pax_global_header00006660000000000000000000000064135733630040014516gustar00rootroot0000000000000052 comment=4a36a84f7df291ddaebd397aecf0c8515256a8e0 spi-tools-0.8.4/000077500000000000000000000000001357336300400134605ustar00rootroot00000000000000spi-tools-0.8.4/.gitignore000066400000000000000000000007031357336300400154500ustar00rootroot00000000000000# http://www.gnu.org/software/automake Makefile.in # http://www.gnu.org/software/autoconf /autom4te.cache /aclocal.m4 /compile /configure /depcomp /install-sh /missing stamp-h1 .deps Makefile config.h.in* config.log config.status # Object files *.o *.ko *.obj *.elf # Libraries *.lib *.a *.la *.lo # Shared objects (inc. Windows DLLs) *.dll *.so *.so.* *.dylib # Executables *.exe *.out *.app *.i*86 *.x86_64 *.hex src/spi-pipe src/spi-configspi-tools-0.8.4/LICENSE000066400000000000000000000431511357336300400144710ustar00rootroot00000000000000GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. 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It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. {description} Copyright (C) {year} {fullname} This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) year name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. {signature of Ty Coon}, 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License.spi-tools-0.8.4/Makefile.am000066400000000000000000000000461357336300400155140ustar00rootroot00000000000000SUBDIRS=src man #ACLOCAL_AMFLAGS=-I m4spi-tools-0.8.4/README.md000066400000000000000000000061571357336300400147500ustar00rootroot00000000000000spi-tools ========= This package contains some simple command line tools to help using Linux spidev devices. Content ------- ### `spi-config` Query or set the SPI configuration (mode, speed, bits per word, etc.) ### `spi-pipe` Send and receive data simultaneously to and from a SPI device. License ------- The tools are released under the GPLv2 license. See `LICENSE` file for details. Author ------ Christophe Blaess http://www.blaess.fr/christophe Installation ------------ First, get the latest version on https://github.com/cpb-/spi-tools.git # autoreconf -fim # ./configure Simply do a `make` to build the tools, then `make install` to install them and the man pages. If you have to use a cross-compilation toolchain, simply fill the `CROSS_COMPILE` environment variable with the cross-compiler prefix. You can use `make uninstall` to remove the installed files. Usage ----- ### spi-config usage #### options * `-d --device=` use the given spi-dev character device. * `-q --query` print the current configuration. * `-m --mode=[0-3]` use the selected spi mode. * `-l --lsb={0,1}` LSB first (1) or MSB first (0). * `-b --bits=[7...]` bits per word. * `-s --speed=` set the speed in Hz. * `-r --spirdy={0,1}` set the SPI_READY spi mode flag. * `-w --wait` block, keeping the file descriptor open. * `-h --help` help screen. * `-v --version` display the version number. #### Read the current configuration ``` $ spi-config -d /dev/spidev0.0 -q /dev/spidev0.0: mode=0, lsb=0, bits=8, speed=500000 $ ``` #### Change the clock frequency and read it again ``` $ spi-config -d /dev/spidev0.0 -s 10000000 $ spi-config -d /dev/spidev0.0 -q /dev/spidev0.0: mode=0, lsb=0, bits=8, speed=10000000 $ ``` Note: on some platforms, the speed is reset to a default value when the file descriptor is closed. To avoid this, one can use the `-w` option that keep the file descriptor open. For example: ``` $ spi-config -d /dev/spidev0.0 -s 10000000 -w & $ PID=$! ``` And when you don't need the SPI device anymore: ``` $ kill $PID ``` ### spi-pipe usage #### Options * `-d --device=` use the given spi-dev character device. * `-s --speed=` Maximum