Serial1.setup(9600...) hangs on STM32 VL Discovery

[espruino-discuss]

Posted at 2017-07-13 by fobus

Hello,

When I try to setup a serial port this board hangs with espruino. I have two boards which has the same problem.

I have used this commands

Serial1.setup(9600,{rx:B7,tx:B6});
Serial2.setup(9600,{rx:B7,tx:B6});
Serial3.setup(9600);
Serial2.setup(9600);
etc...

all those commands hangs the board, board doesn't response any more. I have tried those binaries

espruino_1v80_stm32vldiscovery.bin
espruino_1v91_stm32vldiscovery.bin
espruino_1v92_stm32vldiscovery.bin
espruino_1v93_stm32vldiscovery.bin

Am I doing some thing wrong?

[espruino-discuss]

Posted at 2017-07-14 by @gfwilliams

On the VL board you're communicating via Serial1 on pins A9/A10 to get a Serial console. Is it possible that when you call Serial1.setup(9600,{rx:B7,tx:B6}); you're just moving the serial port to another place, which means you no longer get a response?

What if you type setInterval("LED.toggle",500) beforehand - so an LED will flash on and off. Does it keep flashing after you issue the command?

---

Posted at 2017-07-14 by fobus

Hello Gordon, thank you for your response.

I think this problem is not about Serialx, I tried your code.

setInterval("LED.toggle",500)
//device failed here

this command hangs too. device doesn't response after this command and led is not flashing.

One more issue;
If I type an undefined function or variable, it also hangs like this :

gogogo
Uncaught ReferenceError: "gogogo" is not defined
Execution Interrupted
//device failed here

board doesn't response after this command too.

here is some output that works well and hangs at the end.

_____                 _
|   __|___ ___ ___ _ _|_|___ ___
|   __|_ -| . |  _| | | |   | . |
|_____|___|  _|_| |___|_|_|_|___|
          |_| http://espruino.com
 1v91 Copyright 2016 G.Williams
Espruino is Open Source. Our work is supported
only by sales of official boards and donations:
http://espruino.com/Donate
>console.log('Merhaba')
Merhaba
=undefined
>1+1
=2
>x=function() { console.log("Merhaba")}
=function () { ... }
>x()
//device failed when I call x() but all the others worked good until this one.

---

Posted at 2017-07-18 by @gfwilliams

Ok, thanks - I'll need to look into this. It's possible that over time the amount of free stack available in the VL image has dropped to the point where it's not really usable.

---

Posted at 2017-07-20 by fobus

Thank you for your response Gordon.

I will change my board.

---

Posted at 2017-07-24 by @gfwilliams

Yes, it's probably the best bet I'm afraid. The VL doesn't have much free memory with Espruino on it, so is quite limited