What does mask and "1 <<" mean!

[abuzar12]

What does mask and 1<< mean in the following code:

#define BSP_LED_0_MASK (1<<BSP_LED_0)
#define BSP_LED_1_MASK (1<<BSP_LED_1)
#define BSP_LED_2_MASK (1<<BSP_LED_2)
#define BSP_LED_3_MASK (1<<BSP_LED_3)

[Turbo J]

If you don't know what << is doing, you really need to read a book about the C programming language. This should also explain what a bitmask is.

[Stian Røed Hafskjold]

en.wikipedia.org/.../Bitwise_operations_in_C