48 lines
2.0 KiB
C
48 lines
2.0 KiB
C
|
/* Serial Input for the Visium processor.
|
||
|
|
|
||
|
|
Copyright (c) 2015 Rolls-Royce Controls and Data Services Limited.
|
||
|
|
All rights reserved.
|
||
|
|
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions are met:
|
||
|
|
|
||
|
|
* Redistributions of source code must retain the above copyright notice,
|
||
|
|
this list of conditions and the following disclaimer.
|
||
|
|
* Redistributions in binary form must reproduce the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer in the
|
||
|
|
documentation and/or other materials provided with the distribution.
|
||
|
|
* Neither the name of Rolls-Royce Controls and Data Services Limited nor
|
||
|
|
the names of its contributors may be used to endorse or promote products
|
||
|
|
derived from this software without specific prior written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
||
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
|
||
|
|
THE POSSIBILITY OF SUCH DAMAGE. */
|
||
|
|
|
||
|
|
char
|
||
|
|
inbyte (void)
|
||
|
|
{
|
||
|
|
#ifdef __VISIUM_ARCH_MCM__
|
||
|
|
volatile int *const rxdata = (int *) 0x20003920;
|
||
|
|
volatile int *const rxqs = (int *) 0x20003930;
|
||
|
|
#else
|
||
|
|
volatile int *const rxdata = (int *) 0x20001a20;
|
||
|
|
volatile int *const rxqs = (int *) 0x20001a30;
|
||
|
|
#endif
|
||
|
|
int bytes_in_fifo = 0;
|
||
|
|
|
||
|
|
while (!bytes_in_fifo)
|
||
|
|
bytes_in_fifo = *rxqs;
|
||
|
|
|
||
|
|
/* Read one character. */
|
||
|
|
return (*rxdata) & 0xff;
|
||
|
|
}
|