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Hi All, I am attempting to adapt the Cronus to reclock a multichannel USB streamer and desperately need to know MCLK out and BCLK WORDCLK and the 4 data input pins on Cronus and it woould also be handy to know for Hermess BBB. Also, Miero kindly advised Hermes header of Cronus Pin 15 is the clock selection switch - "Pull it HIGH for 48k sampling rates". Is 'high' 5V or 3.3V? Thanks in advance! Poss Edited by user Monday, March 21, 2016 7:09:16 AM(UTC)
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Obviously a self help forum :-) - I'll answer my own question (from http://bbb.ieero.com/): Still don't know what V high is but am assuming 5V
BBB pin mapping
P9_25 - A14/0 - mcasp0_ahclkx (oscillator) - GPIO3_21 P9_31 - A13/0 - mcaps0_aclkx (bit clock) - SPI1_SCLK P9_29 - B13/0 - mcasp0_fsx (lr clock) - SPI1_D0 P9_30 - D12/0 - mcasp0_axr0 (data0) - SPI1_D1 P9_41 - D13/0 - mcasp0_axr1 (data1) - GPIO3_20 shared pin with D14 P9_?? - ?12/2 - mcasp0_axr2 (data2) - configurable, see bellow P9_27 - C13/2 - mcasp0_axr3 (data3) - GPIO3_19 P9_24 - D15/7 - uart1_txd (external masterclock switch) - GPIO0_15 P9_26 - D16/7 - uart1_rxd (I2S/DSD format switch)- GPIO0_14 P9_14 - U14/7 - gpmc_a2 (cape power switch) - EHRPWM1A Default mode (kernel param snd_soc_botic.pinconfig=default or not set) P9_42 - B12/2 - mcasp0_axr2 (data2) - GPIO3_18 Compat mode (kernel param snd_soc_botic.pinconfig=compat) P9_28 - C12/2 - mcasp0_axr2 (data2) - SPI1_CS0 shared with HDMI audio output GND is available on any of these pins P9_{01,02,43,44,45,46}.
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Looks like P9_24 is the the serial UART output - so am now assuming 'HIGH' is 3.3V' Some rudimentary doco (or link thereto) on what the connections/jumpers etc on the Cronus/BBB Hermes are would be greatly appreciated Edited by user Sunday, April 3, 2016 10:00:39 AM(UTC)
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 1 user thanked Brian Donegan for this useful post.
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