AWR1843: SPIPC7 and SPIPC8 registers

Kensuke

Part Number: AWR1843

Hi,

There seems to be SPIPCn register from SPIPC0 to SPIPC9, but the description of SPIPC7 to SPIPC9 does not exist in the TRM (SWRU520C).

Is there any document that explains SPIPC7 to SPIPC9?

I need these information because TRM "23.2.11.1 Compatibility (SPI) Mode Configuration" does not describe SPIPC8 configuration, but it seems necessary.

over 5 years ago

0 Jitendra Gupta over 5 years ago

TI__Guru 69960 points

Hi Kensuke,

SPIPC7 and SPIPC8 registers are not available in the list for SPI peripheral of this device, SPIPCn [n=0 to 6 and 9].

And SPIPC9 description is present in TRM (please search for it).

May I know what is your purpose to look for these registers. mmWave SDK SPI driver provides all register usage under specific usage.

Regards,

Jitendra

0 Kensuke over 5 years ago in reply to Jitendra Gupta

Expert 1140 points

Hi Jitendra,

Thank you for your prompt reply.

mmWave SDK SPI driver sets SPIPC7 and SPIPC8 registers.

C:\ti\mmwave_sdk_03_01_00_02\packages\ti\drivers\spi\src\mibspi_dma.c

line.538

    /*  SPIPC7 Register: Set Port Pullup/Pulldown control: 0 to enable, 1 to disable  */
    ptrMibSpiReg->SPIPC7 = 0U;

    /*  SPIPC8 Register: Set Port Pullup/Pulldown value: 0 to pulldown, 1 to pullup  */
    ptrMibSpiReg->SPIPC8 =  CSL_FMKR(0U, 7U, 0xFFU) |
                         CSL_FMKR(8U, 8U, 1U) |
                         CSL_FMKR(9U, 9U, 1U) |
                         CSL_FMKR(10U, 10U, 1U) |
                         CSL_FMKR(11U, 11U, 1U);

I am using MibSPI in SPI mode.

However, if 0x01010F01 is not set in the SPIPC8 register, the received data cannot be come into RXBUF register.

Therefore, I think that setting to the SPIPC8 register is necessary.

That is why I want to know the detailed register specifications.

0 Jitendra Gupta over 5 years ago in reply to Kensuke

TI__Guru 69960 points

Hi,

These registers to set the pull up/down control to SPI.

SPIPC7: set 0 to enable pullup/down control; each bit for each of SPIPC.

SPIPC8: set 1 to pullup for each of port.

Could you specify why and how you are using MibSPI in SPI mode?

Regards,

Jitendra

0 Kensuke over 5 years ago in reply to Jitendra Gupta

Expert 1140 points

Hi Jitendra,

To minimize footprint of BSP (we have not used mmwaveSDK).

We use SPI mode to control CAN transceiver.

0 Kensuke over 5 years ago in reply to Kensuke

Expert 1140 points

Hi Jitendra,

In conclusion, is it necessary to set the SPIPC7 / 8 register in SPI mode?

How should I set it if necessary?

0 Jitendra Gupta over 5 years ago in reply to Kensuke

TI__Guru 69960 points

Hi,

You can use the same way as used in the given MibSPI driver.

Regards,

Jitendra

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AWR1843: SPIPC7 and SPIPC8 registers