# DMA for float array

**URL:** <https://discuss.pynq.io/t/dma-for-float-array/3746>\
**Category:** Support\
**Created:** [February 25, 2022, 5:28pm UTC](https://discuss.pynq.io/t/dma-for-float-array/3746 "2022-02-25T17:28:55Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![marioruiz](https://sea1.discourse-cdn.com/flex019/user_avatar/discuss.pynq.io/marioruiz/32/2177_2.png) [@marioruiz](https://discuss.pynq.io/u/marioruiz)\
**Post date:** [February 26, 2022, 12:26pm UTC](https://discuss.pynq.io/t/dma-for-float-array/3746/2 "2022-02-26T12:26:46Z")

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Hi @Pynq_userrrr,

You may want to have a look at Cathal’s DMA tutorial [Tutorial: using a HLS stream IP with DMA (Part 1: HLS design)](https://discuss.pynq.io/t/tutorial-using-a-hls-stream-ip-with-dma-part-1-hls-design/3344)

Regarding your issue, I do not see the code to star the HLS IP.

> [@Tutorial: using a HLS stream IP with DMA (Part 3: Using the HLS IP from PYNQ)](https://discuss.pynq.io/t/tutorial-using-a-hls-stream-ip-with-dma-part-3-using-the-hls-ip-from-pynq/3346#start-the-hls-ip-8):
>
> Introduction This part of the tutorial will show how to use a HLS IP we created earlier with PYNQ. [Part 1](https://discuss.pynq.io/t/tutorial-using-a-hls-stream-ip-with-dma-tutorial-part-1-hls-design/3344) showed how to create the HLS IP and [Part 2](https://discuss.pynq.io/t/tutorial-using-a-hls-stream-ip-with-dma-tutorial-part-2-vivado-design/3345) showed how to create the hardware design. The source document for these instructions is a Jupyter Notebook. You can find it on the GitHub repository linked below. The notebook can be copied to your board and the code cells can be executed to test the design created in the previous steps. Sources [HLS stream tutorial GitHub repository](https://github.com/cathalmccabe/PYNQ_tutorials/tree/master/dma_hls_axis) (includes th…

You may also want to review the documentation about the pipeline directive, and the concept of Initiation Interval (II). Vitis HLS should be returning a warning in regards to this directive `#pragma HLS PIPELINE II=0`.

Mario

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