Embedded Target for TI C6000 DSP Release Notes

Known Software and Documentation Problems

This section includes a link to a description of known software and documentation problems in Version 2.0.

For a list of bugs reported in the previous release that remain open, see Known Software and Documentation Problems.

Targeting

• For reasons related to the Texas Instruments C compiler, you cannot use certain Simulink blocks for targeting. They are
• Singular Value Decomposition block in the library dspfactors
• Pseudoinverse block in the library dspinverses
• SVD Solver block in the library dspsolvers

• These blocks are not included in the run-time libraries and do not build when you generate code from your model.

• For this of the Embedded Target, the LED overrun indicator has been removed.

Demos

In MATLAB Demos (select Help->Demos from the MATLAB menu bar), the Embedded Target demonstration program LMS Adaptive Filtering runs slowly on DSP Starter Kit (DSK) boards. Design features of the board cause the slow processing across the RTDX link. Using the Texas Instruments XDS 510 JTAG/PC Controller, or an equivalent emulator, to connect your host to the DSK can alleviate the problem.

Data Types

C5000 and C6000 family processors handle integer data types differently. On C5000 family processors, 8-bit values do not have unique addresses. The C5000 family processors use 16-bit addresses natively. When you read and write to C5000 family processors, 8-bit integers in MATLAB are stored as 16-bit integers on the processor. In detail, the differences are

• When you write an 8-bit integer from MATLAB to a C5000 family processor, MATLAB pads the value to 16 bits and the processor stores the value as a 16-bit integer.
• When you read an 8-bit integer from the processor into MATLAB, the read function takes 16 bits from processor memory, discards the eight most significant bits, and returns the remaining eight bits to MATLAB as the integer value.

For these reasons, scripts that run on C6000 family processors may not run without modification on C5000 family processors.

General Target Operations

When your target digital signal processor is running, CCS uses up to 99% of the CPU cycles on your PC. Consequently, some other operations may be very slow, such as running the MATLAB help system or processing other applications.

LED Overrun Indicator

For this version of the product, the LED overrun indicator available in earlier product versions is not included.

Upgrading from an Earlier Release