Bit enable/disable in RR definitions

mrf582 · **Posted:** Fri Mar 07, 2014 12:33 am

Is there a way to only enable/disable a particular bit of a byte using RR? Like if I wanted to only enable/disable Bit 3 of a Byte while leaving everything else alone? I know I can hard code the whole byte to a particular value using a switch but what if different ROMs had various bits set but I only wanted to flip a certain bit while leaving the others alone?

dschultz · **Posted:** Fri Mar 07, 2014 3:16 am

Yes.
Add a bit attribute to the address element for that parameter.

Code:

The bit is 0 base so you can use 0 - 7, where 7 is the most significant and 0 is least.

A complete example:

Code:

<ecuparam id="E2000" name="Switch bit 3" desc="E1403 [ 1 = On and 0 = Off ]" target="1">
  <ecu id="0123456789">
    <address bit="3">0xFF650D</address>
  </ecu>
  <conversions>
    <conversion units="On/Off" expr="x" format="0" gauge_min="0" gauge_max="1" gauge_step="1" />
  </conversions>
</ecuparam>

mrf582 · **Posted:** Sat Mar 08, 2014 4:39 pm

Kickass! Thanks.

mrf582 · **Posted:** Tue Mar 11, 2014 3:09 am

Is that for RR or for ECUflash? I can't figure out where to add that. Figured the whole thing can go into a specific ECU version section. But I don't know what I'm doing. Sorry for being a n00b.

I want to add Bit 3 enable/disable at address 0x8h for the following definition file.

Quote:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xhtml1-lat1 [
<!ELEMENT xhtml1-lat1 (#PCDATA)>
<!ENTITY deg "°" >
<!ENTITY micro "µ" >
]>
<roms>
<rom>

<romid>
<xmlid>BMWMS41BASE</xmlid>
<internalidaddress>0000</internalidaddress>
<internalidstring>00000000</internalidstring>
<ecuid>00000000</ecuid>
<year>1996-1999</year>
<market>USDM</market>
<make>BMW</make>
<model>M3</model>
<submodel>E36</submodel>
<transmission>MT</transmission>
</romid>

<table type="2D" name="Speed Limiter D" category="Speed Limiter" storagetype="uint8" sizey="6" userlevel="1">
<scaling units="km/h" expression="x" to_byte="x" format="0" fineincrement="1" coarseincrement="10" />
<table type="Y Axis" name="???" storagetype="uint8" sizey="6">
<scaling units="???" expression="x" to_byte="x" format="0" fineincrement="1" coarseincrement="10" />
</table>
<description>Speed limiter</description>
</table>

</rom>

<rom base="BMWMS41BASE">

<romid>
<xmlid>0912</xmlid>
<internalidaddress>C</internalidaddress>
<internalidstring>0912</internalidstring>
<ecuid>00000000</ecuid>
<year>1996-1999</year>
<market>USDM</market>
<make>BMW</make>
<model>M3</model>
<submodel>E36</submodel>
<transmission>MT</transmission>
<memmodel>80C166W-M-T3</memmodel>
<filesize>24kb</filesize>
</romid>

<table name="Speed Limiter D" storageaddress="0x1956">
<table type="Y Axis" storageaddress="0x1381" />
</table>

</rom>
</roms>

dschultz · **Posted:** Tue Mar 11, 2014 1:37 pm

Oh, what I posted was for Logging bits.
I think the Editor would need a new Custom parser to perform bitwise operations.

So for now you will need to stick to the 'uint8' type and then enter a byte with the bits set or cleared as you desire.

mrf582 · **Posted:** Tue Mar 11, 2014 2:33 pm

Oh, ok thanks.

mr_hollywood · **Joined:** Tue Mar 18, 2014 8:56 pm **Posts:** 1

Hi guys,

I'm looking to group 8 bit "switches" together to display or modify the value of a single byte at a specified address in a definition file. Can that be done in the current version of RomRaider?

Thanks,

RomRaider

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