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Refactored 'lf t55xx brute', split it up into two commands.

Browse source 
- lf t55xx brute  (tries bruteforcing a range of pwds
- lf t55xx chk    (uses dictionary file or RDV4 flashmem)

FIX: adjust lf sim (@marshmellow42)  see 7008cf9c15
"attempt to speed up the loops waiting for carrier signal to go high or low
by only checking for a halt (button press or usbpol) every 256th loop
iteration. some users were experiencing modulating reactions to be too slow.

ADD: 'lf t55xx chk'
It uses @marshmellows42 idea behind commit  (6178b085a0)
With calculating a baseline (read block0 32times and average the signal-ish) and sampling only 1024 signal data. The algo then proceeds to calc the average and keep track of the candidate which is given the most difference in signal data average value.    I do some squaring and shifting for this.
The candidate is then send back to client to be tested properly with  trymodulation like before.

This seems to work good on t55xx card which has a ASK configuration.

WORK-IN-PROGRESS
This commit is contained in:
iceman1001 2019-01-11 14:46:27 +01:00
commit f215ebef80
6 changed files with 255 additions and 59 deletions
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2
armsrc/apps.h
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@ -103,6 +103,8 @@ void T55xxWriteBlock(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t PwdMode
void T55xxWriteBlockExt(uint32_t Data, uint8_t Block, uint32_t Pwd, uint8_t PwdMode);
void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd);
void T55xxWakeUp(uint32_t Pwd);
void T55xx_ChkPwds(void);
void TurnReadLFOn(uint32_t delay);
void EM4xReadWord(uint8_t addr, uint32_t pwd, uint8_t usepwd);
void EM4xWriteWord(uint32_t flag, uint32_t data, uint32_t pwd);