SAMD21 Add Flash

Add Flash Chip

The Flash chip [GD25Q16] is available from Adafruit

Adafruit QTPY

Settup refer to The Adafruit settup guide

Applications

Sound production

Download and expand sounds.zip The sounds were all converted to 8 bit and 8000 samples persecond to reduce size on the flash.
I use the Goldwave program to manipulate sound files

Coyote Simulator.

First double click the reset button. This will put the QTPY into Circuit Py modes and the device will show up as a Drive named "QTPY_BOOT"
Download qtpy_m0_haxpress and then drag the file into the "QTPY_BOOT" .
This program will load onto the QTPY and then expose the Flash and rename the device to "CIRCUIPY".
at this point you can drag the sounds into the QTPY Flash by treating CIRCUIPY as a flash drive.
Now the files are on the flash and can be accessed by the Samd21. Note: right now there is no way to play sounds using Python .

We have prepared a sound program sketch to play the files, because there was no QTPY library

QTPY play sounds randomly ---> player-rand.ino

#include <Arduino.h> #include <SPI.h> #include "SdFat.h" #include "Adafruit_SPIFlash.h" #include "Adafruit_ZeroTimer.h" // Uncomment to run example with custom SPI and SS e.g with FRAM breakout // #define CUSTOM_CS A5 // #define CUSTOM_SPI SPI #if defined(CUSTOM_CS) && defined(CUSTOM_SPI) Adafruit_FlashTransport_SPI flashTransport(CUSTOM_CS, CUSTOM_SPI); #elif CONFIG_IDF_TARGET_ESP32S2 // ESP32-S2 use same flash device that store code. // Therefore there is no need to specify the SPI and SS Adafruit_FlashTransport_ESP32 flashTransport; #else // On-board external flash (QSPI or SPI) macros should already // defined in your board variant if supported // - EXTERNAL_FLASH_USE_QSPI // - EXTERNAL_FLASH_USE_CS/EXTERNAL_FLASH_USE_SPI #if defined(EXTERNAL_FLASH_USE_QSPI) Adafruit_FlashTransport_QSPI flashTransport; #elif defined(EXTERNAL_FLASH_USE_SPI) Adafruit_FlashTransport_SPI flashTransport(EXTERNAL_FLASH_USE_CS, EXTERNAL_FLASH_USE_SPI); #else #error No QSPI/SPI flash are defined on your board variant.h ! #endif #endif Adafruit_SPIFlash flash(&flashTransport); // file system object from SdFat FatFileSystem fatfs; File myFile; // This example can have just about any frequency for the callback // automatically calculated! float freq = 8000.0; // 8 KHz int phase = 0; int fnote = 0; int val =0; int writebufcounter = 0; int writebufpointer = 0; int readbufcounter = 0; int readbufpointer = 0; byte bval=0; byte fval=0; byte soundbuffer[2][256]; bool bufferfull[2]; int soundbytes; int whichbuf =0; int filenumb; char filenumber[10]; char filename[10]; // timer tester Adafruit_ZeroTimer zerotimer = Adafruit_ZeroTimer(3); void TC3_Handler() { Adafruit_ZeroTimer::timerHandler(3); } // the timer callback void TimerCallback0(void){ digitalWrite(9, LOW); //read buffer till all read and make it not full if (bufferfull[readbufpointer]==true){ bval = soundbuffer[readbufpointer][readbufcounter]; readbufcounter++; if (readbufcounter>255){ bufferfull[readbufpointer] = false; //enable file to write if (readbufpointer==0) digitalWrite(6, LOW); if (readbufpointer==1) digitalWrite(7, LOW); readbufcounter = 0; readbufpointer = 1 & (readbufpointer ^1); // point to the other buffer } } else { bval = 0x80; } val = ((int)bval<<2)&0x3ff; analogWrite(0, val ); digitalWrite(9, HIGH); } void play(const char *fname) { bufferfull[0]=false; bufferfull[1]=false; writebufpointer =0; readbufpointer =0; digitalWrite(8, HIGH); myFile = fatfs.open(fname); if (myFile) { Serial.println(fname); Serial.println(myFile.size()); Serial.println("b4readin"); } for(int i =0; i<44; i++) myFile.read(); // eliminate header Serial.println("counted44"); while (soundbytes = myFile.available()) { // find out how may bytes are still available if (bufferfull[writebufpointer]==false){ //buffer available fval= myFile.read(); //Serial.write(fval); soundbuffer[writebufpointer][writebufcounter] = fval; // fill sound buffer writebufcounter++; if (writebufcounter>255){ bufferfull[writebufpointer] = true; //stop file to write if (writebufpointer==0) digitalWrite(6, HIGH); if (writebufpointer==1) digitalWrite(7, HIGH); writebufcounter = 0; writebufpointer = 1 & (writebufpointer ^1);; // point to the other buffer } } } // file is done reading, see if there is still a buffer to fill while (bufferfull[writebufpointer]=false){ soundbuffer[writebufpointer][writebufcounter] = 0x80; // fill sound buffer with audio 0 writebufcounter++; if (writebufcounter>255){ bufferfull[writebufpointer] = true; if (writebufpointer==0) digitalWrite(6, HIGH); if (writebufpointer==1) digitalWrite(7, HIGH); writebufcounter = 0; } //DONE } digitalWrite(8, LOW); } void setup() { // Open serial communications and wait for port to open: Serial.begin(115200); while (!Serial) { delay(1); // wait for serial port to connect. Needed for native USB port only } Serial.print("Initializing Filesystem on external flash..."); // Init external flash flash.begin(); // Open file system on the flash if ( !fatfs.begin(&flash) ) { Serial.println("Error: filesystem is not existed. Please try SdFat_format example to make one."); while(1) yield(); } Serial.println("initialization done."); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(8, OUTPUT); pinMode(9, OUTPUT); tc_clock_prescaler prescaler = TC_CLOCK_PRESCALER_DIV1; zerotimer.enable(false); zerotimer.configure(prescaler, // prescaler =1 TC_COUNTER_SIZE_16BIT, // bit width of timer/counter TC_WAVE_GENERATION_MATCH_PWM // frequency or PWM mode ); zerotimer.setCompare(0, 6000); // 48000000/8000 = 6000 zerotimer.setCallback(true, TC_CALLBACK_CC_CHANNEL0, TimerCallback0); zerotimer.enable(true); } void loop() { filename[0]=0; filenumb = random(36); itoa(filenumb,filenumber,10); strcat(filename,filenumber); strcat(filename, ".wav"); Serial.println(filename); play(filename); delay(1000); }

