Python周立功CAN接口卡接口库函数

男娘i 2021-07-26 21:38 987阅读 0赞

[周立功CAN相关资源下载][CAN]  
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：**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI1Nzc0NzQ_size_16_color_FFFFFF_t_70]

[CAN]: https://www.zlg.cn/can/down/down/id/22.html
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3UwMTI1Nzc0NzQ_size_16_color_FFFFFF_t_70]: /images/20210726/16896c6663ff49248cf4d7cda47f5a49.png