Antichambre

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About Antichambre

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    MIDIbox Guru
  • Birthday July 25

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  1. J16 sorry, the one to the SD-Card.
  2. Ground connected, one probe to 3V3, second probe to RC1 pin of J16E, switch it ON and check what happens. With your USB Oscilloscope you can maybe record all the startup phase and show us?
  3. Most of the issues I found about "ACMD41" are a voltage problem, Gerald is maybe right you need to check that...
  4. In the firmware, mios32_sdcard.c
  5. Yes you can add a delay mechanism at startup.
  6. The SPI doesn't use high transfer rate, edit:but more than 2MB/s for sure. A SC 1Go is maybe enough? Maybe try another HC, other brand/model. Mine is a micro-SD PNY 16Go HC I with adapter. Note: I've just checked: // init SPI port for fast frequency access (ca. 18 MBit/s) // this is required for the case that the SPI port is shared with other devices MIOS32_SPI_TransferModeInit(MIOS32_SDCARD_SPI, MIOS32_SPI_MODE_CLK1_PHASE1, MIOS32_SDCARD_SPI_PRESCALER); 18Mbit/s is the maximum, it's 2.25MByte/s. Very close to 2MB/s Do you really feel the difference?
  7. So don't use XC, I've got a HC and it works fine.
  8. I know it works when started correctly but did you try another SD-Card, this one is perhaps a little sensitive...
  9. MIDI is supposed to isolate your devices electrically(opto-coupled), did you try to disconnect the devices one by one? Maybe only one device causes this issue... Is there another MIDIbox connected to?
  10. Did you try another SD Card?
  11. The HAARP, an Hardware Advanced Arpeggiator.

    Hi Andy, First thanks for taking a look. CAN(with transceiver) is a differential pair signal, then bad behaviour like crosstalk to power and audio paths should be very limited, but you're right this has to be tested, noted! Best regards Bruno
  12. The HAARP, an Hardware Advanced Arpeggiator.

    I finally decided to add CAN transceiver to the board. The modules will be able to communicate natively in midi thru the regular euro power supply ribbon, using MCAN. No need of an other board to connect to the external world too, just a connector in front which will give access to the lines MCAN_L and MCAN_H. Best regards Bruno  
  13. 1910-dipCoreF4-Euro-PCB.png

    From the album The HAARP

    CAN Transceiver added.
  14. The HAARP, an Hardware Advanced Arpeggiator.

    Yes for CAN, J18 is always the one. But Andy's wCore and Disco platform have only One-Wire connection. This one has Power pins for transceiver supply, RX and TX are separated. But you can add the regular Resistor and a Diode on the dipBoardF4 to link others Cores directly and easily with the One-Wire. This MCAN connector may be called J18E for 'extended' I suppose... A small transceiver module will be created to link the CAN bus with the external world, internally I planned to use the Euro Power connector, the power ribbon by using BUS1 and BUS2(last pins of the 16pins IDC) called CV and GATE sometime but never used in fact. Best regards Bruno