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-rw-r--r--source/lang/api/hardwarespi.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/source/lang/api/hardwarespi.rst b/source/lang/api/hardwarespi.rst
index 3e71fb6..f90fc07 100644
--- a/source/lang/api/hardwarespi.rst
+++ b/source/lang/api/hardwarespi.rst
@@ -57,6 +57,10 @@ The speed at which the SPI port communicates is configured using a
.. note:: Due to hardware issues, you can't use the frequency
``SPI_140_625KHz`` with SPI port 1.
+The "mode" value determines the clock phase and polarity, like so:
+
+.. doxygenenum:: spi_mode
+
You'll need to determine the correct values for ``frequency``,
``bitOrder``, and ``mode`` yourself, by consulting the datasheet for
the device you're communicating with. Continuing our example from