梁生
f41cb5636f
修复hc32f460的can总线在bus off状态时死机问题，修复can滤波器设置失效问题 (#6083)
* [bsp][hc32]fix can bus driver bug.
1. 更改硬件滤波器数量为8，和手册描述一致。
2. 修复_can_control()函数，RT_CAN_CMD_SET_FILTER指令，当应用层ID超出29bit时导致滤波器失效的问题。
3. 修改_can_control()函数，RT_CAN_CMD_SET_FILTER指令，
可同时支持标准帧和扩展帧。
4. 修复can总线故障关闭时，程序一直卡在中断中无法退出的问题。
5. 针对can收发器硬件STB引脚，增加宏定义CAN1_STB_FUNC_ENABLE，适配没有STB引脚的收发器。
This reverts commit 7fcd8e9afc68eecf5fecc4cb6f9acc4fe76c2796.
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