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import serial
import time
try:
from serial.tools.list_ports import comports
except ImportError:
raise serial.serialutil.SerialException
test_comx = 'COM66'
test_baudrate = 2000000
test_maxsize = 10*1024*1024
test_data = '0xAA' * 4096
test_serial = serial.Serial(test_comx, test_baudrate, timeout = 1)
def test_cdc_out():
send_count = 0
begin = time.time()
while True:
if send_count < test_maxsize:
txdatalen = test_serial.write(test_data.encode("utf-8"))
send_count += txdatalen
else:
print("cdc out speed %f MB/s" %(send_count//1024//1024/(time.time() - begin)))
break
def test_cdc_in():
read_count = 0
begin = time.time()
while True:
if read_count < test_maxsize:
data = test_serial.read(test_maxsize).decode(encoding='utf-8',errors='ignore')
read_count += len(data)
else:
print("cdc in speed %f MB/s" %(read_count//1024//1024/(time.time() - begin)))
break
if __name__ == '__main__':
print('test cdc out speed')
test_serial.setDTR(0)
test_cdc_out()
print('test cdc in speed')
test_serial.setDTR(1)
test_cdc_in()
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