RTOS/SIMPLELINK-CC2640R2-SDK: SPI transfer problem when two spi handle share same bus

Part Number: SIMPLELINK-CC2640R2-SDK
Other Parts Discussed in Thread: CC2640R2F

Tool/software: TI-RTOS

Hi everyone,

I am living a trouble with SPI driver and my sdk version 1_35.
There is one master (CC2640R2F) and two slaves in my system. These two slaves shares the same SCLK,MOSI,MISO. One slave uses POL0_PHA1 and other uses POL1_PHA1 spi frame format.

typedef enum CC2640R2_LAUNCHXL_SPIName {
    CC2640R2_LAUNCHXL_SPI0 = 0,
    CC2640R2_LAUNCHXL_SPI1,

    CC2640R2_LAUNCHXL_SPICOUNT
} CC2640R2_LAUNCHXL_SPIName;

typedef enum CC2640R2_LAUNCHXL_SPIName {
    CC2640R2_LAUNCHXL_SPI0 = 0,
    CC2640R2_LAUNCHXL_SPI1,

    CC2640R2_LAUNCHXL_SPICOUNT
} CC2640R2_LAUNCHXL_SPIName;


const SPICC26XXDMA_HWAttrsV1 spiCC26XXDMAHWAttrs[CC2640R2_LAUNCHXL_SPICOUNT] = {
    {
        .baseAddr           = SSI0_BASE,
        .intNum             = INT_SSI0_COMB,
        .intPriority        = ~0,
        .swiPriority        = 0,
        .powerMngrId        = PowerCC26XX_PERIPH_SSI0,
        .defaultTxBufValue  = 0,
        .rxChannelBitMask   = 1<<UDMA_CHAN_SSI0_RX,
        .txChannelBitMask   = 1<<UDMA_CHAN_SSI0_TX,
        .mosiPin            = CC2640R2_LAUNCHXL_SPI0_MOSI,
        .misoPin            = CC2640R2_LAUNCHXL_SPI0_MISO,
        .clkPin             = CC2640R2_LAUNCHXL_SPI0_CLK,
        .csnPin             = CC2640R2_LAUNCHXL_SPI0_CSN,
        .minDmaTransferSize = 10
    },
    {
        .baseAddr           = SSI1_BASE,
        .intNum             = INT_SSI1_COMB,
        .intPriority        = ~0,
        .swiPriority        = 0,
        .powerMngrId        = PowerCC26XX_PERIPH_SSI1,
        .defaultTxBufValue  = 0,
        .rxChannelBitMask   = 1<<UDMA_CHAN_SSI1_RX,
        .txChannelBitMask   = 1<<UDMA_CHAN_SSI1_TX,
        .mosiPin            = CC2640R2_LAUNCHXL_SPI1_MOSI,
        .misoPin            = CC2640R2_LAUNCHXL_SPI1_MISO,
        .clkPin             = CC2640R2_LAUNCHXL_SPI1_CLK,
        .csnPin             = CC2640R2_LAUNCHXL_SPI1_CSN,
        .minDmaTransferSize = 10
    }
};

const SPI_Config SPI_config[CC2640R2_LAUNCHXL_SPICOUNT] = {
    {
         .fxnTablePtr = &SPICC26XXDMA_fxnTable,
         .object      = &spiCC26XXDMAObjects[CC2640R2_LAUNCHXL_SPI0],
         .hwAttrs     = &spiCC26XXDMAHWAttrs[CC2640R2_LAUNCHXL_SPI0]
    },
    {
         .fxnTablePtr = &SPICC26XXDMA_fxnTable,
         .object      = &spiCC26XXDMAObjects[CC2640R2_LAUNCHXL_SPI1],
         .hwAttrs     = &spiCC26XXDMAHWAttrs[CC2640R2_LAUNCHXL_SPI1]
    },
};

const uint_least8_t SPI_count = CC2640R2_LAUNCHXL_SPICOUNT;

I am using CC2640R2_LAUNCHXL_SPI0 for slave which uses POL0_PHA1 and CC2640R2_LAUNCHXL_SPI1 for slave which uses POL1_PHA1.

I opened SPI interface by calling;

handle0 = SPI_open(CC2640R2_LAUNCHXL_SPI0,&params0)
handle1 = SPI_open(CC2640R2_LAUNCHXL_SPI1,&params1)

I checked both spi handle,  these are not equal to NULL.

When i try to write or read something by SPI, the program seems to be stuck in SPI_transfer function. I did not get SPI_Status value because, SPI_transfer never return.

Everything works when only one slave is connected to SPI (I mean that, i did one spi_open for one slave and other slave is deasserted)
I only drive one spi slave at one time.

I am wondering that Does the issue occurs because of two different spi handle shares the same spi bus?
Is it permitted that two spi handle use the same SPI bus ?
Do you have any suggestion that why this problem occurs ?
Is there any way to change spi frame format without reopening the spi interface ?

Thanks for your attention.
Have a nice day