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MSP432 LaunchPad 时钟问题



刚刚接触MSP432。

我用的TI的官方例程:cs_hfxt_start

结果发现led闪烁时间并非1秒钟。

在程序中while()循环前添了一句CS_getMCLK(); 发现MCLK值是32768。这是为什么呢?

我又把关于HFXT的注释掉,加了一句:CS_setDCOCenteredFrequency(CS_DCO_FREQUENCY_48); //设置 DCO = 48MHz

MCLK是48000000了,但是led闪烁时间还是不对。请问这是什么情况啊?