NRF528540 with MPU9255 Problem

RE: NRF528540 with MPU9255 Problem

kyle.ng1 — Sun, 09 Oct 2022 13:16:02 GMT

Hello Edvin,

I have changed the pin out of SDA and SCL it worked normally thank for your support

Best Regard,

Kyle.

RE: NRF528540 with MPU9255 Problem

Edvin — Fri, 07 Oct 2022 09:16:58 GMT

Hello Kyle,

[quote user="kyle.ng1"]i have built 1 project before to test the response of TWI it's work normally,[/quote]

Does the TWI from the nRF work normally, or does the TWI on the MPU work normally?

The screenshot of the log in your last reply, is that from the SDK\examples\peripheral\twi_scanner example, or is it from your nrf5-mpu-simple application?

Either way, it suggests that no TWI devices are connected correctly. At least not that the nRF can see.

Did you try to analyze the TWI bus using a logic analyzer? Does the MPU send a reply?

BR,
Edvin

RE: NRF528540 with MPU9255 Problem

kyle.ng1 — Thu, 06 Oct 2022 13:28:42 GMT

Hello,

This is my main.c file devzone.nordicsemi.com/.../7506.main.c

The MPU was powered and i have built 1 project before to test the response of TWI it's work normally, but the init of MPU is fail, idk why?

Best regards,

Kyle

RE: NRF528540 with MPU9255 Problem

Edvin — Thu, 06 Oct 2022 12:01:04 GMT

Hello,

Can you please send me the main.c file (your latest version) with the corresponding error log. The log would not say what it says if your line 35 is ret_code_t = app_mpu_config(...).

mpu_init() doesn't return any parameters (at least not in the unmodified nrf5-mpu-init\main.c file).

But I guess it is app_mpu_config() that returns 13, then. If that is the case, it looks like the nrf_drv_mpu_write_registers() returns NRF_ERROR_TIMEOUT, meaning that nrf_drv_twi_xfer() doesn't receive a callback. Is the MPU powered? Have you tried to analyze the TWI pins using a logic analyzer? Is the TWI data sent from the nRF? And does the MPU reply over TWI?

Best regards,

Edvin

RE: NRF528540 with MPU9255 Problem

kyle.ng1 — Wed, 05 Oct 2022 15:55:47 GMT

Hello Edvin,

The line 35 in my main.c is ret_code = app_mpu_config(&p_mpu_config); // Configure the MPU with above values

The function that return error 13 is the mpu_init function.

I'm using segger embedded studio but i'm already add the preprocessor definitions MPU9255 and MPU_USES_TWI.

Best regards,

Kyle

RE: NRF528540 with MPU9255 Problem

Edvin — Mon, 03 Oct 2022 09:50:16 GMT

Hello,

Line 35 in main.c in the nrf5-mpu-simple application is just a comment, so obviously you did some modifications, at least removed the comments on the top.

What function returned the error 13 that was passed into your APP_ERROR_CHECK(err_code) in main.c on line 35?

Are you using Keil? Did you add the preprocessor definitions MPU9255 and MPU_USES_TWI to your project settings, according to the readme file in the github repository that you linked to?

Best regards,

Edvin