Communication between nrf52840 and nrf9160 on thingy 91

[Hamada888]

Hei

I am trying to make SPI or UART communication between nrf9160 and nrf52840 on thingy 91....... i need to send data from nrf52840 to nrf9160(i will use and print the data)
what is the best way to do it? I tried connectivity bridge, but with no hope......

Another small question....i cannot get any thing out on putty when i write printk("hello world"); in the main function in connectivity bridge code ...how to fix it?

[Albrecht Markus Schellenberger]

Hello Mohammad,

you can communicate between the nRF9160 and nRF52840 on the Thingy:91 using MCU_IF.

https://www.nordicsemi.com/-/media/Software-and-other-downloads/Dev-Kits/Thingy91/Hardware-files/Thingy91---Hardware-files-1_5_0.zip

Have a look at “PCA20035_Schematic_And_PCB.pdf” page 2 (nRF91 GPIO pin mapping) & 3 (nRF52 GPIO pin mapping). The instances UART0 and UART1 on both sides are already pre-configured to communicate with each other.

 

Another small question....i cannot get any thing out on putty when i write printk("hello world"); in the main function in connectivity bridge code ...how to fix it?

In the file ../build/zephyr/zephyr.dts you can see that UART0 is used to write to the console. But since the connectivity bridge application doesn’t have a “connectivity bridge” for its own console data, it will not be transmitted from the nRF52840 via USB. Alternatively, you can use RTT to read printk commandos by setting CONFIG_RTT_CONSOLE=y in prj.conf.

 Cheers!

Markus

[Hamada888]

thanks again for your answer


i am trying now lpuart with asset tracker........... i copied lpuart code into asset tracker......... i get feil ("Failed to get the device") .................

in main function I have:

 lpuart = device_get_binding("LPUART");
__ASSERT(lpuart, "Failed to get the device");



thingy91_nrf9160ns.overlay:

&uart1 {
compatible = "nordic,nrf-uarte";
status = "okay";
rx-pin = <44>;
tx-pin = <45>;
baudrate = <1000000>;
/delete-property/ rts-pin;
/delete-property/ cts-pin;
/delete-property/ hw-flow-control;

lpuart: nrf-sw-lpuart {
compatible = "nordic,nrf-sw-lpuart";
status = "okay";
label = "LPUART";
req-pin = <46>;
rdy-pin = <47>;
};
};

prj.conf:

#
# Copyright (c) 2019 Nordic Semiconductor ASA
#
# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
#
# General config
CONFIG_NEWLIB_LIBC=y
CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y
CONFIG_ASSERT=y
CONFIG_REBOOT=y
CONFIG_LOG=y
CONFIG_LOG_IMMEDIATE=y

# Network
CONFIG_NETWORKING=y
CONFIG_NET_NATIVE=n
CONFIG_NET_SOCKETS=y
CONFIG_NET_SOCKETS_OFFLOAD=y

# LTE link control
CONFIG_POWER_OPTIMIZATION_ENABLE=n
CONFIG_LTE_LINK_CONTROL=y
CONFIG_LTE_NETWORK_MODE_LTE_M_GPS=y
CONFIG_LTE_AUTO_INIT_AND_CONNECT=n

CONFIG_LTE_NETWORK_MODE_NBIOT_GPS=n
CONFIG_LTE_LEGACY_PCO_MODE=n
CONFIG_LTE_PSM_REQ_RPTAU="00000110"
CONFIG_LTE_PSM_REQ_RAT="00000010"

# Modem info
CONFIG_MODEM_INFO=y
CONFIG_MODEM_INFO_ADD_DATE_TIME=n

# Modem library
CONFIG_NRF_MODEM_LIB=y
CONFIG_NRF_MODEM_LIB_TRACE_ENABLED=n

# nRF Cloud
CONFIG_CLOUD_API=y
CONFIG_NRF_CLOUD=y
CONFIG_NRF_CLOUD_LOG_LEVEL_DBG=y
CONFIG_NRF_CLOUD_AGPS=y
CONFIG_NRF_CLOUD_CONNECTION_POLL_THREAD=y
CONFIG_NRF_CLOUD_SEND_TIMEOUT=y
CONFIG_NRF_CLOUD_SEND_TIMEOUT_SEC=60
CONFIG_NRF_CLOUD_FOTA_LOG_LEVEL_DBG=y
# nRF Cloud FOTA download configuration
CONFIG_DOWNLOAD_CLIENT_STACK_SIZE=4096
# Needed for the cloud codec
CONFIG_CJSON_LIB=y
# Shorter to prevent NAT timeouts
CONFIG_MQTT_KEEPALIVE=120
# Don't resubscribe to topics if broker remembers them
CONFIG_MQTT_CLEAN_SESSION=n

# Sensors
CONFIG_ACCEL_USE_SIM=y
CONFIG_TEMP_USE_SIM=y
CONFIG_CLOUD_BUTTON=n

# GPS
CONFIG_NRF9160_GPS=y
# CONFIG_GPS_USE_SIM=y
CONFIG_NRF9160_GPS_LOG_LEVEL_DBG=y
CONFIG_GPS_USE_EXTERNAL=y
CONFIG_GPS_DEV_NAME="NRF9160_GPS"
CONFIG_GPS_CONTROL_PSM_ENABLE_ON_START=y

CONFIG_GPS_CONTROL_FIRST_FIX_CHECK_DELAY=10
CONFIG_GPS_CONTROL_FIX_CHECK_INTERVAL=30
CONFIG_GPS_CONTROL_FIX_TRY_TIME=360
CONFIG_GPS_CONTROL_PSM_DISABLE_ON_STOP=n
CONFIG_AGPS=y

# Library for buttons and LEDs
CONFIG_DK_LIBRARY=y
CONFIG_DK_LIBRARY_INVERT_LEDS=n

# Library that maintains the current date time UTC.
CONFIG_DATE_TIME=y

# Console
CONFIG_CONSOLE_SUBSYS=y
CONFIG_CONSOLE_HANDLER=y
CONFIG_CONSOLE_GETCHAR=y

# Heap and stacks
CONFIG_HEAP_MEM_POOL_SIZE=16384
CONFIG_MAIN_STACK_SIZE=8192
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048

# Settings
CONFIG_FLASH=y
CONFIG_FLASH_PAGE_LAYOUT=y
CONFIG_FLASH_MAP=y
CONFIG_FCB=y
CONFIG_SETTINGS=y
CONFIG_SETTINGS_FCB=y
CONFIG_MPU_ALLOW_FLASH_WRITE=y

# MCUBOOT
CONFIG_BOOTLOADER_MCUBOOT=y
CONFIG_IMG_MANAGER=y
CONFIG_MCUBOOT_IMG_MANAGER=y
CONFIG_IMG_ERASE_PROGRESSIVELY=y

CONFIG_CONSOLE=n               // this one from lpuart sample
CONFIG_UART_CONSOLE=n
CONFIG_NRF_SW_LPUART=y

# Fatal error
CONFIG_RESET_ON_FATAL_ERROR=n
CONFIG_WATCHDOG=y


how to fix it? i need to use uart to connect to nrf52840

Mohammad