Custom LPC1343 board

[lpcware]

Content originally posted in LPCWare by bobi-one on Fri Apr 08 13:10:36 MST 2011
Hi, my custom lpc1343 which I've designed ,just arived , and after the assembly i started testing it. Every thing like comunicating with lpc link and uploading examples like blinky was OK. After that i noticed that the same blinky project blinks a little faster than the separated lpc1343 lpcxpresso.

Now I am wondering if I've put not the wright quartz. I am using this 16MHz
http://home.comet.bg/datasheets/Quartz&ceramic%20resonators/XG(6x3.5).pdf
with two 18p Caps.
I don't have oscilloscope, and need a way to verify that my board is working like the original lpcxpresso.
Please don't judge me that I'm so MCU incompetent :)

[lpcware]

Content originally posted in LPCWare by larryvc on Mon Apr 11 08:38:15 MST 2011

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Quote: igorsk
But the beer [B]is[/B] holy water! Right? Right?..

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Yes my mistake, but the potential, from the perspective of the designer, is somewhere between +VCC, Ground , and an open circuit depending on how much of it you drink.

Some = +VCC
Some more = Ground
All of it = open circuit

[lpcware]

Content originally posted in LPCWare by igorsk on Mon Apr 11 03:10:22 MST 2011

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Quote: larryvc
By the way, that's not Holy Water, that's Beer.:D

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But the beer [B]is[/B] holy water! Right? Right?..

[lpcware]

Content originally posted in LPCWare by larryvc on Sun Apr 10 15:26:07 MST 2011
:DThat's great.  I do see a discrepancy in the modified circular-delta-ladder-network CAN bus terminator.  Did you get this from Zero?:D

I used to do my best design mods on paper napkins during my lunch break.  The technicians got tired of the food stains and wrinkles so they gave me an engineering pad.  They still had to deal with the food stains.:)

By the way, that's not Holy Water, that's Beer.:D

[lpcware]

Content originally posted in LPCWare by OXO on Sun Apr 10 13:24:38 MST 2011
Will this one do for you? ;)


[IMG]http://imgs.xkcd.com/comics/circuit_diagram.png[/IMG]

[lpcware]

Content originally posted in LPCWare by bobi-one on Sun Apr 10 02:27:32 MST 2011

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Quote: larryvc


Take a look at the second half of post #14 please.

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I've just find out about couple of mistakes in the design which I need to take care before sharing it all :D

[lpcware]

Content originally posted in LPCWare by larryvc on Sun Apr 10 00:37:39 MST 2011

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Quote: bobi-one
soon I'll post updated paint demo ,  it will be more clear what i was trying to paint :D

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The first picture looked like a birthday cake, the second picture looked like someone bending over to blow out the candles!:D

[lpcware]

Content originally posted in LPCWare by bobi-one on Sun Apr 10 00:29:12 MST 2011
soon I'll post updated paint demo ,  it will be more clear what i was trying to paint :D

[lpcware]

Content originally posted in LPCWare by larryvc on Sat Apr 09 23:27:17 MST 2011
I want to know what the second picture in this video is:;)

bobi-one is an artist take 10

[lpcware]

Content originally posted in LPCWare by Luis Digital on Sat Apr 09 20:15:26 MST 2011
http://http://www.youtube.com/watch?v=tW6P3xxuIMQ&NR=1Bobi-one gotcha: SURPRISE!:D

[lpcware]

Content originally posted in LPCWare by larryvc on Sat Apr 09 16:36:18 MST 2011

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Quote: Luis Digital
I thought for a moment that you had PCBs for Monday. :)

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Pair of glasses, spectacles, etc...:)

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Quote: bobi-one
If somebody is interested I can send you my board files

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I'm interested.  larryvcnxp at hotmail dot com or attach them here.

[lpcware]

Content originally posted in LPCWare by Luis Digital on Sat Apr 09 15:25:12 MST 2011

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Quote: larryvc
Thank you very much OXO.:o:D

Actually I have a pair on order, they will be ready for pickup on Monday.:)

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I thought for a moment that you had PCBs for Monday. :)

[lpcware]

Content originally posted in LPCWare by larryvc on Sat Apr 09 14:03:58 MST 2011

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Quote: Luis Digital
...
I like to see some photos of your PCBs, if possible,[B] [I]just to feed the eyes[/I][/B]. :)

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Maybe this is how Luis keeps his eyesight from failing.:)

It's the weekend again!

[lpcware]

Content originally posted in LPCWare by larryvc on Sat Apr 09 12:46:43 MST 2011

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Quote: OXO
You need new spectacles.. :D

It's an ADS7843 touch screen controller !

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Thank you very much OXO.:o:D

Actually I have a pair on order, they will be ready for pickup on Monday.:)

[lpcware]

Content originally posted in LPCWare by OXO on Sat Apr 09 12:40:38 MST 2011

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Quote: larryvc
That's not messy .. ugly, you are an artista bobi-one.:D

I could not quite make out the part number of the chip in the bottom right corner of the board.  What is it for? :confused:

Larry

p.s. I edited post # 3

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You need new spectacles.. :D

It's an ADS7843 touch screen controller !

[lpcware]

Content originally posted in LPCWare by larryvc on Sat Apr 09 11:28:38 MST 2011

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Quote: bobi-one
Here are some photos of my board,it's messy .. ugly wires and kapton, but is working fine :D

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That's not messy .. ugly, you are an artista bobi-one.:D

I could not quite make out the part number of the chip in the bottom right corner of the board.  What is it for? :confused:

Larry

[lpcware]

Content originally posted in LPCWare by bobi-one on Sat Apr 09 04:50:01 MST 2011
Here are some photos of my board,it's messy .. ugly wires and kapton, but is working fine :D, the extra pull down is for the SWO, I've soldered  this temporary solution till finding out why my touch screen controller doesn't work without it.
If somebody is interested I can send you my board files

[lpcware]

Content originally posted in LPCWare by Luis Digital on Fri Apr 08 15:31:24 MST 2011
@Zero, He is using an LPC1343, I just put the link above for reference.

@bobi-one, See also "system_LPC13xx.c" file to change some constants, such as: "__XTAL".

[lpcware]

Content originally posted in LPCWare by Ex-Zero on Fri Apr 08 15:22:11 MST 2011

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Quote: bobi-one
hmm, so what kind of change i need to do to my code in order to run with the speeds of the lpcxpresso( because i dont have another quartz at the moment)

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As far as I remember 3*16 is nearly the same as 4*12 :eek:

It's not forbidden to use another crystal :)

[lpcware]

Content originally posted in LPCWare by Luis Digital on Fri Apr 08 15:01:20 MST 2011
See:
[B]LPC1114 changing crystal frequencies

[/B]What about photos? :p

[lpcware]

Content originally posted in LPCWare by bobi-one on Fri Apr 08 14:28:26 MST 2011
hmm, so what kind of change i need to do to my code in order to run with the speeds of the lpcxpresso( because i dont have another quartz at the moment)