beremiz: tests/genericmake/plc.xml@68f4f2d4516b

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' encoding='utf-8'?>
<project xmlns:ns1="http://www.plcopen.org/xml/tc6_0201" xmlns:xhtml="http://www.w3.org/1999/xhtml" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://www.plcopen.org/xml/tc6_0201">
  <fileHeader companyName="Unknown" productName="Unnamed" productVersion="1" creationDateTime="2014-01-19T11:14:47" contentDescription="This example shows how you can customize build process by using 'make'.&#10;"/>
  <contentHeader name="Makefile Example" modificationDateTime="2018-08-24T13:12:10">
    <coordinateInfo>
      <fbd>
        <scaling x="0" y="0"/>
      </fbd>
      <ld>
        <scaling x="0" y="0"/>
      </ld>
      <sfc>
        <scaling x="0" y="0"/>
      </sfc>
    </coordinateInfo>
  </contentHeader>
  <types>
    <dataTypes/>
    <pous>
      <pou name="program0" pouType="program">
        <interface>
          <localVars>
            <variable name="LocalVara">
              <type>
                <INT/>
              </type>
            </variable>
            <variable name="LocalVarb">
              <type>
                <INT/>
              </type>
            </variable>
          </localVars>
        </interface>
        <body>
          <FBD>
            <inVariable localId="1" executionOrderId="0" height="30" width="77" negated="false">
              <position x="52" y="424"/>
              <connectionPointOut>
                <relPosition x="77" y="15"/>
              </connectionPointOut>
              <expression>LocalVara</expression>
            </inVariable>
            <outVariable localId="2" executionOrderId="0" height="30" width="77" negated="false">
              <position x="167" y="424"/>
              <connectionPointIn>
                <relPosition x="0" y="15"/>
                <connection refLocalId="1">
                  <position x="167" y="439"/>
                  <position x="129" y="439"/>
                </connection>
              </connectionPointIn>
              <expression>LocalVarb</expression>
            </outVariable>
            <comment localId="3" height="385" width="760">
              <position x="32" y="23"/>
              <content>
                <xhtml:p><![CDATA[This example shows how you can customize build process by using 'make'.

Sometimes special steps need to be done to build entire project.
But it's not necessary to create another target in Beremiz every time you need to customize something in build process.  Just use for that 'Generic' target and describe all necessary steps in Makefile. 

For example, you can 
 - preprocess generated by Beremiz C source files, 
 - do some fancy source code transformation using any tools you want, 
 - use any compiler you want,
 - call static analyzers,
 - run integration tests on the project,
 - upload source code to external build server,
 - upload to the target and compile it there,
 - flash/transfer your compiled binary to the target,
 and much much more.
]]></xhtml:p>
              </content>
            </comment>
          </FBD>
        </body>
      </pou>
    </pous>
  </types>
  <instances>
    <configurations>
      <configuration name="config">
        <resource name="resource1">
          <task name="Tsk" priority="0" interval="T#100ms">
            <pouInstance name="Inst" typeName="program0"/>
          </task>
        </resource>
      </configuration>
    </configurations>
  </instances>
</project>

author	Andrey Skvortsov <andrej.skvortzov@gmail.com>
	Sun, 06 Jan 2019 01:22:46 +0300
changeset 2499	68f4f2d4516b
parent 2296	a2ab363f9e90
permissions	-rw-r--r--