Details | Last modification | View Log | SVN | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 51 | johboh | 1 | /********************************************************************* |
| 2 | * |
||
| 3 | * CAN specification |
||
| 4 | * |
||
| 5 | ********************************************************************* |
||
| 97 | johboh | 6 | * FileName: $HeadURL: https://svn.auml.se/svn/HomeAutomation/trunk/EmbeddedSoftware/PIC/canToSerial/Include/CANdefs.h $ |
| 7 | * Last changed: $LastChangedDate: 2006-11-14 21:22:17 +0100 (Tue, 14 Nov 2006) $ |
||
| 8 | * By: $LastChangedBy: johboh $ |
||
| 9 | * Revision: $Revision: 97 $ |
||
| 51 | johboh | 10 | ********************************************************************/ |
| 11 | |||
| 12 | #ifndef CANDEFS_H |
||
| 13 | #define CANDEFS_H |
||
| 14 | |||
| 53 | johboh | 15 | #include <compiler.h> |
| 51 | johboh | 16 | |
| 64 | johboh | 17 | #define CAN_BAUD 0.500000 //in Mbits/s |
| 51 | johboh | 18 | //#define CAN_LOOPBACK_MODE |
| 19 | |||
| 20 | |||
| 21 | // TQ(us) = (2 * (BRP + 1))/FOSC(MHz) |
||
| 22 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / (TQ(us) * 8) |
||
| 23 | // Where 8 is nominal bit time. |
||
| 24 | // From this, BRP can be calculated. |
||
| 25 | // |
||
| 26 | // Nominal Bit Rate(kbit/s) = 1 / TBIT = 1 / ((2 * (BRP + 1))/FOSC(MHz) * 8) |
||
| 27 | |||
| 28 | #define CAN_BRP (int)(CLOCK_FOSC/(CAN_BAUD * 16) - 1) |
||
| 29 | |||
| 30 | |||
| 31 | #endif //CANdefs.h |