周立功USBCANFD |
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周立功USBCANFD
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参考前篇 周立功USBCAN-II的Python调用
当普通CAN用, 500K, 程序参考如下(未验证, 如需CANFD Fast传输, 把发送函数的BRS参数提出来, 采样点设置暂无) from zlgcan import * import time import platform zcanlib = ZCAN() def open_usbcan2(): device_handle = zcanlib.OpenDevice(ZCAN_USBCANFD_200U, 0,0) if device_handle == INVALID_DEVICE_HANDLE: print("Open Device failed!") exit(0) print("device handle:%d." %(device_handle)) # info = zcanlib.GetDeviceInf(device_handle) # print("Device Information:\n%s" %(info)) return device_handle def open_channel(device_handle, channel): chn_init_cfg = ZCAN_CHANNEL_INIT_CONFIG() chn_init_cfg.can_type = ZCAN_TYPE_CANFD chn_init_cfg.config.canfd.mode = 0 # From dev_info.json chn_init_cfg.config.canfd.abit_timing = 104286 # 500K chn_init_cfg.config.canfd.dbit_timing = 4260362 # 2M chn_handle = zcanlib.InitCAN(device_handle, channel, chn_init_cfg) if chn_handle is None: return None zcanlib.StartCAN(chn_handle) return chn_handle def transmit_can(chn_handle, stdorext, id, data, len): transmit_num = 1 msgs = (ZCAN_TransmitFD_Data * transmit_num)() for i in range(transmit_num): msgs[i].transmit_type = 0 #Send Self msgs[i].frame.eff = 0 if stdorext: msgs[i].frame.eff = 1 #extern frame msgs[i].frame.rtr = 0 #remote frame msgs[i].frame.can_id = id msgs[i].frame.brs = 0 # 1: fast, for examplt: 2M msgs[i].frame.len = len for j in range(len): msgs[i].frame.data[j] = data[j] ret = zcanlib.TransmitFD(chn_handle, msgs, transmit_num) def receive_can(chn_handle): rcv_num = zcanlib.GetReceiveNum(chn_handle, ZCAN_TYPE_CANFD) if rcv_num: print("Receive CAN message number:%d" % rcv_num) rcv_msg, rcv_num = zcanlib.ReceiveFD(chn_handle, rcv_num) for i in range(rcv_num): print("[%d]:ts:%d, id:0x%x, dlc:%d, eff:%d, rtr:%d, data:%s" %(i, rcv_msg[i].timestamp, rcv_msg[i].frame.can_id, rcv_msg[i].frame.can_dlc, rcv_msg[i].frame.eff, rcv_msg[i].frame.rtr, ''.join(hex(rcv_msg[i].frame.data[j])[2:] + ' ' for j in range(rcv_msg[i].frame.can_dlc)))) if __name__ == "__main__": # dll support if platform.python_version()>='3.8.0': import os os.add_dll_directory(os.getcwd()) # open device and channel 0 dev_handle = open_usbcan2() chn_handle = open_channel(dev_handle, 0) chn1_handle = open_channel(dev_handle, 1) print("channel 0 handle:%d." %(chn_handle)) print("channel 1 handle:%d." %(chn_handle)) # send can message data = [0,1,2,3,4,5,6,0xFF] for i in range(2): transmit_can(chn_handle, 0, 0x100, data, 6) transmit_can(chn1_handle, 0, 0x101, data, 7) transmit_can(chn_handle, 1, 0x12345678, data, 8) transmit_can(chn1_handle, 1, 0x12345679, data, 8) data[0] = data[0] + 1 time.sleep(0.1) # receive can message zcanlib.ClearBuffer(chn_handle) time.sleep(3) receive_can(chn_handle) receive_can(chn1_handle) #Close Channel zcanlib.ResetCAN(chn_handle) zcanlib.ResetCAN(chn1_handle) #Close Device zcanlib.CloseDevice(dev_handle) print("Finished")欢迎扫描二维码关注本人微信公众号, 及时获取最新文章: |
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