CSL SAR How to change channel

Marcelino Martinez

Hi,

I have installed CSL to use AD in ezDSP5505. I have tried examples CSL_SAR examples (Polling, Interrupt), programs work fine. By default channel number selected is number 3. I would like to change the channel. I have changed line

status = SAR_chanOpen(&SarObj,CSL_SAR_CHAN_3);

for

status = SAR_chanOpen(&SarObj,CSL_SAR_CHAN_0);

But after after compiling and executing again, I got the same answer, and the values showed on the screen are really obtained from channel 3.

Channel Number selected 3

How can I cange the Analog Input ? I would like to use a potentiometer to control tunning paramenters in digital filters using GPAIN0,1,2,3.

Thanks

over 13 years ago

0 Hyun Kim over 13 years ago

TI__Genius 14965 points

Hi,

This function overwrite to back to Channel 3.

status = SAR_A2DMeasParamSet(SarHandle,CSL_KEYPAD_MEAS,&chanNo);

CSL_PEYPAD_MEAS --> CHAN_3

There is no Channel 0 assigning in csl_sar.c code.You need to replace with your code.

Regards,

Hyun

0 Marcelino Martinez over 13 years ago in reply to Hyun Kim

Prodigy 150 points

I am sorry, but I can not fix the problem with your answer. Coud you give an example ?

Regards

0 Marcelino Martinez over 13 years ago in reply to Marcelino Martinez

Prodigy 150 points

OK, I understand the problem.

I would like to use SAR to convert 3 analog channels connected to GPAIN0, GPAIN1 and GPAIN2 using CSL in eZDSP 5505. Do you know if I can do a sequential conversion of this channel ?

Regards

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CSL SAR How to change channel