266 lines
5.9 KiB
C
266 lines
5.9 KiB
C
/* main_reqa - OpenPCD firmware for generating an endless loop of
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* ISO 14443-A REQA packets. Alternatively we can send WUPA, or
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* perform a full ISO14443A anti-collision loop.
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*
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* If a response is received from the PICC, LED1 (Red) will be switched
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* on. If no valid response has been received within the timeout of the
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* receiver, LED1 (Red) will be switched off.
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*
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*/
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#include <errno.h>
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#include <string.h>
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#include <lib_AT91SAM7.h>
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#include <librfid/rfid_layer2_iso14443a.h>
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#include "rc632.h"
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#include <os/dbgu.h>
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#include <os/led.h>
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#include <os/pcd_enumerate.h>
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#include <os/trigger.h>
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#include "../openpcd.h"
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#ifdef WITH_TC
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#include "tc.h"
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#endif
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void _init_func(void)
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{
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trigger_init();
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DEBUGPCRF("enabling RC632");
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rc632_init();
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#ifdef WITH_TC
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DEBUGPCRF("enabling TC");
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tc_cdiv_init();
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#endif
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DEBUGPCRF("turning on RF");
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rc632_turn_on_rf(RAH);
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DEBUGPCRF("initializing 14443A operation");
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rc632_iso14443a_init(RAH);
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}
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#define MODE_REQA 0x01
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#define MODE_WUPA 0x02
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#define MODE_ANTICOL 0x03
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#define MODE_14443A 0x04
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static volatile int mode = MODE_REQA;
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static const char frame_14443a[] = { 0x00, 0xff, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66 };
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static void reg_inc(u_int8_t reg)
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{
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u_int8_t val;
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rc632_reg_read(RAH, reg, &val);
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rc632_reg_write(RAH, reg, val++);
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DEBUGPCRF("reg 0x%02x = 0x%02x", reg, val);
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}
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static void reg_dec(u_int8_t reg)
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{
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u_int8_t val;
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rc632_reg_read(RAH, reg, &val);
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rc632_reg_write(RAH, reg, val--);
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DEBUGPCRF("reg 0x%02x = 0x%02x", reg, val);
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}
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static u_int8_t ana_out_sel;
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static u_int8_t mfout_sel;
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static u_int8_t speed_idx;
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static void help(void)
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{
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DEBUGPCR("r: REQA w: WUPA a: ANTICOL\r\n"
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"A: 14443A +: inc speed -: dec speed\r\n"
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"y: inc cw cond x: dec cond c: inc mod cond");
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DEBUGPCR("v: dec mod cond o: dec ana_out p: dec ana_out\r\n"
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"h: trigger high l: trigger low u: dec MFOUT mode");
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DEBUGPCR("i: inc MFOUT md <: dec cdiv ph >: inc cdiv phase\r\n"
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"{: dev cdiv }: inc cdiv");
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}
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static u_int16_t cdivs[] = { 128, 64, 32, 16 };
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int _main_dbgu(char key)
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{
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int ret = 0;
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static int cdiv_idx = 0;
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switch (key) {
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case '?':
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help();
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break;
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case 'r':
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mode = MODE_REQA;
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break;
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case 'w':
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mode = MODE_WUPA;
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break;
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case 'A':
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mode = MODE_14443A;
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break;
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case 'a':
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mode = MODE_ANTICOL;
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break;
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/* Those below don't work as long as
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* iso14443a_init() is called before
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* every cycle */
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case 'y':
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reg_inc(RC632_REG_CW_CONDUCTANCE);
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break;
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case 'x':
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reg_dec(RC632_REG_CW_CONDUCTANCE);
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break;
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case 'c':
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reg_inc(RC632_REG_MOD_CONDUCTANCE);
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break;
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case 'v':
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reg_dec(RC632_REG_MOD_CONDUCTANCE);
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break;
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case 'o':
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if (ana_out_sel > 0) {
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ana_out_sel--;
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DEBUGPCR("switching to analog output mode 0x%x\n", ana_out_sel);
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rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT, ana_out_sel);
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}
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ret = 1;
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break;
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case 'p':
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if (ana_out_sel < 0xc) {
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ana_out_sel++;
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DEBUGPCR("switching to analog output mode 0x%x\n", ana_out_sel);
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rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT, ana_out_sel);
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}
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ret = 1;
