5209701add
* Toolbox: fix null pointer dereference in manchester decoder. * FuriHal: use MPU to protect from null pointer dereference, replace flash driver with our own implementation.
35 lines
986 B
C
35 lines
986 B
C
#include "manchester-decoder.h"
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#include <stdint.h>
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static const uint8_t transitions[] = {0b00000001, 0b10010001, 0b10011011, 0b11111011};
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static const ManchesterState manchester_reset_state = ManchesterStateMid1;
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bool manchester_advance(
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ManchesterState state,
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ManchesterEvent event,
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ManchesterState* next_state,
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bool* data) {
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bool result = false;
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ManchesterState new_state;
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if(event == ManchesterEventReset) {
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new_state = manchester_reset_state;
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} else {
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new_state = transitions[state] >> event & 0x3;
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if(new_state == state) {
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new_state = manchester_reset_state;
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} else {
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if(new_state == ManchesterStateMid0) {
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if (data) *data = false;
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result = true;
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} else if(new_state == ManchesterStateMid1) {
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if (data) *data = true;
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result = true;
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}
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}
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}
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*next_state = new_state;
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return result;
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}
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