三星2410test中2410addr.h文件内有下面一个宏定义<br /><br />#define ClearPending(bit) {<br /> rSRCPND = bit;<br /> rINTPND = bit;<br /> rINTPND;<br /> } <br />//Wait until rINTPND is changed for the case that the ISR is very short.<br /><br />例如使用 ClearPending(BIT_DMA0); // #define BIT_DMA0 (0x1<<17)<br /><br />不理解 rINTPND; 这一行是什么意思?<br />忘各位大侠赐教!!谢谢!!! |
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