[RX850Pro] Others

What processing is required before initializing a real-time OS (RX850 Pro) at reset?

The following processing is necessary at reset.

• Setting CPU clock (such as setting PLL)
• Setting registers tp, gp, and ep
• Jump to RX850 Pro initialization processing (__rx_start)

During the RX850 Pro initialization processing, system memories (SPOL0, SPOL1, UPOL0, and UPOL1) defined in the system configuration file are manipulated. If these sections exist in an external memory, the memory controller must also be initialized.

Copying of data with an initial value from ROM to RAM and initialization of hardware must be executed at reset, or by using an initialization handler.

A real-time OS (RX850 Pro) cannot be used with the PM+ Ver.6.00.

The versions earlier than the RX850 Pro Ver.3.15 only support up to the PM+ Ver.5.21, and cannot be registered with the PM+ Ver.6.00 or later.

However, building can be executed as follows, even with the PM+ Ver.6.00 or later.

(1) Changing path Specify the following two paths as the "RX850 Pro installation directory" from the menu bar of PM+.

• Path to RX850 Pro library
  Select [Linker Options...] from the [Tools] menu and then specify a path to the library.
• Path to RX850 Pro include file
  Select [Compiler Options...] from the [Tools] menu and then specify a path to the include file.

(2) Creating information file to be output by CF850 Pro Create an information file to be output by the CF850 pro, in either of the following ways.

• Executing CF850 Pro on command line
  Example: C:\NECTools32\bin\cf850pro -i sit.s -c sct.s -d sys.h sys.cf
• Executing CF in build preprocessing Select [Build Settings...] from the [Build] menu of the PM+, open the [Build Preprocessing] tab, and then register the execution command of the CF850 Pro.
  Example: Registered command
  C:\NECTools32\bin\cf850pro -i sit.s -c sct.s -d sys.h sys.cf

(3) Register the information file created in Step (2) to the source file.

Example: sit.s, sct.s		→	ProjectWindow
		Drop