From: Jeff Goode <jeffg7_at_gmail.com>
Date: Sat, 20 Jun 2009 18:13:03 -0400

David Johnston wrote:
> Okay, after a little exploring I haven't found any further answers, so
> let me rephrase my question.
>
> How can I modify an entry in global_settings and have that be
> persistent -- that is, that it'll be the same when I reboot?
>
> I've found other places in the code where the same problem occurs as
> the one I'm having. For instance, on the recording screen (not the
> recording menu) if you change the AGC setting and then reboot, the
> setting will remain at its previous value. But if you change the AGC
> setting on the record screen, then change an unrelated setting via the
> menu, the AGC setting _will_ be saved on shutdown.
>
> Here's the code that decrements the AGC setting in the record screen:
>
> ---
> case ITEM_AGC_MODE:
> agc_preset = MAX(agc_preset - 1, 0);
> agc_enable = (agc_preset != 0);
> #ifdef HAVE_MIC_REC
> if (global_settings.rec_source == AUDIO_SRC_MIC) {
> global_settings.rec_agc_preset_mic =
> agc_preset;
> agc_maxgain =
> global_settings.rec_agc_maxgain_mic;
> } else
> #endif /* MIC */
> {
> global_settings.rec_agc_preset_line =
> agc_preset;
> agc_maxgain =
> global_settings.rec_agc_maxgain_line;
> }
> ---
>
> Somehow the menu system lets Rockbox know that settings have changed,
> but just changing a value in global_settings doesn't.

Hi David,

It appears that the menu system calls the settings_save() function in
settings.c when an item is changed, which saves the user settings
struct. I think all you'd have to do is call this function (be sure to
#include settings.h) whenever your value changes. Give it a try
anyway. While you're at it, fix the above bug too. :)

Jeff
Received on 2009-06-21