IWR1443: About GIO pull control

user244678

Part Number: IWR1443

Is pull control of GIO possible with IWR1443?
GIOPULDIS and GIOPSL registers of the following GIO pins
I switched, but the register settings are not reflected.

GIO_1(pin#N7,input) (GIOPULDIS,GIOPSL)=(0,1)
GIO_2(pin#N13,input) (GIOPULDIS,GIOPSL)=(0,1)
GIO_4(pin#R4,input) (GIOPULDIS,GIOPSL)=(0,0)
GIO_22(pin#P4,input) (GIOPULDIS,GIOPSL)=(0,0)

In swru522d.pdf, the following is described in section 17.3.1.
Does IWR1443 support GIO pull control?

swru522d.pdf 17.3.1:
Some devices may not support the programmable pull controls. In that case, the pull
disable and the pull select register controls will not work.

Best Regards,
Hiroyuki Taguchi

over 4 years ago

0 Akash Gondalia over 4 years ago

TI__Guru 50240 points

Hi Hiroyuki,

I've asked an expert to look into this and we should have an answer for you later this week.

Cheers,

Akash

0 user244678 over 4 years ago in reply to Akash Gondalia

Expert 1195 points

Hi Akash,

Please let me know the current situation.

Best Regards,
Hiroyuki Taguchi

0 Nitin Sakhuja over 4 years ago in reply to user244678

TI__Mastermind 30405 points

Hello,

Have you configured the Pin multiplexing registers to configure these pins for GPIO operation? The pin multiplexing for IWR1443 is defined in Table 4-2 of the device datasheet.

Please use TI's PinMux tool to generate the required pinmux configuration. You can refer to the Tutorial video provided on the Pinmux tool page to understand the process.

This tool generates C code for the selected pinmux configuration in 2 files: pin_mux_config.c and pin_mux_config.h

Referring to the IWR1443 Out of box demo in SDK 2.1.0.4, you can replace the existing pinmux configuration code in function MmwDemo_initTask in main.c with the new code generated by the pinmux tool.

Regards

-Nitin

0 user244678 over 4 years ago in reply to Nitin Sakhuja

Expert 1195 points

Hi Nitin,

Thank you for your reply.

Yes. Pinmux is already configured for GPIO operation.
As shown below, GPIO22 (P4) of IWR1443 is specified as input on PinMuxTool (cloud version).
At this time, there is no control to set pull-up or pull-down on the PinMuxTool screen.
Does this mean that IWR1443 cannot set pull-up or pull-down?
I think GPIO22 (R4) is pulled up by default.

Best Regards,
Hiroyuki Taguchi

0 CHETHAN KUMAR Y.B. over 4 years ago in reply to user244678

TI__Mastermind 25795 points

Hiroyuki Taguchi-san,

Please allow us couple of days to get back to you on this question.

Thanks and regards,

CHETHAN KUMAR Y.B.

0 CHETHAN KUMAR Y.B. over 4 years ago in reply to CHETHAN KUMAR Y.B.

TI__Mastermind 25795 points

Hiroyuki Taguchi-san,

IWR1443 GPIOs can set the pull up and pull down based on the pin mux configuration. While configuring the GPIO you need to be aware of Pull inhibit and PUll up and pull down selection bits.

For more details please refer to Technical reference Manual http://www.ti.com/lit/ug/swru522d/swru522d.pdf

GPIO_22 is mapped to P4 Ball this has pull up by default.

Thanks and regards,

CHETHAN KUMAR Y.B.

0 user244678 over 4 years ago in reply to CHETHAN KUMAR Y.B.

Expert 1195 points

Hi CHETHAN KUMAR Y.B.,

Thank you for your reply.

I understand that your answer is about the GPIO function of the SCI module.
Does this apply to the P4 pin (GPIO_22)?
According to the datasheet, the pinmux of the P4 pin is GPIO_22, MISO_2 and I2C_SCL.
If possible, could you give me specific register setting information?

Regards,
Hiroyuki

0 CHETHAN KUMAR Y.B. over 4 years ago in reply to user244678

TI__Mastermind 25795 points

Hiroyuki-san,

Yes, It should be applicable to P4 pin as well.

There are two parallel threads on similar topic. Let us continue the discussion on the below thread.

https://e2e.ti.com/support/sensors/f/1023/p/878534/3251537#3251537

Thanks and regards,

CHETHAN KUMAR Y.B.

0 user244678 over 4 years ago in reply to CHETHAN KUMAR Y.B.

Expert 1195 points

Hi CHETHAN KUMAR Y.B.,

Thank you for your reply.

>There are two parallel threads on similar topic. Let us continue the discussion on the below thread.
>e2e.ti.com/.../3251537

OK.
I close this thread.

Thanks and regards,
Hiroyuki

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IWR1443: About GIO pull control