FreeCalypso > hg > freecalypso-docs
diff DUART-cable @ 32:78c2cc6ebbb8
DUART-cable: update for DUART28
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 24 Sep 2020 02:47:14 +0000 |
parents | f7ed8c45a8ec |
children |
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--- a/DUART-cable Wed Sep 23 23:06:58 2020 +0000 +++ b/DUART-cable Thu Sep 24 02:47:14 2020 +0000 @@ -1,3 +1,14 @@ +2020-09 update: we have now produced our own DUART28 adapter that takes the +place of PLDkit FT2232D breakout boards. The article that follows was written +in 2019-12, before our DUART28 was even conceived, and it was written for +PLDkit FT2232D adapters. The new cable that needs to be used with DUART28 is +different: DUART28 brings out a 10-pin header in the same pinout as our Calypso +boards, thus the connection between the two boards becomes a straight-through +10-wire ribbon cable. + +Original 2019-12 article follows +================================ + The Calypso chip has two UARTs, called MODEM and IrDA in the chip docs. The primary UART (MODEM) has 4 signals (TxD, RxD, RTS and CTS), whereas the other UART (IrDA) has data leads only (TxD and RxD). TI's C-Sample and D-Sample