awr1243：Is the IRQ operation of AWR1243P different from IRQ of AWR1243?

Hi,

I will follow up with the team with respect to any differences between AWR1243 and AWR1243P.

To understand the phenomenon,  can you please highlight where in the sequence below you are getting stuck?

At AWR boot, you should enter the Bsp_ar12xxGpioIsr,

In the ISR context the function Bsp_ar12xxRadarTaskPost is called

The queue is populated with the device ID which would invoke a context switch to Bsp_ar12xxRadarDevTask

In this task, the mmwavelink APIs would first send the CNYS pattern on SPI. On receiving this the AWR would pull the host interrupt low.

The signal level communication is as shown here:

Do you see the CNYS pattern been sent out from TDA?

Thanks and Regards,

Piyali

Thank you for your reply

I am developing with reference to the following figure.

It seems that it is different from the one you presented.

Was the first dummy communication omitted in AWR1243P?

Please answer

P.S We will use SDK 3.01 in the future, but at this stage we can only deal with SDK 2.12.

Hi Takahashi-san,

Thank you for the information!

As another experiment, you can try to lower the SPI clock frequency from the TDA to test if the SPI communication fails even with a lower frequency.

In order to change the frequency, you would need to modify:

PROCESSOR_SDK_RADAR_02_12\vision_sdk\src\utils_common\src\utils_mcspi.c

Line : mcspiCfgPrms.spiHWCfgData.configChfmt[i].busFreq           = 8000000;

Right now the frequency is set to 8 MHz. Can you please try changing this to 800 KHz and 80 KHz in two experiments to see if the SPI communication is sucessful.

I understand the TIJ team is supporting you in this issue. Please do let me know if this experiment has already been tried. 

Thanks and Regards,

Piyali

Hi Takahashi-san,

Thanks for the information!

If the MOSI line is not toggling to give the CNYS pattern that could explain why the host interrupt from the AWR12 does not go low. (AWR1243 keeps waiting for the CNYS pattern).

We would need to analyze why the TDA MOSI line is not toggling.

Can you please check the values of the registers below from the TDA3 CCS memory view?

0x4a0035a4 - PAD_SPI2_SCLK

0x4a0035a8 - PAD_SPI2_D1

0x4a0035Ac - PAD_SPI2_D0

0x4a0035B0 - PAD_SPI2_CS0

BTW in the software when you call

/* Set the McSPI pin Mux */

   Bsp_boardSetPinMux(BSP_DRV_ID_MCSPI, BSP_DEVICE_MCSPI_INST_ID_1, BSP_BOARD_MODE_DEFAULT);

for SPI2 the connection is the following:

Is this the same for you?

The fact that the MOSI voltage drops to 1 V seem to suggest two devices are driving the same line.

Thanks and Regards,

Piyali

Dear Piyali

I will describe the memory of SPI pin.

Thanks and Regards,

Takahashi

Dear Piyali

Previously, MOSI and MISO said they are outputting 3V. However, they seem to be output from the MMIC.
So it seems like you will not accept signals from TDA side.

Thanks and Regards,
Takahashi