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///////////////////////////////////////////////////////////////////////////////////////
// File SPI.xs
// Description: XS module for HiPi::Device::SPI
// Copyright: Copyright (c) 2013-2017 Mark Dootson
// License: This is free software; you can redistribute it and/or modify it under
// the same terms as the Perl 5 programming language system itself.
///////////////////////////////////////////////////////////////////////////////////////
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "mylib/include/ppport.h"
#include <sys/ioctl.h>
#include <linux/spi/spidev.h>
MODULE = HiPi::Device::SPI PACKAGE = HiPi::Device::SPI
void
_transfer_data(file, inbuf, delay = 0, speed = 1000000, bitspw = 8 )
int file
SV* inbuf
__u16 delay
__u32 speed
__u8 bitspw
PPCODE:
struct spi_ioc_transfer msg;
memset (&msg, 0, sizeof(msg));
SV* outbuf = newSVsv(inbuf);
msg.tx_buf = (intptr_t)SvPVX(inbuf);
msg.rx_buf = (intptr_t)SvPVX(outbuf);
msg.len = (__u32)SvCUR(inbuf);
msg.speed_hz = speed;
msg.delay_usecs = delay;
msg.bits_per_word = bitspw;
##// msg.cs_change:1
##// msg.pad
int ioval = ioctl (file, SPI_IOC_MESSAGE(1), &msg);
if( ioval >= 0)
{
EXTEND(SP, 1);
PUSHs(sv_2mortal(outbuf));
}
else
{
EXTEND(SP, 1);
PUSHs(&PL_sv_undef);
}
int
_set_spi_max_speed(file, speed)
int file
__u32 speed
CODE:
int rval;
rval = ioctl(file, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
if( rval < 0 )
rval = -1;
RETVAL = rval;
OUTPUT: RETVAL
int
_get_spi_max_speed(file)
int file
CODE:
__u32 speed;
int rval;
rval = ioctl(file, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
if( rval < 0 ) {
RETVAL = -1;
} else {
RETVAL = speed;
}
OUTPUT: RETVAL
int
_set_spi_mode(file, mode)
int file
__u8 mode
CODE:
int rval;
rval = ioctl(file, SPI_IOC_WR_MODE, &mode);
if( rval < 0 )
rval = -1;
RETVAL = rval;
OUTPUT: RETVAL
int
_get_spi_mode(file)
int file
CODE:
int rval;
__u8 mode;
rval = ioctl(file, SPI_IOC_RD_MODE, &mode);
if( rval < 0 ) {
RETVAL = -1;
} else {
RETVAL = mode;
}
OUTPUT: RETVAL
int
_set_spi_bits_per_word(file, bitspw)
int file
__u8 bitspw
CODE:
int rval;
rval = ioctl(file, SPI_IOC_WR_BITS_PER_WORD, &bitspw);
if( rval < 0 )
rval = -1;
RETVAL = rval;
OUTPUT: RETVAL
int
_get_spi_bits_per_word(file)
int file
CODE:
int rval;
__u8 bitspw;
rval = ioctl(file, SPI_IOC_RD_BITS_PER_WORD, &bitspw);
if( rval < 0 ) {
RETVAL = -1;
} else {
RETVAL = bitspw;
}
OUTPUT: RETVAL
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