【飞凌RK3568开发板试用体验】CAN电压检测系统

在前面CAN简易分析仪的基础上，与我在试用的瑞萨RA4M2单片机组成了一套电压检测系统。

【 硬件平台 】

1、飞凌OK3568开发板一块。

2、瑞萨RA4M2开发板一块。

3、跳线器一个。

4、CAN分析仪一个。

5、数据电源一台。

【 联网方式 】CAN

【通讯协议】

can波特率为500K

ID：001为电压值

data[0]为电压值高8位，data[1]为电压值低8位。转换公式为(data[0]<<8 + data[1]) /4096 *3.3

【具体代码】

ok3568的py文件内存为：

#!/usr/bin/python3
# -*- coding: UTF-8 -*-

import tkinter
import time
import can
import threading
import os
from can.interface import Bus

try:
   os.system("sudo ip link set can0 type can bitrate 500000")
   os.system('sudo ifconfig can0 up')
except:
   print("err")
can.rc['bitrate'] = '500000'
can.rc['interface']='socketcan'

can.rc['channel'] = 'can0'


bus = Bus()

top=tkinter.Tk(className='电压检测系统')
top.geometry("800x600") 
#加上标签
label = tkinter.Label(top,font=('黑体',40))
label['text'] = 'OK3568 CAN 电压检测系统'
label_v= tkinter.Label(top,font=('宋体',20))
label_v['text'] = '0.00V'
def print_data(msg):
    try:
        str_data = ""
        str_disp = ""
        dlc = msg.dlc
        id = msg.arbitration_id
        rcv_data = msg.data
        if id == 0x001:
            get_v = int(msg.data[0]) * 256 + int(msg.data[1])
            get_v =(float(get_v)/4096)*3.3
            tr_disp_v = '%.3f' % get_v
            #print(tr_disp_v)
            label_v["text"] = "电压值：" + tr_disp_v + 'V'
        for i in range(0, dlc):
            str_data =str_data + "0x" + str(int(msg.data[i])) + " "
        str_disp = "ID: " + str(id) + "  DLC： " + str(dlc) + "  DATA: " + str_data + "\r\n"
    except Exception as e:
        text.insert("end","print data err!\r\n")
    text.insert("end",str_disp)
def rcv_can():
    while True:
        try:
            msg = bus.recv(1.0)
            if msg:
                print(msg)
                print_data(msg)
        except Exception as e:
            print("recv err: " + str(e))
def send_one():
    msg = can.Message(arbitration_id=0xC0FFEE, data=[0, 25, 0, 1, 3, 1, 4, 1], is_extended_id=True)
    try:
        bus.send(msg)
        print(f"Message sent on {bus.channel_info}")
    except Exception as e:
        print("Message NOT sent: " + str(e))

#加上按钮
button = tkinter.Button(top, text="发送CAN数据",command=send_one)
text = tkinter.Text(top,width=100,height=20)
label.pack(pady=50)
button.pack(padx=50)
label_v.pack(pady=50)
text.pack(padx=50)

thread = threading.Thread(target=rcv_can)
thread.start()



#进入消息循环体
top.mainloop()

实现在界面如下：