// read page - 32 bits
// pages 2 - 15 are probably not readable!
BOOL hitag1_read_page(BYTE *response, BYTE block)
{
BYTE tmp[HITAG1_BLOCKSIZE + 6]; // 32 bits plus 6 sync bits
if(block > HITAG1_DATABLOCKS - 1)
return FALSE;
// get tag's UID for select command
if(!hitag1_get_uid(tmp))
return FALSE;
// select for read/write
hitag1_select(tmp, tmp);
// create 12 bit command block: HITAG1_RDPPAGE + 8 bits address
strcpy(tmp, HITAG1_RDPPAGE);
inttobinstring(tmp + 4, (unsigned int) block, 8);
tmp[12]= '\0';
// ??? docs say 6 sync bits!
if(!hitag1_send_command(tmp, tmp, NO_RESET, NO_SYNC, HITAG1_BLOCKSIZE + 1, NO_ACK))
return FALSE;
// check sync
if(tmp[0] != 0x01)
return FALSE;
binarraytohex(response, tmp + 1, HITAG1_BLOCKSIZE);
return TRUE;
}
BOOL hitag1_write_page(BYTE block, BYTE *data)
{
BYTE crc, command[21], tmp[33], tmp1[4];
if(block > HITAG1_DATABLOCKS - 1)
return FALSE;
// get tag's UID for select command
if(!hitag1_get_uid(tmp))
return FALSE;
// select for read/write
hitag1_select(tmp, tmp);
// convert data to binstring for send
if(hextobinstring(tmp, data) != 32)
return FALSE;
// create and send 12 bit command block: HITAG1_WRPPAGE (4 bits) + 8 bit address
memcpy(command, HITAG1_WRPPAGE, 4);
inttobinstring(command + 4, (unsigned int) block, 8);
command[12]= '\0';
if(!hitag1_send_command(tmp1, command, NO_RESET, NO_SYNC, 0, ACK))
return FALSE;
// delay to switch back to write mode
Delay_us((RFIDlerConfig.RWD_Wait_Switch_RX_TX * RFIDlerConfig.FrameClock) / 100);
// now send data
if(!hitag1_send_command(tmp1, tmp, NO_RESET, NO_SYNC, 0, ACK))
return FALSE;
// read back and verify
// delay for long enough to allow write plus RX->TX period
Delay_us((HITAG1_WRITE_DELAY * RFIDlerConfig.FrameClock + RFIDlerConfig.RWD_Wait_Switch_RX_TX * RFIDlerConfig.FrameClock) / 100);
if(!hitag1_read_page(tmp, block))
return FALSE;
if(memcmp(tmp, data, 8) != 0)
return FALSE;
return TRUE;
}
// select specific tag for read/write operations
BOOL select_tag(BYTE *response, BYTE *uid)
{
BYTE tmp[MAXUID + 1];
if(strlen(uid) == 0)
{
if(!get_tag_uid(tmp))
return FALSE;
uid= tmp;
}
switch(RFIDlerConfig.TagType)
{
case TAG_TYPE_HITAG1:
return hitag1_select(response, uid);
break;
default:
return FALSE;
}
}
