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https://github.com/KostyaSha/arduino-iebus.git
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109 lines
3.5 KiB
C++
109 lines
3.5 KiB
C++
/*
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AVCLanDrv.h v.01 - AVCLan Library for 'duino / Wiring
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Created by Kochetkov Aleksey, 30.06.2009
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*/
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#ifndef AVCLanDrv_h
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#define AVCLanDrv_h
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#include "WProgram.h"
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#include "config.h"
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#ifdef AVCLAN_RESISTOR
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// avclan driver on resistor
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#define INPUT_IS_SET (ACSR & _BV(ACO))
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#define INPUT_IS_CLEAR (!(ACSR & _BV(ACO)))
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#define OUTPUT_SET_1 sbi(PORTD, DATAOUT);
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#define OUTPUT_SET_0 cbi(PORTD, DATAOUT);
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#define AVC_OUT_EN sbi(PORTD, DATAOUT); sbi(DDRD, DATAOUT); sbi(DDRD, DATAIN); sbi(ACSR, ACD);
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#define AVC_OUT_DIS cbi(PORTD, DATAOUT); cbi(DDRD, DATAOUT); cbi(DDRD, DATAIN); cbi(ACSR, ACD);
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#else
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#ifdef AVCLAN_ST485
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// avclan driver on ST485
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#define INPUT_IS_SET (bit_is_clear(DATAIN_PIN, DATAIN))
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#define INPUT_IS_CLEAR (bit_is_set(DATAIN_PIN, DATAIN))
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#define OUTPUT_SET_1 (cbi(DATAOUT_PORT, DATAOUT));
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#define OUTPUT_SET_0 (sbi(DATAOUT_PORT, DATAOUT));
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#define AVC_OUT_EN (sbi(OUTEN_PORT, OUTEN));;
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#define AVC_OUT_DIS (cbi(OUTEN_PORT, OUTEN));;
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#else
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//avclan driver on PCA82C250 & LM239N
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#define INPUT_IS_SET (bit_is_set(DATAIN_PIN, DATAIN))
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#define INPUT_IS_CLEAR (bit_is_clear(DATAIN_PIN, DATAIN))
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#define OUT_SET_1 (cbi(DATAOUT_PORT, DATAOUT));
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#define OUT_SET_0 (sbi(DATAOUT_PORT, DATAOUT));
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#define AVC_OUT_EN ;
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#define AVC_OUT_DIS ;
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#endif
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#endif
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#define AVC_NORMAL_BIT_LENGTH 0x4A // 37 * (F_CPU / 1000000L / 8)
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#define AVC_BIT_1_HOLD_ON_LENGTH 0x28 // 20 uS * (F_CPU / 1000000L / 8)
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#define AVC_BIT_0_HOLD_ON_LENGTH 0x40 // 32 uS * (F_CPU / 1000000L / 8)
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//#define AVC_BIT_0_HOLD_ON_MIN_LENGTH 0x34 // 26 uS * (F_CPU / 1000000L / 8) Compare half way between a '1' (20 us) and a '0' (32 us ): 32 - (32 - 20) /2 = 26 us
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#define AVC_BIT_0_HOLD_ON_MIN_LENGTH 0x3C // 30 uS * (F_CPU / 1000000L / 8) Compare half way between a '1' (20 us) and a '0' (32 us ): 32 - (32 - 20) /2 = 26 us
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#define AVC_START_BIT_LENGTH 0x5D // 186 uS * (F_CPU / 1000000L / 32) , prescaler 32
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#define AVC_START_BIT_HOLD_ON_LENGTH 0x54 // 168 uS * (F_CPU / 1000000L / 32) prescaler 32
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#define AVC_START_BIT_HOLD_ON_MIN_LENGTH 0x16 // 44 uS * (F_CPU / 1000000L / 32) grater that AVC_NORMAL_BIT_LENGTH, prescaler 32
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#define AVC_1U_LENGTH 0x02 // 1 uS * (F_CPU / 1000000L / 8)
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#define AVC_MAXMSGLEN 32
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#define AVC_CONTROL_FLAGS 0xF
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typedef enum
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{ // No this is not a mistake, broadcast = 0!
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AVC_MSG_NORMAL = 1,
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AVC_MSG_BROADCAST = 0
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} AvcTransmissionMode;
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typedef enum
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{
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ACT_NONE,
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// ACT_AUX_IN_USE,
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// ACT_TUNER_IN_USE,
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// ACT_TAPE_IN_USE,
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// ACT_CD_IN_USE,
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// ACT_EJECT_CD,
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// ACT_NO_CD,
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// ACT_STATUS,
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// ACT_REGISTER,
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// ACT_INIT,
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// ACT_CHECK
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} AvcActionID;
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#ifndef cbi
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#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit))
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#endif
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#ifndef sbi
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#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))
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#endif
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class AVCLanDrv{
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public:
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bool broadcast;
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word masterAddress;
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word slaveAddress;
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word deviceAddress;
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byte dataSize;
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byte message[AVC_MAXMSGLEN];
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void begin ();
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byte readMessage ();
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byte sendMessage (void);
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void printMessage(bool incoming);
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bool isAvcBusFree (void);
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private:
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bool _parityBit;
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word readBits (byte nbBits);
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void sendStartBit (void);
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void send1BitWord (bool data);
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void send4BitWord (byte data);
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void send8BitWord (byte data);
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void send12BitWord (word data);
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bool readAcknowledge (void);
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bool handleAcknowledge (void);
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};
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#endif
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