nRF52840 Dongle with SX1276, Blink example doesn't Blink

[FlavioPiracicaba]

I successfully installed a SX1276 with a nRF5340 and transmitted some lorawan packets to Helium Network.

After I concluded I could do the same using the nRF52840. So I installed another one module solded on dongle's pin.

In order to start this project I created the blink to know if the things were working. The led1 blinked.

After I just adjusted the .overlay and organized the pins, at same way I done using the other project.

And I put some lorawan configs on .prj.

For my surprise, the led didn't blink.

In order to test, doesn't need connect anything because the problem is only the configs.

This is the original blink project, added innocuous commands:

/*
 * Copyright (c) 2016 Intel Corporation
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>

#include <zephyr/device.h>
#include <zephyr/lorawan/lorawan.h>

#include <zephyr/drivers/lora.h>

#include <soc.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>


#include <zephyr/types.h>
#include <zephyr/kernel.h>
#include <zephyr/drivers/uart.h>

#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/adc.h>
#include <zephyr/usb/usb_device.h>


/* Customize based on network configuration */


#define LORAWAN_DEV_EUI_HELIUM  {0x60, 0x81, 0xF9, 0x44, 0x0A, 0xFD, 0x54, 0x56} //msb
#define LORAWAN_JOIN_EUI_HELIUM {0x60, 0x81, 0xF9, 0x82, 0xBD, 0x7F, 0x80, 0xD3} //msb
#define LORAWAN_APP_KEY_HELIUM  {0x40, 0xA3, 0x4B, 0x94, 0x3E, 0x86, 0xD8, 0x38, 0xC2, 0x4F, 0x36, 0xA4, 0xEC, 0xA7, 0x79, 0x03}
#define ON 1
#define OFF 0

#define DELAY K_MSEC(10000)
#define SUPER_DELAY K_MSEC(60000)

/*
#define LOG_LEVEL CONFIG_LOG_DEFAULT_LEVEL
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(lorawan_class_a);
*/


 char data[] =        { 0X00 , 0X00 , 0X00 , 0X00 , //LATITUDE
                        0X00 , 0X00 , 0X00 , 0X00 , //LONGITUDE
					    0X00 , 0X00 , 0X00 , 0X00 , //TIMESTAMP
					    0X00 , 0X00 , 0X00 , 0X00 , //ANALOG
                        0X00 ,                      //DIGITAL
                        0X00 ,                      //DIGITAL
					    0X00 , 0X00 ,               //NTC0
                        0X00 , 0X00 ,               //NTC1 
                        0X00 , 0X00                 //NTC2 
                      };


/* 1000 msec = 1 sec */
#define SLEEP_TIME_MS   1000

/* The devicetree node identifier for the "led0" alias. */
#define LED0_NODE DT_ALIAS(led0)

/*
 * A build error on this line means your board is unsupported.
 * See the sample documentation for information on how to fix this.
 */
static const struct gpio_dt_spec led = GPIO_DT_SPEC_GET(LED0_NODE, gpios);



void main(void)
{
	int ret;

	if (!device_is_ready(led.port)) {
		return;
	}

	ret = gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE);
	if (ret < 0) {
		return;
	}

	while (1) {
		ret = gpio_pin_toggle_dt(&led);
		if (ret < 0) {
			return;
		}
		k_msleep(SLEEP_TIME_MS);
	}
}

The .prj modified

CONFIG_LOG=y
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

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

This is the Overlay's file created on example Blink Project

&spi1 {
    //VDD - CONNECT TO 3V - USE A 220UF TO GND
    //SCK  -->P1.15
	//MISO -->P1.10
    //MOSI -->P1.13
    cs-gpios = <&gpio0 2 GPIO_ACTIVE_LOW>; // PIN NSS
    lora0: sx1276@0 {
		        compatible = "semtech,sx1276";
		        reset-gpios = <&gpio0 29 GPIO_ACTIVE_LOW>; //RESET PIN
		        dio-gpios = 
                 <&gpio0 15 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>, //DIO-0
                 <&gpio0 13 (GPIO_PULL_DOWN | GPIO_ACTIVE_HIGH)>; //DIO-1
                 
		        power-amplifier-output = "pa-boost";
		        reg = <0>;
		        spi-max-frequency = <1000000>;
		        //label = "sx1276";
          };

};

&pinctrl{
    spi1_default: spi1_default {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>,
				<NRF_PSEL(SPIM_MISO, 1, 10)>;
		};
	};

	spi1_sleep: spi1_sleep {
		group1 {
			psels = <NRF_PSEL(SPIM_SCK, 1, 15)>,
				<NRF_PSEL(SPIM_MOSI, 1, 13)>,
				<NRF_PSEL(SPIM_MISO, 1, 10)>;
			low-power-enable;
		};
	};


};
/ {
    aliases {
        lora = &lora0;
    };
};

Generated .HEX file ok.

[167/172] Generating linker.cmd
[168/172] Generating isr_tables.c, isrList.bin
[169/172] Building C object zephyr/CMakeFiles/zephyr_final.dir/misc/empty_file.c.obj
[170/172] Building C object zephyr/CMakeFiles/zephyr_final.dir/dev_handles.c.obj
[171/172] Building C object zephyr/CMakeFiles/zephyr_final.dir/isr_tables.c.obj
[172/172] Linking C executable zephyr\zephyr.elf
Memory region         Used Size  Region Size  %age Used
           FLASH:       66036 B      1020 KB      6.32%
             RAM:       16128 B       256 KB      6.15%
        IDT_LIST:          0 GB         2 KB      0.00%

Then I upload the code to NRF52840 Dongle using the Programmer 3.0.8.

Resulted, the led1 doesn't blink.

But, if I comment the .prj as below:

CONFIG_LOG=y
CONFIG_MAIN_STACK_SIZE=2048
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

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

The led1 start blinking.

Does anyone can explain why?

The dongle doesn't have SWD to connect, I can't see any RTT messages.

The same .prj works perfectly on NRF5340DK.

Thanks in advance.

[Simonr]

Hi

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

[FlavioPiracicaba]

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