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rename globals

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This commit is contained in:
Philippe Teuwen 2021-08-21 23:02:27 +02:00
commit 5b54385347
34 changed files with 458 additions and 458 deletions
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80
armsrc/em4x50.c
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@ -63,18 +63,18 @@
#define EM4X50_TAG_MAX_NO_BYTES 136
#define EM4X50_TIMEOUT_PULSE_EVAL 2500
int gHigh = 190;
int gLow = 60;
int g_High = 190;
int g_Low = 60;
// indication whether a previous login has been successful, so operations
// that require authentication can be handled
bool gLogin = false;
bool g_Login = false;
// WritePassword process in simulation mode is handled in a different way
// compared to operations like read, write, login, so it is necessary to
// to be able to identfiy it
bool gWritePasswordProcess = false;
bool g_WritePasswordProcess = false;
// if reader sends a different password than "expected" -> save it
uint32_t gPassword = 0;
uint32_t g_Password = 0;
// extract and check parities
// return result of parity check and extracted plain data
@ -173,7 +173,7 @@ void em4x50_setup_sim(void) {
}
// calculate signal properties (mean amplitudes) from measured data:
// 32 amplitudes (maximum values) -> mean amplitude value -> gHigh -> gLow
// 32 amplitudes (maximum values) -> mean amplitude value -> g_High -> g_Low
static bool get_signalproperties(void) {
bool signal_found = false;
@ -224,8 +224,8 @@ static bool get_signalproperties(void) {
sample_max_mean = sample_max_sum / no_periods;
// set global envelope variables
gHigh = sample_ref + pct * (sample_max_mean - sample_ref) / 100;
gLow = sample_ref - pct * (sample_max_mean - sample_ref) / 100;
g_High = sample_ref + pct * (sample_max_mean - sample_ref) / 100;
g_Low = sample_ref - pct * (sample_max_mean - sample_ref) / 100;
return true;
}
@ -245,7 +245,7 @@ static bool invalid_bit(void) {
WaitUS(EM4X50_T_TAG_QUARTER_PERIOD * CYCLES2MUSEC);
// bit in "undefined" state?
if (sample <= gHigh && sample >= gLow)
if (sample <= g_High && sample >= g_Low)
return true;
return false;
@ -259,7 +259,7 @@ static uint32_t get_pulse_length(void) {
volatile uint8_t sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
while (sample > gLow && (timeout--))
while (sample > g_Low && (timeout--))
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
if (timeout <= 0)
@ -268,14 +268,14 @@ static uint32_t get_pulse_length(void) {
tval = GetTicks();
timeout = EM4X50_TIMEOUT_PULSE_EVAL;
while (sample < gHigh && (timeout--))
while (sample < g_High && (timeout--))
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
if (timeout <= 0)
return 0;
timeout = EM4X50_TIMEOUT_PULSE_EVAL;
while (sample > gLow && (timeout--))
while (sample > g_Low && (timeout--))
sample = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
if (timeout <= 0)
@ -617,7 +617,7 @@ static int login(uint32_t password) {
return PM3_SUCCESS;
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("error in command request");
}
@ -732,7 +732,7 @@ void em4x50_chk(uint8_t *filename) {
em4x50_setup_read();
// set gHigh and gLow
// set g_High and g_Low
LED_C_ON();
if (get_signalproperties() && find_em4x50_tag()) {
@ -781,7 +781,7 @@ static int reset(void) {
return PM3_SUCCESS;
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("error in command request");
}
@ -808,7 +808,7 @@ int standard_read(int *now, uint32_t *words) {
*now -= fwr;
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("didn't find a listen window");
}
@ -841,7 +841,7 @@ static int selective_read(uint32_t addresses, uint32_t *words) {
return status;
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("error in command request");
}
@ -855,7 +855,7 @@ void em4x50_read(em4x50_data_t *etd) {
em4x50_setup_read();
// set gHigh and gLow
// set g_High and g_Low
LED_C_ON();
if (get_signalproperties() && find_em4x50_tag()) {
@ -964,7 +964,7 @@ static int write(uint32_t word, uint32_t addresses) {
}
}
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("error in command request");
}
