Python周立功CAN接口卡接口库函数
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2022-04-01 18:43:34
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周立功CAN相关资源下载
首先,把下载的库函数文件(由上面链接下载)都放在工作目录下。库函数文件总共有三个文件:ControlCAN.h、
ControlCAN.lib、ControlCAN.dll 和一个文件夹 kerneldlls。
from ctypes import *
class _VCI_INIT_CONFIG(Structure):
_fields_ = [('AccCode', c_ulong),
('AccMask', c_ulong),
('Reserved', c_ulong),
('Filter', c_ubyte),
('Timing0', c_ubyte),
('Timing1', c_ubyte),
('Mode', c_ubyte)]
class _VCI_CAN_OBJ(Structure):
_fields_ = [('ID', c_uint),
('TimeStamp', c_uint),
('TimeFlag', c_byte),
('SendType', c_byte),
('RemoteFlag', c_byte),
('ExternFlag', c_byte),
('DataLen', c_byte),
('Data', c_byte*8),
('Reserved', c_byte*3)]
class _RX_CAN_OBJ(Structure):
_fields_ = [('ID', c_uint),
('TimeStamp', c_uint),
('TimeFlag', c_byte),
('SendType', c_byte),
('RemoteFlag', c_byte),
('ExternFlag', c_byte),
('DataLen', c_byte),
('Data', c_byte*8),
('Reserved', c_byte*3)]
vic = _VCI_INIT_CONFIG()
vic.AccCode = 0x00000000
vic.AccMask = 0xffffffff
vic.Filter =1
vic.Timing0 = 0x01
vic.Timing1 = 0x1c
vic.Mode = 0
vco = _VCI_CAN_OBJ()
vco.ID = 0x18ff3010
vco.SendType = 0
vco.RemoteFlag = 0
vco.ExternFlag = 1
vco.DataLen = 8
vco.Data = (5, 2, 3, 4, 5, 6, 7, 8)
rxdata=_RX_CAN_OBJ()
canLib = windll.LoadLibrary('./ControlCAN.dll')
print("下面执行操作返回“1”表示操作成功!")
print('打开设备: %d' % (canLib.VCI_OpenDevice(3, 0, 0)))
print('设置波特率: %d' % (canLib.VCI_SetReference(3, 0, 0, 0, pointer(c_int(0x1C0008)))))
print('初始化: %d' % (canLib.VCI_InitCAN(3, 0, 0, pointer(vic))))
print('启动: %d' % (canLib.VCI_StartCAN(3, 0, 0)))
print('清空缓冲区: %d' % (canLib.VCI_ClearBuffer(3, 0, 0)))
print('发送: %d' % (canLib.VCI_Transmit(3, 0, 0, pointer(vco), 1)))
# print('接收: %d' % (canLib.VCI_Receive(3, 0, 0, pointer(rxdata),100,400)))
while canLib.VCI_GetReceiveNum(3,0,0)==0 :
continue
print("接收缓存数量:",canLib.VCI_GetReceiveNum(3,0,0))
if(canLib.VCI_Receive(3, 0, 0, pointer(rxdata),100,400)):
print('从缓存读取一帧数据:', bytearray(rxdata.Data).hex())
else:
print("接收缓存区为空")
print("接收缓存数量:",canLib.VCI_GetReceiveNum(3,0,0))
运行结果如下:
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