Reading Wiegand 26 Data with PIC18F46K22

[cllunlu]

Hi

I have a problem about reading data of wiegand 26 protocol. I am using PIC18F46K22.

Can you give a lead about this. Can you send sample codes about it. I have written code but failed.


Code is below. I wanna how many received data "0" and data "1".

I read

data0: 25 piece

data1: 1 piece.


Can you help me pls?


#include "lcd_test.c"

#zero_ram


#use delay(crystal=20000000)
#INT_EXT2
void read_wiegandD1()
{
disable_interrupts(INT_EXT2);
if(length_count<26)
{
wie_data[length_count]="1";
data1=data1+1;
length_count=length_count+1;
clear_interrupt(INT_EXT2);
enable_interrupts(INT_EXT2);
}
}


#use delay(crystal=20000000)
#INT_EXT1
void read_wiegandD0()
{
disable_interrupts(INT_EXT1);
if(length_count<26)
{
wie_data[length_count]="0";
data0=data0+1;
length_count=length_count+1;
clear_interrupt(INT_EXT1);
enable_interrupts(INT_EXT1);
}

}


#use delay(crystal=20000000)
void main()
{
board_init();
lcd_init();

lcd_gotoxy(1,1);
printf(lcd_putc, " READ CARD: ");

output_toggle(pin_d5);

delay_ms(2000);

lcd_gotoxy(1,2);
printf(lcd_putc, "CARD ID: ");
data_show();
while(TRUE)
{
output_toggle(pin_d5);
delay_ms(500);

if(length_count>25)
{
length_count=0;

output_high(pin_D5);

data_show();

delay_ms(8000);

}

}
}


#use delay(crystal=20000000)
void data_show()
{
lcd_gotoxy(1,3);
printf(lcd_putc,"Data0: %u",data0);

lcd_gotoxy(1,4);
printf(lcd_putc,"Data1: %u",data1);

}


/**************************************
Function: board_init
Input Arguments:None
Output Arguments: None
Purpose:Initialize the board
**************************************/
/*
#use delay(crystal=20000000)
void board_init(void)
{
set_tris_b(0xFF);
enable_interrupts(INT_EXT2_H2L);
enable_interrupts(INT_EXT1_H2L);
enable_interrupts(GLOBAL);

length_count=0;

}

[temtronic]

couple of hints..

1) when asking for help about a device or protocol you should include a 'link' to the appropriate device.Without that 'we' don't know if it's a simple 5VPIC vs 3V device problem, bus topology error(no pullups), or a coding issue(timing,polarity, etc.)

2) please use the 'code' buttons when posting code as it 'magically' makes the code a LOT easier to read! The easier you make our life, the faster we can help!

3) Please confirm the PIC does the 1Hz LED program and correctly accesses the LCD module.You don't have a needed delay_ms(500); before the lcd_init() call.

4) you have 'read card' in your code, so I'm assuming you have a 'card reader' using the protocol. PLEASE post a link to that device !

hth
jay

[temtronic]

I googled 'Wiegand 26 ccs c code' and got a lot of hits...1/2 way down on first page there's a hit with working code.(according to the poster)..

I find 'googling' to be a great resource IF you type in the correct keywords.

hth
jay

[Ttelmah]

Several initial comments:
1) Use the code buttons.
2) Why have you got the code in 'bits', with separate clock definitions etc.?.
The clock and fuses etc., need to apply _once_.

Now I've had to make several assumptions - two line LCD?.

[cllunlu]

Hi jay,

Thank you so much, be interested in my issue. I am trying to reading card data (UHF RFID) via Weigand 26 protocols.

http://www.aliexpress.com/item/uhf-rfid-long-range-reader-TCP-IP-ethernet-interface-free-shipping-free-sample-tags-and-cards/465350736.html.

I am student at university, I haven't more experience about it. Please Can you help?

[cllunlu]

Hi Ttelmah,

I will try your sample code. And I will write result.

Thanks you so much.

Celal