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C51: USING PHILIPS MX DEVICE WITH C51 / BL51


Information in this article applies to:

  • C51 Version 6 or higher

QUESTION

I need to program the Philips P89C669 which is an MX-based device. I know that this device uses an enhanced instruction set that requires the PK51 Professional Developers Kit. However, I need to start my project right away and I want to use the standard C51 Compiler and the BL51 Linker/Locater since currently I just need the regular 64KB address space.

My problem is that whenever I select the device, the µVision IDE requires the CX51 Compiler and the LX51 Linker/Locater. Is there a way to use the C51/BL51 combination?

ANSWER

Yes. You have to remove the MX directive from the Device Database. The setup is as described below:

  1. Open in the µVision menu File - Device Database and select the Philips MX device that you are going to use.
  2. Delete from the Options - CPU= configuration string the option MX and click Update.
  3. Now re-select this device under Project - Options - Device.

After this modification, µVision will just use the standard 8051 toolset for this device. It is no longer possible to use the enhanced features of the Philips MX device, since only standard 8051 CPU instructions and the 64KB address space is available to the user.

MORE INFORMATION

SEE ALSO

Last Reviewed: Thursday, January 18, 2007


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