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RE: Victoria's secret: A nervous Elf can lose his head

dougw — Fri, 21 Oct 2022 13:51:19 GMT

Cool comical elf.

RE: A QT Py Christmas - add Sound

sobellinni — Mon, 18 Jul 2022 23:24:22 GMT

/*
I made my own sound driver because the one in this blog does not work

this sketch will play random files labeled with

numbers */

#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);

}

RE: A QT Py Christmas - Failed to play audio from external Flash memory

sobellinni — Tue, 04 May 2021 19:03:43 GMT

I tried for weeks to get any of the audio libraries for playing flash to work , so I finally wrote my own app

this works

#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

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;

// 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, 1000); // 48000000/8000 = 6000

zerotimer.setCallback(true, TC_CALLBACK_CC_CHANNEL0, TimerCallback0);

zerotimer.enable(true);

}

void loop() {

play("0.wav");

delay(1000);

play("1.wav");

delay(1000);

play("2.wav");

delay(1000);

play("3.wav");

delay(1000);

play("4.wav");

delay(1000);

play("5.wav");

delay(1000);

}

RE: Musical Card With Gyro Control LED's

seharfatima — Mon, 01 Feb 2021 18:08:19 GMT

Nice and innovative project with good use of gyro sensor in greeting card .I will apply this concept in my future projects.

And all the best for the contest results(•‿•)

RE: Holiday Special 20: The Learning Stone

cstanton — Mon, 25 Jan 2021 11:03:30 GMT

Grogu <3

RE: Dog Shaped Arduinos. What could go wrong?

hugohu — Fri, 22 Jan 2021 04:00:54 GMT

[View:https://players.brightcove.net/1362235890001/NkxiVJdjx_default/index.html?videoId=6225110940001:740:466]

Demo of corgi blinky, basically on for 6 seconds off for 0.3, says woof bark bark in serial console, etc

RE: Musical Card With Gyro Control LED's

shabaz — Thu, 21 Jan 2021 21:46:30 GMT

Hi Harji,

Interesting and well-documented project! It was interesting to see your results with the sound recorder board - I'll have to order some of those sometime to experiment with them : )

Incidentally, the white board you're using, doesn't it generate a lot of static electricity? It looks like 'expanded polystyrene'. If it does, be careful when you remove the electronics, in case it damages the Arduino.

RE: Holiday Special 20: The Learning Stone

shabaz — Thu, 21 Jan 2021 21:35:49 GMT

Hi John,

Nice reuse of a tablet with the Pi! And very cool that it can show the younglings that these computing devices have a lot of uses!

RE: Victoria's secret: A nervous Elf can lose his head

shabaz — Thu, 21 Jan 2021 20:23:31 GMT

Hi Gary,

I'm speechless, that is a cool elf. Was not expecting the head flying off!

RE: Dog Shaped Arduinos. What could go wrong?

shabaz — Thu, 21 Jan 2021 20:19:50 GMT

Hi Hugo,

I think you could sell these with some refinement, it looks really good!

Incidentally some of the smaller USB sockets are easy to hand-solder, if you ever wanted to shrink down to those. There are (for example) micro-USB sockets with through-hole pegs to hold then in the right place, so they don't move around while soldering the surface-mount pins.

You should upload a video of the working board showing the blinking LED. From the larger photos, in close-up the soldering quality looks totally fine for prototypes. It's unfortunate that two boards don't work but it's common to have a high number of failures until you've refined your processes. I still have large numbers of failures too, especially when I try to do something new like use a different reflow method or very unusual SMD package and so on.

I tried soldering a BGA-like radio module, it was pricey (about $20 each) and one in five initially worked : (

RE: Reach Out And Touch The World

shabaz — Thu, 21 Jan 2021 19:52:28 GMT

Hi Doug,

Great project : ) Very unique mixing such an engine with a spinner toy! The effect is very cool.

RE: The Christmas Forest

shabaz — Thu, 21 Jan 2021 19:38:56 GMT

Hi Frank,

For a minute I thought it was made from PCB but your 3D printer idea is much better.. safer, no sharp fibreglass points.

I can imagine your granddaughter had fun decorating the tree with the stickers too. The end result is really nice!

RE: A QT Py Christmas - add Cap Sense Buttons

shabaz — Thu, 21 Jan 2021 19:29:24 GMT

Hi Ralph,

Great idea to use thumb tacks (or drawing pins as they are called here) as touch sensing plates : )

RE: Dog Shaped Arduinos. What could go wrong?

DAB — Fri, 15 Jan 2021 20:36:29 GMT

Nice project.

DAB

RE: Dog Shaped Arduinos. What could go wrong?

hugohu — Fri, 15 Jan 2021 18:43:00 GMT

I would like to mention I am exceptionally pissed at the CH340 for changing from wchserial1430 to random wchserial[random 2 digit number].

Ugh.