SPI clock rate (in Hz). * `-b --blocksize=` transfer block size in byte. * `-n --number=` number of blocks to transfer. * `-h --help` help screen. * `-v --version` display the version number. #### Send and receive simultaneously Sending data from `command-1` to SPI link and receiving data from SPI link to `command-2` ``` $ command_1 | spi-pipe -d /dev/spidev0.0 | command_2 ``` Note that `command_1`, `command_2` and `spi-pipe` run simultaneously in three parallel processes. #### Send data to the SPI link ``` $ command_1 | spi-pipe -d /dev/spidev0.0 ``` #### Receive data from the SPI link ``` $ spi-pipe -d /dev/spidev0.0 < /dev/zero | command_2 ``` You can also use `command_2 < /dev/spidev0.0` but with `spi-pipe` you control what is sent to the device (always `0` in this case). #### Read 40 blocks of 4 bytes from the SPI link ``` $ spi-pipe -d /dev/spidev0.0 -b 4 -n 40 < /dev/zero | command_2 ``` spi-tools-0.8.4/configure.ac000066400000000000000000000045121357336300400157500ustar00rootroot00000000000000# -*- Autoconf -*- # Process this file with autoconf to produce a configure script. AC_PREREQ([2.60]) AC_INIT(spi-tools, 0.8.4, Christophe Blaess) AM_INIT_AUTOMAKE([foreign]) AM_MAINTAINER_MODE([disable]) ########################################################################## # Checks for programs. AC_PROG_MAKE_SET AC_PROG_CC AC_PROG_CC_C99 AM_PROG_CC_C_O AC_LANG_C AC_C_CONST AC_TYPE_SIZE_T AC_STRUCT_TM AC_DEFINE([_GNU_SOURCE], 1, [Use GNU extensions]) # Checks for libraries. AC_CHECK_PROGS([DOXYGEN], [doxygen]) if test -z "$DOXYGEN"; then AC_MSG_WARN([Doxygen not found - continuing without Doxygen support]) fi #AM_CONDITIONAL([HAVE_DOXYGEN], [test -n "$DOXYGEN"])AM_COND_IF([HAVE_DOXYGEN], [AC_CONFIG_FILES([docs/Doxyfile])]) # Checks for header files. AC_CHECK_HEADERS([fcntl.h limits.h stddef.h stdint.h stdlib.h string.h sys/time.h unistd.h]) # Checks for typedefs, structures, and compiler characteristics. AC_HEADER_STDBOOL AC_C_INLINE AC_TYPE_SIZE_T AC_TYPE_SSIZE_T AC_TYPE_UINT16_T AC_TYPE_UINT32_T AC_TYPE_UINT64_T AC_TYPE_UINT8_T AC_FUNC_STRFTIME AC_FUNC_STRTOD AC_FUNC_ERROR_AT_LINE AC_CHECK_FUNCS([memmove memset]) AC_CONFIG_SRCDIR([src]) AC_CONFIG_FILES([Makefile src/Makefile man/Makefile]) AC_CONFIG_HEADERS([src/config.h]) ########################################################################## # debug compilation support ########################################################################## AC_MSG_CHECKING([whether to build with debug information]) AC_ARG_ENABLE([debug], [AS_HELP_STRING([--enable-debug], [enable debug data generation (def=no)])], [debugit="$enableval"], [debugit=no]) AC_MSG_RESULT([$debugit]) if test x"$debugit" = x"yes"; then AC_DEFINE([DEBUG],[],[Debug Mode]) AM_CFLAGS="-g -Wall -Werror -Wno-uninitialized -O0" AM_CXXFLAGS="-g -Wall -Werror -Wno-uninitialized -O0" AC_MSG_NOTICE([Debug Mode on.]) else AC_DEFINE([NDEBUG],[],[No-debug Mode]) AM_CFLAGS="-O0 $AM_CFLAGS" AM_CXXFLAGS="-O0 $AM_CXXFLAGS" AC_MSG_NOTICE([Debug Mode off.]) fi AC_PATH_PROG(HELP2MAN, help2man, echo No help2man ) CFLAGS="$AM_CFLAGS" CXXFLAGS="$AM_CXXFLAGS" ########################################################################## AC_OUTPUT spi-tools-0.8.4/man/000077500000000000000000000000001357336300400142335ustar00rootroot00000000000000spi-tools-0.8.4/man/Makefile.am000066400000000000000000000000471357336300400162700ustar00rootroot00000000000000dist_man_MANS = spi-config.1 spi-pipe.1spi-tools-0.8.4/man/spi-config.1000066400000000000000000000043041357336300400163540ustar00rootroot00000000000000.TH SPI-CONFIG "1" "August 2014" "SPI-tools" "User Commands" .SH NAME spi-config \- set or query SPI configuration. .SH SYNOPSIS .B spi-config \fIoptions\fR... .SH DESCRIPTION .PP Set or query the configuration of a SPI port. .TP \fB\-d\fR, \fB\-\-device\fR=\fIDEVICE\fR use the given Linux spidev character device. .TP \fB\-q\fR, \fB\-\-query\fR print the current configuration. .TP \fB\-m\fR, \fB\-\-mode\fR=\fI[0-3]\fR set the spi mode (see SPI MODES below). .TP \fB\-l\fR, \fB\-\-lsb\fR=\fI{0,1}\fR set LSB first (1) or MSB first (0). .TP \fB\-b\fR, \fB\-\-bits\fR=\fI[7...]