Don't loose your mind and faith. Although that OpenOCD didn't work with LPClink but we could modified with low cost LPT Macgraigor(74HC or HCV that work with...
55241
Felipe de Andrade Nev...
fanl1234
Oct 2, 2011 3:52 pm
There is also the CoLinkEx, witch is hw open sourced and firmware distribuited, the flasher firmware run in a lpc1343. att. 2011/10/2 jeckson_sb...
55242
Jean-Sebastien Stoezel
jsstoezel
Oct 3, 2011 3:23 am
Hi: I would like to identify the pros and cons of using the ADC of an LPC17xx in burst vs interrupt mode. The end application I'm working on is a typical ...
55243
Phil Young
philyoung63
Oct 3, 2011 6:50 am
Hi Jean-Sebastien, Unfortunately this may be a bit more difficult than you imagine, it depends on whether you care about the relative sampling times of the...
55244
Phil Young
philyoung63
Oct 3, 2011 6:54 am
It's also worth pointing out that there is an excellent apps note from NCP regarding layout of the board for using the 12 bit ADC on the LPC17xx family. Look...
55245
David Smead
osavr
Oct 3, 2011 7:05 am
Have you considered a 1 channel burst mode that is triggered by a timer. Each timer interrupt, save the last channel and set burst mode on a new channel....
55246
Phil Young
philyoung63
Oct 3, 2011 7:54 am
1 channel is not a burst, in this case you would trigger a single conversion. I guess here you could use the isr to adjust a compare output from a timer and...
55247
David Smead
osavr
Oct 3, 2011 8:34 am
I didn't look at the user manual for the LPC17xx but have assumed the same ADC device is used in it as in the LPC2148, which I'm familiar with. In that...
55248
Phil Young
philyoung63
Oct 3, 2011 9:10 am
Hi David, Selecting 1 channel for burst mode simply means that this channel will continue converting, why would you want to do that if you were using an ISR to...
55249
Sutton Mehaffey
sutton@...
Oct 3, 2011 6:45 pm
I have put in a feature that takes an SD card with a .bin file on it, uploads the file to an intermediate serial flash, then uploads from serial flash to CPU...
55250
David Smead
osavr
Oct 3, 2011 7:00 pm
On the LPC2148, I operate in burst mode. I have a timer that is used for many different chores at different intervals. It interrupts 65,536 times a second...
55251
Jean-Sebastien Stoezel
jsstoezel
Oct 3, 2011 7:15 pm
Hi Phil: Thank you for the detailed reply. I had read one of your previous post in the archive, where you were describing this technique which consists of ...
55252
mjames_doveridge
mjames_dover...
Oct 3, 2011 7:41 pm
How do you handle the interrupt/restart vectors - when/where are they set up for the main code? I use a similar system on 2129 and 2738, works OK. I don't use...
55253
lucky_suhas
Oct 3, 2011 7:53 pm
Hi, i'm trying to transmit and receive using the I2C. using a NGX blueboard LPC2148. Using the I2C in master mode. What i wanted to try was read the data from...
55254
Sutton Mehaffey
sutton@...
Oct 3, 2011 9:02 pm
Martin, That might be the issue, but not sure. They are set up in the startup code and are mapped starting at 5010, which is the Reset_Handler, which is where...
55255
Sutton Mehaffey
sutton@...
Oct 3, 2011 9:09 pm
By the way, my boot code does call a function pointer as well to call the main app. However, since my boot code resides at 0, a watchdog timer restarts the...
55256
Phil Young
philyoung63
Oct 3, 2011 11:23 pm
Hi Jean, I haven't measured the time at the end of a burst as I perform bursts at a fixed rate and then perform DSP on the samples, to minimize phase delay ...
55257
Fernando Augusto
fernando_aug
Oct 6, 2011 6:58 pm
Hi everybody, I'm currently facing an issue on LPC2368 revision D. I have some projects that uses fast ethernet (100MBits) with no problem. Everything works...
55258
alexander_ribero
alexander_ri...
Oct 6, 2011 7:59 pm
Hi Fernando: From the Errata sheet for the LPC2368 "Note.2 On the LPC2368 Rev D, design changes to the Memory Accelerator Module were made to enhance timing...
55259
Sutton Mehaffey
sutton@...
Oct 6, 2011 8:54 pm
My SD card uploading new firmware is working great thanks to Martin. It wasn't an interrupt vector problem, but I found a bug in the startup file that was...
55260
Donald H
donhamilton2002
Oct 6, 2011 10:31 pm
The serial flash does not have FAT and the SD card does. For every block read from the SD card, two other blocks are also read. So, at least three blocks are...
55261
Donald H
donhamilton2002
Oct 6, 2011 10:41 pm
This is the best (yet simple) explanation of FAT: http://www.pjrc.com/tech/8051/ide/fat32.html...
55262
Sutton Mehaffey
sutton@...
Oct 6, 2011 11:06 pm
I don't follow what you did. Every time you read the file, you created some type of table that allowed you not to have all the overhead of finding all the...
55263
Michael Anton
mike_antonca
Oct 6, 2011 11:28 pm
If you read the entire cluster chain for the file once, then you know which clusters are being used, and the order. From then on it is a matter of grabbing...
55264
Sutton Mehaffey
sutton@...
Oct 6, 2011 11:37 pm
Got it and agreed. What that really means is that the best option is to write a separate routine that does it all instead of using the pieces I have. Not...
55265
Donald H
donhamilton2002
Oct 6, 2011 11:43 pm
... That may be easier said then done. The cluster chain may cross many FAT blocks. If you reformat the SD card every time, the FAT code on the PC will always...
55266
Michael Anton
mike_antonca
Oct 6, 2011 11:45 pm
This might be normally handled with an open file type of routine that keeps track of where you are in the current file. Then normally one would just keep...
55267
Sutton Mehaffey
sutton@...
Oct 7, 2011 1:14 am
I actually have stored the start cluster and number of bytes of the file prior to doing the reads. So, I'm not rereading the FAT table every time when I read...
55268
marcosriolo
Oct 7, 2011 2:01 am
someone tell me why when configured with GPIO INPUT keep current and voltage on the pin?...
55269
rtstofer
Oct 7, 2011 5:07 am
... Internal pull-up resistors. These keep the pin from floating around the switching threshold region. On some uC's (like the mid-range PICs), you can turn...
