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- added missing timeout checks

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- relocated timer resets in standalone mode
This commit is contained in:
tharexde 2021-02-09 23:22:46 +01:00
commit b20f532282
2 changed files with 31 additions and 17 deletions
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28
armsrc/em4x50.c
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@ -1222,11 +1222,19 @@ static int em4x50_sim_read_bit(void) {
while (cycles < EM4X50_T_TAG_FULL_PERIOD) {
// wait until reader field disappears
while (!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));
while ((timeout--) && !(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK));
if (timeout <= 0) {
return PM3_ETIMEOUT;
}
timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
// now check until reader switches on carrier field
tval = GetTicks();
while (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) {
while ((timeout--) && (AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) {
if (timeout <= 0) {
return PM3_ETIMEOUT;
}
// check if current cycle takes longer than "usual""
if (GetTicks() - tval > EM4X50_T_ZERO_DETECTION * CYCLES2TICKS) {
@ -1237,7 +1245,7 @@ static int em4x50_sim_read_bit(void) {
if (timeout <= 0) {
return PM3_ETIMEOUT;
}
// timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
//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
@ -1248,6 +1256,7 @@ static int em4x50_sim_read_bit(void) {
return 0;
}
}
timeout = EM4X50_T_SIMULATION_TIMEOUT_READ;
// no gap detected, i.e. reader field is still up;
// continue with counting cycles
@ -1431,11 +1440,14 @@ static int em4x50_sim_handle_standard_read_command(uint32_t *tag) {
// last word read protected
int lwrp = (reflect32(tag[EM4X50_PROTECTION]) >> 8) & 0xFF;
int command = PM3_SUCCESS;
while ((BUTTON_PRESS() == false) && (data_available() == false)) {
WDT_HIT();
int command = em4x50_sim_send_listen_window(tag);
command = em4x50_sim_send_listen_window(tag);
if (command != PM3_SUCCESS) {
return command;
}
@ -1737,19 +1749,19 @@ void em4x50_handle_commands(int *command, uint32_t *tag) {
break;
case EM4X50_COMMAND_RESET:
*command = em4x50_sim_handle_reset_command(tag);
*command = em4x50_sim_handle_reset_command(tag);
break;
case EM4X50_COMMAND_WRITE:
*command = em4x50_sim_handle_write_command(tag);
*command = em4x50_sim_handle_write_command(tag);
break;
case EM4X50_COMMAND_WRITE_PASSWORD:
*command = em4x50_sim_handle_writepwd_command(tag);
*command = em4x50_sim_handle_writepwd_command(tag);
break;
case EM4X50_COMMAND_SELECTIVE_READ:
*command = em4x50_sim_handle_selective_read_command(tag);
*command = em4x50_sim_handle_selective_read_command(tag);
break;
case EM4X50_COMMAND_STANDARD_READ: