We are using Spy-By_Wire mode of JTAG to flash the code in MSP430 in the development stage. But when the device goes into production our mechanical enclosure is ultrasonic welded and we will not have access to the JTAG port or connector. In such case if we require to flash MSP430 can we use another processor (iMX6UL) which is already there in design and the processor is communicating with external system over USB.
If it is possible then what interface would be used between MSP and iMX. Also let us know is there anyway to update the MSP430 firmware with out accessing the JTAG.