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Messages - Lorenzo

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P89V51Rx2/P89LV51Rx2 / Re: Two different bootloaders v7
« on: March 15, 2011, 12:40:00 am »
Draw your own conclusions; I personally am disgusted.

I'm with you.  P89V51 is already a mess: it was claimed to be 100% compatible with its predecessor when the programming pin could no longer be used.  This issue is just another turn of the screw.  It seems to me that they are like a bull in a china shop: every time they change something, instead of improving, they play merry hell with the specifications.  How much would have cost to increase the version number to v8?  Now we have two different bootloaders with the same reported version number.  Great!

How do you suggest to distinguish between the two versions?  Maybe we could read a specific byte from the bootloader area?  Or we may call command 0C or 04 and check the content of some register (e.g., register A).

P89V51Rx2/P89LV51Rx2 / Two different bootloaders v7
« on: January 11, 2011, 05:31:18 am »
I found out today that some NXP P89V51RD2 chips runs a bootloader v7 which differs from that available on FlashMagic site (see also this sticky post).  Can someone confirm?

I used to upgrade the bootloader of P89V51RD2 MCUs from v6 to v7 from within my firmware because the v7 includes an important feature to me which lets me change the way programming mode can be activated.  The upgrade is carried out automatically after checking the bootloader version returned by the provided bootloader function.  The NXP chips mentioned above returns "7" as factory bootloader and the upgrade does not take place.

I believe the only way I have to get around this is to perform a CRC check on bank #1.  Any better suggestion?

When using the feature ISP -> Start Bootloader... with FlashMagic 5.36.1792, option Baud Rate has no effect on the command being sent.  The baud rate actually used is that of the programming function in the main window.  You can check it with a serial port monitor (i.e. PortMon).

Feature Requests / List of previous hex files
« on: January 23, 2007, 11:37:32 pm »
Hi there,

I would like to see a list of 5-10 items (e.g., a dropdown box for "Hex File:" field?) from which you can choose an hex file previously uploaded.

Please, do not be too stingy with path lenght: many times, it is the same file but in differenct directories.  ;)

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