Sending 16-bit Words with SPI Master

[dasblinkenlight]

Is it possible to configure SPI Master API to send multi-byte words?

My peripheral expects transfers in 16-bit blocks (CS goes low, 16 bits are clocked in, CS goes high). I've looked at the nrf_drv_spi_config_t struct, but it does not appear to have a field to specify the number of bytes in each data unit. Is there a way to configure SPI Master to group bytes automatically, or is my only option would be driving CS pin manually?

[Susheel Nuguru]

You have to use nrf_drv_spi_transfer which takes the TX and RX buffer points plus their lengths. For SPIM it uses EasyDMA. If you set the txbuffer length to 2 then the CS should go low, 16 bit clock is given and then the CS should go high. This is mentioned in the infocenter here

[Susheel Nuguru]

You have array list for it in the hardware but i dont know if drivers support it yet. So for now, loop works just fine