为配置添加脚本和触发点

2.1 为现有配置准备一个 t 程序

// 这个脚本是用来检测一套如下配置:
//
// [ ] 记录所有事件
// [ ] FIFO 模式
// 电源设置:在 CAN 电源断开后延续5次, 以秒计
//
// CAN 1 应被连接到 CAN 2
//
// 触发点:
// CAN1 触发点1 定时 [4s] : 开始记录, 后触发=0
// CAN1 触发点2 定时 [7s] : 停止记录, 后触发=3000
//
// 脚本发送报文id:
// Id 1 在 0.5s
// Id 2在1.5s
// Id 3在2.5s
// Id 4在3.5s
// Id 5在4.5s
// ... 如此类推，直到 
// Id 11 在 10.5s

variables {
  // 基本通道。 CAN 报文将被发送到通道channel ch 上和在下面通道上接收
  // channel ch + 1
  const int ch = 0;

  // 这个一次单击定时器是用来在第一个CAN报文发送前有一个延迟。 
  Timer singleshot;

  // 这个周期定时器用来在CAN 报文之间定时
  Timer periodic;

  // 这个已发送CAN报文的 id, 将被依次递增
  int msgId = 1;

  // 将被发送的CAN 报文
  CanMessage msg;
}

on Timer singleshot {
  // 开始周期定时器，发送 10 个或更多 CAN 报文
  timerStart(periodic, 10);

  // 在使用当前 CAN 报文 id后, 在下一次使用前依次递增
  msg.id = msgId++;
  msg.flags = 0;
  msg.dlc = 8;
  msg.data = "\x12\x21\x13\x31\x22\x34\x41\x15";

  // 发送 CAN 报文
  canWrite(ch, msg);
  printf("Single shot MsgId: %d\n", msg.id);
}

on Timer periodic {
  //在使用当前 CAN 报文 id后, 在下一次使用前依次递增
  msg.id = msgId++;

  //发送 CAN 报文
  canWrite(ch, msg);
  printf("Periodic MsgId: %d\n", msg.id);
  if (!timerIsPending(periodic)) {
    printf("Timer done!");
  }
}

on start {
  printf("Starting testlogger companion script\n");

  // 建立两个 CAN 通道并启动总线。
  // 这将覆盖二进制的设置,
  // 最主要的是通道将不再是安静模式。
  canBusOff(ch);
  canBusOff(ch + 1);
  canSetBitrate(ch, canBITRATE_1M);
  canSetBitrate(ch + 1, canBITRATE_1M);
  canSetBusOutputControl(ch, canDRIVER_NORMAL);
  canSetBusOutputControl(ch + 1, canDRIVER_NORMAL);
  canBusOn(ch);
  canBusOn(ch + 1);

  singleshot.timeout = 500; // 等待半秒钟
  periodic.timeout = 1000; // 一秒时间间隔

  // 启动单击计时器以发送第一个CAN 报文
  timerStart(singleshot);
  printf("Start periodic transmission\n");
}

on stop {
  printf("Stopping script\n");
  canBusOff(ch);
  canBusOff(ch + 1);
}

scc.exe
No input file found.
Script compiler for Kvaser t-script.
This is version 3.3.305 built on Sun Dec 13 19:38:53 2015.
Usage:
scc [-v -verbose] [-c] [-g] [-dx] [-devlines]
[-addsrc] [-comment=XXX]
[-pkey=N] [-skey=K]
@<filename>] [-dbase=<filename>] <filename>
where
-c Compile only. No output is produced.
-dbase=XXX.dbc Use the database XXX.dbc to define CAN messages
in the script.
-devlines Supress line numbers in generated code. Generates faster and
smaller code, but line numbers cannot be reported in exceptions.
-g Generate symbol tables for debug.
-addsrc Include the source code.
-comment=XXX Include the comment XXX.
Note that spaces can be used in arguments "like this".
Encryption of script and source code:
Script and source are protected by a symmetric crypto (-skey). The
symmetric key is then protected by a public key crypto (-pkey).
-pkey=N Use Kvaser public key number N.
Default:
0 - (no encryption) if no skey is entered
2 - (1024 bit RSA) if a skey is entered
-skey=K Use the symmetric key K.
If no K is entered and a pkey is, a random key K (hex)
will be generated for you
Key K formats:
-skey=0x11223344FFACAC - Hexadecimal format.
-skey=mysecretkey - ASCII format.
Contains multiple-precision arithmetic code originally written by
David Ireland, copyright (c) 2001-8 by D.I. Management Services Pty Limited
, and is used with permission.

