Hi there,
I'm using the AT91SAM9G20-EK Board running the linux demo files (angstrom) found on:

http://www.at91.com/linux4sam/bin/view/ ... d#Demo9g20

How is it posible to turn the "DS5" user LED on/off using a simple shell command?

What I've done with no success:

#: echo 1 > /sys/class/leds/ds5/brightness

#: echo 0 > /sys/class/leds/ds5/brightness

What's wrong

Risto

I found the reason for my led turn on/off problem:

- In "linux-2.6.30/arch/arm/mach-at91/board-sam9g20ek.c" the leds on the board are configured as follows:

/*
* LEDs
*/
static struct gpio_led ek_leds[] = {
{ /* "bottom" led, green, userled1 to be defined */
.name = "ds5",
.gpio = AT91_PIN_PA6,
.active_low = 1,
.default_trigger = "none",
},
{ /* "power" led, yellow */
.name = "ds1",
.gpio = AT91_PIN_PA9,
.default_trigger = "heartbeat",
}
};

- Now, have a look at the schematic diagrams:
led ds5 is connected to gpio AT91_PIN_PB8
led ds1 is connected to gpio AT91_PIN_PB9

- LED configuration in kernel sources does not match with the AT91SAM9G20EK (REV C) Board.

risto