Rev 73 | Only display areas with differences | Regard whitespace | Details | Blame | Last modification | View Log | SVN | RSS feed
| Rev 73 | Rev 79 | ||
|---|---|---|---|
| 1 | /********************************************************************* |
1 | /********************************************************************* |
| 2 | * |
2 | * |
| 3 | * CAN specification |
3 | * CAN specification |
| 4 | * |
4 | * |
| 5 | ********************************************************************* |
5 | ********************************************************************* |
| 6 | * FileName: CANdefs.h |
6 | * FileName: CANdefs.h |
| 7 | * |
7 | * |
| 8 | * Author Date Comment |
8 | * Author Date Comment |
| 9 | *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
9 | *~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 10 | * Johan Böhlin 21-10-06 Original (Rev 1.0) |
10 | * Johan Böhlin 21-10-06 Original (Rev 1.0) |
| 11 | ********************************************************************/ |
11 | ********************************************************************/ |
| - | 12 | // $IDI$ |
|
| 12 | 13 | ||
| 13 | #ifndef CANDEFS_H |
14 | #ifndef CANDEFS_H |
| 14 | #define CANDEFS_H |
15 | #define CANDEFS_H |
| 15 | 16 | ||
| 16 | #include <compiler.h> |
17 | #include <compiler.h> |
| 17 | 18 | ||
| 18 | #define CAN_BAUD 0.500000 //in Mbits/s |
19 | #define CAN_BAUD 0.500000 //in Mbits/s |
| 19 | //#define CAN_LOOPBACK_MODE |
20 | //#define CAN_LOOPBACK_MODE |
| 20 | 21 | ||
| 21 | 22 | ||
| 22 | // TQ(us) = (2 * (BRP + 1))/FOSC(MHz) |
23 | // TQ(us) = (2 * (BRP + 1))/FOSC(MHz) |
| 23 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / (TQ(us) * 8) |
24 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / (TQ(us) * 8) |
| 24 | // Where 8 is nominal bit time. |
25 | // Where 8 is nominal bit time. |
| 25 | // From this, BRP can be calculated. |
26 | // From this, BRP can be calculated. |
| 26 | // |
27 | // |
| 27 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / ((2 * (BRP + 1))/FOSC(MHz) * 8) |
28 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / ((2 * (BRP + 1))/FOSC(MHz) * 8) |
| 28 | 29 | ||
| 29 | #define CAN_BRP (int)(CLOCK_FOSC/(CAN_BAUD * 16) - 1) |
30 | #define CAN_BRP (int)(CLOCK_FOSC/(CAN_BAUD * 16) - 1) |
| 30 | 31 | ||
| 31 | 32 | ||
| 32 | #endif //CANdefs.h |
33 | #endif //CANdefs.h |
| 33 | 34 | ||