Data Sampling

After allocating buffer memory for data storage, the la command instructs PIO (Programmable Input/Output) and DMA (Direct Memory Access) to start sampling and then immediately exits. The actual processing is performed by PIO and DMA, so CPU load is almost zero. When the buffer memory is full, sampling stops automatically.

Start sampling with the enable subcommand.

Running the disable subcommand with the la command stops data sampling and releases PIO, DMA, and buffer memory resources. Normally, you do not need to explicitly run the disable subcommand.

L:/>la disable

Running the enable subcommand again reinitializes resources and starts data sampling. The previous settings for GPIO pins and other sampling parameters are retained, so if there are no changes, just run enable.

L:/>la enable