flipperzero-firmware/lib/irda/encoder_decoder/nec/irda_decoder_nec.c
あく 389ff92cc1
Naming and coding style convention, new linter tool. (#945)
* Makefile, Scripts: new linter
* About: remove ID from IC
* Firmware: remove double define for DIVC/DIVR
* Scripts: check folder names too. Docker: replace syntax check with make lint.
* Reformat Sources and Migrate to new file naming convention
* Docker: symlink clang-format-12 to clang-format
* Add coding style guide
2022-01-05 19:10:18 +03:00

101 lines
3.6 KiB
C

#include "common/irda_common_i.h"
#include "irda.h"
#include "irda_protocol_defs_i.h"
#include <stdbool.h>
#include <stdint.h>
#include <furi.h>
#include "../irda_i.h"
IrdaMessage* irda_decoder_nec_check_ready(void* ctx) {
return irda_common_decoder_check_ready(ctx);
}
bool irda_decoder_nec_interpret(IrdaCommonDecoder* decoder) {
furi_assert(decoder);
bool result = false;
if(decoder->databit_cnt == 32) {
uint8_t address = decoder->data[0];
uint8_t address_inverse = decoder->data[1];
uint8_t command = decoder->data[2];
uint8_t command_inverse = decoder->data[3];
if((command == (uint8_t)~command_inverse) && (address == (uint8_t)~address_inverse)) {
decoder->message.protocol = IrdaProtocolNEC;
decoder->message.address = address;
decoder->message.command = command;
decoder->message.repeat = false;
result = true;
} else {
decoder->message.protocol = IrdaProtocolNECext;
decoder->message.address = decoder->data[0] | (decoder->data[1] << 8);
decoder->message.command = decoder->data[2] | (decoder->data[3] << 8);
decoder->message.repeat = false;
result = true;
}
} else if(decoder->databit_cnt == 42) {
uint32_t* data1 = (void*)decoder->data;
uint16_t* data2 = (void*)(data1 + 1);
uint16_t address = *data1 & 0x1FFF;
uint16_t address_inverse = (*data1 >> 13) & 0x1FFF;
uint16_t command = ((*data1 >> 26) & 0x3F) | ((*data2 & 0x3) << 6);
uint16_t command_inverse = (*data2 >> 2) & 0xFF;
if((address == (~address_inverse & 0x1FFF)) && (command == (~command_inverse & 0xFF))) {
decoder->message.protocol = IrdaProtocolNEC42;
decoder->message.address = address;
decoder->message.command = command;
decoder->message.repeat = false;
result = true;
} else {
decoder->message.protocol = IrdaProtocolNEC42ext;
decoder->message.address = address | (address_inverse << 13);
decoder->message.command = command | (command_inverse << 8);
decoder->message.repeat = false;
result = true;
}
}
return result;
}
// timings start from Space (delay between message and repeat)
IrdaStatus irda_decoder_nec_decode_repeat(IrdaCommonDecoder* decoder) {
furi_assert(decoder);
float preamble_tolerance = decoder->protocol->timings.preamble_tolerance;
uint32_t bit_tolerance = decoder->protocol->timings.bit_tolerance;
IrdaStatus status = IrdaStatusError;
if(decoder->timings_cnt < 4) return IrdaStatusOk;
if((decoder->timings[0] > IRDA_NEC_REPEAT_PAUSE_MIN) &&
(decoder->timings[0] < IRDA_NEC_REPEAT_PAUSE_MAX) &&
MATCH_TIMING(decoder->timings[1], IRDA_NEC_REPEAT_MARK, preamble_tolerance) &&
MATCH_TIMING(decoder->timings[2], IRDA_NEC_REPEAT_SPACE, preamble_tolerance) &&
MATCH_TIMING(decoder->timings[3], decoder->protocol->timings.bit1_mark, bit_tolerance)) {
status = IrdaStatusReady;
decoder->timings_cnt = 0;
} else {
status = IrdaStatusError;
}
return status;
}
void* irda_decoder_nec_alloc(void) {
return irda_common_decoder_alloc(&protocol_nec);
}
IrdaMessage* irda_decoder_nec_decode(void* decoder, bool level, uint32_t duration) {
return irda_common_decode(decoder, level, duration);
}
void irda_decoder_nec_free(void* decoder) {
irda_common_decoder_free(decoder);
}
void irda_decoder_nec_reset(void* decoder) {
irda_common_decoder_reset(decoder);
}