Problem with OSHONsoft pic18f simulator

hello all,

As a part of my project I am using 16X2 LCD interfaced with pic18f2220. I wrote the code asusual and simulated in MPLAB simulator. It works fine. But, when I load the HEX file in the OSHONsoft pic18f simulator, it says STACK UNDERFLOW and stops.

When I dig the code and what I found was, the parameters are not passing properly to functions. I didnot check the code in the hardware, but confused with this error. Even I loaded the existing code for LCD in C18 compiler.. same error.

can anyone help..?

any suggestion will be appreciated... :-|

Can you post the HEX file and I can run it on my simulator

thanx Colbhaidh for your reply..
i m uploading the hex file as wel as my c file.
it works on the MPLAB simulator but not in the pic18f sim.



I cannot upload these files as attachments. I m pasting it below.


file name : lcd.c
MCU: pic18f2220

# include <p18f2221.h>
# include <string.h>

# define lcd_line LATB
# define en LATCbits.LATC4
# define rs LATCbits.LATC5

# define message "SATHYA"


void init_lcd(void);
void init_ports(void);
void cmd(unsigned char cmmd);
void print_letter(unsigned char data);
void delay(void);
void print_str(unsigned char *str);

void init_ports(void)
{
TRISB = 0X00;
TRISC = 0X00;

ADCON1bits.PCFG0 = 1;
ADCON1bits.PCFG1 = 1;
ADCON1bits.PCFG2 = 1;
ADCON1bits.PCFG3 = 1;
}

void init_lcd(void)
{
cmd(0X38);
cmd(0X06);
cmd(0X0F);
cmd(0X01);
}


void cmd(unsigned char cmmd)
{
rs = 0;
lcd_line = cmmd;
en = 1;
delay();
en = 0;
}

void print_letter(unsigned char data)
{
rs = 1;
lcd_line = data;
en = 1;
delay();
en = 0;
}

void delay(void)
{
int i;
for(i=0;i<250;i++);
}

void print_str(unsigned char *str)
{
while(*str!='\0')
{
print_letter(*str);
str = str+1;
}
}

void main()
{
char msg[10] = message;

init_ports();
init_lcd();

print_str(msg);

while(1);
}





I don kno whethe it wil work or not...
bt Im pasting the hex file..
copy it into a notepad and save it as ".hex" pls..




:020000040000FA
:0600000017EF01F01200F1
:020006000000F8
:08000800936A946AC180C18271
:10001000C184C1861200380EE66E0ED8E552060E77
:10002000E66E0AD8E5520F0EE66E06D8E552010ECE
:10003000E66E02D8E5521200D9CFE6FFE1CFD9FF34
:100040008B9AFE0EDB508A6E8B8814D88B98E55203
:10005000E7CFD9FF1200D9CFE6FFE1CFD9FF8B8AD6
:10006000FE0EDB508A6E8B8805D88B98E552E7CF61
:10007000D9FF1200D9CFE6FFE1CFD9FF020EE1266A
:10008000DE6ADD6ADECF02F0DDCF03F0D8900350E8
:1000900004E6FA0E025C000E035805E2DF2A010EA8
:1000A00001E3DB2AEFD7020EE15C02E2E16AE552EE
:1000B000E16EE552E7CFD9FF1200D9CFE6FFE1CFDD
:1000C000D9FFFD0EDBCFE9FFFE0EDBCFEAFFEF50DD
:1000D0001DE0FD0EDBCFE9FFFE0EDBCFEAFFEF50A8
:1000E000E66EB9DFE552010EE76EFD0EDBCF02F0E2
:1000F000FE0EDBCF03F0E7500226000E0322FD0EBA
:1001000002C0DBFFFE0E03C0DBFFDBD7E552E7CF0B
:10011000D9FF1200D9CFE6FFE1CFD9FF0A0EE126C1
:10012000D9CFE9FFDACFEAFF530EEE6E410EEE6E45
:10013000540EEE6E480EEE6E590EEE6E410EEE6EE1
:10014000EE6AEE6AEE6AEE6A5FDF65DFD9CFE6FF40
:10015000DACFE6FFB2DFE552E552FFD70A0EE15CE7
:1001600002E2E16AE552E16EE552E7CFD9FF120003
:10017000060EF66E000EF76E000EF86E0001090016
:10018000F550856F0900F550866F03E1856701D052
:100190003DD00900F550806F0900F550816F0900CE
:1001A000F550826F09000900F550E96E0900F5501D
:1001B000EA6E090009000900F550836F0900F55047
:1001C000846F09000900F6CF87F0F7CF88F0F8CFE9
:1001D00089F080C0F6FF81C0F7FF82C0F8FF000100
:1001E000835302E1845307E00900F550EE6E830764
:1001F000F8E28407F9D787C0F6FF88C0F7FF89C007
:0E020000F8FF00018507000E865BBFD71200D5
:02020E00000EE0
:10021000F36E00EE00F0020E01D81200EA6002D088
:0E022000EE6AFCD7F350E9601200EE6AFCD7DC
:02022E0011EECF
:1002300000F021EE00F0F86A019CB8EC00F025EC2B
:0A02400001F08AEC00F0FBD7120079
:02024A001200A0
:00000001FF

I loaded the HEX file and just ran it on the ONSOFT simulator and it did not give any errors.
I am using the PIC18 Simulator IDE v2.73. I will try run with the ONSOFT LCD simulator but so far, no errors....

---------- Post added at 17:28 ---------- Previous post was at 16:20 ----------

There is a problem around the c code:


void main()
{
char msg[10] = message;

init_ports();
init_lcd();

print_str(msg);

while(1);
}



void print_str(unsigned char *str)
{
while(*str!='\0')
{
print_letter(*str);
str = str+1;
}
}


I only program in assembler, not C, but the disassembly of the above code is wrong.
print_str(msg); in main is passing the wrong memory location for msg to the print_str subroutine.
Can you change the C code to :

void main()
{
unsigned char msg[10] = message;

init_ports();
init_lcd();

print_str(msg);

while(1);
}

and try that.

thnk u Colbhaidh..
i tried that prog in other compilers..
it worked...
i think this is the issue over c18 compiler that doesnt work...
sorry 4 d late reply...