14.1.1.3.5.3. OpenMV Cam RT1062: NXP SPSDK¶

The OpenMV Cam RT1062 is the only camera without a USB DFU bootloader. It boots from external flash through an on-flash secure bootloader (SBL) that presents the NXP MCU-bootloader USB interface. Flashing uses the NXP SPSDK tools blhost and sdphost, which the OpenMV SDK bundles and invokes as python -m spsdk.apps.blhost / python -m spsdk.apps.sdphost.

To enter the bootloader, reset or replug the camera: the SBL is already present, so no jumper is needed, and it enumerates as the SBL device (blhost VID:PID 0x15A2:0x0073). The firmware-only sequence is:

blhost -u 0x15A2,0x0073 -t 120000 -- flash-erase-region 0x60040000 <firmware_size>
blhost -u 0x15A2,0x0073 -- write-memory 0x60040000 firmware.bin
blhost -u 0x15A2,0x0073 -- reset

<firmware_size> is the byte size of firmware.bin. To also reset the ROMFS, run these before the firmware steps:

blhost -u 0x15A2,0x0073 -t 120000 -- flash-erase-region 0x60800000 0x00800000
blhost -u 0x15A2,0x0073 -- write-memory 0x60800000 romfs0.img

The RT1062 16 MiB external-flash map (0x60000000–0x61000000, from OpenMV IDE’s configuration):

Region	Address	Size (hex)	Size (bytes)
Flash configuration block (FCB)	`0x60000000`	`0x1000`	4,096 (4 KiB)
Secure bootloader (SBL)	`0x60001000`	`0x3F000`	258,048 (252 KiB)
Firmware	`0x60040000`	`0x3C0000`	3,932,160 (3.75 MiB)
FAT disk (internal filesystem)	`0x60400000`	`0x400000`	4,194,304 (4 MiB)
ROMFS	`0x60800000`	`0x800000`	8,388,608 (8 MiB)

The FCB, FAT disk, and ROMFS sizes are fixed in the IDE configuration. The SBL and firmware sizes shown are the region span to the next region’s base address (the start addresses are fixed; the actual image is smaller).