Slow code speeds

Hi,

When you debug the code; does it show "Erasing flash sectors.... Programming flash"? Cause what I feel is, you might be running the code via RAM and the program on flash might've been loaded long ago. So while debugging if the program loads quickly ie within 2 secs; then you're loading into RAM and not flash. Let me know what your observations are.

Regards,

Gautam

when you create your project you have to tell the linker where to place your code, in RAM and/or Flash.

most of the projects are set-up so that you can right click, Build Options, and set Active a Debug (RAM), Release (RAM), or Flash build.

if you place in Flash there is typically a switch on the hardware (LaunchPad or controlCARD) that must be positioned to allow the device to boot to flash and start running your application.

 

and a final point is to insure that you set-up the flash with correct number of waitstates for full speed operation.

But any sort of software timer that is running should be in RAM.  If you are using a hardware timer that GPIO toggle should be fine in Flash.

 

Hello Chris,

Thanks for the suggestions. It looks to me as if the code is indeed in flash... C-code and .map file below. As far as I can see the code execute from RAM when I download. When I press reset, the code runs from flash. I can tell by the different rates of LED cycling. The board boots in from flash fine after reset/power cycle - that's not the problem. I can't see why I get two different execution speeds...

Code:

/*

* main.c

*/

#include "DSP28x_Project.h" // Device Headerfile and Examples Include File

#include "f2802x_common/include/adc.h"

#include "f2802x_common/include/clk.h"

#include "f2802x_common/include/flash.h"

#include "f2802x_common/include/gpio.h"

#include "f2802x_common/include/pie.h"

#include "f2802x_common/include/pll.h"

#include "f2802x_common/include/wdog.h"

　

void delay_loop(void);

void Gpio_select(void);

ADC_Handle myAdc;

CLK_Handle myClk;

FLASH_Handle myFlash;

GPIO_Handle myGpio;

PIE_Handle myPie;

PWM_Handle myPwm;

　

　

　

　

//-----------------------------------------------------------------------------------------------------------------------------------------------------

int main(void) {

CPU_Handle myCpu;

PLL_Handle myPll;

WDOG_Handle myWDog;

　

　

　

　

myAdc = ADC_init((void *)ADC_BASE_ADDR, sizeof(ADC_Obj));

myClk = CLK_init((void *)CLK_BASE_ADDR, sizeof(CLK_Obj));

myCpu = CPU_init((void *)NULL, sizeof(CPU_Obj));

myFlash = FLASH_init((void *)FLASH_BASE_ADDR, sizeof(FLASH_Obj));

myGpio = GPIO_init((void *)GPIO_BASE_ADDR, sizeof(GPIO_Obj));

myPie = PIE_init((void *)PIE_BASE_ADDR, sizeof(PIE_Obj));

myPll = PLL_init((void *)PLL_BASE_ADDR, sizeof(PLL_Obj));

myPwm = PWM_init((void *)PWM_ePWM1_BASE_ADDR, sizeof(PWM_Obj));

myWDog = WDOG_init((void *)WDOG_BASE_ADDR, sizeof(WDOG_Obj));

　

WDOG_disable(myWDog);

Gpio_select();

 　

for(;;){

((GPIO_Obj *)myGpio)->GPADAT = 0xAAAAAAAA;

((GPIO_Obj *)myGpio)->GPBDAT = 0x0000000A;

delay_loop();

((GPIO_Obj *)myGpio)->GPADAT = 0x55555555;

((GPIO_Obj *)myGpio)->GPBDAT = 0x00000005;

delay_loop();

}

　

return 0;

}

　

void delay_loop()

{

long unsigned int i;

for (i = 0; i < 50000; i++) {}

}

void Gpio_select(void)

{

EALLOW;

((GPIO_Obj *)myGpio)->GPAMUX1 = 0x00000000;

((GPIO_Obj *)myGpio)->GPAMUX2 = 0x00000000;

((GPIO_Obj *)myGpio)->GPBMUX1 = 0x00000000;

((GPIO_Obj *)myGpio)->GPADIR = 0xFFFFFFFF;

((GPIO_Obj *)myGpio)->GPBDIR = 0x0000000F;

EDIS;

}

.map File:

