flipperzero-firmware/lib/irda/encoder_decoder/irda.h

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#pragma once
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
#endif
#define IRDA_COMMON_CARRIER_FREQUENCY 38000
#define IRDA_COMMON_DUTY_CYCLE 0.33
/* if we want to see splitted raw signals during brutforce,
* we have to have RX raw timing delay less than TX */
#define IRDA_RAW_RX_TIMING_DELAY_US 150000
#define IRDA_RAW_TX_TIMING_DELAY_US 180000
typedef struct IrdaDecoderHandler IrdaDecoderHandler;
typedef struct IrdaEncoderHandler IrdaEncoderHandler;
typedef enum {
IrdaProtocolUnknown = -1,
IrdaProtocolNEC = 0,
IrdaProtocolNECext = 1,
IrdaProtocolSamsung32 = 2,
IrdaProtocolRC6 = 3,
IrdaProtocolRC5 = 4,
IrdaProtocolRC5X = 5,
IrdaProtocolSIRC = 6,
IrdaProtocolSIRC15 = 7,
IrdaProtocolSIRC20 = 8,
IrdaProtocolMAX,
} IrdaProtocol;
typedef struct {
IrdaProtocol protocol;
uint32_t address;
uint32_t command;
bool repeat;
} IrdaMessage;
typedef enum {
IrdaStatusError,
IrdaStatusOk,
IrdaStatusDone,
IrdaStatusReady,
} IrdaStatus;
/**
* Initialize decoder.
*
* \return returns pointer to IRDA decoder handler if success, otherwise - error.
*/
IrdaDecoderHandler* irda_alloc_decoder(void);
/**
* Provide to decoder next timing.
*
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* \param[in] handler - handler to IRDA decoders. Should be acquired with \c irda_alloc_decoder().
* \param[in] level - high(true) or low(false) level of input signal to analyze.
* it should alternate every call, otherwise it is an error case,
* and decoder resets its state and start decoding from the start.
* \param[in] duration - duration of steady high/low input signal.
* \return if message is ready, returns pointer to decoded message, returns NULL.
* Note: ownership of returned ptr belongs to handler. So pointer is valid
* up to next irda_free_decoder(), irda_reset_decoder(),
* irda_decode(), irda_check_decoder_ready() calls.
*/
const IrdaMessage* irda_decode(IrdaDecoderHandler* handler, bool level, uint32_t duration);
/**
* Check whether decoder is ready.
* Functionality is quite similar to irda_decode(), but with no timing providing.
* Some protocols (e.g. Sony SIRC) has variable payload length, which means we
* can't recognize end of message right after receiving last bit. That's why
* application should call to irda_check_decoder_ready() after some timeout to
* retrieve decoded message, if so.
*
* \param[in] handler - handler to IRDA decoders. Should be acquired with \c irda_alloc_decoder().
* \return if message is ready, returns pointer to decoded message, returns NULL.
* Note: ownership of returned ptr belongs to handler. So pointer is valid
* up to next irda_free_decoder(), irda_reset_decoder(),
* irda_decode(), irda_check_decoder_ready() calls.
*/
const IrdaMessage* irda_check_decoder_ready(IrdaDecoderHandler* handler);
/**
* Deinitialize decoder and free allocated memory.
*
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* \param[in] handler - handler to IRDA decoders. Should be acquired with \c irda_alloc_decoder().
*/
void irda_free_decoder(IrdaDecoderHandler* handler);
/**
* Reset IRDA decoder.
*
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* \param[in] handler - handler to IRDA decoders. Should be acquired with \c irda_alloc_decoder().
*/
void irda_reset_decoder(IrdaDecoderHandler* handler);
/**
* Get protocol name by protocol enum.
*
* \param[in] protocol - protocol identifier.
* \return string to protocol name.
*/
const char* irda_get_protocol_name(IrdaProtocol protocol);
/**
* Get protocol enum by protocol name.
*
* \param[in] protocol_name - string to protocol name.
* \return protocol identifier.
*/
IrdaProtocol irda_get_protocol_by_name(const char* protocol_name);
/**
* Get address length by protocol enum.
*
* \param[in] protocol - protocol identifier.
* \return length of address in bits.
*/
uint8_t irda_get_protocol_address_length(IrdaProtocol protocol);
/**
* Get command length by protocol enum.
*
* \param[in] protocol - protocol identifier.
* \return length of command in bits.
*/
uint8_t irda_get_protocol_command_length(IrdaProtocol protocol);
/**
* Checks whether protocol valid.
*
* \param[in] protocol - protocol identifier.
* \return true if protocol is valid, false otherwise.
*/
bool irda_is_protocol_valid(IrdaProtocol protocol);
/**
* Allocate IRDA encoder.
*
* \return encoder handler.
*/
IrdaEncoderHandler* irda_alloc_encoder(void);
/**
* Free encoder handler previously allocated with \c irda_alloc_encoder().
*
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* \param[in] handler - handler to IRDA encoder. Should be acquired with \c irda_alloc_encoder().
*/
void irda_free_encoder(IrdaEncoderHandler* handler);
/**
* Encode previously set IRDA message.
* Usage:
* 1) alloc with \c irda_alloc_encoder()
* 2) set message to encode with \c irda_reset_encoder()
* 3) call for \c irda_encode() to continuously get one at a time timings.
* 4) when \c irda_encode() returns IrdaStatusDone, it means new message is fully encoded.
* 5) to encode additional timings, just continue calling \c irda_encode().
*
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* \param[in] handler - handler to IRDA encoder. Should be acquired with \c irda_alloc_encoder().
* \param[out] duration - encoded timing.
* \param[out] level - encoded level.
*
* \return status of encode operation.
*/
IrdaStatus irda_encode(IrdaEncoderHandler* handler, uint32_t* duration, bool* level);
/**
* Reset IRDA encoder and set new message to encode. If it's not called after receiveing
* IrdaStatusDone in \c irda_encode(), encoder will encode repeat messages
* till the end of time.
*
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* \param[in] handler - handler to IRDA encoder. Should be acquired with \c irda_alloc_encoder().
* \param[in] message - message to encode.
*/
void irda_reset_encoder(IrdaEncoderHandler* handler, const IrdaMessage* message);
/**
* Get PWM frequency value for selected protocol
*
* \param[in] protocol - protocol to get from PWM frequency
*
* \return frequency
*/
uint32_t irda_get_protocol_frequency(IrdaProtocol protocol);
/**
* Get PWM duty cycle value for selected protocol
*
* \param[in] protocol - protocol to get from PWM duty cycle
*
* \return duty cycle
*/
float irda_get_protocol_duty_cycle(IrdaProtocol protocol);
#ifdef __cplusplus
}
#endif