Extends the bd-66hx serial protocol with two new Orin→ESP32 commands:
CMD_OTA_CHECK (0x10): triggers gitea_ota_check_now(), responds with
TELEM_VERSION_INFO (0x84) for Balance and IO (current + available ver).
CMD_OTA_UPDATE (0x11): uint8 target (0=balance, 1=io, 2=both) — triggers
uart_ota_trigger() for IO or ota_self_trigger() for Balance.
NACK with ERR_OTA_BUSY or ERR_OTA_NO_UPDATE on failure.
New telemetry: TELEM_OTA_STATUS (0x83, target+state+progress+err),
TELEM_VERSION_INFO (0x84, target+current[16]+available[16]).
Wires OTA stack into app_main: ota_self_health_check on boot,
gitea_ota_init + ota_display_init after peripherals ready.
CMakeLists updated with all OTA component dependencies.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Replaces Orin↔ESP32-S3 BALANCE CAN comms (0x300-0x303 / 0x400-0x401)
with binary serial framing over CH343 USB-CDC at 460800 baud.
Protocol matches bd-wim1 (sl-perception) exactly:
Frame: [0xAA][LEN][TYPE][PAYLOAD][CRC8-SMBUS]
CRC covers LEN+TYPE+PAYLOAD, big-endian multi-byte fields.
Commands (Orin→ESP32): HEARTBEAT/DRIVE/ESTOP/ARM/PID
Telemetry (ESP32→Orin): TELEM_STATUS, TELEM_VESC_LEFT (ID 56),
TELEM_VESC_RIGHT (ID 68), ACK/NACK
VESC CAN TWAI kept for motor control; drive commands from Orin
forwarded to VESCs via SET_RPM. Hardware note: SN65HVD230
rewired from IO43/44 to IO2/IO1 to free IO43/44 for CH343.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
