📄 mnet.c
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// M-Net Communication Rountine
// Ver: 1
// Brian Lam 2006-6-3
// Timer 2 to Calu the Input Wave
#include <util/delay.h>
#include <avr/io.h>
#include <avr/interrupt.h>
#include <avr/pgmspace.h>
//#include <avr/signal.h>
#include <inttypes.h>
#include "main.h"
#include <avr/eeprom.h>
extern unsigned char Id1_Eeprom[cIDMax] __attribute__((section(".eeprom")));
extern unsigned char Id2_Eeprom[cIDMax] __attribute__((section(".eeprom")));
extern unsigned char Key_Eeprom[cIDMax] __attribute__((section(".eeprom")));
extern unsigned char Path_Eeprom[cIDMax] __attribute__((section(".eeprom")));
extern unsigned char Path2_Eeprom[cIDMax] __attribute__((section(".eeprom")));
extern unsigned char RecodeNM_Eeprom __attribute__((section(".eeprom")));
extern unsigned char LeftNM_Eeprom[4] __attribute__((section(".eeprom")));
//extern unsigned char RightNM_Eeprom[4] __attribute__((section(".eeprom")));
extern unsigned char ID_HEeprom __attribute__((section(".eeprom")));
extern unsigned char ID_LEeprom __attribute__((section(".eeprom")));
//extern unsigned char RFKey_Eeprom __attribute__((section(".eeprom")));
// INT0 的下降沿产生异步中断请求
struct MNetBuff MNetRxTmp;
struct MNetBuff MNetTx;
unsigned int mRandomTm; // Genera Random Timing
//----------------- Function List -----------------------------------
void fnCpTxFifoToTm(void); // Copy FIFO Buffer NetTxBuf to MNetTx
void MNetTxMod(void);
unsigned char mRq232TxStatus;
#define mRqRx 0
unsigned char MNetRxErr =0;
#define MNetOverFlow
unsigned char MNetRxFlag =0;
#define MRxBitV 0
#define MRxFErr 1
#define MRxBitF 2
unsigned char MNetTxFlag;
#define MTxBuzz 0
#define MTxErr 1 // Packet Transmit Fault
#define MTxTmOver 2 // Network too buzzy or Net Work Fault
unsigned char MNetIdle=0; // Set When Transmition is Idle
unsigned char MRxStatus = 0;
#define Timer2Off() (TCCR2B &= 0b11111000)
#define Timer2On() (TCCR2B |= 0b1) //clkI/O/1 ( 无预分频)
#define cBitCheck 100
#define cBit1Tx 240 // n /8 us = 30us (3.3k)
#define cBit0Tx 400 // n /8 us = 50us (20k)
#define cBit1RxLw 120 // n /8 us
#define cBit1RxUp 320 // n /8 us
#define cBit0RxLw 320 // n /8 us
#define cBit0RxUp 500 // n /8 us
#define cNetIdleTm 10000 // n us = 10ms
#define cNetIdelTm_Tx 2000 // n us = 2ms
#define cTxRdDelay 19 // 3 x N Mach Cycle
const unsigned char tbOddParity[] PROGMEM= {\
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,\
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,\
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,\
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,\
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,\
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,\
1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1,0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,\
0,1,1,0,1,0,0,1,1,0,0,1,0,1,1,0,1,0,0,1,0,1,1,0,0,1,1,0,1,0,0,1
};
void fnMNetDetermine(void)
{
//unsigned char i;
switch ( MNetRxTmp.Buf[1] )
{
case 1: // 系统 ---------------------------------------------------------
break;
case 2: // 通讯设备 ------------------------------------------------------
break;
case 4: // 安防 -------------------------------------------------------------
break;
case 8: // 设备控制
{
switch ( MNetRxTmp.Buf[2] )
{
case 0x01: fnRx0801_Code();
break;//目标名称控制
case 0x02:
break;//目标ID控制
case 0x11: fnRx0811_Code();
break;//ID间接控制
case 0x03:
break;//状态反馈
}
}break;
}
}
void fnRx0801_Code(void)
{
}
void fnRx0811_Code(void)
{
}
void MNetInitRx(void)
{
// 信号输出 PB1 OC1A/PCINT1
// 信号输入 PB0 PCINT0/ICP1 = PD2 (PCINT18/INT0)
MNetIdle = 0;
PORTB &= 0b11111100;
DDRB &= 0b11111100;
EICRA |= _BV(ISC01); // INT0 的下降沿产生异步中断请求
SetBit(EIFR,INTF0); //标志位也可以通过写入”1” 来清零
SetBit(EIMSK,INT0); //外部中断请求0 使能
}
void MNetRxTmCapture_On(void)
{
TCCR1A &= ~(_BV(COM1A1)|_BV(COM1A0)); // 普通端口操作，非OC1A/OC1B 功能
// TCCR1B = _BV(ICNC1)| _BV(CS10); // 捕捉噪声抑制, 下降沿触发, 普通模
TCCR1B = _BV(CS10); // 捕捉噪声抑制, 下降沿触发, 普通模
TCNT1 =0;
OCR1A = cBit1RxLw; // Set Hig Feq
OCR1B = cBit1RxUp;
ICR1 = cBit0RxUp; // Lowwer Feq.