The above program will play sounds automatically, but we want controll over the sounds and we want controll remotely so the Coyote box could be placed far from the house
To solution is to use a LORA relay . To use Lora first you need a Yolink Hub connected to your internet and the Yolink app on your phone

1. Install the YoLink app
2. Install the Hub or SpeakerHub (not included), add to the app (scan & play). Follow instructions provided with the Hub
3. Add the Yolink Relay to the app

The sketch is modified to talk when the relay is activated

The circuit is a little more complicated .
1. the input viltage is 12 Volts, needed for the power amp, so the QTPY needs a 5 volt regulator LM7805
2. The old Radio Shack Realistic AMP I'm using requires a power amp as a preamp I will use the LM380
3. External controll is provided by the Yolink Relay

QTPY play sounds randomly starting at 40.wav to 42.wav with relay control---> player-rand40relay.ino

#include <Arduino.h>
#include <SPI.h>
#include "SdFat.h"
#include "Adafruit_SPIFlash.h"
#include "Adafruit_ZeroTimer.h"

// Uncomment to run example with custom SPI and SS e.g with FRAM breakout
// #define CUSTOM_CS   A5
// #define CUSTOM_SPI  SPI

#if defined(CUSTOM_CS) && defined(CUSTOM_SPI)
  Adafruit_FlashTransport_SPI flashTransport(CUSTOM_CS, CUSTOM_SPI);

#elif CONFIG_IDF_TARGET_ESP32S2
  // ESP32-S2 use same flash device that store code.
  // Therefore there is no need to specify the SPI and SS
  Adafruit_FlashTransport_ESP32 flashTransport;

#else
  // On-board external flash (QSPI or SPI) macros should already
  // defined in your board variant if supported
  // - EXTERNAL_FLASH_USE_QSPI
  // - EXTERNAL_FLASH_USE_CS/EXTERNAL_FLASH_USE_SPI
  #if defined(EXTERNAL_FLASH_USE_QSPI)
    Adafruit_FlashTransport_QSPI flashTransport;

#elif defined(EXTERNAL_FLASH_USE_SPI)
    Adafruit_FlashTransport_SPI flashTransport(EXTERNAL_FLASH_USE_CS, EXTERNAL_FLASH_USE_SPI);

#else
    #error No QSPI/SPI flash are defined on your board variant.h !
  #endif
#endif
Adafruit_SPIFlash flash(&flashTransport);

// file system object from SdFat
FatFileSystem fatfs;
File myFile;

