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EM4150 reading problem

 
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koray_duran



Joined: 04 Feb 2010
Posts: 37

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EM4150 reading problem
PostPosted: Thu Dec 23, 2010 4:03 am     Reply with quote

Hello again,

I have a problem about reading my 4150 tag which I supplied from ccs c rfid development kit. I've some changed the code for my own hardware but the drivers and basic hardware not modified.
I can read 4102 tags, I can login to 4150 and I can write to 4150 (not tested) but I can't read 4150.
The problem I get is : PARITY ERROR

Please give me some idea. Here is my code :
Code:

#include <16F876A.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT,NOPUT
#use delay(clock=20M)
#use rs232(baud=2400,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=RS)

#define  BUZZER      PIN_C4
#define  RS485_EN1   PIN_B4
#define  RS485_EN2   PIN_B5
#define  SENSE       INPUT(PIN_C3)

#include <em4095.c>
#include <em4102.c>
#include <em4150.c>
#include <stdlib.h>

int8 msg[32];
int8 code[5];
int8 rcv_data=0;
int8 err;

typedef enum {OFF, GREEN, RED, BLUE, YELLOW, WHITE} LEDcolor;

// LED Control
void led_control(LEDcolor color) {
   switch(color) {     
      case OFF:
      output_low(PIN_A1);
      output_low(PIN_A0);
      output_low(PIN_A2);
      break;
     
      case GREEN:
      output_low(PIN_A1);
      output_low(PIN_A0);
      output_high(PIN_A2);
      break;
     
      case RED:
      output_high(PIN_A1);
      output_low(PIN_A0);
      output_low(PIN_A2);
      break;
     
      case BLUE:
      output_low(PIN_A1);
      output_high(PIN_A0);
      output_low(PIN_A2);
      break;
     
      case YELLOW:
      output_high(PIN_A1);
      output_low(PIN_A0);
      output_high(PIN_A2);
      break;
     
      case WHITE:
      output_high(PIN_A1);
      output_high(PIN_A0);
      output_high(PIN_A2);
      break;
   }
}

void rs_init(int8 way) {
if(way==0) {
output_low(RS485_EN1);
output_low(RS485_EN2);
}
if(way==1) {
output_high(RS485_EN1);
output_high(RS485_EN2);
delay_ms(25);
}
}

void clear() {
   rs_init(0);
   led_control(GREEN);
   rcv_data=0;
}

#INT_RDA
void receiving_data() {
   rcv_data=getc(RS);
}

void main(void) {

   int32 tagNum=0x00;
   int8  customerCode=0x00;
   int8  tag_adr=0x00; // tag_adr is between 0-33
   
   enable_interrupts(INT_RDA);
   enable_interrupts(GLOBAL);
   
   rf_init();
   //rf_powerUp();
   
   rs_init(0);
   led_control(GREEN);
   
   while(true) {
   
   restart_wdt();
     
      if(rcv_data==0x45) {
      led_control(OFF);
      reset_4150();
      CLEAR();
      }
     
      if(rcv_data==0x4C) {
      led_control(YELLOW);
      rs_init(1);
      err = login_4150(0x00);
      switch(err) {
      case ERR_OK: sprintf(msg,"\n\rOK"); break;
      case ERR_LIW: sprintf(msg,"\n\rLIW"); break;
      case ERR_NAK: sprintf(msg,"\n\rNAK"); break;
      case ERR_PARITY: sprintf(msg,"\n\rPARITY"); break;
      }
      puts(msg,RS);
      CLEAR();
      }
     
      if(rcv_data==0x54) {
      led_control(WHITE);
      rs_init(1);
      if((err = read_4150(msg,tag_adr)) == ERR_OK) {
      tagNum = make32(msg[3], msg[2], msg[1], msg[0]);
      sprintf(msg, "\n\rData: %lu", tagNum);
      }
      switch(err) {
      case ERR_LIW: sprintf(msg,"\n\rLIW"); break;
      case ERR_NAK: sprintf(msg,"\n\rNAK"); break;
      case ERR_PARITY: sprintf(msg,"\n\rPARITY"); break;
      }
      puts(msg,RS);
      CLEAR();
      }

