MIDI not working when using SRAM from bootloader program

keyth72 · June 18, 2024, 9:37am

I’m using essentially the example midi example code from here:

electro-smith/DaisyExamples/blob/master/patch/Midi/Midi.cpp

#include "daisy_patch.h"
#include "daisysp.h"
#include <string>

using namespace daisy;
using namespace daisysp;

DaisyPatch hw;
Oscillator osc;
Svf        filt;

void AudioCallback(AudioHandle::InputBuffer  in,
                   AudioHandle::OutputBuffer out,
                   size_t                    size)
{
    float sig;
    for(size_t i = 0; i < size; i++)
    {
        sig = osc.Process();
        filt.Process(sig);

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I’m able to receive midi messages properly when running the program from flash, but not when running from SRAM with the same program. I’d like to use midi with some of my larger sram programs. Is there something different you have to do to get this working?

Edit: it might be due to some heavy processing in the audio callback. Will run some tests and update here.

Update: Ran some tests, it’s seems to definitively be running from SRAM that’s causing midi to be unresponsive. Exact same program running in Flash works fine.

Thanks!

Corvus_Prudens · June 25, 2024, 7:04pm

Do you happen to know what version of the bootloader you’re using? The older versions (< v6) had some issues with the OLED pins, in which case the screen would appear to not work.

keyth72 · June 25, 2024, 7:23pm

@Corvus_Prudens I’m using the bootloader on the Daisy Web Programmer, as of yesterday.

Thanks!

dreamer · June 25, 2024, 7:51pm

The web programmer has not been updated in the past 2 years. The bootloader version is v5.4: GitHub - electro-smith/Programmer: WebUSB programmer for Daisy (and other DFU-compatible chips/boards).

keyth72 · June 25, 2024, 7:53pm

Oh wow! I’ll try with the latest version and report back.

keyth72 · June 26, 2024, 12:19am

Using the latest bootloader from the command line, instead of the one in the web app worked! Receiving midi on my sram program now, thanks all!!