RM46L852: How to use spiTransmitData with uint8_t* ?

Tool/software:

Hi,

I'm implementing an Hardware Abstraction Layer for the TI hercules HalCoGen .
Here's the function signature that I need to implement:

Mcu_Status_t mcu_spi_blocking_send(Mcu_SpiHandle_t spi, size_t size, uint8_t data[size]);

Notice that, while the implementation has a data type of `uint8_t*`, the `spiTransmitData()` function provided by HalCoGen only accept `uint16_t*`.

To solve this problem I was forced to copy the data to a temporary buffer:

Mcu_Status_t mcu_spi_blocking_send(Mcu_SpiHandle_t spi, size_t size, uint8_t data[size])
{
    // We need to copy the data in the buffer because the TI only accept uint16_t*.
    // This stress the stack and this is slow.
    uint16_t buffer[256] = {0}; 
    for (size_t i = 0; i < size; i++)
    {
        buffer[i] = data[i];
    }
    
    spi_cs(true);
    spiTransmitData(SPI_REG, &g_spi_data_format, size, buffer);
    spi_cs(false);
    
    return MCU_SUCCESS;
}

Unnecessary buffer copies are pretty slow and stresses the stack, so I wondered:

Is there a smarter way to do this? Maybe I'm missing a HalCoGen configuration that would solve this problem?

If not, do you have an example of a custom `spiTransmitData` implementation that use uint8_t exclusively ? 

P.S. I don't think I can simply cast the uint8_t* to uint16_t* because of the endianness of the TI RM46. 

Regards,

Gabriel