|
|
| Author |
Message |
sturgessb
Joined: 25 Apr 2008
Posts: 246
Location: Norwich, UK
|
|
Posted: 20 March 2009, 11:46 AM Post subject: 24n That wont respond to com |
 |
|
Hi Guys
I have a 24n that just doesn't want to re-program, all I get is 'failed to respond on com1'. It is still running its existing code fine, but just wont flash.
Any ideas?
It does respond to a reset. But when i try to identify device, it comes back as unknown. Is this stopping it flashing?
Thanks
Ben |
|
| Back to top |
|
 |
dkinzer
Site Admin
Joined: 03 Sep 2005
Posts: 2499
Location: Portland, OR
|
|
Posted: 20 March 2009, 13:55 PM Post subject: Re: 24n That wont respond to com |
|
|
| sturgessb wrote: | It is still running its existing code fine, but just wont flash.
|
The message that you cited generally means the device responded to the ATN signal but didn't respond to a command. That means that the device's transmit circuit is functioning properly but its receive circuit is not. This could be because of a component failure on the ZX itself or a problem in the connections to it. |
|
| Back to top |
|
|
sturgessb
Joined: 25 Apr 2008
Posts: 246
Location: Norwich, UK
|
|
Posted: 20 March 2009, 17:37 PM Post subject: |
|
|
Its not the connection as I've just replaced it with another and its fine. It must just be dead.
No matter. |
|
| Back to top |
|
|
sturgessb
Joined: 25 Apr 2008
Posts: 246
Location: Norwich, UK
|
|
| Back to top |
|
|
dkinzer
Site Admin
Joined: 03 Sep 2005
Posts: 2499
Location: Portland, OR
|
|
Posted: 26 March 2009, 23:07 PM Post subject: |
|
|
| sturgessb wrote: | | I have an old zx24 can i switch the ICs over? |
It looks like it might have been fried. All of the parts that we've ever used for U3 are compatible with one another so they could be swapped if you have the skills and equipment to do so. |
|
| Back to top |
|
|
sturgessb
Joined: 25 Apr 2008
Posts: 246
Location: Norwich, UK
|
|
Posted: 26 March 2009, 23:59 PM Post subject: |
|
|
switched it over but still no joy, never mind, was worth a shot.
Just ordered another. Can this go out today, im pretty desperate for it. Cheers
Ben |
|
| Back to top |
|
|
dkinzer
Site Admin
Joined: 03 Sep 2005
Posts: 2499
Location: Portland, OR
|
|
Posted: 27 March 2009, 0:47 AM Post subject: |
|
|
| sturgessb wrote: | | Can this go out today, im pretty desperate for it. |
Sorry, it was too late for the DHL pickup for today. It will go out tomorrow. |
|
| Back to top |
|
|
sturgessb
Joined: 25 Apr 2008
Posts: 246
Location: Norwich, UK
|
|
Posted: 27 March 2009, 0:54 AM Post subject: |
|
|
| no worries, thanks Don |
|
| Back to top |
|
|
spamiam
Joined: 13 Nov 2005
Posts: 666
|
|
Posted: 28 March 2009, 21:21 PM Post subject: |
|
|
| sturgessb wrote: | switched it over but still no joy, never mind, was worth a shot.
Just ordered another. Can this go out today, im pretty desperate for it. Cheers
Ben |
Hmm, I wonder why the replacement chip doesn't work? Did it get fried too? When you get your new ZX be VERY VERY careful about hooking it up. Is there something wrong with the signal you are sending to the ZX that is killing the chips?
-Tony |
|
| Back to top |
|
|
Don_Kirby
Joined: 15 Oct 2006
Posts: 329
Location: Long Island, New York
|
|
Posted: 04 April 2009, 0:37 AM Post subject: |
|
|
I have the same issue here. I believe mine suffered from either a static discharge spike, or alternatively, I've exceeded the write cycle limit of the flash. I have been using this particular chip for a year or so, and I'm not shy when it comes to uploading new programs. On the other hand, I'm leaning towards the static discharge. My own lackadaisical version control system doesn't even come close to accounting for the number of program cycle necessary to wear out the chip.
-Don |
|
| Back to top |
|
|
dkinzer
Site Admin
Joined: 03 Sep 2005
Posts: 2499
Location: Portland, OR
|
|
Posted: 04 April 2009, 1:09 AM Post subject: |
|
|
| Don_Kirby wrote: | | [...]I've exceeded the write cycle limit of the flash. |
Possible, but unlikely I think. The write cycle limit of the external EEPROM is a million cycles and 100,000 for internal Flash. If you downloaded 200 times a day it would take 16 months to exceed 100,000 cycles.
In any event, we're happy to send you a replacement. |
|
| Back to top |
|
|
Don_Kirby
Joined: 15 Oct 2006
Posts: 329
Location: Long Island, New York
|
|
Posted: 01 October 2011, 0:22 AM Post subject: |
|
|
I happened to be digging through a parts bin today and came upon the dead ZX24n I had mentioned in this thread. It still won't respond to a program load, although it does run the existing code just fine.
I've ordered a replacement for a new project I am working on and was wondering if Elba Corp would like to have the damaged one back for a post mortem?
-Don |
|
| Back to top |
|
|
dkinzer
Site Admin
Joined: 03 Sep 2005
Posts: 2499
Location: Portland, OR
|
|
Posted: 01 October 2011, 2:02 AM Post subject: |
|
|
| Don_Kirby wrote: | | [I] was wondering if Elba Corp would like to have the damaged one back for a post mortem? |
Sure, we can take a look at it. Often, re-flashing the bootloader will revive it. If you agree, we can hold your order and ship it after we've received the non-functional one and examined it. |
|
| Back to top |
|
|
Don_Kirby
Joined: 15 Oct 2006
Posts: 329
Location: Long Island, New York
|
|
Posted: 01 October 2011, 2:22 AM Post subject: |
|
|
No need to hold the order, but thank you for the offer. It's been a fine testbed, and owes me nothing.
If the damaged unit can be revived, perhaps it could be donated to some worthy cause..
Don |
|
| Back to top |
|
|
|
ZBasic Home
Forum Rules
Memberlist
Usergroups
RSS Feed
Site Search
Links
Download
Digests and Subscriptions
Profile
Log in to check your private messages
Log in
Register