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  • Elf's Avatar
    01-28-2019, 01:15 AM
    Lowering the SPI clock speed in the SD_t3.h library to 23950000 was successful in getting the card reader to work when compiled for 96 MHz. It failed at 24000000 when compiled for 96 MHz and 48 MHz, but succeeded when...
    11 replies | 251 view(s)
  • Elf's Avatar
    01-27-2019, 07:05 AM
    Unfortunately, setting the SPI clock speed for the Sd2Card object doesn't set it for the SD object needed to read a specific text file. It does show the Teensy 3.2 is capable of communicating through the sd card reader...
    11 replies | 251 view(s)
  • Elf's Avatar
    01-26-2019, 11:55 PM
    The same code runs on both Teensy 3.2s and Teensy 3.5s which are located on different boards. The Teensy 3.2 boards need the card reader, The Teensy 3.5 boards use the buildin card reader. How do I set the SPI clock...
    11 replies | 251 view(s)
  • Elf's Avatar
    01-26-2019, 11:37 PM
    I'm not sure what a photo will do. The Teensy 3.2 board is wired correctly. The Teensy_SDCARD_info sketch is able to access the card when the SPI clock speed is set to quarter speed. The card reader does have level...
    11 replies | 251 view(s)
  • Elf's Avatar
    01-26-2019, 08:56 PM
    I'm attempting to read an sd card attached to a Teensy 3.5 and also a Teensy 3.2. The Teensy 3.5 code works with no problem, but the Teensy 3.2 code fails. #ifdef TEENSY_35 if (!(SD.begin(BUILTIN_SDCARD))) {...
    11 replies | 251 view(s)
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Setting SPI clock for reading sd card 01-28-2019 01:15 AM
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01-26-2016