The tinySA ULTRA now enumerates as a composite device: the CDC serial
port plus a mass storage interface (Bulk-Only Transport, SCSI). The SD
card is only presented to the PC in USB DISK mode (STORAGE menu or shell
command 'usbdisk on|off'), which stops sweeping and screen updates so the
mass storage thread owns SPI1 and spi_buffer. Outside the mode the PC
sees an empty card reader, so the serial port never re-enumerates. The
mode ends on touch, jog button, eject from the PC, card removal or
'usbdisk off'.
- usb_msc.c/h: mass storage thread, BOT state machine, SCSI commands
- usbcfg.c: composite descriptors (IAD, bcdDevice 0x0201), bulk EP3,
requests hook, packet memory reuse on a repeated SET_CONFIGURATION and
data toggle reset on CLEAR_FEATURE (both specific to this ChibiOS fork)
- ui.c: USB DISK menu item and mode screen
- main.c: 'usbdisk' command; shell commands that could use SPI1 are
refused while the mode is active
F072 builds are unchanged. Tested on HW V0.5.4 with Windows 11: about
620 KB/s read and 370 KB/s write, data verified against FatFs reads.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
The zero-span time grid can be calculated before actual_sweep_time_us is updated, leaving the display aligned to the previous sweep duration.
Calculate grid geometry without mutating global state, recompute it after the measured sweep time is stored, and redraw only when the resulting tuple changes. Use 64-bit arithmetic through the final time-domain division so short sweeps retain exact pixel geometry.
It's now possible to save capture, traces, or both by clicking SD card icon
Disabling both options hides SD card icon
Config submenu was added to Storage menu, and all settings were moved there
Existing config remains valid, and default behavior with saving a capture is kept
added run "file.name" console command, only for in cmd file
added AUTO SAVE to trigger menu
added wait {seconds} console command
added 3rd waterfall size
erikkaashoek
PhysicistJohn
alexey.lysiuk
Bohdan Kmit