      if(rcv_data==0x52) {
      led_control(BLUE);
      if(read_4102(code)) {
         rs_init(1);
         tagNum = make32(code[1],code[2],code[3],code[4]);
         sprintf(msg,"\r\nScanned ID: %u-%lu",customerCode,tagNum);
         puts(msg,RS);         
         sprintf(msg,"( [%u][%u]",code[0],code[1]);
         puts(msg,RS);
         sprintf(msg,"[%u][%u][%u] )",code[2],code[3],code[4]);
         puts(msg,RS);
         CLEAR();
      }
      }
     
      if(rcv_data==0x57) {
      led_control(RED);
      rs_init(1);
      tagNum = make32(0x01,0x02,0x03,0x04);
      tag_adr=0;
      err = write_4150(tagNum,tag_adr);
      switch(err) {
      case ERR_OK: sprintf(msg,"\n\rOK"); break;
      case ERR_LIW: sprintf(msg,"\n\rLIW"); break;
      case ERR_NAK: sprintf(msg,"\n\rNAK"); break;
      case ERR_PARITY: sprintf(msg,"\n\rPARITY"); break;
      }
      puts(msg,RS);
      PWprotect_4150(FALSE);
      CLEAR();
      }
     
   }
}


olivervd



Joined: 10 Oct 2014
Posts: 10

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PostPosted: Tue Oct 14, 2014 5:43 am     Reply with quote

hello,
me too.
I have same problem.
Can you help me?sorry
asmboy



Joined: 20 Nov 2007
Posts: 2124
Location: albany ny

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PostPosted: Tue Oct 14, 2014 6:10 am     Reply with quote

see #4 in this post
http://www.ccsinfo.com/forum/viewtopic.php?t=26245

this of course dos not compile as is.
AND
also - you have quite a few LIBS that you call -but no code for them shown.

AND the "logic" of your tests on
rcv_data seems quite faulty.
To see this ,
trace out what happens in main when a given recognized value for it IS received, but then no new chars follow ?

What will main() do about it ?

what does your schematic look like
OR how are you simulating / testing this ?
olivervd



Joined: 10 Oct 2014
Posts: 10

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PostPosted: Thu Oct 16, 2014 12:56 am     Reply with quote

Hello,
Thanks for you answer, this is my code.
I use PCW compiler(CCS).
My hardware is the recommended EM Marin for Em4150. If you need my schematic I can send for email.
When I run my circuit emerge the next message "ERROR PARITY".
I can read em4100 and em4102, also I can write em4150, but I can't read em4150.
Can you help me?
This is my email: olivercharmander@hotmail.com


Code:
 
#include <16F876.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT,NOPUT
#use delay(clock=20000000)
#users232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=S)
#include <em4095.c>
#include <em4102.c>
#include <em4150.c>
#include <stdlib.h>

int32 msg;
int8 err;
int32 tagNum=0x00;
int8  tag_adr=5;// tag_adr is between 0-33

#INT_RDA
void receiving_data() {
   rcv_data=getc(RS);
   printf("valor de rcv_data principal= %d",rcv_data);
 
}

void main(void) {

enable_interrupts(INT_RDA);
   enable_interrupts(GLOBAL);
   
   delay_ms(1000);
   
   rf_init();
   rf_powerUp();

while(true) {
 
 restart_wdt();

err = read_4150(*msg,tag_adr);

tagNum=msg;

switch(err) {
     
      case ERR_OK: //sprintf(msg, "\n\rData: %lu", tagNum);
      sprintf(msg, "\n\rData: %x", tagNum);
      break;
      case ERR_LIW: sprintf(msg,"\n\rLIW LECTURA");
     
      break;
      case ERR_NAK: sprintf(msg,"\n\rNAK LECTURA");
   
      break;
      case ERR_PARITY:
      sprintf(msg,"\n\rPARITY LECTURA");
     //printf("PARITY\n\r");
      break;
     
     
   
      }
     
      puts(msg,RS);
      clear();
  }
}
olivervd



Joined: 10 Oct 2014
Posts: 10

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PostPosted: Thu Oct 16, 2014 1:07 am     Reply with quote

For simulation I use serial transmission, by Arduino (I use Arduino example "Software Serial").
PCM programmer



Joined: 06 Sep 2003
Posts: 21420

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PostPosted: Thu Oct 16, 2014 11:32 am     Reply with quote

First, your code doesn't compile, so that's not your real program.
For example, you have stream=S, but then you call fgetc(RS).
There are several errors like this.

