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TMS320F280039C: F280039 SPI时钟多个头如何处理

Part Number: TMS320F280039C

各位大神:

我在调节SPI的时候,发现时钟总是开头多一个刺,导致数据错乱,程序如下:

cs_low;
SPI_transmit16Bits(SPIB_BASE, 0x3003);
temp56= SPI_receive24Bits(SPIB_BASE, SPI_DATA_LITTLE_ENDIAN, 0,0);
cs_high;

实际CS和SPI时钟如下:

请大家帮忙看看是哪里的问题。。。

感谢~~