--- crowd-funded eco-conscious hardware: https://www.crowdsupply.com/eoma68
On Fri, Jan 15, 2016 at 2:02 PM, Paul Boddie paul@boddie.org.uk wrote:
On Friday 15. January 2016 14.26.41 Luke Kenneth Casson Leighton wrote:
naturally it took a whole lot of shouting at digikey to get them to do a full audit of the stock of ACT8600-QJ601-T PMICs, but i've placed an order for replacements - to be sent directly to me - and will be putting those on when they arrive. also, only 1 out of the 6 PCBs happened to _not_ have solder-bridges under the DDR3 RAM ICs, so i've ordered some replacement DDR3 RAM and will be having a go at putting on 78-pin BGAs with the IRDA solder station. it'll be fun to try. ok.... correction: it'll be fun to succeed.
So, was it Digikey that mixed up the parts or the factory that put the wrong IC on the board?
digikey. they just sent - a second time - the exact same wrong part, after i specifically advised them on the process by which they could verify what the part was.
As for the RAM, I guess that it made for the "bring up" process, as described in that bare-metal Ingenic work, to be slightly more exciting than it should have been.
yyyyeah.... but luckily there's debug information printed in the u-boot SPL section that allowed a diagnosis.
When you're probably only somewhat confident that the code will do the trick, I guess it's frustrating to have defective hardware involved as well.
it's why the "reduce it to one and only one change" is so absolutely critical.
Anyway, good luck with the printing and soldering!
thanks... :)
l.