boards: shields: Add nRF9160 DK overlay for arduino_uno_click shield - #71106
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FYI, since #71076 was merged, I just rebased this onto |
erwango
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Name used for this file is confusing as we can easily mixup with boards/nordic/nrf9160dk/nrf9160dk_nrf9160_common.dtsi.
I'd suggest to use something like nrf9160dk_nrf9160_arduino_uno_common.dtsi
The original Arduino Uno provides the same SCL/SDA on two sets of pins, but the nRF9160 DK maps these pins to two different pairs of GPIO. When using the Arduino Uno Click Shield board with the nRF9160 DK, the P0.18/P0.19 pair must be used. Also, the default pin group for the nRF9160 DK includes RTS/CTS HW flow control, but the Arduino Uno Click Shield board does not connect these pins (only TX/RX are connected on the shield). This keeps RX/TX on the same pins, but just removes RTS/CTS from the pin groups. References: - Arduino Uno R3 pinout: https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf - Arduino Uno R3 schematic: https://www.arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf - Arduino UNO click shield schematic: https://download.mikroe.com/documents/add-on-boards/click-shields/arduino-uno/arduino-uno-click-shield-schematic-v101.pdf Signed-off-by: Chris Wilson <chris@cgnd.dev>
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The original Arduino Uno provides the same SCL/SDA signals on two sets of pins, but the nRF9160 DK maps these pins to two different pairs of GPIO on the nRF9160 SIP. As a result, when using the Arduino Uno Click Shield board with the nRF9160 DK, the
P0.18/P0.19pair must be used.Also, the default pin group for the nRF9160 DK includes
RTS/CTSHW flow control, but the Arduino Uno Click Shield board does not connect these pins (onlyTX/RXare connected on the shield). This keepsRX/TXon the same pins, but just removesRTS/CTSfrom the pin groups.How I tested this
I don't have any of the in-tree MikroE Click shields to test this with, so I used a MikroE Weather Click board I had on hand.
I added a new shield definition for the Weather Click in #71076 so by merging that PR together with this one:
west build -p -b nrf9160dk/nrf9160/ns samples/sensor/bme280 -- -DSHIELD="arduino_uno_click mikroe_weather_click" west flashReferences
Arduino Uno R3 pinout: https://docs.arduino.cc/resources/pinouts/A000066-full-pinout.pdf
Arduino UNO click shield schematic: https://download.mikroe.com/documents/add-on-boards/click-shields/arduino-uno/arduino-uno-click-shield-schematic-v101.pdf