- * A chunk (received via USB) contains a number of transfers (USB length
- * divided by 16) which contain a number of packets (5 per transfer) which
- * contain a number of samples (8bit repeat count per 16bit sample data).
+ * A chunk of sample memory was received via USB. These chunks contain
+ * transfers of 16 or 32 bytes each (model dependent size and layout).
+ * Transfers contain a number of packets (5 or 6 per transfer), which
+ * contain a number of samples (16 or 32 sampled pin values, and an
+ * 8bit repeat count for these sampled pin values). A sequence number
+ * follows the packets within the transfer, allows to detect missing or
+ * out of order reception.
+ *
+ * Memory layout for 16-channel models:
+ * - 16 bytes per transfer
+ * - 5x (u16 pins, and u8 count)
+ * - 1x u8 sequence number
+ *
+ * Memory layout for 32-channel models:
+ * - 32 bytes per transfer
+ * - 6x (u32 pins, and u8 count)
+ * - 2x u8 sequence number (inverted, and normal)
+ *
+ * This implementation silently ignores the (weak) sequence number.
+ *
+ * TODO Adjust the code paths for the 32-channel models. The version
+ * below currently only works correctly for 16-channel models.