最近参与做了一个扫码设备的上位机软件。
扫码器扫码后读取到数据提交给服务器写入数据库。
那么HID上位机的服务软件该如何写呢？
这里使用Python实现。
相关的资料链接
https://pypi.org/project/hidapi
https://trezor.github.io/cython-hidapi/api.html#device-class
https://trezor.github.io/cython-hidapi/genindex.html
示例
功能：查找设备，列出所有设备的所有信息
import hid
for device_dict in hid.enumerate():
keys = list(device_dict.keys())
keys.sort()
for key in keys:
print("%s : %s" % (key, device_dict[key]))
print()
功能：链接设备、读写操作
try:
print("Opening the device")
h = hid.device()
h.open(0x534C, 0x0001) # TREZOR VendorID/ProductID
print("Manufacturer: %s" % h.get_manufacturer_string())
print("Product: %s" % h.get_product_string())
print("Serial No: %s" % h.get_serial_number_string())
# enable non-blocking mode
h.set_nonblocking(1)
# write some data to the device
print("Write the data")
h.write([0, 63, 35, 35] + [0] * 61)
# wait
time.sleep(0.05)
# read back the answer
print("Read the data")
while True:
d = h.read(64)
if d:
print(d)
else:
break
print("Closing the device")
h.close()
except IOError as ex:
print(ex)
print("You probably don't have the hard-coded device.")
print("Update the h.open() line in this script with the one")
print("from the enumeration list output above and try again.")
print("Done")
| 
楼主
标题置顶
标题高亮