scc.exe myCanGenerator.t -addsrc -comment="My CAN generator program v1.0"

2.2 生成配置

<?xml version="1.0" ?>
<!DOCTYPE KVASER>
<KVASER>
  <VERSION>2.0</VERSION>
  <BINARY_VERSION>6.0</BINARY_VERSION>
  <SETTINGS>
    <MODE fifo_mode="NO" log_all="NO"/>
    <CANPOWER timeout="5000"/>
  </SETTINGS>
  <CAN_BUS>
    <PARAMETERS bitrate="1000000" channel="0" silent="YES" sjw="1" tseg1="5" tseg2="2"/>
    <PARAMETERS bitrate="1000000" channel="1" silent="YES" sjw="1" tseg1="5" tseg2="2"/>
  </CAN_BUS>
  <TRIGGERBLOCK>
    <TRIGGERS>
      <TRIGGER_MSG_ID can_ext="NO" can_fd="NO" channel="0" msgid="3" msgid_min="3"
       name="trigger_0" protocol="NONE" timeout="0"/>
      <TRIGGER_MSG_ID can_ext="NO" can_fd="NO" channel="1" msgid="6" msgid_min="6"
       name="trigger_1" protocol="NONE" timeout="0"/>
      <TRIGGER_MSG_ID can_ext="NO" can_fd="NO" channel="1" msgid="3" msgid_min="3"
       name="trigger_2" protocol="NONE" timeout="0"/>
    </TRIGGERS>
    <STATEMENTS>
      <STATEMENT posttrigger="0" pretrigger="0">
        <EXPRESSION>trigger_0 OR trigger_2</EXPRESSION>
        <ACTIONS>
          <ACTION_START_LOG/>
        </ACTIONS>
      </STATEMENT>
      <STATEMENT posttrigger="2500" pretrigger="0">
        <EXPRESSION>trigger_1</EXPRESSION>
        <ACTIONS>
          <ACTION_STOP_LOG/>
        </ACTIONS>
      </STATEMENT>
    </STATEMENTS>
  </TRIGGERBLOCK>
  <SCRIPTS>
    <SCRIPT default_channel="0" primary="YES">
      <FILENAME>myCanGenerator.txe</FILENAME>
      <PATH></PATH>
    </SCRIPT>
  </SCRIPTS>
</KVASER>

2.3 验证配置

import canlib.kvaMemoLibXml as kvaMemoLibXml

xl = kvaMemoLibXml.kvaMemoLibXml()
print("kvaMemoLibXml version: v" + xl.getVersion())

# 读取 XML 配置文件
with open("config.xml", 'r') as myfile:
    config_xml = myfile.read()

# 验证 XML 配置
xl.kvaXmlValidate(config_xml)

# 获取验证报文
(countErr, countWarn) = xl.xmlGetValidationStatusCount()
print("Errors: %d, Warnings: %d" % (countErr, countWarn))

# 如果我们有任何验证错误, 打印它们
if countErr != 0:
    code = -1
    while code != 0:
        (code, text) = xl.xmlGetValidationError()
        print("%d: %s" % (code, text))

# 如果我们有任何验证警告, 打印它们
if countWarn != 0:
    code = -1
    while code != 0:
        (code, text) = xl.xmlGetValidationWarning()
        print("%d: %s" % (code, text))

# 如果没有任何验证错误或警告，那么退出
if countErr != 0 or countWarn != 0:
    raise Exception('Please fix validation Errors/Warnings.')

注释

开始使用kvmlib

进一步了解kvmlib