[ts-7000] LCD program turnsoff network port.

["Art" <>]

It seems when I run my LCD program(isn't quite working yet but will 
compile).  it disables the network port.  the lights on the network 
port stop flashing when I execute the following line.

63:  *LCD_Control = lucCmd|LCD_E;

so far I think I have everything write with the LCD except for 
timmings.  but I need to figure out why it turns off the Network.  I 
am using a TS-7200 board.  I use telnet and ftp to develope.  So now 
to fix this trouble I have to reboot every time I run the LCD 
program.  


Is there a way to reset the network port after it has been turn off?  
from the serial port.   I have tried "ifconfig eth0 restart".  Below 
is the program I am using..



#include<unistd.h>
#include<sys/types.h>
#include<sys/mman.h>
#include<stdio.h>
#include<fcntl.h>
#include<string.h>
#include<time.h>

#define GPIOBASE        0x80840000
//#define MODELBASE       0x22000000
//#define TS7300  0x03
#define PADR    0
#define PADDR   (0x10 / sizeof(unsigned int))
#define PAMASK  0x7F  
#define PCDR    (0x08 / sizeof(unsigned int))
#define PCDDR   (0x18 / sizeof(unsigned int))
#define PCMASK  0x01  
#define PHDR    (0x40 / sizeof(unsigned int))
#define PHDDR   (0x44 / sizeof(unsigned int))

// These delay values are calibrated for the EP9301 
// CPU running at 166 Mhz, but should work also at 200 Mhz
#define SETUP   15
#define PULSE   36
#define HOLD    22

#define COUNTDOWN(x)    asm volatile ( \
  "1:\n"\
  "subs %1, %1, #1;\n"\
  "bne 1b;\n"\
  : "=r" ((x)) : "r" ((x)) \
);

//volatile unsigned int *model_ptr;
//unsigned int model;
volatile unsigned int *gpio;
/*
volatile unsigned int *phdr;
volatile unsigned int *phddr;
volatile unsigned int *pcdr;
volatile unsigned int *pcddr;
volatile unsigned int *padr;
volatile unsigned int *paddr;
*/

void command(unsigned int);
void writechars(unsigned char *);
unsigned int lcdwait(void);
void LCD_SETUP(void);

volatile unsigned char *LCD_Control, *LCD_Control_DR, *LCD_Data, 
*LCD_Data_DR, *GPIOBDB;

#define LCD_E 8
#define LCD_RW 2
#define LCD_RS 4

struct timespec gTime;

void lcdCommand(unsigned char lucCmd, unsigned char lucDataAddress, 
int liWait)
{
  unsigned int lucCount;
  *LCD_Data = lucDataAddress;
  *LCD_Control = lucCmd|LCD_E;
  gTime.tv_sec = 0;
  gTime.tv_nsec = 6400;
  nanosleep(&gTime,NULL);
  *LCD_Control = lucCmd;
  gTime.tv_sec = 0;
  gTime.tv_nsec = 6400;
  nanosleep(&gTime,NULL);
}

void LCD_SETUP(void)
{
        int fd;
        unsigned char *start;
        fd = open("/dev/mem", O_RDWR|O_SYNC);
        start = mmap(0, getpagesize(), 
          PROT_READ|PROT_WRITE, MAP_SHARED, fd, GPIOBASE);
        gpio = (unsigned int *)(start);
        LCD_Control = (unsigned char *)(start + 0x40); // LCD_EN 
LCD_RS LCD_WR
        LCD_Control_DR = (unsigned char *)(start + 0x44); // LCD_EN 
LCD_RS LCD_WR Direction Register
        LCD_Data = (unsigned char *)(start + 0x0); // LCD Data Values
        LCD_Data_DR = (unsigned char *)(start + 0x10); // LCD Data 
Values Direction Register
        //*LCD_Control = 0x38;
        *LCD_Data_DR = 0xff;
        *LCD_Control_DR |= 0x38;
   close(fd);
  gTime.tv_sec = 0;
  gTime.tv_nsec = 20000;
  nanosleep(&gTime,NULL);
  lcdCommand(0,16+32,41);
  gTime.tv_sec = 0;
  gTime.tv_nsec = 4100;
  nanosleep(&gTime,NULL);
  lcdCommand(0,16+32,1);
  gTime.tv_sec = 0;
  gTime.tv_nsec = 100;
  nanosleep(&gTime,NULL);
  lcdCommand(0,16+32,0);
  lcdCommand(0,0x38,0);  // Function Set
  lcdCommand(0,12,0);  // Display On
  lcdCommand(0,1,0);  // Clear Display
  lcdCommand(0,6,5);  // increment   
}

/* This program takes lines from stdin and prints them to the
 * 2 line LCD connected to the TS-7200 LCD header.  e.g
 *
 *    echo "hello world" | lcdmesg
 * 
 * It may need to be tweaked for different size displays
 */

int main(int argc, char **argv) {
        int i = 0;

        LCD_SETUP();
        //*LCD_Data_DR = 0xffffffff;
        //*LCD_Data_DR = 0x0;
        //*LCD_Control_DR |= 0x38;
        //*LCD_Data = 0;
        while (getchar()!=EOF)
        {
        //  *LCD_Data = ~(*LCD_Data);
        //  *LCD_Control = (*LCD_Control)^0x38;
  gTime.tv_sec = 0;
  gTime.tv_nsec = 20000;
  nanosleep(&gTime,NULL);
          //sleep(1);
  *LCD_Control ^= LCD_E;
        }
        *LCD_Data_DR = 0x0;
        *LCD_Control_DR &= ~0x38;
        return 0;
}







 
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