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initial implementation of em4x50 standalone mode

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tharexde 2021-02-14 12:20:18 +01:00
commit 9a96157e82
4 changed files with 49 additions and 55 deletions
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30
armsrc/em4x50.c
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@ -256,7 +256,7 @@ static uint32_t get_pulse_length(void) {
int32_t timeout = EM4X50_TIMEOUT_PULSE_EVAL, tval = 0;
// iterates pulse length (low -> high -> low)
// iterates pulse lengths (low -> high -> low)
volatile uint8_t sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
@ -267,7 +267,6 @@ static uint32_t get_pulse_length(void) {
return 0;
tval = GetTicks();
//timeout = (T0 * 3 * EM4X50_T_TAG_FULL_PERIOD);
timeout = EM4X50_TIMEOUT_PULSE_EVAL;
while (sample < gHigh && (timeout--))
@ -276,7 +275,6 @@ static uint32_t get_pulse_length(void) {
if (timeout <= 0)
return 0;
//timeout = (T0 * 3 * EM4X50_T_TAG_FULL_PERIOD);
timeout = EM4X50_TIMEOUT_PULSE_EVAL;
while (sample > gLow && (timeout--))
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
@ -305,7 +303,6 @@ static void em4x50_reader_send_bit(int bit) {
// disable modulation (activate the field) for 7 cycles of carrier
// period (Opt64)
LOW(GPIO_SSC_DOUT);
//while (AT91C_BASE_TC0->TC_CV < T0 * 7);
while (GetTicks() - tval < 7 * CYCLES2TICKS);
// enable modulation (drop the field) for remaining first
@ -862,16 +859,16 @@ void em4x50_read(em4x50_data_t *etd) {
LED_C_ON();
if (get_signalproperties() && find_em4x50_tag()) {
LED_C_OFF();
LED_D_ON();
LED_C_OFF();
LED_D_ON();
// try to login with given password
if (etd->pwd_given)
blogin = (login(etd->password1) == PM3_SUCCESS);
// try to login with given password
if (etd->pwd_given)
blogin = (login(etd->password1) == PM3_SUCCESS);
// only one word has to be read -> first word read = last word read
if (blogin)
status = selective_read(etd->addresses, words);
// only one word has to be read -> first word read = last word read
if (blogin)
status = selective_read(etd->addresses, words);
}
LEDsoff();
@ -914,7 +911,7 @@ void em4x50_reader(void) {
int now = 0;
uint32_t words[EM4X50_NO_WORDS] = {0x0};
em4x50_setup_read();
em4x50_setup_read();
LED_C_ON();
if (get_signalproperties() && find_em4x50_tag()) {
@ -1245,7 +1242,6 @@ static int em4x50_sim_read_bit(void) {
if (timeout <= 0) {
return PM3_ETIMEOUT;
}
//timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
// now we have a reference "position", from here it will take
// slightly less than 32 cycles until the end of the bit period
@ -1447,7 +1443,7 @@ static int em4x50_sim_handle_standard_read_command(uint32_t *tag) {
WDT_HIT();
command = em4x50_sim_send_listen_window(tag);
if (command != PM3_SUCCESS) {
return command;
}
@ -1543,7 +1539,7 @@ static int em4x50_sim_handle_login_command(uint32_t *tag) {
em4x50_sim_send_nak();
gLogin = false;
LED_D_OFF();
// save transmitted password for future use (e.g. standalone mode)
gPassword = password;
}
@ -1782,7 +1778,7 @@ void em4x50_handle_commands(int *command, uint32_t *tag) {
// LED D -> operations that require authentication are possible
void em4x50_sim(uint32_t *password) {
int command = 0;
int command = PM3_ENODATA;
uint8_t *em4x50_mem = BigBuf_get_EM_addr();
uint32_t tag[EM4X50_NO_WORDS] = {0x0};