# Interrupt error on using two VDMA

**URL:** <https://discuss.pynq.io/t/interrupt-error-on-using-two-vdma/2700>\
**Category:** Support\
**Created:** [May 26, 2021, 8:40am UTC](https://discuss.pynq.io/t/interrupt-error-on-using-two-vdma/2700 "2021-05-26T08:40:33Z")\
**Posts on this page:** 1\
**Showing post:** 3

<div class="post-metadata">

**Author:** ![mizan](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/mizan/32/2119_2.png) [@mizan](https://discuss.pynq.io/u/mizan)\
**Post date:** [May 27, 2021, 5:20am UTC](https://discuss.pynq.io/t/interrupt-error-on-using-two-vdma/2700/3 "2021-05-27T05:20:34Z")

</div>

both vdma connected to the pl\_ps\_irq[0] via a concat. If pin 1 of concat in is connected to vdma 1, it is working, vdma 2 is not working. If i connect vdma 2 to to pin 1, vdma 2 is working fine, vdma 1 not. If i use pl\_ps\_irq[1] for connecting any of the vdma, there is another error that doesn’t allow to initiate the overlay.

If i connect the pin 1 to other IP (In this case mipi rx), both vdma can’t be initiated. The only difference in the error is IRQ number, it shows both 122 and 123.

 ![image](https://us1.discourse-cdn.com/flex019/uploads/pynq1/original/2X/1/13f38505f0f7e37689f4ca26a140097a23a291a2.png)

---

_[View the full topic](https://discuss.pynq.io/t/interrupt-error-on-using-two-vdma/2700)._