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Diffstat (limited to 'source/timers.rst')
| -rw-r--r-- | source/timers.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/source/timers.rst b/source/timers.rst index cb30081..9163e69 100644 --- a/source/timers.rst +++ b/source/timers.rst @@ -45,6 +45,16 @@ event" interrupt is generated. You can configure the Maple to notify you when this takes place, by registering an interrupt handler, which is a function that will be called when the update event occurs. +By default, different compare values only change the relative offsets +between events on a single timer ("phase"). They don't control the +frequency with which they occur. However, a common trick is to +increment the compare value manually in the interrupt handler so that +the event will fire again after the increment period. There can be a +different increment value for each channel, so this trick allows +events to be programmed at 4 different rates on a single timer. Note +that function call overheads mean that the smallest increment rate is +at least a few microseconds. + Function Reference ------------------ |