 |
 |
| View previous topic :: View next topic |
| Author |
Message |
neverlog
Joined: 02 May 2010
Posts: 36
|
| Please help! Can't manipulate array store in PIC |
 Posted: Mon Jul 19, 2010 5:36 am |
 |
|
Dear All,
I would appreciate any help from you guys. I am stucked!
Below is my code for PIC, my compiler is 4.104
I am using 18F4520, I was wondering why I can't manipulate the array which I get from software UART.
| Code: |
#include <18F4520.h>
#fuses hs,noprotect,nowdt,nolvp,BROWNOUT
#device HIGH_INTS=TRUE
#priority int_ext,int_rda
#use delay(clock=20000000) //20mhz
#use rs232(baud=19200, xmit=PIN_B1, rcv=PIN_B0, parity=N, bits=8, stream=reader, TIMEOUT=200, errors,SAMPLE_EARLY)
#use rs232(baud=19200, xmit=PIN_C6, rcv=PIN_C7, parity=N, bits=8, errors,stream=pc, TIMEOUT=200,SAMPLE_EARLY)
//EEPROM Storage for Card ID===================================
#define EEPROM_SDA PIN_C4
#define EEPROM_SCL PIN_C3
#include <24256.c>
#include <external_eeprom.c>
#byte porta=5
#byte portb=6
#byte portc=7
//Software UART RX Buffer================================================
#define SU_BUFFER_SIZE 200
BYTE SU_buffer[SU_BUFFER_SIZE];
BYTE SU_next_in = 0;
BYTE SU_next_out = 0;
#int_ext high
void SU_serial_isr() {
int SU_t;
SU_buffer[SU_next_in]=fgetc(reader);
SU_t=SU_next_in;
SU_next_in=(SU_next_in+1) % SU_BUFFER_SIZE;
if(SU_next_in==SU_next_out)
SU_next_in=SU_t; // Buffer full !!
}
#define SU_bkbhit (SU_next_in!=SU_next_out)
BYTE SU_bgetc() {
BYTE SU_c;
while(!SU_bkbhit) ;
SU_c=SU_buffer[SU_next_out];
SU_next_out=(SU_next_out+1) % SU_BUFFER_SIZE;
return(SU_c);
}
//Inventory 16 Slot function==========================================
void inventory(){
fputc(0x40,reader); //Header
delay_ms(1);
fputc(0x0C,reader); //LEN
delay_ms(1);
fputc(0x00,reader);
delay_ms(1);
fputc(0x01,reader); //Command
delay_ms(1);
fputc(0x06,reader); //Flag For 16 slot=0x06; 1 slot=0x26
delay_ms(1);
fputc(0x00,reader); //mask length
delay_ms(1);
fputc(0x00,reader); //AFI
delay_ms(1);
fputc(0x00,reader); //Mask Value1
delay_ms(1);
fputc(0x00,reader); //Mask Value2
delay_ms(1);
fputc(0x00,reader); //Mask Value3
delay_ms(1);
fputc(0x00,reader); //Mask Value4
delay_ms(1);
fputc(0x00,reader); //Mask Value5
delay_ms(1);
fputc(0x00,reader); //Mask Value6
delay_ms(1);
fputc(0x00,reader); //Mask Value7
delay_ms(1);
fputc(0x00,reader); //Mask Value8
delay_ms(1);
fputc(0x0B,reader); //BCC
delay_ms(1);
}
//RF On
void rf_on(){
fputc(0x40,reader);
delay_ms(1);
fputc(0x02,reader);
delay_ms(1);
fputc(0x00,reader);
delay_ms(1);
fputc(0x41,reader);
delay_ms(1);
fputc(0x01,reader);
delay_ms(1);
fputc(0x42,reader);
//delay_ms(50);
}
//main program================================================
#pragma zero_ram //clear all register memory
void main() {
unsigned int32 i;
unsigned int32 len; //data length
unsigned int32 j; //memory address
unsigned int32 k; //Fix Number of id set
unsigned int32 m; //for use in combining bytes
unsigned int32 a; //to work in 16 slot
char return_char[200]; //character return from DUR300
char RF_char[10];
char answer; //User Command
unsigned int32 combine1; //initialize UID first 32bits
unsigned int32 combine2; //initialize UID second 32bits
set_tris_a(0x00);
set_tris_b(0x00000001);
set_tris_c(0b10000000);
output_low(pin_a0); //Starting Buzzer and LED
output_low(pin_a1);
output_low(pin_B6);
output_low(pin_B7);
port_b_pullups(TRUE);
ext_int_edge(H_to_L);
enable_interrupts(global);
enable_interrupts(int_ext);
delay_ms(1000);
fprintf(pc,"\r\n\Test 27 Slot_16 Running...Initializing ...\r\n");
delay_ms(100);
//RF ON Command=========================================
rf_on();
while(SU_bgetc()!=0x40); //clear all rubbish
for (i=0;i<4;i++) { //Reader will return 5 bytes
rf_char[i]=SU_bgetc();
fprintf(pc,"%02X", RF_char[i]);
}
//16 Slot Scanning==========================
do{
inventory();
for (i=0;i<3;i++) { //3 byte for header + length
return_char[i]=SU_bgetc();
fprintf(pc,"%02X", return_char[i]);
}
len=return_char[1];
//Store All len data into array return_char[i]===============
i=3;
do{
return_char[i]=SU_bgetc();
fprintf(pc,"%02X", return_char[i]);
i++;
}while((i<(len+4)));
//if got tag==(I wonder why the program skip process the code below)==
if(len>18){
j=4;
while(j<(len+5)){
combine1=0; //initialize UID first 32bits
combine2=0; //initialize UID second 32bits
if(return_char[j]==0x30){
output_high(pin_B7); // LED indicate Busy
