IoT Development Kit

Info

Please refer to board's documentation for detailed information about how to setup the board for initial operation.

Also refer Getting OpenOCD and Using OpenOCD for details about installing and using OpenOCD.

Building an Application

Consider a simple application with name main.c:

#include <stdio.h>

int main()
{
    printf("Hello, World!\n");
    return 0;
}

Build the application:

arc-elf32-gcc -mcpu=em4_fpuda -mmpy-option=wlh5 -mfpu=fpuda_all \
              -specs=iotdk.specs main.c -o main.elf

-specs=iotdk.specs sets a proper memory map and links the application with additional startup code and UART library for input/output operations.

Running an Application

Follow Using OpenOCD guide and start OpenOCD with snps_iotdk.cfg configuration file. Here is an example:

$ openocd -f board/snps_iotdk.cfg
Open On-Chip Debugger 0.9.0-dev-g8ee31a5 (2023-09-27-21:15)
Licensed under GNU GPL v2
For bug reports, read
        http://openocd.sourceforge.net/doc/doxygen/bugs.html
adapter speed: 8000 kHz
Info : clock speed 8000 kHz
Info : JTAG tap: arc-em.cpu tap/device found: 0x200444b1 (mfg: 0x258, part: 0x0044, ver: 0x2)
Info : JTAG tap: arc-em.cpu tap/device found: 0x200444b1 (mfg: 0x258, part: 0x0044, ver: 0x2)
target state: halted
target state: halted

Then connect to the server using GDB:

$ arc-elf32-gdb -quiet main.elf
(gdb) target remote :3333

# Increase timeout, because OpenOCD sometimes can be slow
(gdb) set remotetimeout 15

# Load application into target
(gdb) load

# Go to start of main function
(gdb) tbreak main
(gdb) continue

# Resume with usual GDB commands
(gdb) step
(gdb) next

# Go to end of the application
(gdb) tbreak exit
(gdb) continue

# For example, check exit code of application
(gdb) info reg r0

Connecting to the Serial Terminal

Follow the corresponding guide for ARC IoT Development Kit.