******************************************************************************

TMS320C2000 Linker PC v6.2.0

******************************************************************************

>> Linked Tue Jan 14 22:03:21 2014

OUTPUT FILE NAME: <test1.out>

ENTRY POINT SYMBOL: "code_start" address: 003f7ff6

　

MEMORY CONFIGURATION

name origin length used unused attr fill

---------------------- -------- --------- -------- -------- ---- --------

PAGE 0:

RAMM0 00000050 000003b0 00000004 000003ac RWIX

OTP 003d7800 00000400 00000000 00000400 RWIX

FLASHB 003f6000 00001000 00000000 00001000 RWIX

FLASHA 003f7000 00000f80 00000180 00000e00 RWIX

CSM_RSVD 003f7f80 00000076 00000076 00000000 RWIX

BEGIN 003f7ff6 00000002 00000002 00000000 RWIX

CSM_PWL_P0 003f7ff8 00000008 00000008 00000000 RWIX

IQTABLES 003fe000 00000b50 00000000 00000b50 RWIX

IQTABLES2 003feb50 0000008c 00000000 0000008c RWIX

IQTABLES3 003febdc 000000aa 00000000 000000aa RWIX

ROM 003ff27c 00000d44 00000000 00000d44 RWIX

RESET 003fffc0 00000002 00000000 00000002 RWIX

VECTORS 003fffc2 0000003e 00000000 0000003e RWIX

PAGE 1:

BOOT_RSVD 00000000 00000050 00000000 00000050 RWIX

RAMM1 00000400 00000400 00000315 000000eb RWIX

RAML0 00008000 00000400 00000000 00000400 RWIX

　

SECTION ALLOCATION MAP

output attributes/

section page origin length input sections

-------- ---- ---------- ---------- ----------------

.pinit 0 003f7000 00000000 UNINITIALIZED

ramfuncs 0 003f7000 00000004 RUN ADDR = 00000050

003f7000 00000004 driverlib.lib : F2802x_asmfuncs.obj (ramfuncs)

.text 0 003f7004 00000166

003f7004 0000008f main.obj (.text)

003f7093 00000044 rts2800_ml.lib : boot.obj (.text)

003f70d7 00000019 : args_main.obj (.text)

003f70f0 00000019 : exit.obj (.text)

003f7109 00000012 driverlib.lib : F2802x_asmfuncs.obj (.text)

003f711b 00000009 rts2800_ml.lib : _lock.obj (.text)

003f7124 00000008 driverlib.lib : adc.obj (.text:_ADC_init)

003f712c 00000008 : pie.obj (.text:_PIE_init)

003f7134 00000008 : wdog.obj (.text:_WDOG_disable)

003f713c 00000007 : clk.obj (.text:_CLK_init)

003f7143 00000007 : flash.obj (.text:_FLASH_init)

003f714a 00000007 : gpio.obj (.text:_GPIO_init)

003f7151 00000007 : pll.obj (.text:_PLL_init)

003f7158 00000007 : pwm.obj (.text:_PWM_init)

003f715f 00000007 : wdog.obj (.text:_WDOG_init)

003f7166 00000004 : cpu.obj (.text:_CPU_init)

.cinit 0 003f716a 00000016

003f716a 0000000a rts2800_ml.lib : _lock.obj (.cinit)

003f7174 0000000a : exit.obj (.cinit)

003f717e 00000002 --HOLE-- [fill = 0]

csm_rsvd 0 003f7f80 00000076

003f7f80 00000076 driverlib.lib : F2802x_asmfuncs.obj (csm_rsvd)

codestart

* 0 003f7ff6 00000002

003f7ff6 00000002 driverlib.lib : F2802x_asmfuncs.obj (codestart)

csmpasswds

* 0 003f7ff8 00000008

003f7ff8 00000008 driverlib.lib : F2802x_asmfuncs.obj (csmpasswds)

.reset 0 003fffc0 00000002 DSECT

003fffc0 00000002 rts2800_ml.lib : boot.obj (.reset)

vectors 0 003fffc2 00000000 DSECT

.stack 1 00000400 00000300 UNINITIALIZED

00000400 00000300 --HOLE--

.ebss 1 00000700 00000015 UNINITIALIZED

00000700 0000000c main.obj (.ebss)

0000070c 00000004 rts2800_ml.lib : _lock.obj (.ebss)

00000710 00000004 : exit.obj (.ebss)

