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e7ee53e6ed
To synchronize communication via shared memory between ISR context and thread context it is a common misconception that `volatile` is sufficient. This is however is not the cause and the cause of many subtle data race bugs. This fixes the issue.
Periph Timer Test
About
This application will test all configured peripheral timers of the target platform. For each timer, it will set each channel with an incrementing timeout: CH0 is set to 5ms, CH1 to 10ms, CH2 to 15ms and so on.
Expected Result
The output should show that every channel fired after an evenly distributed amount of time, i.e. the diff values should be equal (with some jitter...).
Note
This test does however NOT show whether the timeouts and diffs were correct in relation to the expected real-time; use e.g. tests/xtimer_msg for this.