\fR set the number of bits per word. .TP \fB\-s\fR, \fB\-\-speed\fR=\fIFREQUENCY\fR set clock frequency (in Hz). .TP \fB\-r\fR, \fB\-\-spirdy\fR=\fI{0,1}\fR set the SPI READY mode flag. .TP \fB\-s\fR, \fB\-\-wait block, keeping the file descriptor open. See \fBWAIT OPTION\fR below. .TP \fB\-h\fR, \fB\-\-help\fR display the help screen and exit. .TP \fB\-v\fR, \fB\-\-version\fR display the version number and exit. .SS "SPI MODES" .TP mode 0 low iddle level, sample on leading edge. .TP mode 1 low iddle level, sample on trailing edge. .TP mode 2 high iddle level, sample on leading edge. .TP mode 3 high iddle level, sample on trailing edge. .SS "WAIT OPTION" On some platforms, the speed is reset to a default value when the file descriptor is closed. To avoid this, one can use the \fB\-w\fR option that keeps the file descriptor open. See also last example below. .SH EXAMPLES .TP Get help: $ \fBspi\-config \-h\fR .TP Query current configuration: $ \fBspi\-config \-\-device=/dev/spidev0.0 \-q\fR .TP Change clock frequency to 1 MHz: $ \fBspi\-config \-\-device=/dev/spidev0.0 \-\-speed=1000000\fR .TP Set a configuration and keep the device open: $ \fBspi\-config \-\-wait \-\-speed=1000000\fR & PID=$! .TP Close device previously open: $ \fBkill\fP $PID .SH AUTHOR Written by Christophe BLAESS . .SH "REPORTING BUGS" .br Github home page: .SH COPYRIGHT Copyright \(co 2014 Christophe Blaess. .br Licensed under GPLv2 . .br This is free software: you are free to change and redistribute it. .br There is NO WARRANTY, to the extent permitted by law. spi-tools-0.8.4/man/spi-pipe.1000066400000000000000000000037551357336300400160550ustar00rootroot00000000000000.TH SPI-PIPE "1" "August 2014" "SPI-tools" "User Commands" .SH NAME spi-pipe \- full-duplex SPI communication tool. .SH SYNOPSIS .B spi-pipe \fIoptions\fR... .SH DESCRIPTION .PP This program allows full-duplex communications, sending data from its standard input to the SPI slave, and displaying on its standard output the data received from the SPI port. .TP \fB\-d\fR, \fB\-\-device\fR=\fIDEVICE\fR use the given Linux spidev character device. .TP \fB\-s\fR, \fB\-\-speed\fR=\fI\fR set the target SPI speed for transfer. .TP \fB\-b\fR, \fB\-\-blocksize\fR=\fI\fR set the block size (in bytes) for transfer. .TP \fB\-n\fR, \fB\-\-number\fR=\fI\fR set the number of blocks to transmit (-1 for continuous transfert). .TP \fB\-h\fR, \fB\-\-help\fR display the help screen and exit. .TP \fB\-v\fR, \fB\-\-version\fR display the version number and exit. .SH EXAMPLES .TP Get help: $ \fBspi\-pipe \-h\fR .TP Send and receive at the same time $ \fIcommand-1\fR | \fBspi\-pipe \-\-device=/dev/spidev0.0 \fR | \fIcommand-2\fR .br Note that \fIcommand-1\fR, \fIcommand-2\fR and \fBspi\-pipe\fR run simultaneously in three different processes. .TP Send data to the SPI link $ \fIcommand-1\fR | \fBspi\-pipe \-\-device=/dev/spidev0.0 \fR .TP Receive data from the SPI link $ \fBspi\-pipe \-\-device=/dev/spidev0.0 < /dev/zero\fR | \fIcommand-2\fR .br You can also use \fIcommand-2 < /dev/spidev0.0\fR but with \fBspi-pipe\fR you can control what is sent to the device (always `0` here). .TP Read 40 blocks of 4 bytes from the SPI link $ \fBspi\-pipe \-\-device=/dev/spidev0.0 \-b 4 \-n 40 < /dev/zero\fR | \fIcommand-2\fR .SH AUTHOR Written by Christophe BLAESS . .SH "REPORTING BUGS" .br Github home page: .SH COPYRIGHT Copyright \(co 2014 Christophe Blaess. .br Licensed under GPLv2 . .br This is free software: you are free to change and redistribute it. .br There is NO WARRANTY, to the extent permitted by law. spi-tools-0.8.4/src/000077500000000000000000000000001357336300400142475ustar00rootroot00000000000000spi-tools-0.8.4/src/Makefile.am000066400000000000000000000002111357336300400162750ustar00rootroot00000000000000bin_PROGRAMS = spi-config spi-pipe spi_config_SOURCES = spi-config.c spi_config_LDADD = spi_pipe_SOURCES = spi-pipe.c spi_pipe_LDADD = spi-tools-0.8.4/src/spi-config.c000066400000000000000000000167221357336300400164610ustar00rootroot00000000000000/* * spidev configuration tool. * * (c) 2014 Christophe BLAESS * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * */ #include #include #include #include #include #include #include #include #include "config.h" static char * project = "spi-config"; typedef struct spi_config { int mode; // [0-3] (-1 when not configured). int lsb; // {0,1} (-1 when not configured). int bits; // [7...] (-1 when not configured). uint32_t speed; // 0 when not configured. int spiready; // {0,1} (-1 when not configured). } spi_config_t; static void display_usage(const char * name) { fprintf(stderr, "usage: %s options...\n", name); fprintf(stderr, " options:\n"); fprintf(stderr, " -d --device= use the given spi-dev character device.\n"); fprintf(stderr, " -q --query print the current configuration.\n"); fprintf(stderr, " -m --mode=[0-3] use the selected spi mode:\n"); fprintf(stderr, " 0: low idle level, sample on leading edge,\n"); fprintf(stderr, " 1: low idle level, sample on trailing edge,\n"); fprintf(stderr, " 2: high idle level, sample on leading edge,\n"); fprintf(stderr, " 3: high idle level, sample on trailing edge.\n"); fprintf(stderr, " -l --lsb={0,1} LSB first (1) or MSB first (0).\n"); fprintf(stderr, " -b --bits=[7...] bits per word.\n"); fprintf(stderr, " -s --speed= set the speed in Hz.\n"); fprintf(stderr, " -r --spirdy={0,1} consider SPI_RDY signal (1) or ignore it (0).\n"); fprintf(stderr, " -w --wait block keeping the file descriptor open to avoid speed reset.\n"); fprintf(stderr, " -h --help this screen.\n"); fprintf(stderr, " -v --version display the version number.\n"); } int main (int argc, char * argv[]) { int opt; int long_index = 0; static struct option options[] = { {"device", required_argument, NULL, 'd' }, {"query", no_argument, NULL, 'q' }, {"help", no_argument, NULL, 'h' }, {"version", no_argument, NULL, 'v' }, {"wait", no_argument, NULL, 'w' }, {"mode", required_argument, NULL, 'm' }, {"lsb", required_argument, NULL, 'l' }, {"bits", required_argument, NULL, 'b' }, {"speed", required_argument, NULL, 's' }, {"spirdy", required_argument, NULL, 'r' }, {0, 0, 0, 0 } }; spi_config_t new_config = { -1, -1, -1, 0, -1 }; spi_config_t config; char * device = NULL; int fd; int val; uint8_t byte; uint32_t u32; int query_only = 0; int wait = 0; while ((opt = getopt_long(argc, argv, "d:qhvwm:l:b:s:r:", options, &long_index)) >= 0) { switch(opt) { case 'q': query_only = 1; break; case 'h': display_usage(argv[0]); exit(EXIT_SUCCESS); case 'v': fprintf(stderr, "%s - %s\n", project, VERSION); exit(EXIT_SUCCESS); case 'd': device = optarg; break; case 'w': wait = 1; break; case 'm': if ((sscanf(optarg, "%d", & val) != 1) || (val < 0) || (val > 3)) { fprintf(stderr, "%s: wrong SPI mode ([0-3])\n", argv[0]); exit(EXIT_FAILURE); } new_config.mode = val; break; case 'l': if ((sscanf(optarg, "%d", & val) != 1) || (val < 0) || (val > 1)) { fprintf(stderr, "%s: wrong LSB first value ([0,1])\n", argv[0]); exit(EXIT_FAILURE); } new_config.lsb = val; break; case 'b': if ((sscanf(optarg, "%d", & val) != 1) || (val < 7)) { fprintf(stderr, "%s: wrong bits per word value [7...]