使⽤python测试stm32串⼝
本⽂⾸发于在下的个⼈博客
前段时间有个项⽬，要⽤stm32跟⼀个⽐较⼤,⽐较重的设备进⾏频繁的串⼝通信，因为设备移动起来不⽅便，遂想写个脚本，代替设备，对stm32的通信逻辑进⾏测试.
于是有了以下代码:
# coding=utf-8
import serial
import threading
import csvpython怎么读取串口数据
import random
identitys_csv = ader(open('./identitys.csv','r'))
# identitys_csv = ader(open('./identitys_less.csv','r'))
identitys =list()
ser = serial.Serial("COM13",9600)
askData =bytes([0xA0,0x0D,0x01,0x8A,0x00,0x01,0x01,0x01,0x02,0x01,0x03,0x01,0x00,0x0A,0xB4])
def receiveFunc():
print("---------------测试开始--------------")
serData =bytes()
while len(identitys)!=0:
if ser.inWaiting()>0:
out = ad(1)
serData += out
if len(serData)==15:
if serData == askData:
print("-------------设备请求数据------------")
num = random.randint(5,15)
if num >len(identitys):
num =len(identitys)
print("--------------发送"+str(num)+"个数据------------")
for identity in identitys[0:num]:
print(identity)
identityFormatData = transToFormat(identity)
ser.write(identityFormatData)
for i in identityFormatData:
print('0x%02x'%i,end=' ')
print("")
del identitys[0:num]
else:
print("------------不知是啥的数据-----------")
for i in out:
print('0x%02x'%i,end=' ')
print("")
serData =bytes()
print("---------------测试结束--------------")
def transToFormat(identity):
if identity[-1]=="X":
identity = place("X",":")
formatData =bytes([0xA0,0x13,0x01,0x8A,0x00,0x00,0x00])
for i in range(len(identity)//2):
temp =((identity[2*i].encode('utf-8')[0]-0x30)<<4)+(identity[2*i+1].encode('utf-8')[0]-0x30)
formatData +=bytes([temp])
formatData +=bytes([0x00,0x00,0x00,0x00])
checkSum =0
checkSum =0
for i in formatData:
checkSum += i
checkSum = checkSum &0x00FF
checkSum =0x100- checkSum
if checkSum ==256:
checkSum =0
formatData +=bytes([checkSum])
return formatData
if __name__=='__main__':
print("---------正在读取测试数据列表--------")
for i in identitys_csv:
identitys.append(i[0])
print("---------共"+str(len(identitys))+"条测试数据--------")
receiveThread = threading.Thread(target=receiveFunc,name="receive")
receiveThread.start()
主要作⽤是将存在csv⽂件中的很多⾝份证信息取出来，然后等stm32那边通过串⼝发来请求信息(ackData)的时候，就随机取5到15个⾝份证信息，按照⼀定数据格式发送给stm32.

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