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| author | joan <joan@abyz.co.uk> | 2016-10-30 15:30:20 +0000 |
|---|---|---|
| committer | joan <joan@abyz.co.uk> | 2016-10-30 15:30:20 +0000 |
| commit | c31a2fa6b2571b273bade21f98af56a435f7a2ce (patch) | |
| tree | 25bcd18edbe1e4025e858d6396d460742a01d8fc /pigpiod_if.3 | |
| parent | abe5f129420b87bd918aec34b28a33d982bd75a2 (diff) | |
V57
Diffstat (limited to 'pigpiod_if.3')
| -rw-r--r-- | pigpiod_if.3 | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/pigpiod_if.3 b/pigpiod_if.3 index 284a3ae..2fe7ed2 100644 --- a/pigpiod_if.3 +++ b/pigpiod_if.3 @@ -3612,6 +3612,11 @@ handle: >=0, as returned by a call to \fBserial_open\fP. Returns the read byte (>=0) if OK, otherwise PI_BAD_HANDLE, PI_SER_READ_NO_DATA, or PI_SER_READ_FAILED. +.br + +.br +If no data is ready PI_SER_READ_NO_DATA is returned. + .IP "\fBint serial_write(unsigned handle, char *buf, unsigned count)\fP" .IP "" 4 This function writes count bytes from buf to the the serial port @@ -3662,6 +3667,11 @@ handle: >=0, as returned by a call to \fBserial_open\fP. Returns the number of bytes read (>0) if OK, otherwise PI_BAD_HANDLE, PI_BAD_PARAM, PI_SER_READ_NO_DATA, or PI_SER_WRITE_FAILED. +.br + +.br +If no data is ready zero is returned. + .IP "\fBint serial_data_available(unsigned handle)\fP" .IP "" 4 Returns the number of bytes available to be read from the |