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libopencm3-examples/examples/stm32/f4/stm32f4-discovery/timer/README.md

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# README
This example demonstrates the use of timers to trigger an interrupt. This
example will toggle two LEDs spelling out the following morse code:
SOS -> ...---...
Where dots are .1s, dashes .2s, gaps .05s and the word pause .5s.
It's intended for the ST STM32F4DISCOVERY eval board. It should blink
the LEDs on the board.
## Board connections
*none required*