IWR6843AOP: IWR6843

Or Ben Zion

Part Number: IWR6843AOP
Other Parts Discussed in Thread: IWR6843

Tool/software:

Hi,

I'm trying to connect the IWR6843 to ESP32 microcontroller using SPI, and i'm getting a very strange behavior. I'm using TI as master and i even lowered the bit rate to 1KHz trying to debug this issue.
when using

when csHold=0 i'm seeing the clock running without CS activation.

with csHold = 1 i'm also getting a lot of errors

I've tried different frameFormat and also using the another gpio as the CS signal which give for now the best results.

but from some reason I need to use different frameFormat for the Master (TI-IWR6843) and the Slave, this is the only way i can get some communication through. [

(master) SPI_POL0_PHA1 (slave) SPI_POL0_PHA0] and I know i'm not supposed to this as this is a bad practice but this the only way it works.

I will thank you for your help, maybe i'm configuring something wrong.

Thanks in advance

Or Ben Zion

SPI bus configuration is

/* SPIA_MOSI */

Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PIND13_PADAD, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);

Pinmux_Set_FuncSel(SOC_XWR68XX_PIND13_PADAD, SOC_XWR68XX_PIND13_PADAD_SPIA_MOSI);

/* SPIA_MISO */

Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE14_PADAE, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);

Pinmux_Set_FuncSel(SOC_XWR68XX_PINE14_PADAE, SOC_XWR68XX_PINE14_PADAE_SPIA_MISO);

/* SPIA_CLK */

Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE13_PADAF, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);

Pinmux_Set_FuncSel(SOC_XWR68XX_PINE13_PADAF, SOC_XWR68XX_PINE13_PADAF_SPIA_CLK);

/* SPIA_CS */

Pinmux_Set_OverrideCtrl(SOC_XWR68XX_PINE15_PADAG, PINMUX_OUTEN_RETAIN_HW_CTRL, PINMUX_INPEN_RETAIN_HW_CTRL);

Pinmux_Set_FuncSel(SOC_XWR68XX_PINE15_PADAG, SOC_XWR68XX_PINE15_PADAG_SPIA_CSN);

over 1 year ago

0 Santosh Krishnan over 1 year ago

TI__Mastermind 19500 points

Hello.

Thank you for your patience. I am looking into this and will provide a response by the end of the day tomorrow.

Sincerely,

Santosh

0 Or Ben Zion over 1 year ago in reply to Santosh Krishnan

Prodigy 20 points

Hi Santosh,

Thanks for the response. Is there any progress on the issue?

Thanks,

0 Josh Dye over 1 year ago in reply to Or Ben Zion

TI__Mastermind 20881 points

Hi Or,

I apologize for the delay here. Your pinmux settings appear to be correct. We need more time to look into this issue. Also, can you please share the SDK version used as well as any example you've based your code off of?

Best Regards,

Josh

0 Or Ben Zion over 1 year ago in reply to Josh Dye

Prodigy 20 points

Hi, Sorry but the logic analyzer was not configured correctly (1.2V instead of 3.3V). But I still have an issue (not the CS).

I'll open another issue with the relevant screenshots and description.

0 Or Ben Zion over 1 year ago

Prodigy 20 points

the new issue i opened

Sensors forum - Sensors forum - Sensors - TI E2E support forums

0 Josh Dye over 1 year ago in reply to Or Ben Zion

TI__Mastermind 20881 points

Hi Or,

Thanks for letting me know this issue is resolved. You should receive a response on your new post sometime today.

Best Regards,

Josh