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Diffstat (limited to 'c_user/interrupt_manager.rst')
| -rw-r--r-- | c_user/interrupt_manager.rst | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/c_user/interrupt_manager.rst b/c_user/interrupt_manager.rst index 5b9d6c3..52f4339 100644 --- a/c_user/interrupt_manager.rst +++ b/c_user/interrupt_manager.rst @@ -50,7 +50,7 @@ interrupt occurs, the processor will automatically vector to RTEMS. RTEMS saves and restores all registers which are not preserved by the normal C calling convention for the target -processor and invokes the user’s ISR. The user’s ISR is +processor and invokes the user's ISR. The user's ISR is responsible for processing the interrupt, clearing the interrupt if necessary, and device specific manipulation... index:: rtems_vector_number @@ -80,7 +80,7 @@ servicing. To minimize the masking of lower or equal priority level interrupts, the ISR should perform the minimum actions required to service the interrupt. Other non-essential actions -should be handled by application tasks. Once the user’s ISR has +should be handled by application tasks. Once the user's ISR has completed, it returns control to the RTEMS interrupt manager which will perform task dispatching and restore the registers saved before the ISR was invoked. @@ -119,9 +119,9 @@ RTEMS Interrupt Levels Many processors support multiple interrupt levels or priorities. The exact number of interrupt levels is processor dependent. RTEMS internally supports 256 interrupt levels which -are mapped to the processor’s interrupt levels. For specific +are mapped to the processor's interrupt levels. For specific information on the mapping between RTEMS and the target -processor’s interrupt levels, refer to the Interrupt Processing +processor's interrupt levels, refer to the Interrupt Processing chapter of the Applications Supplement document for a specific target processor. @@ -157,10 +157,10 @@ The ``rtems_interrupt_catch`` directive establishes an ISR for the system. The address of the ISR and its associated CPU vector number are specified to this directive. This directive -installs the RTEMS interrupt wrapper in the processor’s -Interrupt Vector Table and the address of the user’s ISR in the -RTEMS’ Vector Table. This directive returns the previous -contents of the specified vector in the RTEMS’ Vector Table. +installs the RTEMS interrupt wrapper in the processor's +Interrupt Vector Table and the address of the user's ISR in the +RTEMS' Vector Table. This directive returns the previous +contents of the specified vector in the RTEMS' Vector Table. Directives Allowed from an ISR ------------------------------ @@ -253,8 +253,8 @@ made from an ISR: Directives ========== -This section details the interrupt manager’s -directives. A subsection is dedicated to each of this manager’s +This section details the interrupt manager's +directives. A subsection is dedicated to each of this manager's directives and describes the calling sequence, related constants, usage, and status codes. @@ -288,7 +288,7 @@ routine (ISR) for the specified interrupt vector number. The``new_isr_handler`` The entry point of the previous ISR for the specified vector is returned in ``old_isr_handler``. -To release an interrupt vector, pass the old handler’s address obtained +To release an interrupt vector, pass the old handler's address obtained when the vector was first capture. **NOTES:** |