目录
- 关键词
- 平台说明
- 背景
- 所需库
- 实现过程
- 方法1.
- 1.安装相关库
- 2.代码实现
- 总结
关键词
==python、excel、DBC、openpyxl ==
平台说明
| 项目 | Value |
|---|---|
| python版本 | 3.6 |
背景
在搭建自动化测试平台的时候经常会提取DBC文件中的信息并保存为excel或者其他文件格式，用于自动化测试。本文介绍了如何用python3.6实现获取EXCEL文件内容并保存到DBC。
所需库
1.canmatrix：需要它库来解析 DBC 文件，它提供了对 Controller Area Network (CAN) 数据的解析功能，包括 DBC 文件的支持。
2.openpyxl ：是一个用于读写 Excel 文件的 Python 库。
实现过程
方法1.
1.安装相关库
pip install openpyxl canmatrix
2.代码实现
from openpyxl import load_workbook
import canmatrix
class MyDBC_Obj:
def __init__ (self,dbc_path,excel_path):
self.name = "self"
self.sheet = ""
self.dbc = ""
self.dbc_path = dbc_path
self.excel_path = excel_path
def read_excel(self):
workbook = load_workbook(filename = self.excel_path)
self.sheet = workbook.active
def generate_dbc(self):
self.dbc = canmatrix.CanMatrix()
self.dbc.add_global_defines("BusType","STRING")
self.dbc.add_define_default("BusType","CAN")
# 报文发送类型属性以及默认值
self.dbc.add_frame_defines("GenMsgSendType", 'ENUM "Cyclic", "Event"' )
self.dbc.add_define_default("GenMsgSendType", "Cyclic")
self.dbc.add_frame_defines("GenMsgCycleTime", 'INT 0 65535')
self.dbc.add_define_default("GenMsgCycleTime", "0")
def write_dbc(self):
self.read_excel()
self.generate_dbc()
ecu_obj = canmatrix.Ecu(self.sheet.cell(1,29).value)
ecu_obj.name = self.sheet.cell(1,29).value
self.dbc.add_ecu(ecu_obj)
for i in range(2,self.sheet.max_row+1):
if self.sheet.cell(row=i,column=1).value == None:
self.sheet.cell(row=i,column=1).value = self.sheet.cell(row=i-1,column=1).value
self.sheet.cell(row=i,column=2).value = self.sheet.cell(row=i-1,column=2).value
self.sheet.cell(row=i,column=3).value = self.sheet.cell(row=i-1,column=3).value
self.sheet.cell(row=i,column=4).value = self.sheet.cell(row=i-1,column=4).value
self.sheet.cell(row=i,column=5).value = self.sheet.cell(row=i-1,column=5).value
self.sheet.cell(row=i,column=6).value = self.sheet.cell(row=i-1,column=6).value
message_name = ""
message_id = 0
message_length = 0
message_type_is_fd = False
message_type_is_extended = False
message_cycle = 0
message_recive = ""
frame_obj = canmatrix.Frame()
signal_obj=canmatrix.Signal()
for row in self.sheet.iter_rows(min_row=3,values_only=True):
signal_name = row[6]
if signal_name != None:
signal_obj.name = row[6]
message_name = row[0]
编程 message_id = int(row[2],16)
if row[11] != None:
signal_obj.start_bit = int(row[11])
else:
signal_obj.start_bit = 0
signal_obj.size = int(row[13])
if row[9] == "Motorola":
signal_obj.is_little_endian = False
else:
signal_obj.is_little_endian = True
signal_obj.initial_value = int(row[21])
signal_obj.add_attribute("GenSigStartValue",signal_obj.initial_value)
signale_sendtype = 0
if row[12] == "Cycle":
signale_sendtype = 0
else:
signale_sendtype = 2
signal_obj.add_attribute("GenSigSendType",signale_sendtype)
if row[14] == "unsigned":
signal_obj.is_float = False
signal_obj.is_signed = False
elif row[14] == "signed":
signal_obj.is_float = False
signal_obj.is_signed = True
else:
signal_obj.is_float = True
signal_obj.is_signed = False
signal_obj.min = float(row[17])
signal_obj.max = float(row[18])
signal_obj.factor = float(row[15])
signal_obj.offset = float(row[16])
if row[23] != None:
signal_obj.unit = row[23]
if row[28] == "RX":
signal_obj.add_receiver(ecu_obj.name)
elif row[28] == "TX":
message_recive = ecu_obj.name
message_sig_group_name = row[8]
if message_sig_group_name != None:
signalGroups = frame_obj.signal_group_by_name(message_sig_group_name)
if signalGroups == None:
frame_obj.add_signal_group(message_sig_group_name,1,signal_obj.name)
else:
signalGroups.add_signal(signal_obj)
if row[24] != None:
sigvalue = row[24]
st=sigvalue.split("\n")
for i in st:
if i == "":
st.remove(i)
d = dict(x.split(":") for x in st)
for k, v in d.items():
signal_obj.add_values(k,v)
frame_obj.add_signal(signal_obj)
#*********** frame type set ***************
signal_obj=canmatrix.Signal()
if row[5] != None:
message_length = int(row[5])
else:
message_length = 0
if row[4] != None:
message_cycle = int(row[4])
if row[1] == "CAN standard":
message_type_is_fd = False
mewww.devze.comssage_type_is_extended = False
elif row[1] == "CANFD standard"www.devze.com:
message_type_is_fd = True
message_type_is_extended = False
elif row[1] == "CAN extended":
message_type_is_extended = True
message_type_is_fd = False
elif row[1] == "CANFD extended":
message_twww.devze.comype_is_extended = True
message_type_is_fd = True
else:
frame_obj.name = message_name
frame_obj.size = message_length
frame_obj.arbitration_id.id = message_id
frame_obj.cycle_time = message_cycle
frame_obj.is_fd = message_type_is_fd
frame_obj.is_j1939 = message_type_is_extended
if message_recive!= "":
frame_obj.add_transmitter(ecu_obj.name)
self.dbc.add_frame(frame_obj)
message_name = ""
message_id = 0
message_length = 0
message_type = False
message_recive = ""
signalGroups = []
frame_obj = canmatrix.Frame()
# 导出到DBC文件
file_out = open(self.dbc_path, "wb")
canmatrix.formats.dbc.dump(self.dbc,file_out,dbcExportEncoding='utf-8')
file_out.close()
if __name__ == "__main__":
dbc_file_path = "excel.dbc"编程客栈 # Replace with the actual DBC file path
excel_file_path = "dbc.xlsx" # Replace with the desired Excel output path
MyDbc = MyDBC_Obj(dbc_file_path,excel_file_path)
MyDbc.write_dbc()
总结
到此这篇关于如何用python获取EXCEL文件内容并保存到DBC的文章就介绍到这了,更多相关python获取EXCEL内容保存DBC内容请搜索编程客栈(www.devze.com)以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程客栈(www.devze.com)！
加载中,请稍侯......
精彩评论