topic Re: Release Build Rarely Boots in LPC Microcontrollers

Release Build Rarely Boots

lpcware — Wed, 15 Jun 2016 18:47:13 GMT

Content originally posted in LPCWare by Randy Nuss on Thu Jun 20 21:37:06 MST 2013

I have a LPC4337-based project. Debug builds always run from a power-on-reset. However, a release build may only boot about 30% of the time, i.e. there is no evidence the code begins to run. Something else, that may be telling, is I have run release builds in the debugger and I get a hard-fault exception when a read of an address within the EEPROM area is attempted -this never occurs when debugging a debug version.

I believe all project properties are the same for both builds.

Re: Release Build Rarely Boots

lpcware — Wed, 15 Jun 2016 18:47:14 GMT

Content originally posted in LPCWare by suckfish on Thu Jun 20 23:39:21 MST 2013

The first two things I'd check:

<ul>
<li>Make sure you wait as appropriate for any config to take effect. There aren't many things that need that. An non-debug build will be faster and more likely to trip over any problems here.</li>
<li>Make sure you use volatile accesses (or memory barriers) for all config registers. A debug build has less optimisation meaning that you're more likely to get away with a missing volatile.</li>
</ul>

Since you mention to fault access the EEPROM that's the obvious code to look at first.