TMS570_Startup_FiqIntVect_MDD
High-Level Description
fiqintvect provides the assembly language fiq handling function. The function loads the program counter with the value of the FIQ Interrupt Vector Register, which contains the address of the ISR with the highest priority pending FIQ request.
Figures
Diagram – Function Data Sharing
No Shared Data
Variable Data Dictionary
For details on module input / output variable, refer to the Data Dictionary for the application. Input / output variable names are listed here for reference.
(Note: Full variable names required in table.)
(Note: All global variables including End Of Line data used should be shown here)
| Module Inputs | Module Outputs | |
|---|---|---|
| <None> | <None> | |
Module Internal Variables
This section identifies the name, range and resolutions for module specific data created by this module. If there are no range restrictions on the variable, the term “FULL” is placed into the table for legal range.
| Variable Name | Resolution | Legal Range (min) | Legal Range (max) | Software Segment |
|---|---|---|---|---|
| <None> | ||||
User defined typedef definition/declaration
This section documents any user types uniquely used for the module.
| Typedef Name | Element Name | User Defined Type | Legal Range (min) | Legal Range (max) |
|---|---|---|---|---|
| <None> | ||||
Constant Data Dictionary
Calibration Constants
This section lists the calibrations used by the module. For details on calibration constants, refer to the Data Dictionary for the application.
| Constant Name |
|---|
| <None> |
Program(fixed) Constants
Embedded Constants
All embedded constants whose values are provided in Eng units will be evaluated to the equivalent counts by using the FPM_InitFixedPoint_m() macro within the #define statement.
Local
| Constant Name | Resolution | Units | Value |
|---|---|---|---|
| <None> |
Global
This section lists the global constants used by the module. For details on global constants, refer to the Data Dictionary for the application.
| Constant Name |
|---|
| <None> |
Module specific Lookup Tables Constants
(This is for lookup tables (arrays) with fixed values, same name as other tables)
| Constant Name | Resolution | Value | Software Segment |
|---|---|---|---|
| <None> |
Functions/Macros used by the Sub-Modules
Library Functions / Macros
The library and functions / Macros that are called by the various sub modules are identified below,
<None>
Data Hiding Functions
<None>
Global Functions/Macros Defined by this Module
NOTE that all global functions in this module must be assembled in ARM mode. Therefore the .asm source file includes the .arm directive at the beginning of the file, applying the directive to all functions in the file.
Global Function #1
| Function Name | _fiqhandler | Type | Dir. | Min | Max | UTP Tol. |
| Arguments Passed | None | |||||
| Return Value | None |
Design Rationale
This function is required when more than one FIQ is configured in the system. When only one FIQ is configured, its ISR can be directly configured in DaVinci as the FIQ Handler. (Alternatively, the _fiqhandler function could be configured and its code changed to branch to the one FIQ ISR.) When there are multiple FIQs, the _fiqhandler function is needed so that the one handler configured in DaVinci will go to the correct ISR address as found in the processor FIQ Interrupt Vector Register.
Description
Loads the program counter with the value of the FIQ Interrupt Vector Register, which contains the address of the ISR with the highest priority pending FIQ request.
.def _fiqhandler
.asmfunc
_fiqhandler
ldr r8, fiqvectreg
ldr pc, [r8]
fiqvectreg .word 0xFFFFFE74
.endasmfunc
Local Functions/Macros Used by this MDD only
None
Software Module Implementation
Runtime Environment (RTE) Initial Values
This section lists the initial values of data written by this module but controlled by the RTE. After RTE initialization, the data in this table will contain these values.
| Data | Value |
|---|---|
| <None> |
Initialization Functions
None
Periodic Functions
None
Fault Recovery Functions
None
Shutdown Functions
None
Interrupt Functions
None
Serial Communication Functions
None
Execution Requirements
Execution Sequence of the Module
(Describe in words relevant details about the execution sequence of the different sub modules.)
Execution Rates for sub-modules called by the Scheduler
This table serves as reference for the Scheduler design
| Function Name | Calling Frequency | System State(s) in which the function is called |
|---|---|---|
| <None> |
Execution Requirements for Serial Communication Functions
| Function Name | Sub-Module called by (Serial Comm Function Name) |
|---|---|
| <None> |
Memory Map Definition Requirements
Sub Modules (Functions)
This table identifies the software segments for functions identified in this module.
| Name of Sub Module | Software Segment |
|---|---|
| _fiqhandler | N/A |
Local Functions
This table identifies the software segments for local functions identified in this module.
| Name of Local Function | Software Segment |
|---|---|
| None | |
Known Issues / Limitations With Design
None
Revision Control Log
| Item # | Rev # | Change Description | Date | Author Initials |
| 1 | 1.0 | Initial Revision of MDD | 6/10/2013 | KMC |