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c30 中使用asm code
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新會員
 
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請問我在c30中要使用asm 的code 時會產生變數未定義,可否請大家幫我解惑,感激不盡. 說明如下:
source.h 中定義: unsigned long ADDRESS; source.c 中的程式: main() { ADDRESS=0x0000; Nop(); asm ("mov #tblpage(ADDRESS),W0"); } 編譯後linker 告訴我 asm那一段程式中ADDRESS 未定義 請問C與ASM共用一個變數應該如何去定義. THANKS!
發表於: 2008/6/17 12:39
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Re: c30 中使用asm code
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資深會員
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正常來說, 加"_"即可.
你可以試試 TBLPAG = __builtin_tblpage(&ADDRESS); 只是我都是用來查表時使用, 沒試過可不可以查RAM, 可能不行.
發表於: 2008/6/17 13:46
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Thanks,
Edward Lee |
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Re: c30 中使用asm code
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資深會員
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TBLPAG = 0x7F;
asm("mov %0,w5"::"g"(word)); asm("mov %0,w6"::"g"(dest_add)); asm("tblwtl.w w5, [w6]"); 其實還蠻好用 比KEIL C 好用 我現在是microchip 及 8051 都要寫
發表於: 2008/6/18 11:58
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 ^^   ^^ ====
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