From Embedded Image Processing on the TMS320C6000 DSP: Examples in Code Composer Studio and MATLAB
4.4 Linear Filtering of Images on the TI C64x
As described in 2.1, the C6416 fixed-point DSP is a newer member of the C6000 DSP family that offers higher performance than the C62xx series (it is not truly fair to compare the C64x to the C67x, as the C67x is a floatingpoint architecture). With regards to the CCStudio projects and C source code accompanying this book, all of the C62xx/C67xx projects were built and tested using the EVM development environment. The C64xx projects in this book, on the other hand, were built and tested using the C6416 DSK.
This section describes how to optimize a low-pass filtering program targeting the C6416. As one would expect for a DSP marketed to the imaging community, there is a version of IMGLIB optimized specifically for the C64xx line of DSPs11. Starting with a core IMGLIB convolution routine (that works!), an initial fixed-point implementation of a 3x3 low-pass filtering operation will be optimized in much the same fashion as in sections 4.3.3-4.3.5, by paging in blocks of the image as they are needed.
The source code for these programs are found in the Chap4\LinearFilter\C64xx directory. As in the C62xx/C67xx case, there are some common project files: the image.h header file containing default pixel data for the Lenna image and the linker command file image_filter.cmd. The image.h header file remains much the same as its C62xx/C67xx counterpart, except that in_img buffer is defined to be exactly N_PIXELS long, as...
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