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請問C中斷的問題
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高級會員
 
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請問各位在使用C的語法下如何快速的進入中斷副程式?
因為我寫了一個程式如下 我使用震盪頻率為4MHZ，進入中斷副程式的時間大概需要63us 之前使用組合語言的寫法，進入中斷副程式的時間大概只要不到20us吧 請問要如何加速 #include <p18f452.h> #include "diff_manchester.h" void isr_low(void); #pragma code low_vector=0x0018 void isr_low_direct(void) {_asm goto isr_low _endasm #pragma interrupt isr_low void isr_low(void) {diff_manchester();<-------執行到這裡大概就花63us } #pragma code void main(void) { unsigned char binary[]={0xfe,0xff,0xff,0xff,0xff,0xff}; unsigned char country[]={0,0,0,0}; unsigned char id[]={0,0,0,0,0,0,0,0,0,0,0,0}; init_diff_manchester(); while(1); }
發表於: 2007/2/2 13:57
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