Hello
I'd like to experiment with my beagleboard, but considering the
various USB problems, to increase its connectivity options and
reliability, I am mostly thinking about using the 2 other UARTs
instead.
So I've got some very naive hardware questions. Any help is appreciated.
I was first thinking about putting the SD port in SDIO mode (pretec
wifi) and moving the memory card to MMC2. From what I've read in the
SRM, RevC makes MMC2+UART2 possible (MUX0).
Any report on SDIO status then? The only messages I could find dated
from ~1 year ago and weren't very enthusiastic.
I am also wondering if anyone made a daughter board for the extension
connector to have at least UART2 and MMC2 (MUX0), with the proper
voltage reg. to interface the 1.8V signals to 3.3 or 5V - and in that
case, if they are for sale?
If there is no daugtherboard, I am thinking of wiring directly a
MMC-plus or MMC-mobile, which operate at 1.8v. Will it work as good as
I believe, without requiring anything else? For the UART2, I could
always put a max3218, but some premade solution would be better.
I'm also thinking about UART1, but it would then require using both J4
and J5 to have RTS/CTS along with RX/TX (MUX2). Beside making it
impossible to connect a LCD panel, wouldn't that also interfere with
the DVID port? Could the 4 pins be on either J4 or J5 in a future
release? (like UART2 MUX0 changes on revC)
A final question about UART3: there doesn't seems to be CTS/RTS
signals (nothing about them in the SRM). Any reason why UART3 is
exposed then, instead of say UART2?
Could a future release expose a UART with RTS/CTS on the IDC10 instead of UART3?
It'd be easier than having to dig UART2 or UART1 and wondering about
how to do that and the consequences it may have.