What interrupt value does the ADC C280x/C2833x post at the EOC?

I'm using the C280x/C2833x ADC block in Matlab/Simulink's Embedded Coder. I want to use the end of conversion interrupt to trigger a different subsystem from a hardware interrupt block. This task means I must know which interrupt this block is posting to at the EOC.

I'm using the TI chip TMS320F28335. There are three interrupts associated with the ADC: SEQ1INT, SEQ2INT, and ADCINT. Unfortunately, I haven't gotten any to work yet. maybe there is one more step in the process, but I want to nail down which interrupt is being used in the first place.

I think that the ADC block will post an interrupt at the end of conversion to ADCINT, which is INT1.6.

Does anyone know if this assumption is correct?

Thanks.

Answer 1

[Antonin]

Hi Jonathan,

If using module A on the ADC block, the interrupt triggered is SEQ1INT (1.1 in the PIE).

If using module B on the ADC block, the interrupt triggered is SEQ2INT (1.2 in the PIE).

If using module A and B on the ADC block, the interrupt triggered is SEQ1INT (1.1 in the PIE).

The ADCINT at 1.6 in the PIE has been kept for code compatibility with the older F281x devices. I don't recommend using it as it only provides redundant capabilities compared to SEQ1INT and SEQ2INT.

A good example where both are used is the dual motor control example c28035pmsmfocdual. It's not exactly the same device as 28335, but you will get the idea.

I hope it helps,

Thanks,

Antonin.

[Ahmed Khamis]

Hi After setting the EOC interrupt for module A as SEQ1INT (1.1 in the PIE), and setting the ADC prescalars to run at 25 MHz, a simple GPIO_0 output that toogles when interrupt is called doesn't follow the speed setting of the ADC.