begriffs open source - cmsis-freertos/blob - Demo/ARM7_AT91SAM7S64_IAR/USB/USB_ISR.s79

   1                 RSEG ICODE:CODE
   2                 CODE32
   3
   4                 EXTERN vUSB_ISR
   5                 PUBLIC vUSBISREntry
   6
   7 ; Wrapper for the USB interrupt service routine.  This can cause a
   8 ; context switch so requires an assembly wrapper.
   9
  10 ; Defines the portSAVE_CONTEXT and portRESTORE_CONTEXT macros.
  11 #include "ISR_Support.h"
  12
  13 vUSBISREntry:
  14
  15         portSAVE_CONTEXT                        ; Save the context of the current task.
  16
  17         bl      vUSB_ISR                                ; Call the ISR routine.
  18
  19         portRESTORE_CONTEXT                     ; Restore the context of the current task -
  20                                                                 ; which may be different to the task that
  21                                                                 ; was interrupted.
  22
  23                 END
  24