Echelon Neuron C - Manual (Page 113)

Neuron C Reference Guide 93
io_in ( input-obj );
The type of the return-value of the io_in( ) call is listed in the table above.
bitshift
For bitshift input objects, the syntax is:
io_in (
bitshift-input-obj [, numbits ]);
numbits The number of bits to be shifted in, from 1 to 127. Only
the last 16 bits shifted in are returned. The unused bits
are 0 if fewer than 16 bits are shifted in.
edgelog
For edgelog input objects, the syntax is:
io_in ( edgelog-input-obj , buf , count );
buf A pointer to a buffer of unsigned long values.
count The maximum number of values to be read.
The io_in( ) call has an unsigned short return-value that is the actual number of
edges logged.
ic2
For i2c I/O objects, the syntax is:
io_in ( i2c-io-obj , buf , addr , count );
io_in ( i2c-io-obj , buf , addr , count , stop );
buf A (void *) pointer to a buffer.
addr An unsigned short int I2C device address.
count The number of bytes to be transferred.
stop A Boolean value to specify whether the stop condition is
asserted after the transfer.
The io_in( ) call has a boolean return-value that indicates whether the transfer
succeeded (TRUE) or failed (FALSE).
infrared
For infrared input objects, the syntax is:
io_in ( infrared-obj , buf , ct , v1 , v2 );
buf A pointer to a buffer of unsigned short values.
ct The maximum number of bits to be read.
v1 The maximum period value (an unsigned long). See the
I/O model description in the I/O Model Reference .
v2 The threshold value (an unsigned long). See the infrared
I/O model description in the I/O Model Reference .