SetBit( TIMSK1,ICIE1); // 输入捕捉中断使能
TIFR1 = _BV(ICF1)|_BV(OCF1B)|_BV(OCF1A)|_BV(TOV1); // 清除该标志 ICF1 – – OCF1B OCF1A TOV1
}
void MNetInitClose()
{
// 信号输出 PB1 OC1A/PCINT1
// 信号输入 PB0 PCINT0/ICP1 = PD2 (PCINT18/INT0)
ClrBit(EIMSK,INT0); //外部中断请求0 屏蔽
ClrBit(TIMSK1,ICIE1); // 输入捕捉中断屏蔽
TCCR1A &= ~(_BV(COM1A1)|_BV(COM1A0)); // 普通端口操作，非OC1A/OC1B 功能
TCCR1B = 0; //无时钟源 (T/C 停止)
TCNT1 =0;
OCR1A = cNetIdleTm; // Set Hig Feq
OCR1B = cNetIdleTm + cNetIdelTm_Tx + (mRandomTm & 0x07FF) ;
TIFR1 = _BV(ICF1)|_BV(OCF1B)|_BV(OCF1A)|_BV(TOV1); // 清除该标志 ICF1 – – OCF1B OCF1A TOV1
MNetIdle =1;
}
void MNetInitIdel()
{
// 信号输出 PB1 OC1A/PCINT1
// 信号输入 PB0 PCINT0/ICP1 = PD2 (PCINT18/INT0)
ClrBit(EIMSK,INT0); //外部中断请求0 屏蔽
ClrBit(TIMSK1,ICIE1); // 输入捕捉中断屏蔽
TCCR1A &= ~(_BV(COM1A1)|_BV(COM1A0)); // 普通端口操作，非OC1A/OC1B 功能
// TCCR1B = _BV(ICNC1)| _BV(CS11); // 捕捉噪声抑制, 下降沿触发, clkI /8
TCCR1B = _BV(CS11); // 捕捉噪声抑制, 下降沿触发, clkI /8
// PORTB &= 0b11111100; //
// DDRB &= 0b11111100; //
TCNT1 =0;
OCR1A = cNetIdleTm; // Set Hig Feq
OCR1B = cNetIdleTm + cNetIdelTm_Tx + (mRandomTm & 0x07FF) ;
TIFR1 = _BV(ICF1)|_BV(OCF1B)|_BV(OCF1A)|_BV(TOV1); // 清除该标志 ICF1 – – OCF1B OCF1A TOV1
MNetIdle =1;
}
#define cRxTmOver 200
#define mcDecodeBit() mTm = cRxTmOver; while (bit_is_clear(MNetRxFlag,MRxBitF)) { if (!(--mTm)) goto lbMNetRxErrOver; } if (bit_is_set(MNetRxFlag,MRxFErr)) goto lbMNetRxErrShort; ClrBit(MNetRxFlag,MRxBitF)
SIGNAL(SIG_INTERRUPT0) // M-Net Data Input Interrupt, Use to Cal the Wave Len with Timer 2
{
unsigned char mTm;
unsigned char mi;
unsigned char *mj;
unsigned char mRxData;
unsigned char Parity;
unsigned char mCheckSum;
unsigned char mLen;
ClrBit(EIMSK,INT0); //外部中断请求0 屏蔽
MNetRxTmCapture_On();
sei();
mTm = cRxTmOver;
while (bit_is_clear(MNetRxFlag,MRxBitF)) //第一位不要
{
if (!(--mTm)) break; // Time Out
}
MNetRxFlag=0;
while (bit_is_clear(MNetRxFlag,MRxBitF)) //第2位不要
{
if (!(--mTm)) goto lbMNetRxErr; // Time Out
}
MNetRxFlag=0;
mi = 8;
while(1) // Wait Start Bit
{
mTm = cRxTmOver;
while (bit_is_clear(MNetRxFlag,MRxBitF)) //第一位不要
{
if (!(--mTm)) goto lbMNetRxErr; // Time Out
}
if (bit_is_set(MNetRxFlag,MRxFErr)) goto lbMNetRxErr;
ClrBit(MNetRxFlag,MRxBitF);
if (bit_is_set(MNetRxFlag,MRxBitV)) break; // If Start Bit then Break
if (!(--mi) ) goto lbMNetRxErrSB; // No Start Bit
}
mRxData=0;
for(mi=2; mi>0; mi--)
{
mcDecodeBit();
mRxData <<=1;
if (bit_is_set(MNetRxFlag,MRxBitV)) mRxData++;
}