for((a=j+2);a<(j+6);a++){ //loop for first 32bit data
combine1=(combine1<<8)|return_char[a];
}
for((a=i+6);a<(i+10);a++){
combine2=(combine2<<8)|return_char[a];
}
j=j+10;
fprintf(pc,"%LX %LX \r\n",combine1,combine2);
}
else j=j+1;
}
} else fprintf(pc,"No Tags!!\r\n ");
} while (true);
} |
Last edited by neverlog on Mon Jul 19, 2010 5:55 am; edited 4 times in total |
|
 |
neverlog
Joined: 02 May 2010
Posts: 36
|
|
| Posted: Mon Jul 19, 2010 5:42 am |
|
|
After I have send the Inventory() Command to the reader, it will return a string of bytes with size of _len_ which contain multiple tag ID which need to chop off by user(The code is under 16 slot scanning), I was wonder is there any limitation on the compiler or is it my programming problem.
When I stored all the bytes into the array, and I try to manipulate but no success. Can anyone please help me? Thank you very much.
Note: the code which causing the problem is marked as comment :
//if got tag==============================
Last edited by neverlog on Mon Jul 19, 2010 5:47 am; edited 2 times in total |
|
|
FvM
Joined: 27 Aug 2008
Posts: 2337
Location: Germany
|
|
| Posted: Mon Jul 19, 2010 5:43 am |
|
|
Seems like you forgot to mention the actual problem with your code.
P.S.: I fear, it's not much clearer from your second post. |
|
|
neverlog
Joined: 02 May 2010
Posts: 36
|
|
| Posted: Mon Jul 19, 2010 5:59 am |
|
|
Please guys, I really need your help.
Please let me know which part you don't understand. Thank you.
The program din't process the code which mark as comment:
//if got tag==(I wonder why the program skip process the code below)== |
|
|
ckielstra
Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands
|
|
| Posted: Mon Jul 19, 2010 11:20 am |
|
|
| Code: | //if got tag==(I wonder why the program skip process the code below)==
if(len>18){ |
Well,... len must be <= 18.
I guess that's not the answer you were looking for but it is the best we can give you right now because you didn't show us the result of the header bytes printout.
You can not always rely on the people in this forum to find your problem. We don't have your hardware so it is difficult to see the data going into your system and how this misbehaves.
Debugging is just like any other workmanship: you need the right tools for the job. For debugging that is one of the following:
1) Best is to debug on the real hardware with an In Circuit Debugger, this allows you to go through the code in single steps and examine all variables. Several models exist, starting around US $25 (Microchip ICD2, ICD3, PicKit3, one of the CCS tools or a no brand clone).
2) A cheaper option is to do the debugging in the free Microchip MPLAB included Simulator but then you have to simulate the external reader hardware.
3) Cheapest but less flexible is the good old 'printf' debugging. In your program you insert printf commands at the locations where you think things re going wrong. Then when you see the program never reaches one execution point you narrow down here by adding even more printf commands. |
|
|
neverlog
Joined: 02 May 2010
Posts: 36
|
|
| Posted: Mon Jul 19, 2010 8:02 pm |
|
|
| ckielstra wrote: |
Debugging is just like any other workmanship: you need the right tools for the job. For debugging that is one of the following:
1) Best is to debug on the real hardware with an In Circuit Debugger, this allows you to go through the code in single steps and examine all variables. Several models exist, starting around US $25 (Microchip ICD2, ICD3, PicKit3, one of the CCS tools or a no brand clone).
2) A cheaper option is to do the debugging in the free Microchip MPLAB included Simulator but then you have to simulate the external reader hardware.
3) Cheapest but less flexible is the good old 'printf' debugging. In your program you insert printf commands at the locations where you think things re going wrong. Then when you see the program never reaches one execution point you narrow down here by adding even more printf commands. |
Hi ckielstra,
Thank you very much. I really appreciate your guide and advice.
It did help a lot.
Once again, thank you and have a nice day!
Regards,
neverlog |
|
|
|
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
|
Powered by phpBB © 2001, 2005 phpBB Group
|
FAQ 
Search
Register
Profile 
Log in to check your private messages 
Log in
