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Oh boy ... living and learning.
Thanks a lot for the reply, I will try FLIP (didn't even know it existed).
Again, thank you so much.

Cheers,
Marcelo.

Hi Andy,

Confirmed!
I got home and did a test using the terminal (attached .JPG). The chip doesn't reply with a dot to that command.
I have tested on the terminal and also using PuTTY. A bug on the Atmel boot loader?

Is there an option to disable the sending of the XTAL command on FlashMagic?

Not sure if it is ultimately necessary as I am able to configure the chip manually.

Thanks,
Marcelo.

Hi Andy,

Thanks for the prompt response. I will do some more testing once I get home later today.
But before that, a couple things just popped into my mind.
I am using the Atmel 89C51RC2, and on its datasheet there's no reference to the 02 command (or the 01 for that matter). However I see those commands on the datasheet of the 80C51RC2 from Philips.
Can this be the problem? Maybe the Atmel variant silently ignore the command?
I have LEDs on my RS232->TTL adapter and I remember all the comands I typed other than the full chip erase came back immediately. Which also happens when I press start.
Even when I was using the oscilloscope to track the TX/RX and troubleshoot the physical connections I could see that the replies where pratically immediate, definitely not longer than 4 sec. Not even 1 Sec.
What is this XTAL set command used for? Is it relevant for the Atmel once it has already done the autobaud?
Maybe it is valuable for some timing, but I was able to program the device manually line by line using the terminal.

Please let me know if this new information would ring a bell.

Cheers,
Marcelo.

Here it is ...

The first one I took when pressing "Start" and trying to write a .hex file.
The second one I took when going to the ISP menu and selecting Erase Flash.

The Capture.jpg file shows the error I got.
The Capture2.jpg file shows how the program is configured.

The chip I am trying to configure is a 89C51RC2-IM.
I have tried with the high speed option on (both 6 and 12 clock) and off, same results.
I have tried with different speeds, same results.

I am able to program the chip using the terminal option, pasting the commands manually from a text file.
That method works fine.

I hope this helps find a solution. I hope it is me doing something stupid here.


Thanks a lot,
Marcelo.

Hello everyone,

I have connected a 89C51RC2 via serial (using a PL2303 USB-Serial adapter) going thru a MAX232 to my laptop.
The MCU is running on a 12Mhz Xtal and seems to be working fine. I have connected it with EA up, PSEN down and tried with ALE both up and disconnected. The "circuit" is just the chip on a protoboard with the XTAL and reset circuit (RC) in place.
I have configured the serial port to 9600 8N1 and opened Putty ... then I type "U" and get "U" back, meaning the MCU bootloader discovered the speed and replied.
Then I open the FlashMagic's terminal and do the same thing ... reset the circuit and type "U", getting a "U" back.
In fact from that moment on I get back anything I type, echoed back by the MCU.
However, when I command FlashMagic to start writing (or anything else) I see both TX and RX blink once (checked on the oscilloscope to make sure the MCU was sending something back) then I get a message stating that it was unabe to communicate and suggesting me to either lower or increase the speed.
I have read the post regarding speed autodiscover and tried almost everything there. I just didn't try replacing the USB adapter as I am getting a response back both thru putty and flashmagic's terminal.
At this point I don't know what else I could do.
I have tried programming the device on a Willem compatible (GQ-4X) programmer but it doesn't seem to be supported.

Any insight on this would be much appreciated.

Thanks everyone for even reading up to this point.

Best regards,
Marcelo "Mockba" Dantas.