Parameter control not working

[elagil]

Hello,

I followed the documentation on adding parameters by means of mergeparameters to my DSP profile .xml - this shall allow me to use volume control in the end.

For this purpose, my application includes a volume control slider, which was labeled "Volume". Indeed, mergeparameters correctly detects the volume control register:

$ mergeparameters blus_XT25TG-30_22W_4534G00_v1.xml blus_XT25TG-30_22W_4534G00_v1.params
added parameters to XML profile:
  volumeControlRegister

and adds it to the .xml correctly as well:

<?xml version="1.0" encoding="utf-8"?>
<ROM IC="ADAU1452" IC_Address="1" Address_byte_length="2">
        <beometa>
                <metadata type="volumeControlRegister">272</metadata>
        </beometa>
        <dateTime>2021-09-11T11:11:15.0679920Z</dateTime>
        <version>4.6.0.1812</version>
        <page modetype="Mode 0">
                <action instr="writeXbytes" len="4" addr="62464" AddrIncr="0" ParamName="IC 2.HIBERNATE" DspName="IC 2">00 01</action>
                <action instr="delay" ParamName="IC 2.Hibernate Delay" DspName="IC 2">00 FF</action>
// more code ...

Then, I load this file to my DSP with

dsptoolkit install-profile profile/blus_XT25TG-30_22W_4534G00_v1.xml

which works fine, and after

dsptoolkit reset

the application is correctly loaded from EEPROM and the DSP runs as expected.

Now the problem is that the volume control parameter cannot be used, as it says

$ dsptoolkit get-volume
Profile doesn't support volume control

Having a look at the logs for sigmatcp:

$ sudo service sigmatcp status
● sigmatcp.service - SigmaTCP Server for HiFiBerry DSP
   Loaded: loaded (/lib/systemd/system/sigmatcp.service; enabled; vendor preset: enabled)
   Active: active (running) since Sat 2021-09-11 12:28:24 BST; 8min ago
 Main PID: 623 (sigmatcpserver)
    Tasks: 1 (limit: 1438)
   CGroup: /system.slice/sigmatcp.service
           └─623 /usr/bin/python3 /usr/local/bin/sigmatcpserver --alsa

Sep 11 12:29:20 raspberrypi sigmatcpserver[623]: INFO:root:writing XML file: b'<?xml version="1.0" encoding="utf-8"?>\n<ROM IC="ADAU1452" IC_Address="1" Address_byte_length="2">\n\t<beometa>\n\t\t<metadata type="volume
Sep 11 12:29:20 raspberrypi sigmatcpserver[623]: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
Sep 11 12:29:20 raspberrypi sigmatcpserver[623]: D C0 00 08 0F 8D 84 00 FC C0 00 08 0F 8D 94 01 01 C0 00 00 18 82 80 1D BE C0 00 00 18 82 80 9D BE 0C 41 FD A0 00 10 80 41 0D 40 01 01 00 40 20 08 C0 00 00 10 82 CC 1D DE
Sep 11 12:29:20 raspberrypi sigmatcpserver[623]: INFO:root:preparing for memory update
Sep 11 12:29:48 raspberrypi sigmatcpserver[623]: INFO:root:finished memory update
Sep 11 12:29:49 raspberrypi sigmatcpserver[623]: INFO:root:caching program memory checksum
Sep 11 12:29:49 raspberrypi sigmatcpserver[623]: INFO:root:reading profile /var/lib/hifiberry/dspprogram.xml
Sep 11 12:30:07 raspberrypi sigmatcpserver[623]: ERROR:root:can't get attribute volumeControlRegister from XML

It cannot read the attribute from the XML. I checked the file /var/lib/hifiberry/dspprogram.xml, and it was correctly copied from my input .xml, so does contain the volumeControlRegister field.

What is the problem here? Thanks in advance.

[elagil]

I now simply added the checksum field and it suddenly works. Is the checksum field not optional, but actually mandatory?

[hifiberry]

Checksum is require for mergeparameters