:orphan:

.. title:: SPI_NRFX_RAM_BUFFER_SIZE

.. option:: CONFIG_SPI_NRFX_RAM_BUFFER_SIZE

*Size of RAM buffers for SPIM peripherals*

Type: ``int``

Help
====

SPIM peripherals cannot transmit data directly from flash. Therefore,
a buffer in RAM needs to be provided for each instance of SPI driver
using SPIM peripheral, so that the driver can copy there a chunk of
data from flash and transmit it.
The size is specified in bytes. A size of 0 means that this feature
should be disabled, and the application must then take care of not
supplying buffers located in flash to the driver, otherwise such
transfers will fail.

Direct dependencies
===================

\ :option:`NRFX_SPIM <CONFIG_NRFX_SPIM>` && \ :option:`SPI_NRFX <CONFIG_SPI_NRFX>` && \ :option:`SPI <CONFIG_SPI>`

*(Includes any dependencies from ifs and menus.)*

Default
=======

- 8

Kconfig definition
==================

.. highlight:: kconfig

At ``drivers/spi/Kconfig.nrfx:192``

Included via ``Kconfig:8`` → ``Kconfig.zephyr:32`` → ``drivers/Kconfig:38`` → ``drivers/spi/Kconfig:212``

Menu path: (Top) → Device Drivers → SPI hardware bus support → nRF SPI nrfx drivers

.. parsed-literal::

    config SPI_NRFX_RAM_BUFFER_SIZE
    	int "Size of RAM buffers for SPIM peripherals"
    	default 8
    	depends on \ :option:`NRFX_SPIM <CONFIG_NRFX_SPIM>` && \ :option:`SPI_NRFX <CONFIG_SPI_NRFX>` && \ :option:`SPI <CONFIG_SPI>`
    	help
    	  SPIM peripherals cannot transmit data directly from flash. Therefore,
    	  a buffer in RAM needs to be provided for each instance of SPI driver
    	  using SPIM peripheral, so that the driver can copy there a chunk of
    	  data from flash and transmit it.
    	  The size is specified in bytes. A size of 0 means that this feature
    	  should be disabled, and the application must then take care of not
    	  supplying buffers located in flash to the driver, otherwise such
    	  transfers will fail.

*(The 'depends on' condition includes propagated dependencies from ifs and menus.)*