1PARPORT_WRITE(9)             Parallel Port Devices            PARPORT_WRITE(9)
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NAME

6       parport_write - write a block of data to a parallel port
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SYNOPSIS

9       ssize_t parport_write(struct parport * port, const void * buffer,
10                             size_t len);
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ARGUMENTS

13       port
14           port to write to
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16       buffer
17           data buffer (in kernel space)
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19       len
20           number of bytes of data to transfer
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DESCRIPTION

23       This will write up to len bytes of buffer to the port specified, using
24       the IEEE 1284 transfer mode most recently negotiated to (using
25       parport_negotiate), as long as that mode supports forward transfers
26       (host to peripheral).
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28       It is the caller's responsibility to ensure that the first len bytes of
29       buffer are valid.
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31       This function returns the number of bytes transferred (if zero or
32       positive), or else an error code.
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35Kernel Hackers Manual 3.10         June 2019                  PARPORT_WRITE(9)
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