AWR1843BOOST: HELP

mars down

Part Number: AWR1843BOOST

hi，Is it possible to communicate radar information to another MCU via SPI instead of using DCA1000, aiming for a transmission rate of 100Mbps? Is this feasible?:)

8 months ago

0 aozer 8 months ago

TI__Mastermind 26925 points

Hello,

Yes, you can communicate with another MCU using SPI. The SPI data rate is 40MHz. We provide the schematics online, you can review the schematics and see how which header pins the SPI is brought out on.

The raw data is sent over LVDS interface. If you want to send the raw radar data, your MCU must also support LVDS. The details of this interface can be found in the TRM and datasheet.

Regards,

Adrian

0 mars down 8 months ago in reply to aozer

Prodigy 20 points

Hello, I would like to inquire whether the radar's raw data must be acquired through the LVDS protocol, or can it be transmitted via SPI communication on the J5J6 connector? :(

0 mars down 8 months ago in reply to aozer

Prodigy 20 points

The HD connector for LVDS/CSI and JTAG interface is too large for my device.(sad

0 mars down 8 months ago in reply to aozer

Prodigy 20 points

Because I see that the SPI on J5J6 and the LVDS interface share the same SPIA.

0 aozer 8 months ago in reply to mars down

TI__Mastermind 26925 points

Hello,

No, raw ADC data can only be sent over LVDS interface.

You could send the processed point cloud data over SPI, is that sufficient for you?

Regards,

Adrian

0 aozer 8 months ago in reply to aozer

TI__Mastermind 26925 points

Here is an example for 68xx that enables point cloud data over SPI (link will expire in 7 days).

https://tidrive.ext.ti.com/u/iqlWE2gpVmuYqVYV/1e2da1aa-25b5-4add-94cb-ff3c06f730b8?l

passcode: x7xK1T[M

You can start with this and port it over to 18xx if you need the pointcloud data over SPI.

Regards,

Adrian

0 mars down 8 months ago in reply to aozer

Prodigy 20 points

Thanks！AND may I ask what is the difference between the processed point cloud data that can be transmitted via SPI and the original ADC data?

0 Josh Wyatt 8 months ago in reply to mars down

TI__Guru* 91206 points

Dear Mars -

A point cloud is a list of points in either cartesian or spherical coordinates which represent the detections from the sensor, whereas the raw ADC values are just that (raw data) - and which are sent at much higher speeds than what is possible over SPI.

See this page, go to right side and click on ADC Data, then Point Cloud, to learn more.

https://dev.ti.com/tirex/explore/node?node=A__AUAJwr4zBXhyz-M3VG2cUg__RADAR-ACADEMY__GwxShWe__LATEST

0 mars down 8 months ago in reply to Josh Wyatt

Prodigy 20 points

Thank you for your response. I have another question: Is the reason why ADC raw data can only be transmitted through the LVDS interface due to transmission rate limitations, or is it only achievable through the LVDS interface for output? If it's the former, can the output through other interfaces like the SPI interface be achieved by lowering the transmission rate of radar data?

0 aozer 8 months ago in reply to mars down

TI__Mastermind 26925 points

Hello,

It is due to the bandwidth limitations. ADC data requires a high speed interface which operates at several hundred Mbps. You can calculate the required data rate based on your configuration, I recommend to try searching the forums as the throughput requirements have been discussed here before.

Regards,

Adrian

0 mars down 8 months ago in reply to aozer

Prodigy 20 points

Thanks for your help

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AWR1843BOOST: HELP