\n", argv[0]); exit(EXIT_FAILURE); } new_config.bits = val; break; case 's': if ((sscanf(optarg, "%d", & val) != 1) || (val < 10) || (val > 100000000)) { fprintf(stderr, "%s: wrong speed value (Hz)\n", argv[0]); exit(EXIT_FAILURE); } new_config.speed = val; break; case 'r': if ((sscanf(optarg, "%d", & val) != 1) || (val < 0) || (val > 1)) { fprintf(stderr, "%s: wrong SPI_RDY value ([0,1])\n", argv[0]); exit(EXIT_FAILURE); } new_config.spiready = val; break; default: fprintf(stderr, "%s: wrong option. Use -h for help.\n", argv[0]); exit(EXIT_FAILURE); } } if (device == NULL) { fprintf(stderr, "%s: no device specified (use option -h for help).\n", argv[0]); exit(EXIT_FAILURE); } fd = open(device, O_RDONLY); if (fd < 0) { perror(device); exit(EXIT_FAILURE); } // Read the previous configuration. if (ioctl(fd, SPI_IOC_RD_MODE, & byte) < 0) { perror("SPI_IOC_RD_MODE"); exit(EXIT_FAILURE); } config.mode = byte; config.spiready = ((config.mode & SPI_READY) ? 1 : 0); // clear the upper flag bits to be left with mode number config.mode &= 0x3; if (ioctl(fd, SPI_IOC_RD_LSB_FIRST, & byte) < 0) { perror("SPI_IOC_RD_LSB_FIRST"); exit(EXIT_FAILURE); } config.lsb = (byte == SPI_LSB_FIRST ? 1 : 0); if (ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, & byte) < 0) { perror("SPI_IOC_RD_BITS_PER_WORD"); exit(EXIT_FAILURE); } config.bits = (byte == 0 ? 8 : byte); if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, & u32) < 0) { perror("SPI_IOC_RD_MAX_SPEED_HZ"); exit(EXIT_FAILURE); } config.speed = u32; if (query_only) { fprintf(stdout, "%s: mode=%d, lsb=%d, bits=%d, speed=%d, spiready=%d\n", device, config.mode, config.lsb, config.bits, config.speed, config.spiready); exit(EXIT_SUCCESS); } // Set the new configuration. if ((config.spiready != new_config.spiready) && (new_config.spiready == 1)) { new_config.mode |= SPI_READY; } if ((config.mode != new_config.mode) || (config.spiready != new_config.spiready)) { // In case only the spiready flag was changed if (new_config.mode == -1) { new_config.mode = config.mode; } if (new_config.spiready == 1) { new_config.mode |= SPI_READY; } byte = new_config.mode; if (ioctl(fd, SPI_IOC_WR_MODE, & byte) < 0) { perror("SPI_IOC_WR_MODE"); exit(EXIT_FAILURE); } } if ((config.lsb != new_config.lsb) && (new_config.lsb != -1)) { byte = (new_config.lsb ? SPI_LSB_FIRST : 0); if (ioctl(fd, SPI_IOC_WR_LSB_FIRST, & byte) < 0) { perror("SPI_IOC_WR_LSB_FIRST"); exit(EXIT_FAILURE); } } if ((config.bits != new_config.bits) && (new_config.bits != -1)) { byte = new_config.bits; if (ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, & byte) < 0) { fprintf(stderr, "Unable to set bits to %d\n", byte); perror("SPI_IOC_WR_BITS_PER_WORD"); exit(EXIT_FAILURE); } } if ((config.speed != new_config.speed) && (new_config.speed != 0)) { u32 = new_config.speed; if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, & u32) < 0) { perror("SPI_IOC_WR_MAX_SPEED_HZ"); fprintf(stderr, "Failed to set speed to %d\n", u32); exit(EXIT_FAILURE); } } if (wait) for (;;) pause(); return EXIT_SUCCESS; } spi-tools-0.8.4/src/spi-pipe.c000066400000000000000000000122111357336300400161360ustar00rootroot00000000000000/* * spidev data transfer tool. * * (c) 2014 Christophe BLAESS * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License along with * this program; if not, write to the Free Software Foundation, Inc., * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. * */ #include #include #include #include #include #include #include #include #include #include #include "config.h" static char * project = "spi-pipe"; static void display_usage(const char * name) { fprintf(stderr, "usage: %s options...