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| − | '''Raspberry Pi Firmware GPIO Expander Driver''' | + | '''Raspberry Pi Firmware GPIO Expander Driver unit''' |
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| − | As of February 2017 the Raspberry Pi firmware contains a mailbox interface to allow control of the GPIO expander on the Raspberry Pi 3 and Compute Module 3. | + | As of February 2017 the Raspberry Pi firmware contains a mailbox interface to allow control of the GPIO expander on the Raspberry Pi 3/4 and Compute Module 3/4. |
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| | Unlike the earlier virtual GPIO interface this mailbox service now supports most GPIO functionality including getting and setting a pin value, getting and changing the pin function and getting or changing the pull up/down options. | | Unlike the earlier virtual GPIO interface this mailbox service now supports most GPIO functionality including getting and setting a pin value, getting and changing the pin function and getting or changing the pull up/down options. |
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| | This driver implements most of the functionality available in the new mailbox service as a standard Ultibo GPIO device and also provides direct mailbox calls to allow access to any additional options not covered by the GPIO device API. | | This driver implements most of the functionality available in the new mailbox service as a standard Ultibo GPIO device and also provides direct mailbox calls to allow access to any additional options not covered by the GPIO device API. |
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| − | When included in a project this driver replaces the Virtual GPIO functions provided by the PlatformRPi2 and PlatformRPi3 units. | + | When included in a project this driver replaces the Virtual GPIO functions provided by the PlatformRPi2, PlatformRPi3, PlatformRPi4 units. |
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| | According to /arch/arm/boot/dts/bcm2710-rpi-3-b.dts the following pin assignments are known: | | According to /arch/arm/boot/dts/bcm2710-rpi-3-b.dts the following pin assignments are known: |
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| | * GPIO_PIN_7 = Power LED (Input / Active Low) | | * GPIO_PIN_7 = Power LED (Input / Active Low) |
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| − | For the Raspberry Pi 3B+ the assignments show in /arch/arm/boot/dts/bcm2710-rpi-3-b.dts have changed as follows: | + | For the Raspberry Pi 3B+ the assignments shown in /arch/arm/boot/dts/bcm2710-rpi-3-b.dts have changed as follows: |
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| | *GPIO_PIN_2 = Power LED (Active Low) | | *GPIO_PIN_2 = Power LED (Active Low) |
| | *GPIO_PIN_4 = HDMI Detect (Input / Active Low) | | *GPIO_PIN_4 = HDMI Detect (Input / Active Low) |
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Exception encountered, of type "Error"