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add t to documentation

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1 parent e583573 commit 4135279d248a1df51fd1c48d1e1454255759b60d WardCunningham committed Aug 16, 2010
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@@ -79,6 +79,10 @@ Each Teensy uses a different MCU as follows: at90usb162: Teensy 1.0, atmega32u4:
Each command is listed with a signature indicating pre and post conditions and followed with a word or two of description. Command signatures and descriptions will not be change unless the commands themselves change so that drivers can sense remote capability by parsing this output.
+- `t` measure pulse width on selected pin
+
+Wait for two transitions on selected pin. Set x to exlapsed time between these transitions, or zero if wait for either transition overflows x (about 1/30 second). Time unit is clock period divided by nine (Millisconds = result * 9 / 16).
+
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