[SOLVED] [Moved] LPC2148 was not reset? [URGENT]

[amayilsamy]

I'm using LPC2148.

Its not reset. And I also checked the crystal Pins CRO There was no signal.

How to I check it Controller is good?


Kindly help . Its most urgent....

 

[mathespbe]

Re: LPC2148 was not reset? [URGENT]

First check your Reset circuit.

 

[bigdogguru]

Observing the signal from a crystal typically requires an active MOSFET scope probe.

Using a standard probe can easily cease oscillation of a crystal or at the very least dramatically change its characteristics and frequency.

Are you able to establish communications with the device using ISP or JTAG?


BigDog

 

[amayilsamy]

I'm using ISP mode . I checked with standard probs there was no signal

 

[bigdogguru]

You typically won't get a signal from the crystal with standard probes.

So can you establish communications with the device using ISP?

Also is this a development board?

If so, what is the manufacture and model?


BigDog

 

[amayilsamy]

It is my own development board .

I already programmed and executed using this board. On that time it was good. I programmed more or less 10 times.

But now it was not working. I can't find what is the problem.

 

[bigdogguru]

What software are you using for ISP, FlashMagic ?

What type of error message you are receiving during program phase?

Have you tried erasing the entire device, before programming it?

You might find the following of interest, it's a bit dated, however much of the info applies to the LPC2148.

Appnote 4: What to do if ISP does not work

Appnote 1: ISP entry using COM port handshaking signals


BigDog

 

[amayilsamy]

Here I posted error message during program time.

And also I try to erase the controller same error occurring.

 

[bigdogguru]

Crystals typically do not fail without some physical damage.

What is the crystal frequency?

The baud rate you are using is too high or too low

The baud rates that can be used to communicate with the bootloader vary depending on the frequency of the oscillator being used. It is recommended to use at least 10MHz and 9600 baud. Try different baud rates. However the bootloader will only attempt to autobaud once after a reset so be sure to reset it between attempts.

What are you using to power the development board? Is the power supply well regulated?

Can you post a schematic of your board?

Do you have pin 51 connected to Vcc (3.3v)

FlashMagic has entire page dedicated to AutoBaud Fail error message:

Failed to AutoBaud


BigDog

 

[amayilsamy]

I tried to increase and decrease baud rate , again the same error occur.

I think controller was gone out. So I changed the controller in same board.

It was working good.

I don't know. Why the previous controller was not working.

 

[amayilsamy]

The previous controller is gone out... That is the problem