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| =Pin functions (mux)=
| | #REDIRECT [[EXT_Connector]] |
| Currently this needs recompiling u-boot, but some easier control is planned.
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| By default UART2 pins are set up as GPIOs, and UART3 as an UART.
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| =Power supply=
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| Currently requires patching bootloaders (xload and u-boot).
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| This is connected to VAUX3 supply on PMIC, with these programmable voltages (200mA max):
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| 1.5V, 1.8V, 2.5V, 2.8V and 3.0V, with 2.8V as default.
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| '''warning''': at the time of this writing, both bootloaders (xload and u-boot) set this to 2.8V, so don't rely on this providing other voltages during reboot until you patch both bootloaders.
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| =GPIOs=
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| Can be controlled using GPIO sysfs class device, as described in beagleboard tutorials [http://bbfordummies.blogspot.com/2009/07/1.html here].
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| =UART3=
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| By default, kernel messages are directed there and a terminal with a shell is attached. The port runs at 115200 8N1 baud rate.
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| ==Disabling kernel messages==
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| To disable kernel mesages, you need to edit kernel boot arguments. Probably easiest way to do it is to create autoboot.txt and place on root directory of a card in slot1 with this content:
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| <source lang="bash">
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| setenv bootargs ubi.mtd=4 ubi.mtd=3 root=ubi0:rootfs rootfstype=ubifs rw rootflags=bulk_read
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| </source>
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| Alternatives are using u-boot environment (configure through USB or UART3 serial before system boots up) or patching and reflashing u-boot itself.
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| ==Disabling attached terminal==
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| For this you need to edit /etc/inittab on pandora rootfs and comment out these lines:
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| <source lang="bash">
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| #S0:2345:once:/sbin/getty 115200 ttyS0
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| #O2:2345:once:/sbin/getty 115200 ttyO2
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| </source>
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