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GeneralRe: Using fstream with USB Serial Port Pin
OscardelaGrouch12-Jul-18 18:42
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GeneralRe: Using fstream with USB Serial Port Pin
Jochen Arndt12-Jul-18 20:59
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GeneralRe: Using fstream with USB Serial Port Pin
OscardelaGrouch14-Jul-18 7:51
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GeneralRe: Using fstream with USB Serial Port Pin
Jochen Arndt14-Jul-18 8:36
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GeneralRe: Using fstream with USB Serial Port Pin
OscardelaGrouch14-Jul-18 8:38
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GeneralRe: Using fstream with USB Serial Port Pin
Jochen Arndt14-Jul-18 8:43
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GeneralRe: Using fstream with USB Serial Port Pin
OscardelaGrouch14-Jul-18 9:40
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GeneralRe: Using fstream with USB Serial Port Pin
Jochen Arndt14-Jul-18 12:49
mveJochen Arndt14-Jul-18 12:49 
That is EGAIN (you can look it up in errno.h and get the corresponding error message with strerror(3) - Linux manual page[^] ) and in most cases (as here) not an error. You are just calling read again too fast (the next character has not been received so far).

To avoid this you can set a timeout value. Then the read() will block until data are available or a timeout occured.
QuestionWhich do I use ide for learn c ++ Pin
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AnswerRe: Which do I use ide for learn c ++ Pin
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GeneralRe: Which do I use ide for learn c ++ Pin
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GeneralRe: Which do I use ide for learn c ++ Pin
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Questionfree pointer to pointer Pin
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GeneralRe: free pointer to pointer Pin
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