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280049c 例程can通信问题?

Other Parts Discussed in Thread: C2000WARE

最近使用280049Claunchxl调试CAN通信,发现C2000ware 最新版本例程中波特率设置函数  CAN_setBitRate(CANA_BASE, DEVICE_SYSCLK_FREQ, 500000, 20);

而就版本中波特率设置函数为 CAN_setBitRate(CANA_BASE, DEVICE_SYSCLK_FREQ, 500000, 16);后者例程写进程序后CAN无法正常通信,请问是为什么?

2:这个函数最后一个参数bittime在实际工程中怎么计算?