ml5238的spi clk分频改为32

Signed-off-by: huhui <huhui@sharkgulf.com>

Application/bsp/spi.c

@@ -22,7 +22,7 @@ void spi0_init(void){
     spi_init_struct.frame_size           = SPI_FRAMESIZE_16BIT;
     spi_init_struct.clock_polarity_phase = SPI_CK_PL_LOW_PH_1EDGE;
     spi_init_struct.nss                  = SPI_NSS_SOFT;
-    spi_init_struct.prescale             = SPI_PSC_2 ;
+    spi_init_struct.prescale             = SPI_PSC_32 ;
     spi_init_struct.endian               = SPI_ENDIAN_MSB;
     spi_init(SPI0, &spi_init_struct);