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MSP432E401Y: USB Firmware upgrade

Part Number: MSP432E401Y

Tool/software:

Hi,

We are doing firmware upgrade for RTOS application based on the example code "boot_serial_usb_flash_MSP432", 

After successful write data in flash, on reset, there is a hard fault. 

The core registers 

-SP points to 0x00000008 address (which is address of .bootvecs in  Application file)

-Link register pointed to Hwi_excHandler

The bootloader starting address is 0x00000000 and my application starting address is 0x00004000

Can you pls help us in resolving this issue? Also share if there any RTOS based examples for USB firmware upgrade