nRF52840 Dongle with SX1276, Blink example doesn't Blink

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

Simonr — Thu, 08 Jun 2023 12:22:49 GMT

Hi again Flavio

Yes, that makes sense. I got mixed up since it was pins 13 and 15 used on both ports. As for why the nRF52840 Dongle doesn't run correctly, I'm afraid further debugging will be required. On the backside of the nRF52840 Dongle there is a 10 pin header footprint (P1) that you can solder a 10 pin debug header to and use to debug the device. Alternatively use the SWDIO and SWCLK pins near the USB header for debugging:

Most likely I assume it crashes somewhere in the LORA driver initialization and that's why you don't see it blink at all. If you're able to find an error code from a function or some debugging information at all we might be able to narrow it down.

Best regards,

Simon

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

FlavioPiracicaba — Tue, 06 Jun 2023 16:47:18 GMT

Hello Simon,

The spi is working well. I can send and receive spi commands.

The lines gpio0-13 and gpio0015 are used to connect the DIO of chip SX1276. These lines are not SPI. They are not mixed. If I compile the blink without these instructions on .prj the led blink because this I can conclude there isn't any problem with these wires.

These Lora Drivers are working very well on NRF53 with the same configurations. In fact I only took the blink example because is very basic. I only activated the the configs on prj. I am not calling any function.

Should blink, but is not blinking.

Thanks,

Flavio.

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

Simonr — Tue, 06 Jun 2023 12:11:46 GMT

As the LORA drivers are experimental I'm afraid we haven't done thorough testing and can guarantee that it will work on all of our products. I assume that you have double checked that all the pins are connected correctly to the Dongle in your project, and that none of the pins used for SPI is used for something else in your project causing conflicts?

Taking another look at your .overlay file it seems like you're mixing up the GPIOs P1.13 and P1.15. You've configured them to use Port 0 (P0.13 and P0.15) below, but to Port 1 further down and in your comments.

                 <&gpio0 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>, //DIO-0
                 <&gpio0 13 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; //DIO-1

Best regards,

Simon

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

FlavioPiracicaba — Mon, 05 Jun 2023 09:54:05 GMT

Hello Simon,

I used the original blink project and compiled for nRF52's dongle. I didn't change anything.

When I compiled and flashed worked. Led1 blinked.

When I added these lines on .prj without any extra code on main, compiled and flashed, didn't blink.:

CONFIG_SPI=y

CONFIG_LORA=y

CONFIG_LORA_SX12XX=y
CONFIG_LORA_SX127X=y
CONFIG_LORAWAN=y
CONFIG_LORAMAC_REGION_EU868=y
CONFIG_LORA_LOG_LEVEL_DBG=y
CONFIG_HAS_SEMTECH_RADIO_DRIVERS=y

Att,

Flavio

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

Simonr — Mon, 05 Jun 2023 09:02:04 GMT

Abhijith is out of office this week, so I'll handle this case for now. Sorry about the delays here, but there have been multiple public holidays in Norway the last few weeks. Thank you for your patience!

Just to make sure, the LED1 you refer to is the onboard LD1 on the Dongle, correct? This one is by default hardwired to GPIO P0.06, so have you configured this as a LED in your board/overlay file of your project? I can't see it anywhere in your uploaded files, so that might be why. This is how LEDs are configured in our nRF52840dongle_nrf52840.dts file:

leds {
		compatible = "gpio-leds";
		led0_green: led_0 {
			gpios = <&gpio0 6 GPIO_ACTIVE_LOW>;
			label = "Green LED 0";
		};
		led1_red: led_1 {
			gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
			label = "Red LED 1";
		};
		led1_green: led_2 {
			gpios = <&gpio1 9 GPIO_ACTIVE_LOW>;
			label = "Green LED 1";
		};
		led1_blue: led_3 {
			gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
			label = "Blue LED 1";
		};
	};

Best regards,

Simon

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

FlavioPiracicaba — Wed, 31 May 2023 11:47:49 GMT

Hello Abhihith,

Any news?

Thanks,

Flavio

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

FlavioPiracicaba — Fri, 26 May 2023 14:46:31 GMT

Hello Abhijith,

In this case I couldn't have a UART log because It's a dongle. I just save the .prj e the led didn't blink.

Thanks,

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

Menon — Fri, 26 May 2023 13:58:12 GMT

Hello,

Sorry this case slipped out of my queue after last Friday, due to the large inflow of cases as we were short staffed. I really appreciate that you responded which put your case back into my queue. I have started looking into this now.

Can you please share the UART log file to get a better insight of this issue?

Kind Regards,

Abhijith

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

FlavioPiracicaba — Fri, 26 May 2023 06:26:30 GMT

Ok. I am waiting.

RE: nRF52840 Dongle with SX1276, Blink example doesn't Blink

Menon — Fri, 19 May 2023 11:31:43 GMT

Hello,
I am sorry, but we are short staffed this week due to Public Holidays in Norway. We will be back on Monday 22nd and hope to be able to answer all incoming requests within a couple of days, depending on the backlog. I am sorry for the inconvenience.

Best regards,
Abhijith