unleashed-firmware/lib/irda/nec/irda_decoder_nec.c
Albert Kharisov 31c31db479
[FL-1250, FL-1252, FL-1323, FL-1324] New IRDA Application (part 1) ()
* Add new IrdaApp (half ready), add ButtonMenu

* Fix NEC's extension

* clang-format

* Fix leak

* Add submenu optional header

* IRDA: add Edit button

* clang-format

* IrdaApp: Fix scene flow

* Add IRDA NEC extended protocol

* IRDA: Add address/command length

Co-authored-by: SG <who.just.the.doctor@gmail.com>
2021-06-02 18:16:05 +03:00

126 lines
3.5 KiB
C

#include <stdbool.h>
#include <stdint.h>
#include <furi.h>
#include "../irda_i.h"
static bool interpret_nec(IrdaCommonDecoder* decoder);
static bool interpret_necext(IrdaCommonDecoder* decoder);
static DecodeStatus decode_repeat_nec(IrdaCommonDecoder* decoder);
static const IrdaCommonProtocolSpec protocol_nec = {
{
IRDA_NEC_PREAMBULE_MARK,
IRDA_NEC_PREAMBULE_SPACE,
IRDA_NEC_BIT1_MARK,
IRDA_NEC_BIT1_SPACE,
IRDA_NEC_BIT0_MARK,
IRDA_NEC_BIT0_SPACE,
IRDA_NEC_PREAMBLE_TOLERANCE,
IRDA_NEC_BIT_TOLERANCE,
},
32,
irda_common_decode_pdwm,
interpret_nec,
decode_repeat_nec,
};
static const IrdaCommonProtocolSpec protocol_necext = {
{
IRDA_NEC_PREAMBULE_MARK,
IRDA_NEC_PREAMBULE_SPACE,
IRDA_NEC_BIT1_MARK,
IRDA_NEC_BIT1_SPACE,
IRDA_NEC_BIT0_MARK,
IRDA_NEC_BIT0_SPACE,
IRDA_NEC_PREAMBLE_TOLERANCE,
IRDA_NEC_BIT_TOLERANCE,
},
32,
irda_common_decode_pdwm,
interpret_necext,
decode_repeat_nec,
};
static bool interpret_nec(IrdaCommonDecoder* decoder) {
furi_assert(decoder);
bool result = false;
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.command = command;
decoder->message.address = address;
decoder->message.repeat = false;
result = true;
}
return result;
}
// Some NEC's extensions allow 16 bit address
static bool interpret_necext(IrdaCommonDecoder* decoder) {
furi_assert(decoder);
bool result = false;
uint8_t command = decoder->data[2];
uint8_t command_inverse = decoder->data[3];
if(command == (uint8_t)~command_inverse) {
decoder->message.command = command;
decoder->message.address = decoder->data[0] | (decoder->data[1] << 8);
decoder->message.repeat = false;
result = true;
}
return result;
}
// timings start from Space (delay between message and repeat)
static DecodeStatus decode_repeat_nec(IrdaCommonDecoder* decoder) {
furi_assert(decoder);
float preamble_tolerance = decoder->protocol->timings.preamble_tolerance;
uint32_t bit_tolerance = decoder->protocol->timings.bit_tolerance;
DecodeStatus status = DecodeStatusError;
if(decoder->timings_cnt < 4) return DecodeStatusOk;
if((decoder->timings[0] > IRDA_NEC_REPEAT_PAUSE_MIN) &&
(decoder->timings[0] < IRDA_NEC_REPEAT_PAUSE_MAX) &&
MATCH_PREAMBLE_TIMING(decoder->timings[1], IRDA_NEC_REPEAT_MARK, preamble_tolerance) &&
MATCH_PREAMBLE_TIMING(decoder->timings[2], IRDA_NEC_REPEAT_SPACE, preamble_tolerance) &&
MATCH_BIT_TIMING(decoder->timings[3], decoder->protocol->timings.bit1_mark, bit_tolerance)) {
status = DecodeStatusReady;
decoder->timings_cnt = 0;
} else {
status = DecodeStatusError;
}
return status;
}
void* irda_decoder_nec_alloc(void) {
return irda_common_decoder_alloc(&protocol_nec);
}
void* irda_decoder_necext_alloc(void) {
return irda_common_decoder_alloc(&protocol_necext);
}
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);
}