Renesas 70 - Manual (Page 95)

Chapter 5 Detailed Applications
- 85 -
5.8.1 C Language Startup Program (crt0mr.a30)
Figure 5.14 C Language Startup Program (crt0mr.a30)
shows the C language startup program(crt0mr.a30).
1 ;****************************************************************
2 ;
3
; MR308 start up program for C language
4 ; COPYRIGHT(C) 2003 RENESAS TECHNOLOGY CORPORATION
5
; AND RENESAS SOLUTIONS CORPORATION ALL RIGHTS RESERVED
6 ; MR308 V.1.10 Release 1
7
;
8 ; ****************************************************************
9 ; "$Id: crt0mr.a30,v 1.1 2005/05/20 06:28:47 inui Exp $"
10
;*A1* 2005-02-28 for ES
11 ;
12
.LIST OFF
13 .INCLUDE c_sec.inc
14
.INCLUDE mr308.inc
15 .INCLUDE sys_rom.inc
16 .INCLUDE sys_ram.inc
17
.LIST ON
18
19
.GLB __SYS_INITIAL
20 .GLB __END_INIT
21
.GLB __init_sys,__init_tsk
22
23 .IF M16C70!=0
24
regoffset .EQU -0220H
25 .ELSE
26
regoffset .EQU 0
27 .ENDIF
28
29 ;-----------------------------------------------------------------
30
; SBDATA area definition
31
;-----------------------------------------------------------------
32 .GLB __SB__
33
.SB __SB__
34
35
;=================================================================
36 ; Initialize Macro declaration
37
;-----------------------------------------------------------------
38
N_BZERO .MACRO TOP_,SECT_
39 MOV.B #00H, R0L
40
MOV.L #TOP_, A1
41 MOV.W #sizeof SECT_, R3
42
SSTR.B
43 .ENDM
44
45
N_BCOPY .MACRO FROM_,TO_,SECT_
46 MOV.L #FROM_,A0
47
MOV.L #TO_,A1
48 MOV.W #sizeof SECT_, R3
49
SMOVF.B
50 .ENDM
51
52
BZERO .MACRO TOP_,SECT_
53 .local _end, _loop
54
55 MOV.L #TOP_, A1
56
MOV.B #00H, R0L
57 MOV.L #(sizeof SECT_ & 0FFFFFFH), R3R1
58
XCHG.W R1,R3
59
_loop:
60 SSTR.B
61
CMP.W #0,R1
62 JEQ _end
63
MOV.B R0L,[A1]
64 ADD.L #1,A1
65
MOV.W #0FFFFH,R3
66 SUB.W #1,R1
67 JMP _loop
68
_end:
69 .ENDM
70
71 BCOPY .MACRO FROM_,TO_,SECT_
72
.local _end, _loop