115 lines
3.1 KiB
C++
115 lines
3.1 KiB
C++
#ifndef fader_h
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#define fader_h
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/*
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1. wait for 0x0a packet
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send_response_0()
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wait 50 ms
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send_heart_beat()
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2. wait for next host packet
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send_response_1()
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*/
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class fader
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{
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public:
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typedef enum
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{
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kOkRC,
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kTimeOutRC,
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kUnknownMsgRC
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} rc_t;
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// Function to send TCP messages to the host.
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typedef void (*hostCallback_t)( void* arg, const void* buf, unsigned bufByteN );
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fader( printCallback_t printCbFunc, const unsigned char faderMac[6], uint32_t faderInetAddr, hostCallback_t hostCbFunc, void* cbArg, unsigned ticksPerHeartBeat, unsigned chN = 8 );
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virtual ~fader();
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// Called by the TCP receive function to update the faders state
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// based on host state changes.
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// Return kUnknownMsgRC if the received msg is not recognized.
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rc_t receive( const void* buf, unsigned bufByteN );
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rc_t receive_old( const void* buf, unsigned bufByteN );
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// Called by the application to drive time dependent functions.
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// Return kTimeOut if the protocol state machine has timed out.
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rc_t tick();
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// Call these function to generate messages to the host when
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// the controls physical state changes.
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rc_t physical_fader_touched( uint16_t chIdx );
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rc_t physical_fader_moved( uint16_t chIdx, uint16_t newPosition );
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rc_t physical_mute_switched( uint16_t chIdx, uint16_t newMuteFl );
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rc_t virtual_fader_moved( uint16_t chIdx, uint16_t newPosition );
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rc_t virtual_mute_switched( uint16_t chIdx, uint16_t newMuteFl );
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private:
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typedef enum
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{
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kWaitForHandshake_0_Id,
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kWaitForHandshake_Tick_Id,
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kWaitForHandshake_1_Id,
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kWaitForHeartBeat_Id
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} protoState_t;
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typedef struct
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{
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int16_t position;
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bool muteFl;
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bool incrFl;
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bool touchFl;
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} ch_t;
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typedef struct
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{
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uint16_t id; // message prefix - identifies the type of message
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uint16_t byteN; // length of the message in bytes
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} msgRef_t;
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static msgRef_t _msgRefA[];
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printCallback_t _printCbFunc;
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uint32_t _inetAddr;
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unsigned _tickN;
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ch_t* _chArray;
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unsigned _chN;
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hostCallback_t _hostCbFunc;
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void* _hostCbArg;
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protoState_t _protoState;
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unsigned char _mac[6];
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unsigned _ticksPerHeartBeat;
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uint8_t _msgTypeId; //
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unsigned _msgByteIdx; // current index into the message being parsed.
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unsigned _msgByteN; // count of bytes in the message currently being parsed
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unsigned char _msg[8]; //
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void _send_response_0();
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void _send_response_1();
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void _send_heartbeat();
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void _send( const void* buf, unsigned bufByteN );
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void _on_fader_receive( uint16_t chanIdx, uint16_t position );
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void _on_mute_receive( uint16_t chanIdx, bool muteFl );
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void _send_fader( uint16_t chIdx );
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void _send_touch( uint16_t chIdx, bool touchFl );
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void _send_mute( uint16_t chIdx, bool muteFl );
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void _auto_incr_fader( uint16_t chIdx );
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uint8_t _get_msg_byte_count( uint8_t msgTypeId );
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void _handleChMsg(const uint8_t* msg);
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void _on_msg_complete( const uint8_t typeId );
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};
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#endif
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