39 lines
864 B
Plaintext
39 lines
864 B
Plaintext
$NOMOD51
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NAME ?C_STARTUP
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EXTRN CODE (?C_START)
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PUBLIC ?C_STARTUP
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CLKCON EQU 0B2H
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EXTRN IDATA (STACK)
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CSEG AT 1000H
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?C_STARTUP: LJMP STARTUP1
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?C_C51STARTUP SEGMENT CODE
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RSEG ?C_C51STARTUP
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STARTUP1:
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MOV SP, #STACK-1
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NOP
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;此处在全局变量初始化之前，可清除ram
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;清除idata
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MOV R0,#0x08
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FOR_EACH_IDATA:
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MOV @R0,#0x00
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INC R0
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CJNE R0,#STACK,FOR_EACH_IDATA
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;清除xdata
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CLR A
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MOV DPTR,#0x0000
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FOR_EACH_XDATA:
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MOVX @DPTR,A
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INC DPTR
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MOV R0,DPL
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MOV R1,DPH
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CJNE R0,#0xDC,FOR_EACH_XDATA
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CJNE R1,#0x07,FOR_EACH_XDATA
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NOP
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LJMP ?C_START
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END |