@ -1013,7 +1013,7 @@ static int write_password(uint32_t password, uint32_t new_password) {
}
}
} else {
if (DBGLEVEL >= DBG_DEBUG)
if (g_dbglevel >= DBG_DEBUG)
Dbprintf("error in command request");
}
@ -1338,7 +1338,7 @@ static int check_rm_request(uint32_t *tag) {
// if command before was EM4X50_COMMAND_WRITE_PASSWORD
// switch to separate process
if (gWritePasswordProcess) {
if (g_WritePasswordProcess) {
return EM4X50_COMMAND_WRITE_PASSWORD;
} else {
// read mode request detected, get command from reader
@ -1454,7 +1454,7 @@ static int em4x50_sim_handle_standard_read_command(uint32_t *tag) {
return res;
}
if ((gLogin == false) && (i >= fwrp) && (i <= lwrp)) {
if ((g_Login == false) && (i >= fwrp) && (i <= lwrp)) {
em4x50_sim_send_word(0x00);
} else {
em4x50_sim_send_word(reflect32(tag[i]));
@ -1509,7 +1509,7 @@ static int em4x50_sim_handle_selective_read_command(uint32_t *tag) {
}
// if not authenticated do not send read protected words
if ((gLogin == false) && (i >= fwrp) && (i <= lwrp)) {
if ((g_Login == false) && (i >= fwrp) && (i <= lwrp)) {
em4x50_sim_send_word(0x00);
} else {
em4x50_sim_send_word(reflect32(tag[i]));
@ -1532,15 +1532,15 @@ static int em4x50_sim_handle_login_command(uint32_t *tag) {
if (pwd && (password == reflect32(tag[EM4X50_DEVICE_PASSWORD]))) {
em4x50_sim_send_ack();
gLogin = true;
g_Login = true;
LED_D_ON();
} else {
em4x50_sim_send_nak();
gLogin = false;
g_Login = false;
LED_D_OFF();
// save transmitted password (to be used in standalone mode)
gPassword = password;
g_Password = password;
}
// continue with standard read mode
return EM4X50_COMMAND_STANDARD_READ;
@ -1554,7 +1554,7 @@ static int em4x50_sim_handle_reset_command(uint32_t *tag) {
// send ACK
em4x50_sim_send_ack();
gLogin = false;
g_Login = false;
LED_D_OFF();
// wait for initialization (tinit)
@ -1598,7 +1598,7 @@ static int em4x50_sim_handle_write_command(uint32_t *tag) {
break;
case EM4X50_PROTECTION:
if (gLogin) {
if (g_Login) {
tag[address] = reflect32(data);
em4x50_sim_send_ack();
} else {
@ -1608,7 +1608,7 @@ static int em4x50_sim_handle_write_command(uint32_t *tag) {
break;
case EM4X50_CONTROL:
if (gLogin) {
if (g_Login) {
tag[address] = reflect32(data);
em4x50_sim_send_ack();
} else {
@ -1629,7 +1629,7 @@ static int em4x50_sim_handle_write_command(uint32_t *tag) {
default:
if ((address >= fwwp) && (address <= lwwp)) {
if (gLogin) {
if (g_Login) {
tag[address] = reflect32(data);
em4x50_sim_send_ack();
} else {
@ -1675,7 +1675,7 @@ static int em4x50_sim_handle_writepwd_command(uint32_t *tag) {
bool pwd = false;
gWritePasswordProcess = true;
g_WritePasswordProcess = true;
// read password
uint32_t act_password = 0;
@ -1686,20 +1686,20 @@ static int em4x50_sim_handle_writepwd_command(uint32_t *tag) {
if (pwd && (act_password == reflect32(tag[EM4X50_DEVICE_PASSWORD]))) {
em4x50_sim_send_ack();
gLogin = true;
g_Login = true;
} else {
em4x50_sim_send_nak();
gLogin = false;
gWritePasswordProcess = false;
g_Login = false;
g_WritePasswordProcess = false;
// save transmitted password (to be used in standalone mode)
gPassword = act_password;
g_Password = act_password;
return EM4X50_COMMAND_STANDARD_READ;
}
int command = em4x50_sim_send_listen_window(tag);
gWritePasswordProcess = false;
g_WritePasswordProcess = false;
if (command != EM4X50_COMMAND_WRITE_PASSWORD) {
return command;
}
@ -1714,7 +1714,7 @@ static int em4x50_sim_handle_writepwd_command(uint32_t *tag) {
if (pwd) {
em4x50_sim_send_ack();
tag[EM4X50_DEVICE_PASSWORD] = reflect32(new_password);
gPassword = new_password;
g_Password = new_password;
} else {
em4x50_sim_send_nak();
return EM4X50_COMMAND_STANDARD_READ;
@ -1793,8 +1793,8 @@ void em4x50_sim(uint32_t *password) {
// init
LEDsoff();
em4x50_setup_sim();
gLogin = false;
gWritePasswordProcess = false;
g_Login = false;
g_WritePasswordProcess = false;
// start with inital command = standard read mode
command = EM4X50_COMMAND_STANDARD_READ;
@ -1812,7 +1812,7 @@ void em4x50_sim(uint32_t *password) {
// mode and reset former authentication
if (command == PM3_ETIMEOUT) {
command = EM4X50_COMMAND_STANDARD_READ;
gLogin = false;
g_Login = false;
LED_D_OFF();
}
}