00000714 00000001 driverlib.lib : cpu.obj (.ebss)

　

GLOBAL DATA SYMBOLS: SORTED BY DATA PAGE

address data page name

-------- ---------------- ----

00000400 10 (00000400) __stack

00000700 1c (00000700) _myAdc

00000702 1c (00000700) _myPie

00000704 1c (00000700) _myPwm

00000706 1c (00000700) _myFlash

00000708 1c (00000700) _myGpio

0000070a 1c (00000700) _myClk

0000070c 1c (00000700) __unlock

0000070e 1c (00000700) __lock

00000710 1c (00000700) ___TI_cleanup_ptr

00000712 1c (00000700) ___TI_dtors_ptr

00000714 1c (00000700) _cpu

　

GLOBAL SYMBOLS: SORTED ALPHABETICALLY BY Name

address name

-------- ----

ffffffff .text

003f70f0 C$$EXIT

003f7124 _ADC_init

003f713c _CLK_init

003f7166 _CPU_init

003f7114 _DSP28x_DisableInt

003f7118 _DSP28x_RestoreInt

00000050 _DSP28x_usDelay

003f7143 _FLASH_init

003f714a _GPIO_init

003f707c _Gpio_select

003f712c _PIE_init

003f7151 _PLL_init

003f7158 _PWM_init

00000004 _RamfuncsLoadSize

003f7000 _RamfuncsLoadStart

00000050 _RamfuncsRunStart

003f7134 _WDOG_disable

003f715f _WDOG_init

00000700 __STACK_END

00000300 __STACK_SIZE

00000001 __TI_args_main

00000710 ___TI_cleanup_ptr

00000712 ___TI_dtors_ptr

ffffffff ___binit__

ffffffff ___c_args__

003f716a ___cinit__

ffffffff ___etext__

ffffffff ___pinit__

ffffffff ___text__

003f70d7 __args_main

0000070e __lock

003f7123 __nop

003f711f __register_lock

003f711b __register_unlock

00000400 __stack

0000070c __unlock

003f70f0 _abort

003f7093 _c_int00

00000714 _cpu

003f706c _delay_loop

003f70f2 _exit

003f7004 _main

00000700 _myAdc

0000070a _myClk

00000706 _myFlash

00000708 _myGpio

00000702 _myPie

00000704 _myPwm

003f7111 _setDBGIER

ffffffff binit

003f716a cinit

003f7ff6 code_start

ffffffff etext

ffffffff pinit

　

GLOBAL SYMBOLS: SORTED BY Symbol Address

address name

-------- ----

00000001 __TI_args_main

00000004 _RamfuncsLoadSize

00000050 _DSP28x_usDelay

00000050 _RamfuncsRunStart

00000300 __STACK_SIZE

00000400 __stack

00000700 __STACK_END

00000700 _myAdc

00000702 _myPie

00000704 _myPwm

00000706 _myFlash

00000708 _myGpio

0000070a _myClk

0000070c __unlock

0000070e __lock

00000710 ___TI_cleanup_ptr

00000712 ___TI_dtors_ptr

00000714 _cpu

003f7000 _RamfuncsLoadStart

003f7004 _main

003f706c _delay_loop

003f707c _Gpio_select

003f7093 _c_int00

003f70d7 __args_main

003f70f0 C$$EXIT

003f70f0 _abort

003f70f2 _exit

003f7111 _setDBGIER

003f7114 _DSP28x_DisableInt

003f7118 _DSP28x_RestoreInt

003f711b __register_unlock

003f711f __register_lock

003f7123 __nop

003f7124 _ADC_init

003f712c _PIE_init

003f7134 _WDOG_disable

003f713c _CLK_init

003f7143 _FLASH_init

003f714a _GPIO_init

003f7151 _PLL_init

003f7158 _PWM_init

003f715f _WDOG_init

003f7166 _CPU_init

003f716a ___cinit__

003f716a cinit

003f7ff6 code_start

ffffffff .text

ffffffff ___binit__

ffffffff ___c_args__

ffffffff ___etext__

ffffffff ___pinit__

ffffffff ___text__

ffffffff binit

ffffffff etext

ffffffff pinit

[55 symbols]

you must have CodeStartBranch.asm if you project runs from flash at all, correct?

seems like a clock divider or flash clock isn't set correctly.