delay.h

来自「该工程文件包含了 myson系列mtv018/130 osd芯片的i2C通讯和访」· C头文件 代码 · 共 17 行

extern void __delay(unsigned short loops);

#define mdelay(msec) \
do { \
	if (msec <= 0xffff/LOOPS_PER_MSEC) \
		__delay(msec*LOOPS_PER_MSEC); \
	else { \
		unsigned short c = msec; \
		while (c--) \
			__delay(LOOPS_PER_MSEC); \
	} \
} while (0)