\n", name); fprintf(stderr, " options:\n"); fprintf(stderr, " -d --device= use the given spi-dev character device.\n"); fprintf(stderr, " -s --speed= Maximum SPI clock rate (in Hz).\n"); fprintf(stderr, " -b --blocksize= transfer block size in byte.\n"); fprintf(stderr, " -n --number= number of blocks to transfer (-1 = infinite).\n"); fprintf(stderr, " -h --help this screen.\n"); fprintf(stderr, " -v --version display the version number.\n"); } int main (int argc, char * argv[]) { int opt; int long_index = 0; static struct option options[] = { {"device", required_argument, NULL, 'd' }, {"speed", required_argument, NULL, 's' }, {"blocksize", required_argument, NULL, 'b' }, {"number", required_argument, NULL, 'n' }, {"help", no_argument, NULL, 'h' }, {"version", no_argument, NULL, 'v' }, {0, 0, 0, 0 } }; int fd; char * device = NULL; uint8_t * rx_buffer = NULL; uint8_t * tx_buffer = NULL; int blocksize = 1; int blocknumber = -1; int offset = 0; int nb = 0; int speed = -1; int orig_speed = -1; struct spi_ioc_transfer transfer = { .tx_buf = 0, .rx_buf = 0, .len = 0, .delay_usecs = 0, .speed_hz = 0, .bits_per_word = 0, }; while ((opt = getopt_long(argc, argv, "d:s:b:n:rhv", options, &long_index)) >= 0) { switch(opt) { case 'h': display_usage(argv[0]); exit(EXIT_SUCCESS); case 'v': fprintf(stderr, "%s - %s\n", project, VERSION); exit(EXIT_SUCCESS); case 'd': device = optarg; break; case 'b': if ((sscanf(optarg, "%d", & blocksize) != 1) || (blocksize <= 0) || (blocksize > 16384)) { fprintf(stderr, "%s: wrong blocksize\n", argv[0]); exit(EXIT_FAILURE); } break; case 's': if ((sscanf(optarg, "%d", & speed) != 1) || (speed < 10) || (speed > 100000000)) { fprintf(stderr, "%s: Invalid speed\n", argv[0]); exit(EXIT_FAILURE); } break; case 'n': if ((sscanf(optarg, "%d", & blocknumber) != 1) || (blocknumber < -1)) { fprintf(stderr, "%s: wrong block number\n", argv[0]); exit(EXIT_FAILURE); } break; default: fprintf(stderr, "%s: wrong option. Use -h for help.\n", argv[0]); exit(EXIT_FAILURE); } } if (((rx_buffer = malloc(blocksize)) == NULL) || ((tx_buffer = malloc(blocksize)) == NULL)) { fprintf(stderr, "%s: not enough memory to allocate two %d bytes buffers\n", argv[0], blocksize); exit(EXIT_FAILURE); } memset(rx_buffer, 0, blocksize); memset(tx_buffer, 0, blocksize); transfer.rx_buf = (unsigned long)rx_buffer; transfer.tx_buf = (unsigned long)tx_buffer; transfer.len = blocksize; if (device == NULL) { fprintf(stderr, "%s: no device specified (use option -h for help).\n", argv[0]); exit(EXIT_FAILURE); } fd = open(device, O_RDONLY); if (fd < 0) { perror(device); exit(EXIT_FAILURE); } if (speed != -1) { if (ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, & orig_speed) < 0) { perror("SPI_IOC_RD_MAX_SPEED_HZ"); exit(EXIT_FAILURE); } if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, & speed) < 0) { perror("SPI_IOC_WR_MAX_SPEED_HZ"); exit(EXIT_FAILURE); } } while ((blocknumber > 0) || (blocknumber == -1)) { for (offset = 0; offset < blocksize; offset += nb) { nb = read(STDIN_FILENO, & (tx_buffer[offset]), blocksize - offset); if (nb <= 0) break; } if (nb <= 0) break; if (ioctl(fd, SPI_IOC_MESSAGE(1), & transfer) < 0) { perror("SPI_IOC_MESSAGE"); break; } if (write(STDOUT_FILENO, rx_buffer, blocksize) <= 0) break; if (blocknumber > 0) blocknumber --; } if (orig_speed != -1) { if (ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, & orig_speed) < 0) { perror("SPI_IOC_WR_MAX_SPEED_HZ"); exit(EXIT_FAILURE); } } free(rx_buffer); free(tx_buffer); if (blocknumber != 0) return EXIT_FAILURE; return EXIT_SUCCESS; }