TMS320C6748: About Nested interrupt for USB -host Data Saving Event requirement

Hi Sir

we used TI DSP C6748 for development without using SYSBIOS.

Currently we met the issue that the USB-HOST OTG will occupy the interrupt while doing data saving.

Does TI have any sample code for nested interrupt for reference (without using SYSBIOS)?

thanks for your help,

BR

Yimin