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→Test RS-485 communication with two IGEP0020 boards
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</pre> Setup a NFS-TFTP environment (poky-image-sato) for each board using kernel image with RS-485 support, and power up Build the example for your target boards (485-example.c at the end of this article), $ cd linux-omap-2.6.28.10-3 $ arm-none-linux-gnueabi-gcc 485-example.c -o 485-example -Iinclude -Iarch/arm/include and copy to target rootfs. Now, open a [[Using SSH to communicate|ssh console]] to the first board and execute the microcom command: root@igep0020:~# microcom /dev/ttyS0 connected to '/dev/ttyS0' (9600 bps), exit with ctrl-X... On second board, open a ssh and execute the 485 example: root@igep0020:~# ./485-example If all is ok, should appear "ABC" in microcom console. root@igep0020:~# microcom /dev/ttyS0 connected to '/dev/ttyS0' (9600 bps), exit with ctrl-X... ABC
= Appendix A: 485-example.c : Basic example of RS-485 half duplex transmission =
