Using 1-bit mode when loading file from SD

[MarianoDesivo]

On my protoboard, the 4-bit mode does not work

So I use the 1-bit mode when working on C++ (which works at any speed)

Is it possible to use the 1-bit mode on Oopsy?

/** Sets whether 4-bit mode or 1-bit mode is used for the SDMMC */

enum class BusWidth

{
    BITS_1, /**< Only 1 bit of data per clock is transferred */

    BITS_4, /**< 4-bits of parallel data for each clock pulse */

};

[grrrwaaa]

From a quick test here, that does seem to work.

I've pushed that change to the dev branch, i fyou want to try it.

[MarianoDesivo]

I can't find where to set 1-bit mode or 4-bit mode

[grrrwaaa]

Ah -- you can try checking out the dev branch of Oopsy using git, and building from there (replacing your current installation of Oopsy).

Or, since it is such a simple change, you can just go into the file /source/genlib_daisy.h, and in the function sdcard_init(), just before the line handler.Init(sdconfig);, add the code:

sdconfig.width = daisy::SdmmcHandler::BusWidth::BITS_1;

[stephenhensley]

This is something we'll probably want to be configurable either through the bpatcher or the board-definition json. The difference in performance is pretty substantial.

That said when breadboarding stuff it can be hard to get 4-bit working at the fastest speeds. It can also be preferable to use the 1-bit, and have the extra 3 pins available for other things.

[grrrwaaa]

Ah -- that makes sense. OK, when we move the SDcard setup to the JSON we can configure it there.

BTW, there was another user saying they were having intermittent failure when loading multiple files at startup -- sometimes it would read them all, sometimes only a few of them. Could that be related? (I think the user post was in the Slack for Daisy/Oopsy)

[stephenhensley]

Hmm, not sure. Could be. Do you remember if they were using the patch or were wiring something up themselves?

If we're loading stuff into RAM and not directly processing it, then it doesn't really matter too much (just the difference in initial load time), but if we add any sort of file streaming directly from the SD card then it would start to matter a bit more.

[MarianoDesivo]

@grrrwaaa I downloaded the dev branch as you said

I checked the genlib_daysi.h (it is 1-bit mode)

void sdcard_init() {
			daisy::SdmmcHandler::Config sdconfig;
			sdconfig.Defaults(); // 4-bit, 50MHz
			// sdconfig.clock_powersave = false;
			// sdconfig.speed           = daisy::SdmmcHandler::Speed::FAST;
			sdconfig.width           = daisy::SdmmcHandler::BusWidth::BITS_1;
			handler.Init(sdconfig);
			dsy_fatfs_init();
			f_mount(&SDFatFS, SDPath, 1);
		}

On that folder, I opened oopsy-dev\examples\sdcard-minimal.maxpat

I run it on my daysi but does not work (I copied the drumloop.wav on my SD)

I checked with C++ (WavPlayer.cpp with 1-bit mode) and it works, playing drumloop.wav on my daisy

[MarianoDesivo]

BTW, there was another user saying they were having intermittent failure when loading multiple files at startup -- sometimes it would read them all, sometimes only a few of them. Could that be related? (I think the user post was in the Slack for Daisy/Oopsy)

I think you are talking about this one

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