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added new command "4x50_wipe"

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tharexde 2020-07-09 01:59:29 +02:00
commit 241e2b7c7e
1 changed files with 58 additions and 0 deletions
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58
armsrc/em4x50.c
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@ -1028,3 +1028,61 @@ void em4x50_write_password(em4x50_data_t *etd) {
lf_finalize();
reply_ng(CMD_ACK, bsuccess, 0, 0);
}
void em4x50_wipe(em4x50_data_t *etd) {
// set all data of EM4x50 tag to 0x0 including password
bool bsuccess = false;
uint8_t zero[4] = {0, 0, 0, 0};
uint8_t addresses[4] = {0, 0, EM4X50_NO_WORDS - 3, 1};
init_tag();
em4x50_setup_read();
// set gHigh and gLow
if (get_signalproperties() && find_em4x50_tag()) {
// login first
if (login(etd->password)) {
// write 0x0 to each address but ignore addresses
// 0 -> password, 32 -> serial, 33 -> uid
// writing 34 words takes about 3.6 seconds -> high timeout needed
for (int i = 1; i <= EM4X50_NO_WORDS - 3; i++)
write(zero, i);
// to verify result reset EM4x50
if (reset()) {
// login not necessary because protectd word has been set to 0
// -> no read protected words
// -> selective read can be called immediately
if (selective_read(addresses)) {
// check if everything is zero
bsuccess = true;
for (int i = 1; i <= EM4X50_NO_WORDS - 3; i++)
for (int j = 0; j < 4; j++)
bsuccess &= (tag.sectors[i][j] == 0) ? true : false;
}
if (bsuccess) {
// so far everything is fine
// last task: reset password
if (login(etd->password))
bsuccess = write_password(etd->password, zero);
// verify by login with new password
if (bsuccess)
bsuccess = login(zero);
}
}
}
}
lf_finalize();
reply_ng(CMD_ACK, bsuccess, (uint8_t *)tag.sectors, 238);
}