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问题描述:Demo板没有接任何外设,SPI_Master_Demo程序运行后卡在while (STATUS_SUCCESS != SPI_DRV_MasterGetTransferStatus(4, NULL))状态判断里面
解决办法:SPI的SCK引脚不能有任何接地和接VDD的行为,因为SCK引脚在发波的过程中会检测其输入的信号,如果发现发出去的电平和读回来的电平不相等会一直处于等待状态;
SPI默认会用发出的SCK回读进行数据采样,如果SCK被意外Tie0或者1,或者没有分配对应的引脚,以及分配了多个引脚都会出现上述状态,这个属于硬件异常。
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