22e1ecb642
* Hal lfrfid: add read timer pulse and period config fns * New debug application for lfrfid subsystem * New lfrfid: app, fix naming * App lfrfid: assets * Container view module * App ibutton: remove unused header * App lfrfid scenes * App notification, add yield to blocking operations, add speaker volume control * App lfrfid: reading key scene * Assets: placeholder icon * App lfrfid: reworked container view module * App lfrfid: new scenes * App lfrfid: write scene * App lfrfid: write hid * App lfrfid: emulate scene * App lfrfid: save name scene * App lfrfid: add missing file
35 lines
966 B
C
35 lines
966 B
C
#include "manchester-decoder.h"
|
|
#include <stdint.h>
|
|
|
|
static const uint8_t transitions[] = {0b00000001, 0b10010001, 0b10011011, 0b11111011};
|
|
static const ManchesterState manchester_reset_state = ManchesterStateMid1;
|
|
|
|
bool manchester_advance(
|
|
ManchesterState state,
|
|
ManchesterEvent event,
|
|
ManchesterState* next_state,
|
|
bool* data) {
|
|
bool result = false;
|
|
ManchesterState new_state;
|
|
|
|
if(event == ManchesterEventReset) {
|
|
new_state = manchester_reset_state;
|
|
} else {
|
|
new_state = transitions[state] >> event & 0x3;
|
|
if(new_state == state) {
|
|
new_state = manchester_reset_state;
|
|
} else {
|
|
if(new_state == ManchesterStateMid0) {
|
|
*data = false;
|
|
result = true;
|
|
} else if(new_state == ManchesterStateMid1) {
|
|
*data = true;
|
|
result = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
*next_state = new_state;
|
|
return result;
|
|
}
|