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Rev 470 Rev 482
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#define ONE_WIRE_PIN   PIN_A3 // pro pristup k cidlu jsem zvolil
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#define ONE_WIRE_PIN   PIN_A3 // pro pristup k cidlu jsem zvolil
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void onewire_reset()
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void onewire_reset()
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{
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{
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output_low(ONE_WIRE_PIN);
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output_low(ONE_WIRE_PIN);
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delay_us(500);
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delay_us(240);
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output_float(ONE_WIRE_PIN);
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output_float(ONE_WIRE_PIN);
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delay_us(500);
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delay_us(150);
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output_float(ONE_WIRE_PIN);
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output_float(ONE_WIRE_PIN);
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}
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}
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void onewire_write(int data)
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void onewire_write(int data)
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{
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{
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int count;
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int count;
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for (count=0; count<8; ++count)
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for (count=0; count<8; ++count)
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{
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{
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output_low(ONE_WIRE_PIN);
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output_low(ONE_WIRE_PIN);
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delay_us( 2 );
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delay_us( 2 );
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output_bit(ONE_WIRE_PIN, shift_right(&data,1,1));
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output_bit(ONE_WIRE_PIN, shift_right(&data,1,1));
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   delay_us( 60 );
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   delay_us( 40 );
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   output_float(ONE_WIRE_PIN);
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   output_float(ONE_WIRE_PIN);
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   delay_us( 2 );
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   delay_us( 2 );
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}
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}
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}
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}
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int onewire_read()
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int onewire_read()
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{
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{
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int count, data;
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int count, data;
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for (count=0; count<8; ++count)
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for (count=0; count<8; ++count)
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output_low(ONE_WIRE_PIN);
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output_low(ONE_WIRE_PIN);
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delay_us( 2 );
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delay_us( 2 );
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output_float(ONE_WIRE_PIN);
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output_float(ONE_WIRE_PIN);
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delay_us( 8 );
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delay_us( 8 );
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shift_right(&data,1,input(ONE_WIRE_PIN));
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shift_right(&data,1,input(ONE_WIRE_PIN));
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     delay_us( 120 );
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    delay_us(5);
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}
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}
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return( data );
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return( data );
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}
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}