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Led with Xilinx Zynq

LED with RPi

The user LED on RPi is labelled ACT, and it is controllable directly using Linux LED subsystem, as default it is assigned to SD Card activity, that is why it is labelled "ACT".

First you nee to be root.

sudo -i<ENTER>
password root<ENTER>

set password for root and reboot and log in as root.

cd /sys/class/leds/led0
cat none > trigger

Now we are ready to control the user LED on Raspberry

cat 1 > brightness
cat 0 >brightness
cat heartbeat > trigger

The above 3 lines show how to control the LED on, off and set to blink..!