Nordicsemi nRF9160 is an ARM Cortex-M33 SiP (system in package) with LTE modem.
For nRF9160-DK connect micro usb cable to J4, for other boards connect UART pins as follows:
| nRF9160 | UART-to-USB adapter |
|---|---|
| P0.29 (TX) | RX |
| P0.28 (RX) | TX |
UART baud rate: 115200
Connect SWD pins as follows:
| nRF9160 | Segger JLINK adapter |
|---|---|
| SWDIO | SWDIO |
| SWDCLK | SWCLK |
| Ground | Ground |
This app depends on the secure bootloader for nRF9160.
$ sudo apt install gcc-arm-linux-gnueabi
$ export CROSS_COMPILE=arm-linux-gnueabi-
$ sudo pkg install arm-none-eabi-gcc arm-none-eabi-binutils
$ export CROSS_COMPILE=arm-none-eabi-
$ git clone --recursive https://github.com/machdep/nrf9160
$ cd nrf9160
$ make
$ nrfjprog -f NRF91 --erasepage 0x40000-0x90000
$ nrfjprog -f NRF91 --program obj/nrf9160.hex -r
$ sudo apt install pkg-config autotools-dev automake libtool
$ git clone https://github.com/bukinr/openocd-nrf9160
$ cd openocd-nrf9160
$ ./bootstrap
$ ./configure --enable-jlink
$ make
$ export OPENOCD_PATH=/path/to/openocd-nrf9160
$ sudo ${OPENOCD_PATH}/src/openocd -s ${OPENOCD_PATH}/tcl \
-f interface/jlink.cfg -c 'transport select swd; adapter_khz 1000' \
-f target/nrf9160.cfg -c "program nrf9160.elf 0 reset verify exit"
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