带有struct并通过串行通信发送的Python字节数组
带有struct并通过串行通信发送的Python字节数组
提问于 2022-07-02 14:37:49
我为字节接收程序编写了代码，并在Python float and integer values to bytearray上寻求帮助。
而且起作用了。
我的问题是，每次运行程序时，我都可以发送数据。但是当我试图用with循环自动化这个数据传输时，我得到了校验和错误
我的代码：
import serial
import struct
import time
ser = serial.Serial('COM16', 19200, serial.EIGHTBITS, serial.PARITY_NONE, serial.STOPBITS_ONE)
size = 78
array1 = bytearray(size)
check_sum = 0
array1[0] = 0xFF
array1[1] = 0xFF
array1[2] = 0x54
array1[3] = 0x52
array1[5] = 0
array1[76] = 0x0D
array1[77] = 0x0A
counter = 0
altitude = input("altitude: ")
altitude_gps = input("gps altitude: ")
locationx = input("location x: ")
locationy = input("location y : ")
payload_altitude = input("payload altitude: ")
locationx_payload = input("location x payload: ")
locationy_paylaod = input("location y payload: ")
altitude_array = struct.pack('<f', float(altitude))
altitude_gps_array = struct.pack('<f', float(altitude_gps))
locationx_array = struct.pack('<f', float(locationx))
locationy_array = struct.pack('<f', float(locationy))
payload_altitude_array = struct.pack('<f', float(payload_altitude))
locationx_payload_array = struct.pack('<f', float(locationx_payload))
locationy_paylaod_array = struct.pack('<f', float(locationy_paylaod))
array1[6] = altitude_array[0]
array1[7] = altitude_array[1]
array1[8] = altitude_array[2]
array1[9] = altitude_array[3]
array1[10] = altitude_gps_array[0]
array1[11] = altitude_gps_array[1]
array1[12] = altitude_gps_array[2]
array1[13] = altitude_gps_array[3]
array1[14] = locationx_array[0]
array1[15] = locationx_array[1]
array1[16] = locationx_array[2]
array1[17] = locationx_array[3]
array1[18] = locationy_array[0]
array1[19] = locationy_array[1]
array1[20] = locationy_array[2]
array1[21] = locationy_array[3]
array1[22] = payload_altitude_array[0]
array1[23] = payload_altitude_array[1]
array1[24] = payload_altitude_array[2]
array1[25] = payload_altitude_array[3]
array1[26] = locationx_payload_array[0]
array1[27] = locationx_payload_array[1]
array1[28] = locationx_payload_array[2]
array1[29] = locationx_payload_array[3]
array1[30] = locationy_paylaod_array[0]
array1[31] = locationy_paylaod_array[1]
array1[32] = locationy_paylaod_array[2]
array1[33] = locationy_paylaod_array[3]
for x in range(4, 75):
check_sum += array1[x]
check_sum = check_sum % 256
array1[75] = check_sum
ser.write(array1)
time.sleep(3)
while True:
counter = counter + 1
array1[5] = counter
for y in range(4, 75):
check_sum += array1[x]
check_sum = check_sum % 256
array1[75] = check_sum
ser.write(array1)
time.sleep(3)如何才能使这一转移过程持续下去。或者如何在while循环中修复这个校验和错误。(没有while循环，我对校验和没有问题，每次运行程序我都可以发送数据)
回答 1
Stack Overflow用户
回答已采纳
发布于 2022-07-29 03:16:39
在中帮助命名为"rndpkt“的代码和问题得到了解决
import struct
import time
import serial
array1 = bytearray(78)
array1[0:4] = bytes.fromhex('FFFF5452')
array1[76:78] = bytes.fromhex('0d0a')
altitude = float(input("altitude: "))
gps_altitude = float(input("gps altitude: "))
latitude = float(input("latitude: "))
longitude = float(input("longitude: "))
payload_altitude = float(input("payload altitude: "))
payload_latitude = float(input("payload latitude: "))
payload_longitude = float(input("payload longitude: "))
array1[6:34] = struct.pack('<7f', altitude, gps_altitude, latitude, longitude, payload_altitude, payload_latitude, payload_longitude)
with serial.Serial('COM16', 19200, serial.EIGHTBITS, serial.PARITY_NONE, serial.STOPBITS_ONE) as ser:
while True:
array[75] = sum(array[4:75]) % 256
ser.write(array1)
array1[5] += 1
time.sleep(3)页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/72842853
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