Mercurial Mercurial > beremiz / file revision
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
tests/canopen_master/canopen@canfestival/master@CanOpenNode/master.od
author Andrey Skvortsov <andrej.skvortzov@gmail.com>
Sun, 06 Jan 2019 01:22:46 +0300
changeset 2499 68f4f2d4516b
parent 411 8261c8f1e365
permissions -rw-r--r--
use pregenerated CRC32 lookup tables for retain on Win32 and GNU/Linux

This code could be possible reused on low-end targets with limited RAM.

code to generate lookup table:
[---------------------------------------------------------------------]

/* CRC lookup table and initial state. */
uint32_t crc32_table[256];

/* Generate CRC32 lookup table. */
void GenerateCRC32Table(void)
{
unsigned int i, j;
/* Use CRC-32-IEEE 802.3 polynomial 0x04C11DB7 (bit reflected). */
uint32_t poly = 0xEDB88320;

for (i = 0; i <= 0xFF; i++)
{
uint32_t c = i;
for (j = 0 ; j < 8 ; j++)
c = (c & 1) ? (c >> 1 ) ^ poly : (c >> 1);
crc32_table[i] = c;
}
}

void main(void)
{
GenerateCRC32Table();
int j=0;
for(int i=0; i<256; i++) {
printf("0x%08X, ", crc32_table[i]);
if (++j >= 8) {
j = 0;
printf("\n");
}
}
}
[---------------------------------------------------------------------] 
<?xml version="1.0"?>
<!DOCTYPE PyObject SYSTEM "PyObjects.dtd">
<PyObject module="node" class="Node" id="173548044">
<attr name="Profile" type="dict" id="173547276" >
</attr>
<attr name="Description" type="string" value="" />
<attr name="Dictionary" type="dict" id="173547004" >
  <entry>
    <key type="numeric" value="4096" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="4097" />
    <val type="numeric" value="0" />
  </entry>
  <entry>
    <key type="numeric" value="4120" />
    <val type="list" id="172243596" >
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
      <item type="numeric" value="0" />
    </val>
  </entry>
</attr>
<attr name="SpecificMenu" type="list" id="172243852" >
</attr>
<attr name="ParamsDictionary" type="dict" id="173551796" >
</attr>
<attr name="UserMapping" type="dict" id="173551932" >
</attr>
<attr name="DS302" type="dict" id="172206524" >
  <entry>
    <key type="numeric" value="7968" />
    <val type="dict" id="172959508" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="172244812" >
          <item type="dict" id="173546596" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="173552204" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="15" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Store DCF for node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Store DCF" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
  <entry>
    <key type="numeric" value="7969" />
    <val type="dict" id="173546732" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="172253420" >
          <item type="dict" id="173552612" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="173546324" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="2" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Storage Format for Node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Storage Format" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
  <entry>
    <key type="numeric" value="7970" />
    <val type="dict" id="173552476" >
      <entry>
        <key type="string" value="need" />
        <val type="False" value="" />
      </entry>
      <entry>
        <key type="string" value="values" />
        <val type="list" id="172253484" >
          <item type="dict" id="173552884" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="ro" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="5" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Number of Entries" />
            </entry>
          </item>
          <item type="dict" id="173552748" >
            <entry>
              <key type="string" value="access" />
              <val type="string" value="rw" />
            </entry>
            <entry>
              <key type="string" value="pdo" />
              <val type="False" value="" />
            </entry>
            <entry>
              <key type="string" value="type" />
              <val type="numeric" value="15" />
            </entry>
            <entry>
              <key type="string" value="name" />
              <val type="string" value="Concise DCF for Node %d[(sub)]" />
            </entry>
            <entry>
              <key type="string" value="nbmax" />
              <val type="numeric" value="127" />
            </entry>
          </item>
        </val>
      </entry>
      <entry>
        <key type="string" value="name" />
        <val type="string" value="Concise DCF" />
      </entry>
      <entry>
        <key type="string" value="struct" />
        <val type="numeric" value="7" />
      </entry>
    </val>
  </entry>
</attr>
<attr name="ProfileName" type="string" value="None" />
<attr name="Type" type="string" value="master" />
<attr name="ID" type="numeric" value="0" />
<attr name="Name" type="string" value="MasterNode" />
</PyObject>
beremiz