61 lines
1.5 KiB
C++
61 lines
1.5 KiB
C++
#ifndef HDLC_AFSK_TX_H
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#define HDLC_AFSK_TX_H
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#include "hdlcFramesBuffer.h"
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#define AFSK_PIN_COUNT 4
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#define AFSK_PIN_4 4
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#define AFSK_PIN_5 5
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#define AFSK_PIN_6 6
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#define AFSK_PIN_7 7
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#define AFSK_MASK 0xf0
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#define NON_AFSK_MASK 0x0f
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#define SIN_TABLE_SIZE 48
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#define MARK_SAMPLE_DEG_STEP 6
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#define SPACE_SAMPLE_DEG_STEP 11
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#define MAX_BIT_SAMPLE_INDEX 7
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#define ANALOG_ZERO 0x80
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#define MASK_RESET_VALUE 0x01
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#define MAX_BIT_INDEX 7
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#define TX_FRAME_PREAMBLE 0
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#define TX_FRAME_BEGIN 1
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#define TX_FRAME_DATA 2
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#define TX_FRAME_END 3
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#define MAX_ONES_WITHOUT_STUFFING 4
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#define DEFAULT_PREAMBLE_COUNT 75
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class HdlcAfskTx {
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public:
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HdlcAfskTx(HdlcFrameBuffer* txBuffer);
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boolean loopbackTest=false;
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byte encodeSample();
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void start();
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boolean getReady();
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void setTxDelay(int val);
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private:
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HdlcFrameBuffer* _txBuffer;
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int _pins[AFSK_PIN_COUNT] = {AFSK_PIN_7, AFSK_PIN_6, AFSK_PIN_5, AFSK_PIN_4};
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int _n7_5deg = 0;
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int _n7_5degTest = 0;
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int _bitSampleCounter = 0;
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boolean _mark = true;
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boolean _runToZero = false;
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boolean _ready = true;
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byte _afskByte = HDLC_FLAG;
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byte _afskBitMask = MASK_RESET_VALUE;
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int frameTxState = TX_FRAME_PREAMBLE;
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int _afskBitPtr = 0;
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int _preambleCount = DEFAULT_PREAMBLE_COUNT;
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int _preampCountDown = DEFAULT_PREAMBLE_COUNT;
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boolean _enableStuffBit = false;
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boolean _stuffBit = false;
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int _oneCounter = 0;
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boolean getNextMark(boolean* current);
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};
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#endif
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