TMS320F2800155: Regarding the DAC availability in piccolo controllers

kindly please help me trough it

Hi Muntaha,

Thanks for your patience.

On F280015x family devices, only one instance of CMSS has the DAC can be brought on the pin. 

As you can see, the CMPx_DACL is the output of DAC on the pin. You can check the device data manual to see which pin is connected. Please check "Table 11-3. Analog Pins and Internal Connections" in TRM.

There are two examples in C2000ware directory showing how to use CMPSS. You can find them here:

ti\c2000\C2000Ware_5_0x_00_00\driverlib\f280015x\examples\cmpss

I recommend you to use SYSCONFIG GUI to easily configure the device. To enable the DAC, you need to check the box here in ASYSCTL.

Regards,

Hadi

I saw the example code where DAC ouput is used with CMPSS..I want help in understanding in how to used without CMPSS..

My requirement is when I give suppose 2.1 i should get it on the DAC pin 2.1...and so on

You just need to enable the CMP1_DACL (as I explained before) and then set the dac value on CMPSS module, shown in following figure.

I want to do it dynamically...

as i have to pass this value through CAN and then continuously change the value

I have generated duty cycle for the generating PWM...which will be going to the IC..for that i need to dynamically change the DAC which should go to the PWM IC...Kindly please help me through it..

You need to use this function to update the DAC value: