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Duet3D / RepRapFirmware

OO C++ RepRap Firmware
GNU General Public License v3.0
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SD CARD Hot-Plug #97

Closed iDavidFeng closed 7 years ago

iDavidFeng commented 7 years ago

Hi David,I found that the On-Board SD Card didn't support Hot Plug(Duet 0.8.5).If I Pulg the SD Card,I must Reset the board.But I have checked the schematic and found that the Card Detect Pin has been tied to PB27,it means this board can support the Hot Pulg.Is this a bug or anything else?

dc42 commented 7 years ago

  1. After re-inserting the card, you can send M21 to get the board to re-initialise the card instead of resetting the board. There is a firmware bug that means this doesn't always recognise some changes to the files on the card, but this is fixed in firmware 1.19alpha2 and later.

  2. There is a bug in the ATSAM3X8E chip that means that once we enable the MCU temperature sensor, the CD pin input no longer works. So we wouldn't be able to support hot-plugging on the Duet 0.6/0.8.5 without using M21 unless we disable MCU temperature monitoring. This doesn't apply to the Duet WiFi and Duet Ethernet, so we may support hot-plugging on those boards in the future.

iDavidFeng commented 7 years ago

Got it,thank you！