Dhrystone TMS570

Hi Luc,

according wait state configuration, I am sure that  wait state are set correctly because it shows performance rise 50  per cent, However i don't have exactly dhrystone score

for information:  According to ECC information (spnu489) , TCRAM wrapper checks ECC, So When you  enable ECC checking on TMS570  you decrease the execution time.

I know that ECC checking is disabled after reset, The startup provide by MDK ARM , doesn't have assembly code to disable ECC: pag 282

ACTM_Disable_ECC

    MRC p15............

Shoul  i add assembly code to disable ECC, knowing that it is not defined in startup code?

I am not sure if there are any other operations  wich I sould remove whitout affecting read and write process in  Flash and Ram memories

Thanks

Best Regards

Edna SALAZAR

Hi,

Concerning the last question, I realized that I didn't initialize the  floating point unite, In fact I didn't find optimization in  assembler code which make several mathematic calculation:

So I added the following code to Startup:

                MRC     p15, 0, r0, c1, c0, 2      ; Read Coprocessor Access Control Register (CPACR)
                ORR     r0, r0, #(0xF << 20)       ; Enable access to CP 10 & 11
                MCR     p15, 0, r0, c1, c0, 2      ; Write Coprocessor Access Control Register (CPACR)
                ISB
               MOV     r0, #0x40000000
               VMSR    FPEXC, r0      

then at level compilation, I obtain the error --->Fatal error: C3900U: Unrecognized option '--float_support'.

 I found  a lot information about initialization FPU:

http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/140632.aspx

Keeping in mind that, (using as compiler DS-5 and/or MDK ARM uvision V4) I added  the libraries:   pf035a_api.li pf035a_api_eabi.lib pf035a_api_eabi.lib etc in Keil\ARM\CMSIS and also in my  proyect path

Second I included libreries #include "f035.h" ...etc in main file.

However I have the same resultnFatal error: C3900U: Unrecognized option '--float_support

Thanks a lot for your information

Hi Edna,

I posted the same in separate forum for floating point initialization. Here is the link

http://e2e.ti.com/support/microcontrollers/hercules/f/312/p/138479/500428.aspx#500428

In this link you will find the information you want.

Apart from that, please make sure before compiling, you mentioned the float_support option for both compiler and assembler.

If you are using some makefile.mk for compiling your files, be aware of extra spaces, termination of line, etc., like that.

you are still facing the same issue, please send me your file. I will check it here.

Thanks and Regards

Gowdham Natarajan