Nice work for getting this working!
I’m just trying to port this to the other daisy way, with vs code.
Getting a little stuck with porting properly. Using the patch’s OLED screen. Wanted to port exactly for now, but getting stuck.
Could be the micros() call, or the updating screen is slightly different with oled library in libdaisy.
#include "daisysp.h"
#include "daisy_patch.h"
#include "CircularBuffer.h"
#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
using namespace daisy;
using namespace daisysp;
DaisyPatch patch;
#define DISPLAY_WIDTH 128
#define DISPLAY_HEIGHT 64
#define CHUNK 6
const unsigned long period = 16777; //period of time to perform an OLED update, in microseconds
unsigned long previousTime, currentTime;
uint64_t currentCount, previousCount;
uint8_t hKnob, vKnob;
float addIn, avg; //average of samples
int lastSmpl; //used in OLED draw
unsigned long avgPeriod = 6; //number of 6 sample 'chunks' to average, larger period means slower horizontal scaling
int vScale = 2; //vertical scaling amount
int previousValue;
CircularBuffer<float, DISPLAY_WIDTH> buf;
bool draw;
void updateOLED(int x, float val);
void starter();
static void AudioCallback(AudioHandle::InputBuffer in,
AudioHandle::OutputBuffer out,
size_t size)
{
for(size_t i = 0; i < size; i++)
{
for(size_t chn = 0; chn < 2; chn++)
{
out[chn][i] = in[chn][i]; //bypass audio
addIn += in[chn][i]; //continuously add up incoming values
}
}
currentCount++;
if(currentCount - previousCount >= avgPeriod)
{
avg += addIn;
avg /= CHUNK * avgPeriod;
buf.push(avg * vScale);
if(buf.isFull())
{
buf.shift();
}
avg = 0;
addIn = 0;
draw = true;
previousCount = currentCount;
}
}
int main(void)
{
patch.Init();
starter();
patch.StartAudio(AudioCallback);
patch.StartAdc();
patch.display.Fill(false);
while(1)
{
unsigned long currentTime = patch.seed.system.GetNow();
if(draw)
{
if(currentTime - previousTime >= period)
{
patch.display.Fill(false);
for(int i = DISPLAY_WIDTH; i > 0; i--)
{
float y = buf[i];
int x = i;
updateOLED(x, y);
}
patch.display.Fill(true);
patch.display.Update();
draw = false;
previousTime = currentTime;
}
}
avgPeriod = 6;
vScale = 2;
}
}
void starter()
{
lastSmpl = 16;
draw = false;
patch.SetAudioBlockSize(CHUNK);
}
void updateOLED(int x, float val) {
float y = (val + 1) / 2 * DISPLAY_HEIGHT; //map the incoming averaged value from -1, 1 to 0, displayHeight
float currentSmpl = constrain(y, 0, DISPLAY_HEIGHT - 1); //create currentSmpl value from y and constrain to displayHeight
patch.display.DrawLine(x, lastSmpl, x + 1, currentSmpl, true); //draw a line from last sample to current sample
lastSmpl = currentSmpl; //reassign last sample as the current one
}
If anyone with a Patch could have a look that’d be great. I think things are roughly in the right places, but I’m just getting a blank white screen and nothing else.
