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/* main_reqa - OpenPCD firmware for generating an endless loop of
* ISO 14443-A REQA packets. Alternatively we can send WUPA, or
* perform a full ISO14443A anti-collision loop.
*
* If a response is received from the PICC, LED1 (Red) will be switched
* on. If no valid response has been received within the timeout of the
* receiver, LED1 (Red) will be switched off.
*
* (C) 2006 by Harald Welte <hwelte@hmw-consulting.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <errno.h>
#include <string.h>
#include <lib_AT91SAM7.h>
#include <librfid/rfid_layer2_iso14443a.h>
#include "rc632.h"
#include <os/dbgu.h>
#include <os/led.h>
#include <os/pcd_enumerate.h>
#include <os/trigger.h>
#include <pcd/rc632_highlevel.h>
#include <librfid/rfid_reader.h>
#include <librfid/rfid_layer2.h>
#include "../openpcd.h"
#ifdef WITH_TC
#include "tc.h"
#endif
#define RAH NULL
static struct rfid_reader_handle *rh;
static struct rfid_layer2_handle *l2h;
void _init_func(void)
{
trigger_init();
DEBUGPCRF("enabling RC632");
rc632_init();
#ifdef WITH_TC
DEBUGPCRF("enabling TC");
tc_cdiv_init();
#endif
DEBUGPCRF("turning on RF");
rc632_turn_on_rf(RAH);
DEBUGPCRF("initializing 14443A operation");
rh = rfid_reader_open(NULL, RFID_READER_OPENPCD);
l2h = rfid_layer2_init(rh, RFID_LAYER2_ISO14443A);
}
#define MODE_REQA 0x01
#define MODE_WUPA 0x02
#define MODE_ANTICOL 0x03
#define MODE_14443A 0x04
static volatile int mode = MODE_REQA;
static const char frame_14443a[] = {
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66,
};
static void reg_inc(uint8_t reg)
{
uint8_t val;
opcd_rc632_reg_read(RAH, reg, &val);
opcd_rc632_reg_write(RAH, reg, val++);
DEBUGPCRF("reg 0x%02x = 0x%02x", reg, val);
}
static void reg_dec(uint8_t reg)
{
uint8_t val;
opcd_rc632_reg_read(RAH, reg, &val);
opcd_rc632_reg_write(RAH, reg, val--);
DEBUGPCRF("reg 0x%02x = 0x%02x", reg, val);
}
static uint8_t ana_out_sel;
static uint8_t mfout_sel;
static uint8_t speed_idx;
static void help(void)
{
DEBUGPCR("r: REQA w: WUPA a: ANTICOL\r\n"
"A: 14443A +: inc speed -: dec speed\r\n"
"y: inc cw cond x: dec cond c: inc mod cond");
DEBUGPCR("v: dec mod cond o: dec ana_out p: dec ana_out\r\n"
"h: trigger high l: trigger low u: dec MFOUT mode");
DEBUGPCR("i: inc MFOUT md <: dec cdiv ph >: inc cdiv phase\r\n"
"{: dev cdiv }: inc cdiv");
}
static uint16_t cdivs[] = { 128, 64, 32, 16 };
int _main_dbgu(char key)
{
int ret = 0;
static int cdiv_idx = 2;
switch (key) {
case '?':
help();
break;
case 'r':
mode = MODE_REQA;
break;
case 'w':
mode = MODE_WUPA;
break;
case 'A':
mode = MODE_14443A;
break;
case 'a':
mode = MODE_ANTICOL;
break;
/* Those below don't work as long as
* iso14443a_init() is called before
* every cycle */
case 'y':
reg_inc(RC632_REG_CW_CONDUCTANCE);
break;
case 'x':
reg_dec(RC632_REG_CW_CONDUCTANCE);
break;
case 'c':
reg_inc(RC632_REG_MOD_CONDUCTANCE);
break;
case 'v':
reg_dec(RC632_REG_MOD_CONDUCTANCE);
break;
case 'o':
if (ana_out_sel > 0) {
ana_out_sel--;
DEBUGPCR("switching to analog output mode 0x%x\n", ana_out_sel);
opcd_rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT,
ana_out_sel);
}
ret = 1;
break;
case 'p':
if (ana_out_sel < 0xc) {
ana_out_sel++;
DEBUGPCR("switching to analog output mode 0x%x\n", ana_out_sel);
opcd_rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT,
ana_out_sel);
}
ret = 1;
break;
case 'u':
if (mfout_sel > 0) {
mfout_sel--;
DEBUGPCR("switching to MFOUT mode 0x%x\n", mfout_sel);
opcd_rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
}
ret = 1;
break;
case 'i':
if (mfout_sel < 5) {
mfout_sel++;
DEBUGPCR("switching to MFOUT mode 0x%x\n", mfout_sel);
opcd_rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
}
ret = 1;
break;
case 'h':
AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
break;
case 'l':
AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
break;
#ifdef WITH_TC
case '<':
tc_cdiv_phase_inc();
break;
case '>':
tc_cdiv_phase_dec();
break;
case '{':
if (cdiv_idx > 0)
cdiv_idx--;
tc_cdiv_set_divider(cdivs[cdiv_idx]);
break;
case '}':
if (cdiv_idx < ARRAY_SIZE(cdivs)-1)
cdiv_idx++;
tc_cdiv_set_divider(cdivs[cdiv_idx]);
break;
#endif
case '-':
if (speed_idx > 0)
speed_idx--;
break;
case '+':
if (speed_idx < 3)
speed_idx++;
break;
default:
return -EINVAL;
}
return ret;
}
void _main_func(void)
{
int status;
struct iso14443a_atqa atqa;
volatile int i;
/* FIXME: why does this only work every second attempt without reset or
* power-cycle? */
//rc632_turn_off_rf();
//rc632_reset();
//rc632_turn_on_rf();
opcd_rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT, ana_out_sel);
opcd_rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
for (i = 0; i < 0xfffff; i++) {}
//rc632_dump();
#ifdef WITH_TC
tc_cdiv_print();
#endif
switch (mode) {
case MODE_REQA:
status = iso14443a_transceive_sf(l2h, ISO14443A_SF_CMD_REQA, &atqa);
if (status < 0)
DEBUGPCRF("error during transceive_sf REQA");
else
DEBUGPCRF("received ATQA: %s", hexdump((char *)&atqa, sizeof(atqa)));
break;
case MODE_WUPA:
status = iso14443a_transceive_sf(l2h, ISO14443A_SF_CMD_WUPA, &atqa);
if (status < 0)
DEBUGPCRF("error during transceive_sf WUPA");
else
DEBUGPCRF("received WUPA: %s", hexdump((char *)&atqa, sizeof(atqa)));
break;
case MODE_ANTICOL:
status = rfid_layer2_open(l2h);
if (status < 0)
DEBUGPCR("error during anticol");
else
DEBUGPCR("Anticol OK");
break;
case MODE_14443A:
{
char rx_buf[4];
int rx_len = sizeof(rx_buf);
rfid_layer2_setopt(l2h, RFID_OPT_14443A_SPEED_RX,
&speed_idx, sizeof(speed_idx));
rfid_layer2_setopt(l2h, RFID_OPT_14443A_SPEED_TX,
&speed_idx, sizeof(speed_idx));
rfid_layer2_transceive(l2h, RFID_14443A_FRAME_REGULAR,
&frame_14443a, sizeof(frame_14443a),
&rx_buf, &rx_len, 1, 0);
}
break;
}
if (status < 0)
led_switch(1, 0);
else
led_switch(1, 1);
led_toggle(2);
}
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