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ATtiny1614 hello buzzer board

Motivation

For more fun to hello board beyond simple stuff like LED, switch and serial echoing.

At Fablab kannai inventory, we have electromagnetic buzzer(SDC1614L5-01) and I try to use that to AVR 1 series hello board.

Experiment

Before milling PCB, I checked the behavior of electromagnetic buzzer by ATtiny3216 breakout board and breadboard. This certainly make sounds though tone generation was not stable.

Schematic

FA2020_w06_echoboard1614.sch schematics

Board

FA2020_w06_echoboard1614.brd board

Note

Used different library for buzzer SG1(BMT1205XH7.5) is not the right parts - SDC1614L5-01. For the future electronics design, see TBD section.

Warning

Error of stop mask was raise by DRC. I could not figure out how to solve that and just ignored.

Production on 5 March 2021.

Code

hello.t1614.echo.buzzer.ino pitches.h

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#include "pitches.h"

const int PA4 = 0;
const int PA5 = 1;
const int PA7 = 3;

int sw = 1;

int melody[] = {
  NOTE_C3,NOTE_D3,NOTE_E3,NOTE_F3,NOTE_E3,NOTE_D3,NOTE_C3,
  NOTE_E3,NOTE_F3,NOTE_G3,NOTE_A3,NOTE_G3,NOTE_F3,NOTE_E3,
  NOTE_C3,NOTE_C3,NOTE_C3,NOTE_C3,
  NOTE_C3,NOTE_D3,NOTE_E3,NOTE_F3,NOTE_E3,NOTE_D3,NOTE_C3
};

int len = 180;

int duration[] = {
  len,len,len,len,len,len,len*2,
  len,len,len,len,len,len,len*2,
  len*2,len*2,len*2,len*2,   
  len,len,len,len,len,len,len*2
};

int count = 0;

void setup() {
   Serial.begin(115200);
   pinMode(PA4, INPUT);
   pinMode(PA7, OUTPUT);
}


void loop() {
  sw = digitalRead(PA4);
  if (sw < 1 ){
    digitalWrite(PA7, HIGH);

    tone(PA5, melody[count], duration[count]);
    delay(duration[count] * 1.30);
    noTone(PA5);
    count = count + 1;
    if ( count > 24 ) {
      count = 0;
    }
  }
  noTone(PA5);
  digitalWrite(PA7, LOW);
  delay(200);
}

For adding pitches.h file to the code(.ino) on Arduino IDE,

  • click triangle under serial monitor mark in Arduino IDE > “New tab”
  • Input the name - “pitches.h”
  • At “pithces.h” tab, paste the code of pitches.h

Ref. Play a Melody using the tone() function

Write program

Used pyupdi. We may upload program directly from Arduino IDE. See TBD(#tbd).

Setup Arduino IDE board manager and build path for build .hex files

See build .hex fro .ino, 2020

After configuring Arduino IDE, click “check” button on Arduino code editor. Then you can see .hex file at your build path on your machine.

Setup pyupdi

On your terminal (Mac terminal, Windows gitbash or powershell), make python virtual environment and activate that. Python virtual environment helps to solve library dependencies and path for commandline. 

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# make python virtual environment.
$ cd
$ pytyhon3 -m venv env1

# Activate virtual environment. 
$ source ~/env1/bin/activate

# when your are using powershell, `env1/Scripts/activate`

# Install pyupdi on virtual environment
(env1)$ pip install https://github.com/mraardvark/pyupdi/archive/master.zip

Run pyupdi

If you are not on python virtual environment, 

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$ source ~/env1/bin/activate

## After activate virtual environment, terminal shows like: 
(env1) $

Connecting UPDI interface to target board from programmer board (over FTDI), write .hex file via pyupdi. 

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(env1)$ cd <your build path>
(env1)$ pyupdi -d tiny1614 -c /dev/tty.usbserial-D307RG9Y -b 57600 -f hello.t1614.echo.buzzer.ino.hex

If puypdi works, terminal output shows like: 

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Device info: {'family': 'tinyAVR', 'nvm': 'P:0', 'ocd': 'D:0', 'osc': '3', 'device_id': '1E9422', 'device_rev': '0.0'}
Programming successful

BoM

Part Value Device Package Description BUILT_BY MEMO
C1 1uF CAP_UNPOLARIZEDFAB C1206FAB
R1 1k R1206FAB R1206FAB Resistor (US Symbol)
R2 10k R1206FAB R1206FAB Resistor (US Symbol)
S1 SW_SWITCH_TACTILE_6MM6MM_SWITCH 6MM_SWITCH OMRON SWITCH
SG1 SDC1614L5-01 SDC1614L5-01 SDC1614L5-01 MAGNETIC TRANSDUCER BMT1205XH7.5 on above board image is “BMT1205XH7.5”. See TBD(#tbd)
U$1 CONN_06_FTDI-SMD-HEADER CONN_06_FTDI-SMD-HEADER 1X06SMD
U$3 LEDFAB1206 LEDFAB1206 LED1206FAB LED
U$4 UPDI_3POS_SMD_SHAPE UPDI_3POS_SMD_SHAPE 1X03SMD
U1 ATTINY-SSFR ATTINY1614-SSFR SOIC14_SL EMA_Molly Copyright (C) 2018 Accelerated Designs. All rights reserved

TBD

  • To change size of buzzer foot print : Actual footprint width between two leges for buzzer(SDC1614L5-01) is 5.7mm than EAGLE library parts that I used above(7.2mm). We should shorten the width between the holes for buzzer foot.
  • To use 6 pin angle header with support part on EAGLE board : (EAGLE lbr file for SDC1614L5-01 that Tamiya-san made would help to check size of board outline.
  • To solve “Error of stop mask by DRC” : Maybe the problem of selected library? When I used (ATtiny1614.lbr)[http://academany.fabcloud.io/fabacademy/2021/labs/kannai/site/instruction/tips/eagle_lib/ATtiny1614.lbr], I did not see that error.
  • To use internal pullup on ATtiny1614 for switch : ATtiny1614 has internal pullup and we may use that instead of adding pullup resister.
  • To upload program directly from ArduinoIDE : On 5 March 2021 local session at Fablab Kannai, we could not uplaod using megaTinyCore Board Manager(ver2.2.5 or later) and could write program by pyupdi.

Files

Eagle

Source files

Reference

Last update: April 12, 2021