Revert "Revert "added a short delay and comment to boolean operator in CDC""
This reverts commit 200eefb4e2ac7796c5c901e8fd9369c85ec544c5.
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02c5849501
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ee611dc194
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@ -213,10 +213,19 @@ size_t Serial_::write(uint8_t c)
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return 0;
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return 0;
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}
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}
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// This operator is a convenient way for a sketch to check whether the
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// port has actually been configured and opened by the host (as opposed
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// to just being connected to the host). It can be used, for example, in
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// setup() before printing to ensure that an application on the host is
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// actually ready to receive and display the data.
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// We add a short delay before returning to fix a bug observed by Federico
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// where the port is configured (lineState != 0) but not quite opened.
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Serial_::operator bool() {
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Serial_::operator bool() {
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if (_usbLineInfo.lineState > 0)
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bool result = false;
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return true;
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if (_usbLineInfo.lineState > 0)
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return false;
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result = true;
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delay(10);
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return result;
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}
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}
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Serial_ Serial;
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Serial_ Serial;
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