?? doreadme.txt
字號(hào):
/* University Board Uses PH1 to enable CAN Transceiver U13 */
/* U13 is the transceiver for Port 0 */
/* CON3 Pinout:
CAN1L -> Pin1
CAN1H -> Pin2
CAN0L -> Pin3
CAN0H -> Pin4 */
/* University Board has 8MHz clock source */
/* Jumper J8 (BDM +5V) should be connected */
/* CAN Clock Source (External oscillator) = 8Mhz
* Target BitRate = 125Khz
* Total Time Quanta = 16
* Sincronization Jump Width = 4 Time Quanta
* 1 sample
* Sample point at 75% of Bit Timing
*
* CAN_BRP = ((CAN Clock Source)/fTq) - 1
* fTq = (Bit Rate) * (Total Time Quanta)
* Total Time Quanta = (SYNCH_SEG+(TSEG1+1)+(TSEG2+1))
* Total Time Quanta = 1 + 11 + 4 = 16 Time Quanta
* fTq = 125Khz * 16 Time Quanta = 2Mhz
* CAN_BRP = (16Mhz/2Mhz) - 1 = 8 - 1 = 7
* TSEG1 = 10
* TSEG2 = 3
* SJW = (Synchronization Jump Width-1) = 3
*/
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