nRF52832 use device of lis2dh, Failed to read chip id

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Mon, 17 Jul 2023 14:24:58 GMT

Hi,

That is strange, it doesn't look like I2C signals, the pins should initially be high and then SDA should go low before the SCLK line. Are you sure that you're measuring on the correct pins? Maybe the device that is connected is driving the pins somehow. Can you try to disconnect anything that is connected to the clock and data line and measure on them again?

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Sat, 15 Jul 2023 04:28:17 GMT

was the command executed incorrectly during initialization?

thankyou

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Sat, 15 Jul 2023 04:24:15 GMT

this is the signal of sda and scl at initialization

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Thu, 13 Jul 2023 08:30:28 GMT

Hi,

Do you have a logic analyzer?

Could you take a trace of the SDA and SCL line when you try to initialize the device?

I think for some reason either the slave sends a NACK during the initialization routine, or the Master does not send the correct sequence, a trace would show us what is happening,

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Sat, 08 Jul 2023 06:31:52 GMT

with debug at main,configuration is as follows,the i2c pins are correct

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Fri, 07 Jul 2023 13:21:34 GMT

Hi,

Yes with your custom dtsi and dts it would use P0.28 and P0.29, but using the standard nRF52832 LIS2DH sample I think it should use P0.26 and P0.27,

Either way, can you flash your custom code and try to read out the GPIO_PIN_CNF[n] for P0.28 and P0.29?

You can use nRF Command Line Tools for this:

Like this:

//For P0.28
nrfjprog --memrd 0x50000770

//For P0.29
nrfjprog --memrd 0x50000774

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Thu, 06 Jul 2023 15:35:53 GMT

the i2c of sample is using p0.28 and p0.29,Is this configuration of i2c not in effect？thank you

devzone.nordicsemi.com/.../decawave_5F00_dwm1001_5F00_dev.dts devzone.nordicsemi.com/.../decawave_5F00_dwm1001_5F00_dev_2D00_pinctrl.dtsi

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Thu, 06 Jul 2023 09:36:49 GMT

Hi,

The schematics shows that you're using P0.28 and P0.29 but the unmodified sample use P0.26 and P0.27. Did you modify the sample to fit your board? Can you share the dts file that you're using, and preferably your build folder as well?

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Wed, 05 Jul 2023 13:15:24 GMT

the i2c pins' schematic as follows

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Wed, 05 Jul 2023 07:42:55 GMT

Hi,

Have you modified the pins that the sample is using? Can you share the schematic of the module that you're using?

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Tue, 04 Jul 2023 16:18:51 GMT

where is the debug log?this is the error message:

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Tue, 04 Jul 2023 08:16:41 GMT

Hi,

Ok, so you're not able to run the unmodified lis2dh sample on your board?

Have you checked the log? What error message do you get?

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Mon, 03 Jul 2023 16:36:32 GMT

it's also Unable to initialize：

The pins of both sda and scl have no signal change and keep low level

RE: nRF52832 use device of lis2dh, Failed to read chip id

Jared — Mon, 03 Jul 2023 09:10:33 GMT

Hi,

I'll be taking over this case as Håkon is out-of-office,

[quote user="psencao"]only use the lis2dh application,can't Initial start with no log，add the lis2dh device to beacon application,found the i2c error.[/quote]

Can you clarify if the standard unmodified LIS2DH sample works on your board? This means without merging it with the beacon sample?

Have you modified the pins that are used in the sample, if so what pins are you using?

regards

Jared

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Sun, 02 Jul 2023 15:11:20 GMT

The pins of both sda and scl have no signal change and are always low，the

compatible of i2c configure as twi or twim，it's the same error log

RE: nRF52832 use device of lis2dh, Failed to read chip id

helsing — Fri, 30 Jun 2023 13:37:20 GMT

Thank you for the additional information. If you are able to probe the pins to look for activity it would speed up the search for the error. I will in any case look for other possible ways to find the error.

RE: nRF52832 use device of lis2dh, Failed to read chip id

psencao — Wed, 28 Jun 2023 17:17:22 GMT

devzone.nordicsemi.com/.../a_5F00_beacon.zipthe version of ncs is v2.2.0。only use the lis2dh application,can't Initial start with no log，add the lis2dh device to beacon application,found the i2c error.

the board is dwm1001 dev,The pin has been configured as follows:

prj.conf:

.dts:

main.c:

the rttlog：

does the project have a log saved during debugging?

i use the nRF5_SDK_16.0.0 to control the lis2dh and it's normal

thank you

RE: nRF52832 use device of lis2dh, Failed to read chip id

helsing — Wed, 28 Jun 2023 12:56:11 GMT

Could you please also post the complete log file?

RE: nRF52832 use device of lis2dh, Failed to read chip id

helsing — Wed, 28 Jun 2023 12:48:21 GMT

Hi psencao,

Have you performed any measurements on the I2C lines? Is there any activity on the lines? Do you have access to an oscilloscope?

Would you be able to share some details regarding your project? Which board are you using, is it the nRF52840 DK or a custom board? How is the sensor connected? Which pins are you using? Could you please share your overlay or some project files?