最近在搞 websocket, 服务端是用 python 写的，所以，我需要用python 控制 can 去传输相关信息。
python-can 模块就是 python 控制 can 的模仿。
利用 buildroot 去生成 python-can 模块
cd $BUILDROOT_PATH make menuconfig Target packages ---> Interpreter languages and scripting ---> [*] python3 External python modules ---> [*] python-can make // 生成的文件在 output/target/usr/lib/python3.5/site-packages/ // 将这个文件 拷贝到自己的文件系统的 ust/lib/python3.5 里面
https://python-can.readthedocs.io/en/latest/index.html#
#!/usr/bin/python3 import os; ''' 这是加载 os 模块， 调用shell 命令 ''' import can; ''' 加载python-can 模块 ''' can.rc['interface'] = 'socketcan_native' ``` Linux 里面的 socketcan 在am335x 上面应该使用这个 ``` can.rc['channel'] = 'can1' ''' can 接口名字 ''' can.rc['bitrate'] = 1000000 ''' 波特率 1M ''' from can.interfaces.interface import Bus ''' 这个函数是can 的启动函数 ''' def can_setup(can_name): can_setup_command = "canconfig " + can_name + " bitrate 1000000 restart-ms 1000 ctrlmode triple-sampling on"; can_start_command = "canconfig " + can_name + " start"; pass; os.system(can_setup_command); os.system(can_start_command); ''' can 停止函数 ''' def can_stop(can_name): can_stop_command = "canconfig " + can_name + " stop"; os.system(can_stop_command); ''' 发送信息 ''' def send_one(): bus = can.interface.Bus(); msg = can.Message(arbitration_id=0x7f, data=[11, 25, 11, 1, 1, 2, 23, 18], extended_id=False); try: bus.send(msg); ''' 发送信息 ''' print("Message sent on {}".format(bus.channel_info)); except can.CanError: print("Message NOT sent"); def recv(): bus = can.interface.Bus(); msg = bus.recv(100); ''' 接收信息 ''' try: bus.send(msg); print(msg); print(msg.data[0]); # 接收回来的第一个字节的数据 print(msg.arbitration_id); # 接收回来的ID return msg; except can.CanError: print("Message NOT sent"); if __name__ == "__main__": ''' can_setup("can1"); ''' send_one(); recv(); ''' can_stop("can1"); '''