CCS/TMS320F28069: ADC Program is not working with TMS320F28069

Ranjit,

Does the adc_soc example from ControlSUITE work on your board? It uses both PWM and ADC.

-Tommy

Tommy,

Thanks for your reply. I programmed adc_soc_example on my f20869 dev board. The ADCResult values are pretty weird. I didn't make any changes in the code and I didn't apply analog input. (analog pins (A0- A7 & B0-B7) are floating).

AdcResult.ADCRESULT0 unsigned int 0 0x00000B00@Data
AdcResult.ADCRESULT1 unsigned int 265 0x00000B01@Data
AdcResult.ADCRESULT2 unsigned int 75 0x00000B02@Data
AdcResult.ADCRESULT3 unsigned int 75 0x00000B03@Data
AdcResult.ADCRESULT4 unsigned int 74 0x00000B04@Data
AdcResult.ADCRESULT5 unsigned int 74 0x00000B05@Data
AdcResult.ADCRESULT6 unsigned int 74 0x00000B06@Data
AdcResult.ADCRESULT7 unsigned int 75 0x00000B07@Data
AdcResult.ADCRESULT8 unsigned int 0 0x00000B08@Data
AdcResult.ADCRESULT9 unsigned int 0 0x00000B09@Data
AdcResult.ADCRESULT10 unsigned int 0 0x00000B0A@Data
AdcResult.ADCRESULT11 unsigned int 0 0x00000B0B@Data
AdcResult.ADCRESULT12 unsigned int 0 0x00000B0C@Data
AdcResult.ADCRESULT13 unsigned int 0 0x00000B0D@Data
AdcResult.ADCRESULT14 unsigned int 0 0x00000B0E@Data
AdcResult.ADCRESULT15 unsigned int 0 0x00000B0F@Data
Add new expression

Is that problem with a dev board or any other issues?

Regards,
Ranjit

Ranjit,

The ADC conversion results are undefined when the ADC input pin is floating.

You must provide a signal on the pin in order to produce valid conversion results.

-Tommy

Tommy,

I applied analog signal on all the the analog pin on different instances on my Docking Station. The ADC (AdcResult.ADCRESULT ) values are not varying on my expressions window. (I clicked Continuous refresh)


- Ranjit

Ranjit,

The adc_soc example will only convert ADCINA2 and ADCINA4 so you can focus on those two signals. Is the ConversionCount variable updating during execution?

Can you confirm that you are using the RAM build configuration? You should see "28069_RAM_lnk.cmd" included in the list of project files.

Code that is executing out of RAM is easier to debug vs executing out of FLASH.

-Tommy

Tommy,

I am really  beginner to this microcontroller. How can I change the executing the program from Flash to RAM and Vice Versa?


This is my .cmd file.

MEMORY
{
PAGE 0 :
/* BEGIN is used for the "boot to SARAM" bootloader mode */

BEGIN : origin = 0x000000, length = 0x000002
RAMM0 : origin = 0x000050, length = 0x0003B0
RAML0_L3 : origin = 0x008000, length = 0x002000 /* RAML0-3 combined for size of .text */
/* in Example_F2806xSWPrioritezedInterrupts */
RESET : origin = 0x3FFFC0, length = 0x000002
FPUTABLES : origin = 0x3FD860, length = 0x0006A0 /* FPU Tables in Boot ROM */
IQTABLES : origin = 0x3FDF00, length = 0x000B50 /* IQ Math Tables in Boot ROM */
IQTABLES2 : origin = 0x3FEA50, length = 0x00008C /* IQ Math Tables in Boot ROM */
IQTABLES3 : origin = 0x3FEADC, length = 0x0000AA /* IQ Math Tables in Boot ROM */

BOOTROM : origin = 0x3FF3B0, length = 0x000C10


PAGE 1 :

