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https://github.com/Oleg-Stepanenko-owo/IEBUS
synced 2025-10-30 18:07:11 +00:00
update timers for D5,D6 pins
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OlegStepanenko_noute
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commit
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@ -39,13 +39,13 @@ void AVCLanDrv::begin ()
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#if defined(__AVR_ATmega8__)
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// ASSR=0x00;
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TCCR2 = 0x02;
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// TCNT2=0x00;
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// TCNT0=0x00;
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// OCR2=0x00;
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#else // ATMega168
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// ASSR=0x00;
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// TCCR2A=0x00;
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TCCR2B = 0x02;
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// TCNT2=0x00;
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TCCR0B = 0x02;
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// TCNT0=0x00;
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// OCR2A=0x00;
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// OCR2B=0x00;
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#endif
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@ -75,18 +75,18 @@ word AVCLanDrv::readBits (byte nbBits)
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}
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// Reset timer to measure bit length.
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TCNT2 = 0;
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TCNT0 = 0;
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// Wait until falling edge.
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while (INPUT_IS_SET);
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// Compare half way between a '1' (20 us) and a '0' (32 us ): 32 - (32 - 20) /2 = 26 us
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if (TCNT2 < AVC_BIT_0_HOLD_ON_MIN_LENGTH) {
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if (TCNT0 < AVC_BIT_0_HOLD_ON_MIN_LENGTH) {
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// Set new bit.
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data |= 0x0001;
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// Adjust parity.
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_parityBit = !_parityBit;
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}
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}
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while (INPUT_IS_CLEAR && TCNT2 < AVC_NORMAL_BIT_LENGTH);
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while (INPUT_IS_CLEAR && TCNT0 < AVC_NORMAL_BIT_LENGTH);
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// char buff[10] = {0};
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// sprintf(buff, "%x", data );
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@ -106,18 +106,18 @@ byte AVCLanDrv::_readMessage ()
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// Start bit.
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while (INPUT_IS_CLEAR);
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TCCR2B = 0x03; // prescaler 32
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TCNT2 = 0;
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TCCR0B = 0x03; // prescaler 32
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TCNT0 = 0;
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// Wait until falling edge.
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while (INPUT_IS_SET) {
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t = TCNT2;
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t = TCNT0;
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if (t > 0xFF) {
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TCCR2B = 0x02; // prescaler 8
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TCCR0B = 0x02; // prescaler 8
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SREG = oldSREG;
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return 1;
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}
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}
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TCCR2B = 0x02; // prescaler 8
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TCCR0B = 0x02; // prescaler 8
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if (t < AVC_START_BIT_HOLD_ON_MIN_LENGTH) {
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//if (t < 0x16){
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@ -231,17 +231,17 @@ byte AVCLanDrv::readMessage ()
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////--------------------------------------------------------------------------------
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//{
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// // Reset timer to measure bit length.
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// TCCR2B = 0x03; // prescaler 32
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// TCNT2 = 0;
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// TCCR0B = 0x03; // prescaler 32
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// TCNT0 = 0;
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// OUTPUT_SET_1;
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//
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// // Pulse level high duration.
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// while ( TCNT2 < AVC_START_BIT_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_START_BIT_HOLD_ON_LENGTH );
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// OUTPUT_SET_0;
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//
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// // Pulse level low duration until ~185 us.
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// while ( TCNT2 < AVC_START_BIT_LENGTH );
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// TCCR2B = 0x02; // prescaler 8
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// while ( TCNT0 < AVC_START_BIT_LENGTH );
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// TCCR0B = 0x02; // prescaler 8
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//
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//}
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@ -251,17 +251,17 @@ void AVCLanDrv::send1BitWord (bool data)
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//--------------------------------------------------------------------------------
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{
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// Reset timer to measure bit length.
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TCNT2 = 0;
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TCNT0 = 0;
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OUTPUT_SET_1;
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if (data) {
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while (TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH);
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while (TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH);
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} else {
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while (TCNT2 < AVC_BIT_0_HOLD_ON_LENGTH);
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while (TCNT0 < AVC_BIT_0_HOLD_ON_LENGTH);
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}
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OUTPUT_SET_0;
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while (TCNT2 < AVC_NORMAL_BIT_LENGTH);
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while (TCNT0 < AVC_NORMAL_BIT_LENGTH);
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}
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//// Send a 4 bit word to the AVCLan
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@ -274,20 +274,20 @@ void AVCLanDrv::send1BitWord (bool data)
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// // Most significant bit out first.
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// for ( char nbBits = 0; nbBits < 4; nbBits++ ) {
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// // Reset timer to measure bit length.
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// TCNT2 = 2;
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// TCNT0 = 2;
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// OUTPUT_SET_1;
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//
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// if (data & 0x8) {
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// // Adjust parity.
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// _parityBit = ! _parityBit;
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// while ( TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH );
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// } else {
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// while ( TCNT2 < AVC_BIT_0_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_0_HOLD_ON_LENGTH );
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// }
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//
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// OUTPUT_SET_0;
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// // Hold output low until end of bit.
