TMS320C6672
Multicore Fixed and Floating-Point Digital Signal Processor
SPRS708C—February 2012
www.ti.com
7.26 Semaphore2
The device contains an enhanced Semaphore module for the management of shared resources of the DSP C66x
CorePacs. The Semaphore enforces atomic accesses to shared chip-level resources so that the read-modify-write
sequence is not broken. The semaphore block has unique interrupts to each of the cores to identify when that core
has acquired the resource.
Semaphore resources within the module are not tied to specific hardware resources. It is a software requirement to
allocate semaphore resources to the hardware resource(s) to be arbitrated.
The Semaphore module supports 8 masters and contains 32 semaphores to be used within the system.
There are two methods of accessing a semaphore resource:
•
•
Direct Access: A core directly accesses a semaphore resource. If free, the semaphore will be granted. If not, the
semaphore is not granted.
Indirect Access: A core indirectly accesses a semaphore resource by writing it. Once it is free, an interrupt
notifies the CPU that it is available.
7.27 Emulation Features and Capability
7.27.1 Advanced Event Triggering (AET)
The TMS320C6672 device supports Advanced Event Triggering (AET). This capability can be used to debug
complex problems as well as understand performance characteristics of user applications. AET provides the
following capabilities:
•
Hardware Program Breakpoints: specify addresses or address ranges that can generate events such as halting
the processor or triggering the trace capture.
•
Data Watchpoints: specify data variable addresses, address ranges, or data values that can generate events
such as halting the processor or triggering the trace capture.
•
•
Counters: count the occurrence of an event or cycles for performance monitoring.
State Sequencing: allows combinations of hardware program breakpoints and data watchpoints to precisely
generate events for complex sequences.
For more information on AET, see the following documents in ‘‘Related Documentation from Texas Instruments’’
on page 69:
•
Using Advanced Event Triggering to Find and Fix Intermittent Real-Time Bugs application report
•
Using Advanced Event Triggering to Debug Real-Time Problems in High Speed Embedded Microprocessor
Systems application report
7.27.2 Trace
The C6672 device supports Trace. Trace is a debug technology that provides a detailed, historical account of
application code execution, timing, and data accesses. Trace collects, compresses, and exports debug information
for analysis. Trace works in real-time and does not impact the execution of the system.
For more information on board design guidelines for Trace Advanced Emulation, see the 60-Pin Emulation Header
Technical Reference in ‘‘Related Documentation from Texas Instruments’’ on page 69.
Copyright 2012 Texas Instruments Incorporated
Peripheral Information and Electrical Specifications 217
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