How to configure external peripherals

Chee Shen said:

I'm very much interested in the matrix operation in C200 too.

Some searching in internet only tells C6000 can do the matrix operation handly, but none regarding C2000 implementation.

Shen,

C28x does not have any special hardware to accelerate matrix operations, but it can certainly do them in C or assembly.

We don't have a library today, but if you could answer some questions it will help us understand the need for the future.

Could you give more details on the application and the need for matrix operations. 

Is the only operation of interest a multiplication?  What size matrix?  Are you interested in a IQmath version or a floating-point version?

What is the benchmark you are targeting (i.e. how many cycles?).

Thank you for your input.

Lori

thanks lori

  I'm interested only in matrix multiplication floating point.

the matrix multiplication and order of matrix is (3x3 with 3x3) and (3x3 with 3x1)

example of my matrix element cos(0.00000008381903)

can u suggest me how to interface external memory to TMS320F28335 processor with 16bit data bus and 16 bit address bus.  i'm using ezDSP development kit for my project.

please give me any sample code for testing.

with regards

Raghavendra

Re: XINTF example, there is one for CCSv3.3 (SPRC530) or CCSv4 (www.ti.com/controlsuite )

C:\tidcs\c28\DSP2833x\v131\DSP2833x_examples\dma_xintf_to_ram

C:\ti\controlSUITE\device_support\f2833x\v132\DSP2833x_examples_ccsv4\dma_xintf_to_ram

We're looking to add some matrix math examples as well

Hi Lori,

Without those hardware in C2000, using C is possible but most of us are looking for faster operation(e.g with library  in assembly), since the system clock for TMS320F28335 is only 150MHz. Says in an application of 20kHz sampling period, the number of cycle available in each cycle is only 7500. TMS320F28346 with 300Mhz CC is not a solution since it does not have built in ADC. 

1)

The C2000 series DSP is meant to real time control of machines,and etc which utilizing QEP,CAP,ADC,and PWM. When come to higher level of control of machine, the state space model of machine( matrix size may ranged from 2x2 to 5x5, or slightly more) were occasionally required in control algorithm, depends on nature of control principle.State space models are able to be discretized and programmed in DSP in non-matrix form, but there are cases in which the non-matrix form is hesistate to be used. Besides machine control, some principle in signal processing, like filtering, maybe needed, on line transposition of matrix is required sometimes.

2)

Operations interested are arithmetic matrix operation(add,substract,multiply), matrix transposition, determinant.

3) no benchmarking

Regards,

Chee Shen

2812 and  28335 user

Dear Lori,

I'm using TMS320F28335 TM DSP Platform Code Composer Studio DSK V3.3 IDE, and eDSP tool for F28335

i facing two problems

problem 1)

    when i tried with example programs eCAN communication program its working for internal can communications

    the example programs are * ecan_a_to_b_xmit and * ecan_back2back

    When i used ecan_back2back example program for Externel CAN devices. the transmission is happening but while receiving i'm not able to receive desired data

    But in the case of ecan_a_to_b_xmit example program only transmission part is happening no reception.

problem 2)

    i can only run my program in only in debug mode alone, please help me out how to generate .hex file from .out file while re-build the project.

Are there any news on the support for matrix operations for floating point operations for c28335 (or the new c28069) ?