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break;
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case 'u':
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if (mfout_sel > 0) {
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mfout_sel--;
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DEBUGPCR("switching to MFOUT mode 0x%x\n", mfout_sel);
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rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
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}
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ret = 1;
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break;
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case 'i':
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if (mfout_sel < 5) {
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mfout_sel++;
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DEBUGPCR("switching to MFOUT mode 0x%x\n", mfout_sel);
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rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
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}
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ret = 1;
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break;
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case 'h':
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AT91F_PIO_SetOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
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break;
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case 'l':
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AT91F_PIO_ClearOutput(AT91C_BASE_PIOA, OPENPCD_PIO_TRIGGER);
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break;
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#ifdef WITH_TC
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case '<':
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tc_cdiv_phase_inc();
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break;
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case '>':
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tc_cdiv_phase_dec();
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break;
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case '{':
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if (cdiv_idx > 0)
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cdiv_idx--;
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tc_cdiv_set_divider(cdivs[cdiv_idx]);
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break;
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case '}':
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if (cdiv_idx < ARRAY_SIZE(cdivs)-1)
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cdiv_idx++;
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tc_cdiv_set_divider(cdivs[cdiv_idx]);
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break;
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#endif
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case '-':
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if (speed_idx > 0)
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speed_idx--;
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break;
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case '+':
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if (speed_idx < 3)
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speed_idx++;
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break;
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default:
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return -EINVAL;
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}
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return ret;
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}
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void _main_func(void)
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{
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int status;
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struct iso14443a_atqa atqa;
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struct rfid_layer2_handle l2h;
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volatile int i;
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memset(&atqa, 0, sizeof(atqa));
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/* fake layer2 handle initialization */
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memset(&l2h, 0, sizeof(l2h));
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l2h.l2 = &rfid_layer2_iso14443a;
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l2h.priv.iso14443a.state = ISO14443A_STATE_NONE;
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l2h.priv.iso14443a.level = ISO14443A_LEVEL_NONE;
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/* FIXME: why does this only work every second attempt without reset or
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* power-cycle? */
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rc632_turn_off_rf();
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//rc632_reset();
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rc632_turn_on_rf();
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rc632_iso14443a_init(RAH);
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rc632_reg_write(RAH, RC632_REG_TEST_ANA_SELECT, ana_out_sel);
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rc632_reg_write(RAH, RC632_REG_MFOUT_SELECT, mfout_sel);
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for (i = 0; i < 0x3ffff; i++) {}
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//rc632_dump();
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#ifdef WITH_TC
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tc_cdiv_print();
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#endif
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switch (mode) {
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case MODE_REQA:
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status = rc632_iso14443a_transceive_sf(RAH, ISO14443A_SF_CMD_REQA, &atqa);
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if (status < 0)
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DEBUGPCRF("error during transceive_sf REQA");
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else
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DEBUGPCRF("received ATQA: %s", hexdump((char *)&atqa, sizeof(atqa)));
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break;
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case MODE_WUPA:
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status = rc632_iso14443a_transceive_sf(RAH, ISO14443A_SF_CMD_WUPA, &atqa);
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if (status < 0)
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DEBUGPCRF("error during transceive_sf WUPA");
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else
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DEBUGPCRF("received WUPA: %s", hexdump((char *)&atqa, sizeof(atqa)));
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break;
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case MODE_ANTICOL:
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status = rfid_layer2_iso14443a.fn.open(&l2h);
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if (status < 0)
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DEBUGPCR("error during anticol");
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else
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DEBUGPCR("Anticol OK");
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break;
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case MODE_14443A:
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{
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char rx_buf[4];
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int rx_len = sizeof(rx_buf);
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rfid_layer2_iso14443a.fn.setopt(&l2h, RFID_OPT_14443A_SPEED_RX,
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&speed_idx, sizeof(speed_idx));
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rfid_layer2_iso14443a.fn.setopt(&l2h, RFID_OPT_14443A_SPEED_TX,
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&speed_idx, sizeof(speed_idx));
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rfid_layer2_iso14443a.fn.transceive(&l2h, RFID_14443A_FRAME_REGULAR,
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&frame_14443a, sizeof(frame_14443a),
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&rx_buf, &rx_len, 1, 0);
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}
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break;
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}
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if (status < 0)
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led_switch(1, 0);
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else
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led_switch(1, 1);
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led_toggle(2);
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}
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