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在LCDK原理图第7页，GPIO6[`12]接的是LED4，你应该看到有灯在闪在对。
SD卡的检测好像是GPIO4[0]吧。
我加载程序后没有发现LED灯在闪烁，是我加载过程出问题了吗？正确过程是不是“New->Target configuration File—>target connect—>tools—>Gel files—>run—>load—>load program”??
从代码看PSC使能了，Pinmux也设了，没道理GPIO不切换输出。
确认程序跑起来了吗？在while循环里能设断点吗，能跑进去吗？
