通过bash发送命令到pic18f2550继电器电路

我有一个usb继电器电路，使用pic18f2550，这是供应商id：0461和产品id：0020我试图通过python通过python通信此设备，我可以连接设备，但不能发送任何命令，总是出现错误。通过bash发送命令到pic18f2550继电器电路

如何通过bash或pyusb发送命令到这个电路在Ubuntu？

我的Python代码

import usb.core 
import usb.util 
import struct 
dev = usb.core.find(idVendor=0x0461, idProduct=0x0020) 
if dev is None: 
    raise ValueError('Device not found') 
cfg = dev[0] 
intf = cfg[(0,0)] 

ep = usb.util.find_descriptor(
    intf, 
    custom_match = \ 
    lambda e: \ 
     usb.util.endpoint_direction(e.bEndpointAddress) == \ 
     usb.util.ENDPOINT_OUT 
) 
assert ep is not None 

buff = [0x80] 
ep.write(buff)

我-v的lsusb细节;

Bus 003 Device 002: ID 0461:0020 Primax Electronics, Ltd 
Device Descriptor: 
    bLength    18 
    bDescriptorType   1 
    bcdUSB    1.10 
    bDeviceClass   0 (Defined at Interface level) 
    bDeviceSubClass   0 
    bDeviceProtocol   0 
    bMaxPacketSize0  64 
    idVendor   0x0461 Primax Electronics, Ltd 
    idProduct   0x0020 
    bcdDevice   1.00 
    iManufacturer   1 SAC 
    iProduct    2 ----arena---- 
    iSerial     0 
    bNumConfigurations  1 
    Configuration Descriptor: 
    bLength     9 
    bDescriptorType   2 
    wTotalLength   41 
    bNumInterfaces   1 
    bConfigurationValue  1 
    iConfiguration   0 
    bmAttributes   0xc0 
     Self Powered 
    MaxPower    100mA 
    Interface Descriptor: 
     bLength     9 
     bDescriptorType   4 
     bInterfaceNumber  0 
     bAlternateSetting  0 
     bNumEndpoints   2 
     bInterfaceClass   3 Human Interface Device 
     bInterfaceSubClass  0 No Subclass 
     bInterfaceProtocol  0 None 
     iInterface    0 
     HID Device Descriptor: 
      bLength     9 
      bDescriptorType  33 
      bcdHID    1.00 
      bCountryCode   0 Not supported 
      bNumDescriptors   1 
      bDescriptorType  34 Report 
      wDescriptorLength  32 
     Report Descriptors: 
      ** UNAVAILABLE ** 
     Endpoint Descriptor: 
     bLength     7 
     bDescriptorType   5 
     bEndpointAddress  0x81 EP 1 IN 
     bmAttributes   3 
      Transfer Type   Interrupt 
      Synch Type    None 
      Usage Type    Data 
     wMaxPacketSize  0x0040 1x 64 bytes 
     bInterval    1 
     Endpoint Descriptor: 
     bLength     7 
     bDescriptorType   5 
     bEndpointAddress  0x01 EP 1 OUT 
     bmAttributes   3 
      Transfer Type   Interrupt 
      Synch Type    None 
      Usage Type    Data 
     wMaxPacketSize  0x0040 1x 64 bytes 
     bInterval    1 
Device Status:  0x0001 
    Self Powered

来源

2012-12-14 Mae Ares

您是否尝试过使用Sudo运行，如果是这样的话，那么它可能是您在/etc/udev/rules.d中的UDEV规则 – ServerMonkey

尝试在你的/etc/udev/rules.d中的文件设置类似下面：

子系统= “USB_DEVICE”，ACTION = “添加”，GOTO = “device_rules_end” SYSFS！ {idVendor} == “1532”，SYSFS {idProduct} == “0017”，SYMLINK + = “mydevice在” MODE = “0666”，OWNER = “”，GROUP = “根” LABEL = “device_rules_end”

来源

2012-12-14 19:24:39 ServerMonkey

我试过了，但仍然没有运气。 –

您是否检查过日志以确认系统是否具有预期的设备详细信息？ – ServerMonkey

lsusb -v出口; https://docs.google.com/document/d/1Vv64TrDVdGdXhpxmbv2wMi8fwPia1wep5cDUr0krdwA/edit –

通过bash发送命令到pic18f2550继电器电路

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