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Chapter 5 Detailed Applications
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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).
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;****************************************************************
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;
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; MR308 start up program for C language
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; COPYRIGHT(C) 2003 RENESAS TECHNOLOGY CORPORATION
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; AND RENESAS SOLUTIONS CORPORATION ALL RIGHTS RESERVED
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; MR308 V.1.10 Release 1
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;
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; ****************************************************************
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; "$Id: crt0mr.a30,v 1.1 2005/05/20 06:28:47 inui Exp $"
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;*A1* 2005-02-28 for ES
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;
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.LIST OFF
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.INCLUDE c_sec.inc
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.INCLUDE mr308.inc
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.INCLUDE sys_rom.inc
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.INCLUDE sys_ram.inc
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.LIST ON
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.GLB __SYS_INITIAL
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.GLB __END_INIT
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.GLB __init_sys,__init_tsk
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.IF M16C70!=0
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regoffset .EQU -0220H
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.ELSE
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regoffset .EQU 0
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.ENDIF
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;-----------------------------------------------------------------
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; SBDATA area definition
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;-----------------------------------------------------------------
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.GLB __SB__
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.SB __SB__
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;=================================================================
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; Initialize Macro declaration
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;-----------------------------------------------------------------
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N_BZERO .MACRO TOP_,SECT_
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MOV.B #00H, R0L
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MOV.L #TOP_, A1
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MOV.W #sizeof SECT_, R3
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SSTR.B
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.ENDM
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N_BCOPY .MACRO FROM_,TO_,SECT_
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MOV.L #FROM_,A0
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MOV.L #TO_,A1
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MOV.W #sizeof SECT_, R3
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SMOVF.B
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.ENDM
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BZERO .MACRO TOP_,SECT_
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.local _end, _loop
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MOV.L #TOP_, A1
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MOV.B #00H, R0L
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MOV.L #(sizeof SECT_ & 0FFFFFFH), R3R1
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XCHG.W R1,R3
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_loop:
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SSTR.B
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CMP.W #0,R1
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JEQ _end
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MOV.B R0L,[A1]
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ADD.L #1,A1
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MOV.W #0FFFFH,R3
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SUB.W #1,R1
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JMP _loop
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_end:
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.ENDM
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BCOPY .MACRO FROM_,TO_,SECT_
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.local _end, _loop