Issue: CONFIG_ACCEL_CALIBRATE is NOT generated for PCA20035

[Dheeraj]

Hi, 

I would like to read accelerometer value from orientation_detector_calibrate()  (in asset_tracker/src/orientation_detector/orientation_detector.c). 

But from main.c (in asset_tracker/src/main.c). it has a dependency on "CONFIG_ACCEL_CALIBRATE", which is defined like below. 

#ifdef CONFIG_ACCEL_USE_SIM
#define FLIP_INPUT CONFIG_FLIP_INPUT
#define CALIBRATION_INPUT -1
#else
#define FLIP_INPUT -1
#ifdef CONFIG_ACCEL_CALIBRATE
#define CALIBRATION_INPUT CONFIG_CALIBRATION_INPUT
#else
#define CALIBRATION_INPUT -1
#endif /* CONFIG_ACCEL_CALIBRATE */
#endif /* CONFIG_ACCEL_USE_SIM */

After some debugging, I got to know that, these CONFIG_ macro values should be automatically generated and must be in "ncs\nrf\applications\asset_tracker\build\zephyr\include\generated\autoconf.h" 

But unfortunately, I didn't see them in "autoconf.h" for the PCA20035 thingy91    (west build -b nrf9160_pca20035ns) device. 

Please guide me the correct way to get generate them in order to access the orientation detector

Thank you. 

[Håkon Alseth]

Hi,

 

Those defines are related to a accelerometer that were used on prototypes of the thingy:91, and is not used for the finalized version, were you needed to calibrate it regularly.

Thank you for letting us know about this, I'll make sure that the developers remove unused defines/kconfig entries.

 

Kind regards,

Håkon

[Dheeraj]

No problem. Even I figured it out, how to read/calibrate the accelerometer values. 

Could you please let me know, how can I interact with nRF52840 from nRF9160 on Thingy91 (PCA20035) device. 

Basically, I would like to know the interface between the nRF52840 ad nRf9160 on the  (Thingy91) PCA20035 device. 

Thank you. 

[Håkon Alseth]

Dheeraj said:

Basically, I would like to know the interface between the nRF52840 ad nRf9160 on the  (Thingy91) PCA20035 device. 

The nRF52840 is made to serve the nRF9160 in terms of UART/USB connections, and to be able to program the nRF9160 device over UART as well (using mcuboot)

The physical interface between the two nRF's are a set of GPIOs, and they are used for UART communication (RXD, TXD, CTS, RTS). What specifically are you looking for?

 

Kind regards,

Håkon

[Dheeraj]

Hi,

Thanks for your reply.

I am specifically looking for RSSI implementation using the BLE module on nrf52840 SOC. How to obtain the RSSI values for asset tracker application on Nordic Thingy:91(nRF9160 SiP)?

I want to perform a BLE scan based on the timeout values and sort the result by RSSI implementation with nRF52840 for PCA20035 and pass the BLE_SCANLIST_ENTRIES over UART.

Looking forward to your help. Please guide me the correct way and let me know how to proceed to start the RSSI measurement.

Thanks

[Håkon Alseth]

Dheeraj said:

I am specifically looking for RSSI implementation using the BLE module on nrf52840 SOC. How to obtain the RSSI values for asset tracker application on Nordic Thingy:91(nRF9160 SiP)?

 In order to use the BLE part of the nRF52840 SoC on the thingy:91 board, you'll have to reprogram the nRF52840 with hci_uart, then run lte_ble_gateway on nRF9160 device, but; this will cause the USB-UART bridge to be overwritten. We do not have an example that combines the usb_uart + hci_uart sample, unfortunately; but I have provided this feedback to the thingy:91 team so that they are aware of this scenario.

 

Kind regards,

Håkon

[Dheeraj]

Hi Hakon, 

As suggested, I have compiled hci_uart for nrf52840_pca20035 and lte_ble_gateway for nrf9160_pca20035ns. and flashed the respective Images by using nRF9160 DK (PCA10090) on Thingy91.

After flashing the above Images, I am NOT able to observe any logs from Thingy91. 

I have tried reconnecting the board by disconnecting the USB, but still, the system is NOT able to detect the Thingy91 Ports (COM).

I have tried adding the DTS overly files for hci_uart, but no luck. 

Please help me out, how can I get it done as this is a roadblock for me.  

For your info: 

I have tried the same on nRF9160 DK (10090), I am able to get the RSSI values from nRF52840 SoC to nRF9160 SiP without any issues. 

Thank you.

[Håkon Alseth]

Dheeraj said:

As suggested, I have compiled hci_uart for nrf52840_pca20035 and lte_ble_gateway for nrf9160_pca20035ns. and flashed the respective Images by using nRF9160 DK (PCA10090) on Thingy91.

After flashing the above Images, I am NOT able to observe any logs from Thingy91. 

I have tried reconnecting the board by disconnecting the USB, but still, the system is NOT able to detect the Thingy91 Ports (COM).

I have tried adding the DTS overly files for hci_uart, but no luck. 

Please help me out, how can I get it done as this is a roadblock for me.  

For your info: 

I have tried the same on nRF9160 DK (10090), I am able to get the RSSI values from nRF52840 SoC to nRF9160 SiP without any issues. 

When you flash hci_uart to the nRF52840 on the thingy, you will overwrite the firmware already present on it, and you will lose the USB-UART bridge functionality.

You can try to use Segger RTT to get print out, via the SWD debug interface, by adding this line:

CONFIG_USE_SEGGER_RTT=y

 

Kind regards,

Håkon

[Dheeraj]

Hi Hakon, 

I understand.

Could you please let me know, where can I find the USB-UART bridge code changes to reflash the nRF52840 on Thingy91 (PCA20035) to bring back to Normal. 

Due to this, I did NOT get the nRF9160 SiP logs as well. 

Thank you.