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51 johboh 1
/*********************************************************************
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 *
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 *                  CAN specification
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 *
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 *********************************************************************
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 * FileName:        CANdefs.h
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 *
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 * Author               Date    Comment
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 *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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 * Johan Böhlin     21-10-06    Original        (Rev 1.0)
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 ********************************************************************/
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#ifndef CANDEFS_H
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#define CANDEFS_H
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#include <compiler.h>
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#define CAN_BAUD 0.500000 //in Mbits/s
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//#define CAN_LOOPBACK_MODE
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// TQ(us) = (2 * (BRP + 1))/FOSC(MHz)
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// Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / (TQ(us) * 8)
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// Where 8 is nominal bit time.
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// From this, BRP can be calculated.
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//
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// Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / ((2 * (BRP + 1))/FOSC(MHz) * 8)
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#define CAN_BRP (int)(CLOCK_FOSC/(CAN_BAUD * 16) - 1)
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#endif //CANdefs.h