Merge pull request #1 from arha/arha-bitwise

README.md

@@ -42,6 +42,17 @@ External RX options:
 - Some read-head directly connected to GPIO, ADC'd, and parsed all on the Flipper. Likely the most compact and cheapest module option, but also would require the most work.
 - USB HID input likely infeasible; seems the FZ cannot act as an HID host.
 
+## arha-bitwise branch todo & notes
+Attempting to exploit flipper hardware to some extent
+
+- [X] Preprocess all MSR data into bitwise arrays, including manchester encoding. 
+- [ ] Feed bits from timers
+- [ ] Sync to the lfrfid timer and experiment representing a field flip with a few cycles of a high frequency carrier, like the 125khz lfrfid one. Perhaps mag readers' frontends will lowpass such signals, and keep only the low frequency component, in an attempt to drown out nearby noise?
+- [X] Can the CC1101 radio be used in any way? Driving it from GD0 can achieve 50us, or about 10khz. Probably more with sync/packet mode. **Currently under testing**. The signal is extra noisy with a very wide bandwidth, but, in theory, it can work
+- [ ] Can the 5V pin act as a coil driver? I've read reports it can drive 0.4A, other reports it can drive 2A. It boils down to bq25896 being fast enough. Ref: bq25896_enable_otg, which will probably need bypassing kernel libs and calling furi_hal_i2c_tx/furi_hal_i2c_tx whatever calls from Cube libs.
+- [ ] Investigate transparent mode on 3916
+- [ ] Can the piezo be used at its resonant frequency? I've seen LF signals being emulated with [nothing but headphones](https://github.com/smre/DCF77/blob/master/DCF77.py#L124) running a subharmonic; the wheel brake on some carts seems to react to audiofreq signals (or the RF emission from driving a speaker)
+
 ----
 ## Credits
 This project interpolates work from [Samy Kamkar's original MagSpoof project](https://github.com/samyk/magspoof), [dunaevai135 & AlexYaro's Flipper hackathon project](https://github.com/dunaevai135/flipperzero-firmware), and the Flipper team's [LF RFID](https://github.com/flipperdevices/flipperzero-firmware/tree/dev/applications/main/lfrfid) and [SubGhz](https://github.com/flipperdevices/flipperzero-firmware/tree/dev/applications/main/subghz) apps.  

assets/samy-javier-branch.mag

@@ -0,0 +1,7 @@
+Filetype: Flipper Mag device
+Version: 1
+# Mag device track data
+# found in samy magspoof branch f150bb783237051fba7e4e6ed96a722e542a9663, using as test data, card is long expired
+Track 1: %B493173000682759^URISTA HDZ-IVAN JAVIER    ^150220100234000000?
+Track 2: ;493173000682759=15022100000234?
+Track 3: 

assets/samy.mag

@@ -0,0 +1,8 @@
+Filetype: Flipper Mag device
+Version: 1
+# Mag device track data
+# Track 1: %B123456781234567^LASTNAME/FIRST^YYMMSSSDDDDDDDDDDDDDDDDDDDDDDDDD?
+Track 1: %B426684131234567^LASTNAME/FIRST^YYMMSSSDDDDDDDDDDDDDDDDDDDDDDDDD?
+# Track 2: ;123456781234567=YYMMSSSDDDDDDDDDDDDDD?
+Track 2: ;426684131234567=230188855555555555555?
+Track 3: