Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail
From: Martin Brown <'''newspam'''@nonad.co.uk>
Newsgroups: sci.electronics.design
Subject: Re: Microcontroller (AVR) programming from smartphone
Date: Wed, 27 Mar 2024 13:58:33 +0000
Organization: A noiseless patient Spider
Lines: 41
Message-ID: <uu18ma$2sh97$1@dont-email.me>
References: <f3de3f8fc37a3347899d8d66b21c48e6@www.novabbs.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Injection-Date: Wed, 27 Mar 2024 13:58:34 +0100 (CET)
Injection-Info: dont-email.me; posting-host="1a7f4da4cd9eb8c1e2407fe53a498913";
	logging-data="3032359"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX18vAJJQjpKa9MCYAS40iCsCTkEpf09jqixhnru8Izktpw=="
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:3Mif8HQ6vEkVylQxzi0S+IqoMx4=
In-Reply-To: <f3de3f8fc37a3347899d8d66b21c48e6@www.novabbs.com>
Content-Language: en-GB
Bytes: 2888

On 27/03/2024 05:10, RodionGork wrote:
> Hi Friends!
> 
> Briefly: considering ways of uploading code to microcontroller 
> (particularly some Atmel's AtMega - same as used for Arduino) from the 
> smartphone.
> 
> In details:
> 
> Programming MCUs (e.g. uploading firmware into their ROM) usually 
> happens via
> some proprietary interface (using SPI in case of AVR), or UART, or JTAG. 
> This generally involves dedicated software on the side of computer and 
> some hardware (USB to UART or dedicated "serial programmer").
> 
> Suppose we want to be able to write simple code using mobile phone - 
> situation I met with my class of 15+ students with no dedicated lab 
> having 15+ computers.
> 
> I tried creating a small system containing two parts: First - html 
> web-page with a textarea to write assembly code, built-in AVRA assembly 
> compiler (just compiled to javascript) - and some JS code which can 
> "beep" the bits of the hex-file containing firmware (via audio). Second 
> - bootloader for target MCU which uses ADC pin to "listen" to those 
> beeps via direct wire connected to 3.5 mm audio jack plugged into 
> smartphone - and "burn" incoming data into flash memory.
> 
> This works (if you are curious to try, it could be found in my github 
> page by same username) - however there is a sudden issue: almost half of 
> students use mobile phones without 3.5mm jack - as nowadays it is the 
> era of wireless headphones already, I missed the fact!
> 
> So now I'm looking for further, alternative approaches. For example:

How about canibalising a cheap bluetooth earbud or pairing the phone by 
Bluetooth for audio with some other cheap and nasty peripheral. Plenty 
of not quite supported any more "smart" speakers knocking around.

-- 
Martin Brown