IWR1642: How to enable the SYNC_OUT on IWR1642

Wesley He

Part Number: IWR1642
Other Parts Discussed in Thread: IWR6843

Hello team,

Customer wants to sync 2x IWR1642 chirp's start time(not the cascade, just sync the start time), they want to use the SYNCOUT from master and provide it to slave device, but after setting the PINMUX of SYNC_OUT, there's no signal on SYNC_OUT pin. What we need to do to enable the SYNC OUT signal?

Thanks.

The code that i had tested to enable SYNC OUT feature is listed below.

Pinmux_Set_OverrideCtrl(SOC_XWR16XX_PING13_PADBC, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);
Pinmux_Set_FuncSel(SOC_XWR16XX_PING13_PADBC, SOC_XWR16XX_PING13_PADBC_SYNC_OUT);

over 5 years ago

0 Charles Oladimeji over 5 years ago

TI__Mastermind 33805 points

Hi Wesley,

Please see linked post

https://e2e.ti.com/support/sensors/f/1023/t/773333?IWR1642-Availability-of-SYNC-OUT

https://e2e.ti.com/support/sensors/f/1023/t/785953?tisearch=e2e-sitesearch&keymatch=sync_out

Please let me know if it helps.

BR,

Charles O

0 Wesley He over 5 years ago in reply to Charles Oladimeji

TI__Expert 6205 points

Hello Charles,

The PINMUX cannot take the SYNC_OUT signal output. Can you please help to check with BSS team, if the BSS had output the SYNCOUT signal on IWR1642 & IWR6843?

Thanks.

Wesley

0 zigang Yang over 5 years ago in reply to Wesley He

TI__Mastermind 40025 points

Hi, Wesley:

TO achieve frame sync. Clockout on Master sensor is connected to the frame sync in on the Slave sensor.

Below is the pin for clockout and sync in

Best,

Zigang

0 Wesley He over 5 years ago in reply to zigang Yang

TI__Expert 6205 points

Hello Zigang,

I had called the pinmux function in mss code, to set both SYNCOUT and MCUCLKOUT pin function.

But, nothing happen, i cannot measure the pulse on these 2 pin that sync with frame.

Can you please help to clarify how to enable this pin function?

The code I used to initial the pinmux feature is listed below:

    Pinmux_Set_OverrideCtrl(SOC_XWR16XX_PING13_PADBC, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);
    Pinmux_Set_FuncSel(SOC_XWR16XX_PING13_PADBC, SOC_XWR16XX_PING13_PADBC_SYNC_OUT);

    Pinmux_Set_OverrideCtrl(SOC_XWR16XX_PINN8_PADAY, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);
    Pinmux_Set_FuncSel(SOC_XWR16XX_PINN8_PADAY, SOC_XWR16XX_PINN8_PADAY_MCU_CLKOUT);

Thanks,

Wesley

0 zigang Yang over 5 years ago in reply to Wesley He

TI__Mastermind 40025 points

HI, Wesley:

It is quite hard to measure the syncOut. I tried before for interference mitigation demo, and could not get it measured. But it actually work (do not use a long cable though). Can you try it on the slave radar to see any reaction? I have never did it myself, I will try to find some expert to help.

Below is a picture of my previous setup for your reference.

Best,

Zigang

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IWR1642: How to enable the SYNC_OUT on IWR1642