HCI_UART on THINGY:91

[Hoang]

Dear, 

I am trying to test BLE on the THINGY:91. 

Follow the Q&A for "Introduction to Nordic THINGY:91" webinar, Q12  of @Petter Myhre

I tried with Zephyr HCI UART example 

But, I couldn't find nrf52840_pca20035.overlay. From the schematic of THINGY:91, I created file: nrf52840_pca20035.overlay

/* SPDX-License-Identifier: Apache-2.0 */

/ {
	chosen {
		zephyr,bt-uart=&uart1;
	};
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <25>;
	rx-pin = <32>;
	rts-pin = <22>;
	cts-pin = <19>;
};

Then, 

use nRF91 DK to program for THINGY:91 (SW SELECT to nRF52) 

After programming, I couldn't find any serial port to connect to THINGY:91 anymore!!!

I tried to restart my computer and reset thingy:91, but the same problem. 

Did I do something wrong? How can I fix it?

Thanks so much 

Best Regards, 

Hoang Nguyen

[Hoang]

And, on the schematic of THINGY:91: MCU_IF: 

and, I check dts files:

nrf91: ncs_v1.0.0_joakim\nrf\boards\arm\nrf9160_pca20035\nrf9160_pca20035_common.dts#L165

&uart0 {
	current-speed = <115200>;
	status = "okay";
	tx-pin = <18>;
	rx-pin = <19>;
	rts-pin = <20>;
	cts-pin = <21>;
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <22>;
	rx-pin = <23>;
	rts-pin = <24>;
	cts-pin = <25>;
};

/* UART2 must be enabled for defines to be available for SPM. */
&uart2 {
	status = "okay";
};

nrf52840:  ncs_v1.0.0_joakim\nrf\boards\arm\nrf52840_pca20035\nrf52840_pca20035.dts#L39

&uart0 {
	compatible = "nordic,nrf-uarte";
	current-speed = <115200>;
	status = "okay";
	tx-pin = <15>;
	rx-pin = <11>;
	rts-pin = <21>;
	cts-pin = <20>;
};

&uart1 {
	current-speed = <1000000>;
	status = "okay";
	tx-pin = <25>;
	rx-pin = <32>;
	rts-pin = <22>;
	cts-pin = <19>;
};

UART0_nRF91 and UART0_nRF52 are matching ,

but 

UART1_nRF91 and UART1_nRF52: 

rx-pin = <32>;  but on the schematic nRF52_P1.00 

Is it correct ? I am confusing here.

Thanks, 

BR, 

Hoang Nguyen 

[Martin Lesund]

Hi Hoang,

From the nrf52840 pin config, you can see that p0.00 --> p0.31 and p1.00-->p1.15.
That means the following:

p0.30 ==> <30>

p0.31 ==> <31>

p1.00 ==> <32>

p1.01 ==> <33>

---

Here is the default boardcontroller on the Thingy91:
 thingy91_nrf52_usb_v0.2.2.hex

[Mattchew]

Hello,

Also trying to get the lte gateway working on the Thingy:91.

[Didrik Rokhaug]

Hi.

The nRF52840 on the Thingy:91 acts as a bridge between the UART and USB. However, that functionality is not present in the hci_uart sample. You can find the original firmware precompiled here: 

https://www.nordicsemi.com/Software-and-Tools/Prototyping-platforms/Nordic-Thingy-91/Download#infotabs

And you can find the source code on the master branch here:

https://github.com/NordicPlayground/fw-nrfconnect-nrf/tree/master/samples/usb/usb_uart_bridge

Best regards,

Didrik

[Mattchew]

Thank you for uploading the code Didrik.

I can get "samples/bluetooth/hci_uart" to compile if I copy the board folders from "ncs\nrf\boards\arm" to "ncs\zephyr\boards\arm". The BLE and uart still don't work, but it compiles.

It does get 2 warnings:

warning: BT_CTLR_DTM_HCI (defined at subsys/bluetooth/controller/Kconfig:365) was assigned the value
'y' but got the value 'n'. You can check symbol information (including dependencies) in the
'menuconfig' interface (see the Application Development Primer section of the manual), or in the
Kconfig reference at
http://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_BT_CTLR_DTM_HCI.html (which is updated
regularly from the master branch). See the 'Setting configuration values' section of the Board
Porting Guide as well.

warning: BT_CTLR_ASSERT_HANDLER (defined at subsys/bluetooth/controller/Kconfig:758) was assigned
the value 'y' but got the value 'n'. You can check symbol information (including dependencies) in
the 'menuconfig' interface (see the Application Development Primer section of the manual), or in the
Kconfig reference at
http://docs.zephyrproject.org/latest/reference/kconfig/CONFIG_BT_CTLR_ASSERT_HANDLER.html (which is
updated regularly from the master branch). See the 'Setting Parsing Kconfig tree in C:/Nordic_SDK/ncs/zephyr/Kconfig

Could we get the board info added to the git for Zephyr?

[Martin Lesund]

The code for the UART bridge on the nRF52840 on the Thingy is released: https://github.com/NordicPlayground/fw-nrfconnect-nrf/tree/master/samples/usb/usb_uart_bridge

[Hoang]

Thanks so much, Martin Lesund, 

I will try it soon

BR, 

Hoang Nguyen