include "piccolo_lcd.h"
#include <stdio.h>
#include <string.h>
unsigned char CommandByte;
char LineNumber;
char *Message;
unsigned char DataByte;
unsigned char Value;
void CursorON(void); /* Make Cursor visible */
void CursorOFF(void);
void DisplayLCD(char LineNumber,char *Message); /* Display the given message (16 characters) at given location on LCD */
void WriteCommandLCD(unsigned char CommandByte);
void WriteDataLCD(unsigned char DataByte);
void LCDDelay(void);
void LCDDelay1600(void);
void SendByte(unsigned char Value);
void InitializeLCD(void); /* Initialize LCD */
#define RS GPIO_Number_12
#define E GPIO_Number_19
#define D0 GPIO_Number_0
#define D1 GPIO_Number_1
#define D2 GPIO_Number_2
#define D3 GPIO_Number_3
#define D4 GPIO_Number_4
#define D5 GPIO_Number_5
#define D6 GPIO_Number_6
#define D7 GPIO_Number_7
GPIO_Handle myGpio;
PLL_Handle myPll;
WDOG_Handle myWDog;
CLK_Handle myClk;
void main(void)
{
myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj));
WDOG_disable(myWDog);
myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj));
myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj));
CLK_setOscSrc(myClk, CLK_OscSrc_Internal);
PLL_setup(myPll, PLL_Multiplier_10, PLL_DivideSelect_ClkIn_by_2);
myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj));
GPIO_setMode(myGpio, GPIO_Number_0, GPIO_0_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_0, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_1, GPIO_1_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_1, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_2, GPIO_2_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_2, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_3, GPIO_3_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_3, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_4, GPIO_4_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_4, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_5, GPIO_5_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_5, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_6, GPIO_6_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_6, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_7, GPIO_7_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_7, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_12, GPIO_12_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_12, GPIO_Direction_Output);
GPIO_setMode(myGpio, GPIO_Number_19, GPIO_19_Mode_GeneralPurpose);
GPIO_setDirection(myGpio, GPIO_Number_19, GPIO_Direction_Output);
InitializeLCD();
DisplayLCD("1","abjuryoulpyuport");
}
/* Initializes LCD */
void InitializeLCD(void)
{
GPIO_setLow(myGpio, E);
LCDDelay1600();
LCDDelay1600();
LCDDelay1600();
LCDDelay1600();
WriteCommandLCD(0x38); //Command to select 8 bit interface
LCDDelay1600();
WriteCommandLCD(0x38); //Command to select 8 bit interface
LCDDelay(); //Small delay
WriteCommandLCD(0x38); //Command to select 8 bit interface
LCDDelay();
WriteCommandLCD(0x08); //Command to off cursor,display off
WriteCommandLCD(0x01); //Command to Clear LCD
LCDDelay1600();
WriteCommandLCD(0x06); //Command for setting entry mode
WriteCommandLCD(0x0f); //Command to on cursor,blink cursor
LCDDelay1600();
WriteCommandLCD(0x02); //Command return the cursor to home
LCDDelay1600();
}
/* Writes a command byte to LCD */
void WriteCommandLCD(unsigned char CommandByte)
{
GPIO_setHigh(myGpio, RS); //Clear RS pin to write command
SendByte(CommandByte);
LCDDelay(); //Small delay
}
/* Send a byte of data to LCD */
void SendByte(unsigned char Value)
{
unsigned char temp;
if((Value & 0x01) == 0x01)
GPIO_setLow(myGpio, D0);
else
GPIO_setHigh(myGpio, D0);
if((Value & 0x02) == 0x02)
GPIO_setLow(myGpio, D1);
else
GPIO_setHigh(myGpio, D1);
if((Value & 0x04) == 0x04)
GPIO_setLow(myGpio, D2);
else
GPIO_setHigh(myGpio, D2);
if((Value & 0x08) == 0x08)
GPIO_setLow(myGpio, D3);
else
GPIO_setHigh(myGpio, D3);
if((Value & 0x10) == 0x10)
GPIO_setLow(myGpio, D4);
else
GPIO_setHigh(myGpio, D4);
if((Value & 0x20) == 0x20)
GPIO_setLow(myGpio, D5);
else
GPIO_setHigh(myGpio, D5);
if((Value & 0x40) == 0x40)
GPIO_setLow(myGpio, D6);
else
GPIO_setHigh(myGpio, D6);
if((Value & 0x80) == 0x80)
GPIO_setLow(myGpio, D7);
else
GPIO_setHigh(myGpio, D7);
GPIO_setLow(myGpio, E); //Set E pin to select LCD
for(temp=0;temp<5; temp++);
GPIO_setHigh(myGpio, E); //Clear E pin to deselect LCD
LCDDelay(); //Small delay
}
/* Writes a Data byte to LCD */
void WriteDataLCD(unsigned char DataByte)
{
GPIO_setLow(myGpio, RS); //Set RS pin to 1 to write Data
SendByte(DataByte);
LCDDelay(); //Small delay
}
/* Small delay */
void LCDDelay(void)
{
DELAY_US(50);
}
/* Big delay */
void LCDDelay1600(void)
{
DELAY_US(1600);
}
/* Makes cursor visible */
void CursorON(void)
{
WriteCommandLCD(0x0f); //Command to switch on cursor
}
/* Makes cursor invisible */
void CursorOFF(void)
{
WriteCommandLCD(0x0c); //Command to switch off cursor
}
/* Displays a message on LCD */
void DisplayLCD(char LineNumber,char *Message)
{
int a;
if(LineNumber ==1)
{ //First Line
WriteCommandLCD(0x80); //Select the first line
}
else
{ //Second line
WriteCommandLCD(0xc0); //Select the second line
}
for(a=0;a<16;a++)
{
WriteDataLCD(*Message); //Display a character
Message++; //Increment pointer
}
return;
}
Could Someone please help me Out.
