No response after function on STM32vldiscovery

[espruino-discuss3]

Posted at 2015-05-05 by user54766

Hello, I have just begun my time with espruino and I have unsurprisingly run into an issue. I can connect to the board and perform all the simple commands and type in functions. However when I try and run the function, such as toggle() on the quick-start page, the webIDE and CoolTerm for mac just stop. I cannot press return or anything I have to press reset to get it back to normal. I have used the stlink utility twice to reprogram the board with no success. As a side note on this second reprogramming, when I press reset the espruino ascii art does not show up, and any functions I have saved are still on the chip.

-Thanks

[espruino-discuss3]

Posted at 2015-05-05 by DrAzzy

What code is hanging it?

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Posted at 2015-05-05 by user54766

function toggle() {
on = !on;
digitalWrite(LED1, on);
digitalWrite(LED2, !on);
}

then after when I run toggle() it gets hung up.

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Posted at 2015-05-05 by @gfwilliams

As a side note on this second reprogramming, when I press reset the espruino ascii art does not show up, and any functions I have saved are still on the chip.

There's some text at the bottom of the Other boards page:

Please Note: If you have saved code to Espruino, when booting it will load your saved JavaScript program from flash memory. Occasionally we change the way programs are stored in memory between versions in order to make Espruino more efficient, and when this happens, after flashing the latest version of Espruino to the device, it may stop booting....

I'd imagine this is likely to be your problem (if you updated from an older firmware?). There's some info on fixing it there - the bootloader on the proper Espruino boards makes sure it clears out saved code so this doesn't happen.

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Posted at 2015-05-06 by user54766

Thanks for your help, I had to load a previous bin file 1v55 to be exact. Now everything works.

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Posted at 2015-05-06 by @gfwilliams

Could you not just erase all flash memory when programming the board? That usually fixes the problem and lets you use the new firmware.

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Posted at 2015-05-06 by user54766

So I have been using ST-LINK utility and I preformed a full chip erase, then loaded the newest firmware. Unfortunately after programming the toggle() function it still gets hung up. Thanks for the suggestions.

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Posted at 2015-05-06 by @gfwilliams

Ok, thanks. Good to know - and that 1v55 works (although it's a bit old now)