CC1310: spi cs is high and not down

Part Number:CC1310

Hello,

In file CC1310_LaunchXL.h the spi cs is defined as:
on to be 0 and off to be 1:

/* SPI */
#define CC1310_LAUNCHXL_SPI_FLASH_CS          IOID_12
#define CC1310_LAUNCHXL_FLASH_CS_ON           0
#define CC1310_LAUNCHXL_FLASH_CS_OFF         1

But when I open spi channel spimaster.c:

masterSpi = SPI_open(Board_SPI_MASTER, &spiParams);

I don't see the IOID_12 in scope goes down. I still see it high.

BR,

Vitaly