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Diffstat (limited to 'docs/mimxrt/quickref.rst')
| -rw-r--r-- | docs/mimxrt/quickref.rst | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/docs/mimxrt/quickref.rst b/docs/mimxrt/quickref.rst index 0a14c632a..c75fe60c8 100644 --- a/docs/mimxrt/quickref.rst +++ b/docs/mimxrt/quickref.rst @@ -301,13 +301,19 @@ There are up to four hardware SPI channels that allow faster transmission rates (up to 30Mhz). Hardware SPI is accessed via the :ref:`machine.SPI <machine.SPI>` class and has the same methods as software SPI above:: - from machine import SPI + from machine import SPI, Pin spi = SPI(0, 10000000) + cs_pin = Pin(6, Pin.OUT, value=1) + cs_pin(0) spi.write('Hello World') + cs_pin(1) For the assignment of Pins to SPI signals, refer to :ref:`Hardware SPI pinout <mimxrt_spi_pinout>`. +The keyword option cs=n can be used to enable the cs pin 0 or 1 for an automatic cs signal. The +default is cs=-1. Using cs=-1 the automatic cs signal is not created. +In that case, cs has to be set by the script. Clearing that assignment requires a power cycle. Notes: |