MNetRxTmp.Try = mRxData;
mLen=0;
for(mi=6; mi>0; mi--)
{
mcDecodeBit();
mLen <<=1;
if (bit_is_set(MNetRxFlag,MRxBitV)) mLen++;
}
mRxData = mRxData + mLen;
Parity = (unsigned char) pgm_read_byte_near(tbOddParity+mRxData);
mcDecodeBit();
if (Parity )
{
if (bit_is_clear(MNetRxFlag,MRxBitV)) goto lbMNetRxErr;
}
else if (bit_is_set(MNetRxFlag,MRxBitV)) goto lbMNetRxErr ;
if (mLen >40 ) goto lbMNetRxErr;
MNetRxTmp.Buf[0] = mLen;
mj = &MNetRxTmp.Buf[1];
mCheckSum = 0;
do
{
mRxData=0;
for(mi=8; mi>0; mi--)
{
mcDecodeBit();
mRxData <<=1;
if (bit_is_set(MNetRxFlag,MRxBitV)) mRxData++;
}
Parity = (unsigned char) pgm_read_byte_near(tbOddParity+mRxData);
mcDecodeBit();
if (Parity )
{
if (bit_is_clear(MNetRxFlag,MRxBitV)) goto lbMNetRxErrPar;
}
else if (bit_is_set(MNetRxFlag,MRxBitV)) goto lbMNetRxErrPar ;
*mj = mRxData;
mCheckSum+=mRxData;
mj++;
mLen--;
}while (mLen);
if (mCheckSum) goto lbMNetRxErrCS; // CheckSum Err
SetBit (MNetRxFlag,cNetRx); // Bit Set and the Main Rountine will copy MNetRx[j].Buf[i] =MNetRxTmp.Buf[i];
MNetInitIdel();
mcLed2Tg();
return;
lbMNetRxErrShort:
lbMNetRxErrOver:
lbMNetRxErrPar:
lbMNetRxErrCS:
lbMNetRxErrSB:
lbMNetRxErr:
mcLed1Tg();
MNetInitIdel();
}
extern void (*RS232TxPt)(void); // Point to Job
extern void RS232TxData(void);
extern unsigned char RS232Flag;
#define RSTxRq 0 // If Set, Tx Request ( M-Net Receive Data)
#define RxTxFn 1 // If Set, One Tx to PC Complete and Wait PC FeedBack
#define RSEr 2
#define RSComp 3 // 补码
void MNetTxMod()
{
// 信号输出 PB1 OC1A/PCINT1
// 信号输入 PB0 PCINT0/ICP1 = PD2 (PCINT18/INT0)
unsigned char i,k;
unsigned char mData,Parity;
unsigned char mLen;
ClrBit(TIMSK1,ICIE1); // 输入捕捉中断屏蔽
ClrBit(EIMSK,INT0); //外部中断请求0 屏蔽
TCNT1 =0;
OCR1A = cBit0Tx/2;
OCR1B = cBitCheck /2;
TCCR1B = _BV(ICNC1)| _BV(WGM12)| _BV(CS10); // 捕捉噪声抑制, 下降沿触发, clkI
SetBit(TCCR1A,COM1A0); // 比较匹配时OC1A 电平取反
SetBit(PORTB,PB1); // Output Hight
SetBit(DDRB,DDB1); // Set PB1 Output Mode
TIFR1 = _BV(ICF1)|_BV(OCF1B)|_BV(OCF1A)|_BV(TOV1); // 清除该标志 ICF1 – – OCF1B OCF1A TOV1
if (bit_is_clear(PINB,PB1)) SetBit(TCCR1C,FOC1A); //Match OC1A Output *** Cannot Read (bit_is_set(PINB,1))
// Send Syn Bit
mData = 0x1;
i = 8;
do
{
if (bit_is_set(mData,7)) OCR1A = cBit1Tx/2;
else OCR1A = cBit0Tx/2;
mData<<=1;
while (bit_is_clear(TIFR1,OCF1A)); // O/P H to L
SetBit(TIFR1,OCF1A);
_delay_loop_1(cTxRdDelay); // 1+ 3xn
if ( bit_is_clear(PINB,0) ) goto lbMNetTxErr1;
