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Support for cloning to T55x7 at different clock rates & 134KHz

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* Modified commands (lf em4x):
  em410xwatch      ['h'] -- Watches for EM410x 125/134 kHz tags (option 'h' for 134)
  em410xwrite      <UID> <'0' T5555> <'1' T55x7> [clock rate] -- Write EM410x UID to T5555(Q5) or T55x7 tag, optionally setting clock rate
* Better option checking for em410xwrite & fix for uninitialized vars
* Increased samples from 2000 to 4000 in em410xwatch (2000 is OK for clock=64, but too few for clock=32)
This commit is contained in:
apresence@gmail.com 2013-05-12 08:11:00 +00:00
parent 5b59cfb7b1
commit e67b06b706
2 changed files with 92 additions and 18 deletions
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28
armsrc/lfops.c
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@ -1175,6 +1175,7 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
uint64_t rev_id = 0; // reversed ID
int c_parity[4]; // column parity
int r_parity = 0; // row parity
uint32_t clock = 0;
// Reverse ID bits given as parameter (for simpler operations)
for (i = 0; i < EM410X_ID_LENGTH; ++i) {
@ -1232,12 +1233,35 @@ void WriteEM410x(uint32_t card, uint32_t id_hi, uint32_t id_lo)
T55xxWriteBlock((uint32_t)id, 2, 0, 0);
// Config for EM410x (RF/64, Manchester, Maxblock=2)
if (card)
if (card) {
// Clock rate is stored in bits 8-15 of the card value
clock = (card & 0xFF00) >> 8;
Dbprintf("Clock rate: %d", clock);
switch (clock)
{
case 32:
clock = T55x7_BITRATE_RF_32;
break;
case 16:
clock = T55x7_BITRATE_RF_16;
break;
case 0:
// A value of 0 is assumed to be 64 for backwards-compatibility
// Fall through...
case 64:
clock = T55x7_BITRATE_RF_64;
break;
default:
Dbprintf("Invalid clock rate: %d", clock);
return;
}
// Writing configuration for T55x7 tag
T55xxWriteBlock(T55x7_BITRATE_RF_64 |
T55xxWriteBlock(clock |
T55x7_MODULATION_MANCHESTER |
2 << T55x7_MAXBLOCK_SHIFT,
0, 0, 0);
}
else
// Writing configuration for T5555(Q5) tag
T55xxWriteBlock(0x1F << T5555_BITRATE_SHIFT |