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// while ( TCNT2 < AVC_NORMAL_BIT_LENGTH );
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// while ( TCNT0 < AVC_NORMAL_BIT_LENGTH );
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//
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// // Fetch next bit.
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// data <<= 1;
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@ -304,20 +304,20 @@ void AVCLanDrv::send1BitWord (bool data)
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// // Most significant bit out first.
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// for ( char nbBits = 0; nbBits < 8; nbBits++ ) {
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// // Reset timer to measure bit length.
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// TCNT2 = 2;
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// TCNT0 = 2;
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// OUTPUT_SET_1;
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//
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// if (data & 0x80) {
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// // Adjust parity.
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// _parityBit = ! _parityBit;
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// while ( TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH );
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// } else {
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// while ( TCNT2 < AVC_BIT_0_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_0_HOLD_ON_LENGTH );
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// }
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//
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// OUTPUT_SET_0;
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// // Hold output low until end of bit.
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// while ( TCNT2 < AVC_NORMAL_BIT_LENGTH );
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// while ( TCNT0 < AVC_NORMAL_BIT_LENGTH );
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//
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// // Fetch next bit.
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// data <<= 1;
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@ -334,20 +334,20 @@ void AVCLanDrv::send1BitWord (bool data)
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// // Most significant bit out first.
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// for ( char nbBits = 0; nbBits < 12; nbBits++ ) {
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// // Reset timer to measure bit length.
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// TCNT2 = 2;
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// TCNT0 = 2;
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// OUTPUT_SET_1;
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//
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// if (data & 0x0800) {
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// // Adjust parity.
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// _parityBit = ! _parityBit;
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// while ( TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH );
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// } else {
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// while ( TCNT2 < AVC_BIT_0_HOLD_ON_LENGTH );
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// while ( TCNT0 < AVC_BIT_0_HOLD_ON_LENGTH );
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// }
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//
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// OUTPUT_SET_0;
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// // Hold output low until end of bit.
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// while ( TCNT2 < AVC_NORMAL_BIT_LENGTH );
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// while ( TCNT0 < AVC_NORMAL_BIT_LENGTH );
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//
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// // Fetch next bit.
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// data <<= 1;
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@ -361,11 +361,11 @@ bool AVCLanDrv::isAvcBusFree (void)
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//--------------------------------------------------------------------------------
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{
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// Reset timer.
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TCNT2 = 0;
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TCNT0 = 0;
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while (INPUT_IS_CLEAR) {
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// We assume the bus is free if anything happens for the length of 1 bit.
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if (TCNT2 > AVC_NORMAL_BIT_LENGTH) {
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if (TCNT0 > AVC_NORMAL_BIT_LENGTH) {
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return true;
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}
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}
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@ -384,21 +384,21 @@ bool AVCLanDrv::isAvcBusFree (void)
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// // taken over the bus maintaining the pulse until the equivalent of a bit '0' (32 us) is formed.
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//
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// // Reset timer to measure bit length.
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// TCNT2 = 0;
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// TCNT0 = 0;
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// OUTPUT_SET_1;
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//
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// // Generate bit '0'.
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// while (TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH);
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// while (TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH);
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// OUTPUT_SET_0;
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//
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// AVC_OUT_DIS;
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//
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// while (TCNT2 < AVC_BIT_1_HOLD_ON_LENGTH + AVC_1U_LENGTH);
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// while (TCNT0 < AVC_BIT_1_HOLD_ON_LENGTH + AVC_1U_LENGTH);
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// // Measure final resulting bit.
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// while ( INPUT_IS_SET );
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//
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// // Sample half-way through bit '0' (26 us) to detect whether the target is acknowledging.
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// if (TCNT2 > AVC_BIT_0_HOLD_ON_MIN_LENGTH) {
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// if (TCNT0 > AVC_BIT_0_HOLD_ON_MIN_LENGTH) {
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// // Slave is acknowledging (ack = 0). Wait until end of ack bit.
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// while (INPUT_IS_SET );
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// AVC_OUT_EN;
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@ -13,17 +13,17 @@
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//********** arduino & driver based on PCA82C250 **********
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#ifdef AVCLAN_PCA82C250
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#define AVCLANDRIVER_TYPE "Arduino - PCA82C250"
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// define out pin (pin 8 arduino)
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// define out pin (pin D6 arduino)
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#define DATAOUT_DDR DDRD
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#define DATAOUT_PORT PORTD
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#define DATAOUT_PIN PIND
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#define DATAOUT 7
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#define DATAOUT 6
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// define in pin (pin 9 arduino)
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// define in pin (pin D5 arduino)
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#define DATAIN_DDR DDRD
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#define DATAIN_PORT PORTD
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#define DATAIN_PIN PIND
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#define DATAIN 6
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#define DATAIN 5
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// LED connected to digital pin 13
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#define LED_DDR DDRC
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