tms320f2808: GPIO Interrupts

r c84546

Part Number: TMS320F2808

I want to generate an interrupt on a GPIO rising edge.

Is it correct to say that the only way to do this is to assign one of the 5 external interrupts to a GPIO?

This implies that the max number of GPIO interrupts is 5 as there are 5 external interrupts (XINT1..XINT5)

0 Hareesh Janakiraman over 7 years ago

Is it correct to say that the only way to do this is to assign one of the 5 external interrupts to a GPIO?

Yes. Only 3 external interrupts are supported in this device, however. Please refer SPRS230

0 Cody Watkins over 7 years ago

r c84546,

The eCAP module has interrupts, you could configure it to trigger on every rising edge.

The simplest way to do this is to configure the following:

Continuous mode
Cap 1 polarity to a rising edge.
Stop_Wrap = 0, this will reset the eCAP module after the first rising edge is detected.
Configure the CEVT1 interrupt.

I may have forgotten some small configuration details, but if you read through the ePWM users guide It should be pretty simple!

Let me know if you have any other questions!

Regards,
Cody

0 Cody Watkins over 7 years ago in reply to Cody Watkins

Has this issue been resolved? If not feel free to respond here. I will be closing this thread soon due to inactivity.

Regards,
Cody

C2000 microcontrollers forum