But the main problem is that you are not calling read_em4150()
correctly. The first parameter is declared to be a pointer, so you
should be giving it the address of msg.

You are doing this. It's wrong:
Quote:
err = read_4150(*msg, tag_adr);


You should do it like this:
Code:
err = read_4150(&msg, tag_adr);
olivervd



Joined: 10 Oct 2014
Posts: 10

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PostPosted: Fri Oct 17, 2014 12:36 am     Reply with quote

PCM thank you for your answer,
I have tried your advise but I have a same problem. I run my circuit and emerge the same error "PARITY".

Code:

#include <16F876a.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP,NOBROWNOUT,NOPUT
#use delay(clock=20000000)
#use rs232(baud=9600,parity=N,xmit=PIN_C6,rcv=PIN_C7,bits=8,stream=RS)



#include <em4095.c>
#include <em4102.c>
#include <em4150.c>
#include <stdlib.h>


int32 msg;
int8 err;
int32 tagNum=0x00;
 int8  tag_adr=5;// tag_adr is between 0-33

void main(void) {

 rf_init();
   rf_powerUp();
   
 
  while(true) {
 
// restart_wdt();
 
 
     
     
     
      //LOGIN
   
      err = login_4150(0x00);
     // resultado=readProtect_4150(1, 2);
    //  printf("valor de Resultado = %d\n\r",resultado);
     
   //   printf("valor de ERR LOGIN = %d\n\r",err);
     
      switch(err) {
      case ERR_OK: printf("\n\rOK LOGIN"); break;
      case ERR_LIW:printf("\n\rLIW LOGIN"); break;
      case ERR_NAK:printf("\n\rNAK LOGIN"); break;
      case ERR_PARITY: printf("\n\rPARITY LOGIN"); break;
      }
      puts(msg,RS);
      delay_ms(500);
       
 
 //ESCRITURA
   tagNum = make32(0x01,0x02,0x03,0x04);
     tag_adr=5;
     err = write_4150(tagNum,tag_adr);
      switch(err) {
      case ERR_OK: printf("\n\rOK ESCRITURA");
      break;
      case ERR_LIW:printf("\n\rLIW ESCRITURA"); break;
      case ERR_NAK: printf("\n\rNAK ESCRITURA"); break;
      case ERR_PARITY: printf("\n\rPARITY ESCRITURA"); break;
      }
      puts(msg,RS);
      PWprotect_4150(FALSE);
    delay_ms(500);
     
     
err=setPassword_4150(oldPassword, newPassword);
printf("valor de ERR Password = %d\n\r",err);

     
   //LECTURA   
  err = read_4150(&msg,5);

tagNum=msg;
 
       
      switch(err) {
     
      case ERR_OK: printf("Data: %lu \n\r", tagNum);
      printf("Data: %x \n\r", tagNum);
      break;
      case ERR_LIW: printf("\n\rLIW LECTURA");
     
      break;
      case ERR_NAK: printf("\n\rNAK LECTURA");
   
      break;
      case ERR_PARITY:
      printf("\n\rPARITY LECTURA");
     //printf("PARITY\n\r");
      break;
     
     
   
      }
     
      puts(msg,RS);
     
  //RESET
   err= reset_4150() ; 
   
   switch(err) {
     
      case ERR_OK: printf("\n\rOK RESET");
      break;
      case ERR_LIW: printf("\n\rLIW RESET");
     
      break;
      case ERR_NAK: printf("\n\rNAK RESET");
   
      break;
}
 
}
   }
olivervd



Joined: 10 Oct 2014
Posts: 10

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PostPosted: Fri Oct 17, 2014 12:50 am     Reply with quote

The error R change RS, it was error by copy-paste.
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