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关于cc2640r2f 运行速度感觉是不是有些慢

我用simple peripheral例程修改的,在一个循环定时程序中加了个读取GPIO口电压高低的测试,然后测出来循环一次10ms多,用的这个Clock_getTicks,其他什么都没加,此时蓝牙只是广播,这个速度感觉偏慢是怎么回事?我主要要降低活动时间的功耗
GPIO_write(0, 1);
DELAY_US(10);
d=GPIO_read(1);
GPIO_write(0, 0);
time2=Clock_getTicks();
toc1=time2;
Display_print1(dispHandle, 3, 0, "d: %lu", time2);