BOOT_RSVD : origin = 0x000002, length = 0x00004E /* Part of M0, BOOT rom will use this for stack */
RAMM1 : origin = 0x000400, length = 0x000400 /* on-chip RAM block M1 */
RAML4 : origin = 0x00A000, length = 0x002000 /* on-chip RAM block L4 */
RAML5 : origin = 0x00C000, length = 0x002000 /* on-chip RAM block L5 */
RAML6 : origin = 0x00E000, length = 0x002000 /* on-chip RAM block L6 */
RAML7 : origin = 0x010000, length = 0x002000 /* on-chip RAM block L7 */
RAML8 : origin = 0x012000, length = 0x002000 /* on-chip RAM block L8 */
USB_RAM : origin = 0x040000, length = 0x000800 /* USB RAM */
}


SECTIONS
{
/* Setup for "boot to SARAM" mode:
The codestart section (found in DSP28_CodeStartBranch.asm)
re-directs execution to the start of user code. */
codestart : > BEGIN, PAGE = 0
ramfuncs : > RAMM0, PAGE = 0
.text : > RAML0_L3, PAGE = 0
.cinit : > RAMM0, PAGE = 0
.pinit : > RAMM0, PAGE = 0
.switch : > RAMM0, PAGE = 0
.reset : > RESET, PAGE = 0, TYPE = DSECT /* not used, */

.stack : > RAMM1, PAGE = 1
.ebss : > RAML4, PAGE = 1
.econst : > RAML4, PAGE = 1
.esysmem : > RAML4, PAGE = 1

IQmath : > RAML0_L3, PAGE = 0
IQmathTables : > IQTABLES, PAGE = 0, TYPE = NOLOAD

/* Allocate FPU math areas: */
FPUmathTables : > FPUTABLES, PAGE = 0, TYPE = NOLOAD

DMARAML5 : > RAML5, PAGE = 1
DMARAML6 : > RAML6, PAGE = 1
DMARAML7 : > RAML7, PAGE = 1
DMARAML8 : > RAML8, PAGE = 1

/* Uncomment the section below if calling the IQNexp() or IQexp()
functions from the IQMath.lib library in order to utilize the
relevant IQ Math table in Boot ROM (This saves space and Boot ROM
is 1 wait-state). If this section is not uncommented, IQmathTables2
will be loaded into other memory (SARAM, Flash, etc.) and will take
up space, but 0 wait-state is possible.
*/
/*
IQmathTables2 : > IQTABLES2, PAGE = 0, TYPE = NOLOAD
{

IQmath.lib<IQNexpTable.obj> (IQmathTablesRam)

}
*/
/* Uncomment the section below if calling the IQNasin() or IQasin()
functions from the IQMath.lib library in order to utilize the
relevant IQ Math table in Boot ROM (This saves space and Boot ROM
is 1 wait-state). If this section is not uncommented, IQmathTables2
will be loaded into other memory (SARAM, Flash, etc.) and will take
up space, but 0 wait-state is possible.
*/
/*
IQmathTables3 : > IQTABLES3, PAGE = 0, TYPE = NOLOAD
{

IQmath.lib<IQNasinTable.obj> (IQmathTablesRam)

}
*/

}

/*
//===========================================================================
// End of file.
//===========================================================================
*/


- Ranjit

Ranjit,

It looks to me like you are running out of RAM.  The simple way to tell with ControlSUITE examples is that "_RAM" is in the name of the .CMD file for executing out of RAM.  Another way is to compare the "origin" address locations in the .CMD file against the memory map locations in the datasheet.

The common way to switch from RAM to FLASH is to:

1. exclude the RAM CMD file from the build using the right-click context menu in project file view
2. add the desired FLASH CMD file to the project
3. clean & build project

-Tommy

Tommy,

What is the solution to clean up RAM space?

Regards,

Ranjit

Ranjit,

Can you elaborate on your question?  What do you mean by "clean up" RAM space?

If you are seeing compile errors because your program cannot fit into memory, you can try to optimize your CMD file and variable placement: 

-Tommy