Renesas M3T-ICC740 Informações Técnicas descarregar pdf (Página 31)

6. Editing the Project

After you created a new project, you must edit cstartup.s31 and lnk740.xcl and change

options as necessary.

6.1. Editing cstartup.s31

In cstartup.s31, edit the items listed in Table 6 as necessary.

Table

Table Table

Table 6

Items to Edit in

Items to Edit in Items to Edit in

Items to Edit in cstartup.s31

Edit item Subject Corresponding line

Stack page Stack area Line 137

Interrupt vector area Target microcomputer Line 375

6.1.1. Changing the Stack Page

The line 137 in cstartup.s31 is used to set the stack page. Here, the stack page for the 3803

group CPU mode register is set to page 1.

LDM #0CH, 3BH ; set stack page : 3803 Group

Set the stack page to suit your target microcomputer.

If you set the stack page to page 0, you need to change CSTACK segment settings in the

lnk740.xcl file.

6.1.2. Changing the Interrupt Vector Area

The line 375 is used to set the size of the interrupt vector area. Here, the size of the

interrupt vector area in the 3803 group of microcomputers is set.

BLKB 0FFFEH - 0FFDCH - 2 ; 3803 Group

Area settings by BLKB requires that an amount equal to the vector size be subtracted by the

set area (as subtracted by 2 in the above setting).

Note, however, that the beginning address of the interrupt vector area is set in the lnk740.xcl

file.

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Renesas M3T-ICC740 Informações Técnicas Página 31