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Honored ContributorNios II Evaluation Board "not responding"
Hi guys, I am using the Nios II IDE to implement some C++ code that controls a VFD on a Nios II Evaluation Board. I've gotten it to work pretty well, it displays whatever I want. However, the FPGA seems to stop operating after 5 to 10 minutes in an infinite while loop. My code is as follows.
#include <stdio.h># include "system.h"# include "altera_avalon_pio_regs.h"# include "string.h"
void chr_wr(int code);
void put_txt(int x,int y,unsigned char *text,int textlen);
void set_position(int x,int y);
void disp_clear(void);
int read_data(void);
void write_data(int dat);
void write_cmd(int cmd);
void wait_ms(long time);
void brightness(int br); //0 for 100%, 1 for 75%, 2 for 50%, 3 for 25%. Must be 2nd instruction after function_set.
void set_udf(int code,int *data);
void init_vfd(void);
void function_set(int bus_width); //1 for 8-bit, 0 for 4-bit. Must be first instruction sent after power-on
void entry_mode_set(int inc_dec, int shift); //1 for inc and 0 for dec, 1 for display shift and 0 for cursor shift
void display_on_off(int display, int cursor, int blinking); //1 for on 0 for off
const int udf={{0x1f,0x11,0x11,0x11,0x11,0x11,0x1f,0x00},
{0x00,0x0e,0x0a,0x0a,0x0a,0x0e,0x00,0x00},
{0x00,0x00,0x04,0x04,0x04,0x00,0x00,0x00},
{0x00,0x0e,0x0a,0x0a,0x0a,0x0e,0x00,0x00}};
int main()
{
int i=0;
printf("VFD Controller Test - Remotec\n");
init_vfd();
put_txt(4,0,"Jason Kientz",12); // text
put_txt(5,1,"= Ballsack",10);
//put_txt(0,0,"ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789-_=+",40);
//put_txt(0,1,"abcdefghijklmnopqrstuvwxyz!@#$%^&*() <>.",40);
set_position(0,0);write_data(0x01); // udf 0x01 in each corner
set_position(0,1);write_data(0x01);
set_position(19,0);write_data(0x01);
set_position(19,1);write_data(0x01);
while(1) // cycle udf's
{
set_udf(0x01,&udf);
wait_ms(100);
i++;
if (i==4)
i=0;
}
//write_cmd(0x3FF);
return 0;
}
/********************************************************************************
*****************/
/* Function descriptions :- */
/* */
/* init_h8 - Sets up H8 port directions */
/* chr_wr - Places a single char at the current ddram location */
/* put_txt - Writes a text string starting at col x,row y */
/* set_position - Sets ddram location (cursor position) to x,y */
/* disp_clear - Clears screen */
/* read_data - Reads data from the module (at current position) */
/* write_data - Sends a data byte (CD low) */
/* write_8bit_data - Sends a data byte with only 1 'e' strobe (CD low) */
/* write_cmd - Sends a command byte (CD high) */
/* write_8bit_cmd - Sends a command byte with only 1 'e' strobe (CD high) */
/* wait_ms - Waits for specified number of milliseconds */
/* brightness - Sets the specified brightness (0-3) */
/* set_udf - Loads data into a single udf char */
/* init_vfd - Initialise VFD */
/* */
/********************************************************************************
*****************/
void chr_wr(int code)
{
write_data(code);
}
void put_txt(int x,int y,unsigned char *text,int textlen)
{
int a;
set_position(x,y);
for(a=0;a<textlen;a++)
{
chr_wr(text); /* write text a character at a time */
}
}
void set_position(int x,int y)
{
write_cmd(0x80+x+0x40*y);
}
void disp_clear(void)
{
write_cmd(0x01);
wait_ms(30);
}
int read_data(void)// MAY NOT WORK - CHECK ON HOW TO WORK WITH BIDIR PINS
{
int result;
write_cmd(0x300);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 1);
result=IORD_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 0);
write_cmd(0x00);
return(result);
}
void write_data(int dat)
{
dat += 0x200;
IOWR_ALTERA_AVALON_PIO_DATA(LCD_PIO_BASE, dat);
IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, dat);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 0);
wait_ms(1);
}
void write_cmd(int cmd)
{
IOWR_ALTERA_AVALON_PIO_DATA(LCD_PIO_BASE, cmd);
IOWR_ALTERA_AVALON_PIO_DATA(LED_PIO_BASE, cmd);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 1);
IOWR_ALTERA_AVALON_PIO_DATA(LCD_E_PIO_BASE, 0);
wait_ms(1);
}
void wait_ms(long time)
{
usleep(time*1000);
}
//0 for 100% brightness, 1 for 75%, 2 for 50%, 3 for 25%
void brightness(int br)
{
int value = 0x200;
if (br == 1) value += 0x01;
else if (br == 2) value += 0x02;
else if (br == 3) value += 0x03;
write_cmd(value);
}
void set_udf(int code,int *data)
{
int a;
write_cmd(0x40+code*8);
for(a=0;a<8;a++)
{
write_data(data);
}
}
void init_vfd(void)
{
function_set(1);
wait_ms(10);
brightness(0);
entry_mode_set(1,0);
display_on_off(1,0,0);
disp_clear();
}
//1 for 8-bit, 0 for 4-bit. Must be first instruction sent after power-on
void function_set(int bus_width)
{
int value = 0x20;
if (bus_width == 1) value += 0x10;
write_cmd(value);
}
//1 for inc and 0 for dec, 1 for display shift and 0 for cursor shift
void entry_mode_set(int inc_dec, int shift)
{
int value = 0x04;
if (inc_dec == 1) value += 0x02;
if (shift == 1) value += 0x01;
write_cmd(value);
}
//1 for on 0 for off
void display_on_off(int display, int cursor, int blinking)
{
int value = 0x08;
if (display == 1) value += 0x04;
if (cursor == 1) value += 0x02;
if (blinking == 1) value += 0x01;
write_cmd(value);
}
/* ************************************************************************* */
/* ***************** 12.Pin Assignment ************** */
/* ***************** 12.1 Signal Connector. ************** */
/*---------------------------------------------------------------------------*/
/* */
/* (parallel# 1 ) 12.1 CU20025ECPB-U1J Signal Connector */
/* */
/*---------------------------------------------------------------------------*/
/* Pin Signal Pin Signal */
/* 1 GND 2 VCC */
/* 3 FNC 4 RS (P66) */
/* 5 RW (P65) 6 E (P64) */
/* 7 D0 8 D1 */
/* 9 D2 10 D3 */
/* 11 D4 (P60) 12 D5 (P61) */
/* 13 D6 (P62) 14 D7 (P63) */
/* */
/* Note : 4 bit mode */
/*****************************************************************************/Using cable "Nios II Evaluation Board ", device 1, instance 0x00
Pausing target processor: not responding.
Resetting and trying again: FAILED
Leaving target processor paused
