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  • mborgerson's Avatar
    10-10-2019, 03:49 AM
    As part of an in-progress data logging program, I've been working on optimizing the uploading of files from the Teensy SD card to a host program that I've written for the PC. After several days work, I've come up...
    0 replies | 44 view(s)
  • mborgerson's Avatar
    09-17-2019, 01:44 AM
    I have written a sample sketch that shows how to transfer more than 32KB in a single DMA transfer. To do this you have to bypass the functions of the dmaChannel object, which does not allow transfers larger than 32KB....
    2 replies | 113 view(s)
  • mborgerson's Avatar
    09-05-2019, 05:14 AM
    I'm trying to keep my code as simple as possible---and that means doing the DMA with one transaction. The eventual goal is to continuously output data from a video frame buffer as is done in the DMA DAC video example. ...
    3 replies | 75 view(s)
  • mborgerson's Avatar
    09-03-2019, 11:00 PM
    In a different thread I asked about sending a DMA transfer > 32K bytes---which doesn't seem to be supported by the DMAChannel object. I postponed investigation of large transfers and switched to sending my video frame...
    3 replies | 75 view(s)
  • mborgerson's Avatar
    09-01-2019, 05:27 PM
    I am working on a project to generate gray-scale NTSC video using a 3-bit R2R ladder DAC on GPIOD bits 0 to 2. My plan is to use a large buffer of uint8_t to hold all the sync, porch, black and video levels and send...
    2 replies | 113 view(s)
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About mborgerson

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About mborgerson
building embedded systems for oceanographers since 1978
Corvallis, OR
Retired embedded systems engineer


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Uploading Teensy files to PC 10-10-2019 03:49 AM
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