LAUNCHXL-CC2640R2: How to use IDAC for generating programmable current

Hello Riza,

Here is Sensor Controller Studio documentation for the ISRC (current source).  You can also search for more ISRC information from the TRM/SWCU117.  Output currents are adjustable and may be combined to achieve the desired total current.

Regards,
Ryan

Hi Ryan,

Thank you for your suggestion. https://software-dl.ti.com/lprf/sensor_controller_studio/docs/cc13x2_cc26x2_help/html/isrc__1.html#isrc-1-compaselectgpioinput , from this link 

compaEnableWithCapTouchRef();

compaSelectGpioInput(cfg.pAuxioAxdCapTouch[1]);

isrcEnable(BV_ISRC_CURR_0P25U);

isrcDisable();

compaDisable();
I wrote this lines into the static void SimplePeripheral_performPeriodicTask(void){} function, ı got the errors that attached the screenshot of them. And I could not find how to include them, is there any guide how to solve these problem?

To do this, I expect that generating 0.25uA on the first analog pin. Is that concept correct?   
Best Regards,

and is there a way to generate an adjustable constant current from the analog pin without using the sensor controller studio? I am quite new to embedded software, it would be nice for me to set up the system in the simplest way.

Hi Ryan, first of all thanks for your advice. Based on the various resources you suggested and found on the TI site, I spent quite a long time building the project using the Sensor controller, but I didn't feel like I was getting close.
I think it would be good to talk about the project I want to do. The aim of the project is to read ADC from an analog pin and send it via bluetooth and generate an adjustable current from an analog pin using the Simpleperipheral.c project. I have completed the process of reading ADC and sending it via bluetooth, my aim is to complete the process of generating current in a similar way without using Sensor Controller Studio. I have reviewed the documents you have sent and many documents about Sensor Controller studio, but unfortunately it is not very simple for a person who does not have much experience with embedded software to add them to the project I am using now. At the same time, I have not been able to find a document on how to add the project that I will produce using the Sensor controller to the project I have done so far.
In short, it would be better for me to generate adjustable current from an analog pin using only CCS. Can you refer me to another TI expert who can refer me to be able to do this?

Best Regards,

Hi Riza,

Refer to youtube video 2 and 3 of my blog post below. The SDK used was v3.30 so you need to adjust accordingly if you are using the latest SDK version.

https://markelthinkslearnscreates.wordpress.com/2022/08/23/bluetooth-soil-moisture-monitoring/

Maybe there is a way to generate current without using sensor controller. 

-kel

Hi Markel,

Your tutorial is well prepared and detailed. Do you plan make a similar tutorial about generating current like soil moisture example ? It would be perfect.

Best Regards,

Riza Gunes said:

Do you plan make a similar tutorial about generating current like soil moisture example

No. After you install the sensor controller studio there is a help button where there are sample codes which you can use.

What exactly is your intended application? Is this a school project?

-kel

No, CC2640 is going to be used with sensor which is designed by me. Two pins are going to use in this project. One of them is for ADC reading and another one is to generate consant current.

There is no TI Driver or Driverlib available for this peripheral, and the only ISRC register is associated with the Sensor Controller AUX.  Thus there are not any other options available.  The SimpleLink Academy Labs should be your greatest resource (alongside Markel's projects), I accidentally linked the CC13X2/CC26X2 example before but here is the Project from Scratch SLA for the CC2640R2F.

Regards,
Ryan