while (bit_is_clear(TIFR1,OCF1A)); // O/P L to H
SetBit(TIFR1,OCF1A);
}while (--i);
k=0;
mLen = MNetTx.Buf[0] + 1;
MNetTx.Buf[0] = (MNetTx.Try<<6) + MNetTx.Buf[0];
do
{
mData = MNetTx.Buf[k];
Parity = (unsigned char) pgm_read_byte_near(tbOddParity+mData);
i = 8;
do
{
if (bit_is_set(mData,7)) OCR1A = cBit1Tx/2;
else OCR1A = cBit0Tx/2;
mData<<=1;
while (bit_is_clear(TIFR1,OCF1B));
if ( bit_is_set(PINB,0) ) goto lbMNetTxErr2 ; // O/P H to L
SetBit(TIFR1,OCF1B);
while (bit_is_clear(TIFR1,OCF1A)); // O/P H to L
SetBit(TIFR1,OCF1A);
while (bit_is_clear(TIFR1,OCF1B));
if ( bit_is_clear(PINB,0) ) goto lbMNetTxErr2; // O/P L to H
SetBit(TIFR1,OCF1B);
while (bit_is_clear(TIFR1,OCF1A)); // O/P L to H
SetBit(TIFR1,OCF1A);
}while (--i);
if (Parity) OCR1A = cBit1Tx/2;
else OCR1A = cBit0Tx/2;
while (bit_is_clear(TIFR1,OCF1B));
if ( bit_is_set(PINB,0) ) goto lbMNetTxErr2 ; // O/P H to L
SetBit(TIFR1,OCF1B);
while (bit_is_clear(TIFR1,OCF1A)); // O/P H to L
SetBit(TIFR1,OCF1A);
while (bit_is_clear(TIFR1,OCF1B));
if ( bit_is_clear(PINB,0) ) goto lbMNetTxErr2; // O/P L to H
SetBit(TIFR1,OCF1B);
while (bit_is_clear(TIFR1,OCF1A)); // O/P L to H
SetBit(TIFR1,OCF1A);
k++;
} while (--mLen);
while (bit_is_clear(TIFR1,OCF1A)); // End Bit
SetBit(TIFR1,OCF1A);
ClrBit(PORTB,PB1); // Output Hight
ClrBit(DDRB,DDB1); //
SetBit (TCCR1C,FOC1A); //Match OC1A Output
MNetTx.Buf[0] = MNetTx.Buf[0] & 0b111111;
MNetTxFlag = 0; // Tx Sucess
MNetTx.Try = 0;
MNetInitIdel();
mRq232TxStatus =1;
ClrBit(MNetStatus,cNet_Tx); // Set Tx Flag
if (bit_is_set(PINB,2)) SPDR = MNetStatus;
mcLed3Tg();
return;
lbMNetTxErr1: // Start Err
lbMNetTxErr2: // Data err
OCR1A = cBit0Tx/2;
i = 16;
if (bit_is_set(PINB,PB1)) i--;
do
{
while (bit_is_clear(TIFR1,OCF1A)); // O/P H to L
SetBit(TIFR1,OCF1A);
}while (--i);
MNetTx.Buf[0] = MNetTx.Buf[0] & 0b111111;
ClrBit(PORTB,PB1); // Output Hight
ClrBit(DDRB,DDB1); //
MNetInitIdel();
MNetTx.Try++ ;
if ( MNetTx.Try > 3 )
{
MNetTxFlag = _BV(MTxErr); // Set Transmit Err
ClrBit(MNetStatus,cNet_Tx); // Set Tx Flag
mRq232TxStatus =1;
}
mcLed1Tg();
}
void fnCpTxFifoToTm(void) // Copy FIFO Buffer NetTxBuf to MNetTx
{
unsigned char i,j;
mMNetTxCn--;
j=mMNetTxPt;
mMNetTxPt++;
if (mMNetTxPt>= cMNetTxPacketNm ) mMNetTxPt=0;
i = mMNetTxBuf[j].Buf[0] + 1;
do
{
i--;
MNetTx.Buf[i] = mMNetTxBuf[j].Buf[i];
} while (i);
SetBit(MNetTxFlag,0);
}
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