Details | Last modification | View Log | SVN | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 51 | johboh | 1 | /********************************************************************* |
| 2 | * |
||
| 3 | * CAN specification |
||
| 4 | * |
||
| 5 | ********************************************************************* |
||
| 6 | * FileName: CANdefs.h |
||
| 7 | * |
||
| 8 | * Author Date Comment |
||
| 9 | *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
||
| 10 | * Johan Böhlin 21-10-06 Original (Rev 1.0) |
||
| 11 | ********************************************************************/ |
||
| 12 | |||
| 13 | #ifndef CANDEFS_H |
||
| 14 | #define CANDEFS_H |
||
| 15 | |||
| 53 | johboh | 16 | #include <compiler.h> |
| 51 | johboh | 17 | |
| 64 | johboh | 18 | #define CAN_BAUD 0.500000 //in Mbits/s |
| 51 | johboh | 19 | //#define CAN_LOOPBACK_MODE |
| 20 | |||
| 21 | |||
| 22 | // TQ(us) = (2 * (BRP + 1))/FOSC(MHz) |
||
| 23 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / (TQ(us) * 8) |
||
| 24 | // Where 8 is nominal bit time. |
||
| 25 | // From this, BRP can be calculated. |
||
| 26 | // |
||
| 27 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / ((2 * (BRP + 1))/FOSC(MHz) * 8) |
||
| 28 | |||
| 29 | #define CAN_BRP (int)(CLOCK_FOSC/(CAN_BAUD * 16) - 1) |
||
| 30 | |||
| 31 | |||
| 32 | #endif //CANdefs.h |