// This example can have just about any frequency for the callback
// automatically calculated!
float freq = 8000.0; // 8 KHz
int phase = 0;
int fnote  = 0;
int val =0;
int writebufcounter = 0;
int writebufpointer = 0;
int readbufcounter = 0;
int readbufpointer = 0;
byte bval=0;
byte fval=0;
byte soundbuffer[2][256];
bool bufferfull[2];

int soundbytes;

int whichbuf =0;
int filenumb;
char   filenumber[10];
char   filename[10];

// timer tester
Adafruit_ZeroTimer zerotimer = Adafruit_ZeroTimer(3);

void TC3_Handler() {
  Adafruit_ZeroTimer::timerHandler(3);
}

// the timer callback

void TimerCallback0(void){
	digitalWrite(9, LOW);
  //read buffer till all read and make it not full
	if (bufferfull[readbufpointer]==true){
  	bval = soundbuffer[readbufpointer][readbufcounter];
  	 readbufcounter++;
  	if (readbufcounter>255){

bufferfull[readbufpointer] = false;  //enable file to write
     if (readbufpointer==0)  digitalWrite(6, LOW);
     if (readbufpointer==1)  digitalWrite(7, LOW);

readbufcounter = 0;
	  	readbufpointer  = 1 & (readbufpointer ^1);  // point to the other buffer
  		}

}
 	else {
 		bval = 0x80;
 		}

val = ((int)bval<<2)&0x3ff;
   analogWrite(0, val );

digitalWrite(9, HIGH);
   }

void play(const char *fname) {
bufferfull[0]=false;
bufferfull[1]=false;
writebufpointer =0;
readbufpointer =0;
digitalWrite(8, HIGH);
myFile = fatfs.open(fname);
if (myFile) {
	Serial.println(fname);
	Serial.println(myFile.size());
	Serial.println("b4readin");
}

for(int i =0; i<44; i++)
	        myFile.read();   // eliminate header
    Serial.println("counted44");

while (soundbytes = myFile.available()) {  // find out how may bytes are still available

if (bufferfull[writebufpointer]==false){   //buffer available
    		fval= myFile.read();
		//Serial.write(fval);
    		soundbuffer[writebufpointer][writebufcounter]  = fval;  // fill sound buffer
		writebufcounter++;
		if (writebufcounter>255){
		  		bufferfull[writebufpointer] = true;  //stop file to write
          if (writebufpointer==0)  digitalWrite(6, HIGH);
          if (writebufpointer==1)  digitalWrite(7, HIGH);
		  		writebufcounter = 0;
		  		writebufpointer  = 1 & (writebufpointer ^1);;  // point to the other buffer
  				}
	}
    }

// file is done reading, see if there is still a buffer to fill

while (bufferfull[writebufpointer]=false){

soundbuffer[writebufpointer][writebufcounter]  = 0x80;  // fill sound buffer  with audio 0
	writebufcounter++;
	if (writebufcounter>255){
		bufferfull[writebufpointer] = true;
     if (writebufpointer==0)  digitalWrite(6, HIGH);
     if (writebufpointer==1)  digitalWrite(7, HIGH);
		writebufcounter = 0;
		}
		//DONE
}
digitalWrite(8, LOW);
    }

void setup() {

// Open serial communications and wait for port to open:
  Serial.begin(115200);

delay(100); // wait for serial port to connect. Needed for native USB port only

Serial.print("Initializing Filesystem on external flash...");

// Init external flash
    flash.begin();

// Open file system on the fla
    if ( !fatfs.begin(&flash) ) {
      Serial.println("Error: filesystem is not existed. Please try SdFat_format example to make one.");
      while(1) yield();
    }

Serial.println("initialization done.");
  pinMode(3, INPUT_PULLUP);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);

tc_clock_prescaler prescaler = TC_CLOCK_PRESCALER_DIV1;

zerotimer.enable(false);
  zerotimer.configure(prescaler,       // prescaler =1
          TC_COUNTER_SIZE_16BIT,       // bit width of timer/counter
          TC_WAVE_GENERATION_MATCH_PWM // frequency or PWM mode
          );

zerotimer.setCompare(0, 6000);   // 48000000/8000 = 6000
  zerotimer.setCallback(true, TC_CALLBACK_CC_CHANNEL0, TimerCallback0);
  zerotimer.enable(true);
}

void loop() {

if ( digitalRead(3)==LOW) {
  filename[0]=0;
  filenumb = random(3);
 itoa(filenumb+40,filenumber,10);

strcat(filename,filenumber);
strcat(filename, ".wav");

Serial.println(filename);

play(filename);
delay(1000);

}

else {
  delay(1000);
  }

}

Play it yourself

40.wav