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authorChristian Mauderer <christian.mauderer@embedded-brains.de>2020-11-18 08:36:48 +0100
committerJan Sommer <jan.sommer@dlr.de>2021-03-31 10:43:48 +0200
commita274b6fdcb7b39b3d67aad33dba0360a47f20204 (patch)
tree31d12ec76f4ac1efe77883074908e49b710393d1
parentec2660548eea901e2159cf8dd3f8cd4ddd8aa6be (diff)
downloadrtems-5.tar.bz2
shell: Add i2c and spi commands5
This adds some commands that are usefull for debugging simple serial interfaces. Even if they are a complete re-implementation, the i2c* commands use a simmilar call like the Linux i2c tools. Closes #4371
-rw-r--r--cpukit/Makefile.am4
-rw-r--r--cpukit/include/rtems/shellconfig.h28
-rw-r--r--cpukit/libmisc/shell/main_i2cdetect.c107
-rw-r--r--cpukit/libmisc/shell/main_i2cget.c145
-rw-r--r--cpukit/libmisc/shell/main_i2cset.c124
-rw-r--r--cpukit/libmisc/shell/main_spi.c157
6 files changed, 565 insertions, 0 deletions
diff --git a/cpukit/Makefile.am b/cpukit/Makefile.am
index 51f38c84c7..18eda95543 100644
--- a/cpukit/Makefile.am
+++ b/cpukit/Makefile.am
@@ -1483,6 +1483,10 @@ librtemscpu_a_SOURCES += libmisc/shell/login_prompt.c
librtemscpu_a_SOURCES += libmisc/shell/login_check.c
librtemscpu_a_SOURCES += libmisc/shell/fdisk.c
librtemscpu_a_SOURCES += libmisc/shell/main_rtc.c
+librtemscpu_a_SOURCES += libmisc/shell/main_spi.c
+librtemscpu_a_SOURCES += libmisc/shell/main_i2cdetect.c
+librtemscpu_a_SOURCES += libmisc/shell/main_i2cset.c
+librtemscpu_a_SOURCES += libmisc/shell/main_i2cget.c
librtemscpu_a_SOURCES += libmisc/shell/dd-args.c
librtemscpu_a_SOURCES += libmisc/shell/main_dd.c
librtemscpu_a_SOURCES += libmisc/shell/dd-conv.c
diff --git a/cpukit/include/rtems/shellconfig.h b/cpukit/include/rtems/shellconfig.h
index 3e87d472d6..c5fcf4a45e 100644
--- a/cpukit/include/rtems/shellconfig.h
+++ b/cpukit/include/rtems/shellconfig.h
@@ -78,6 +78,10 @@ extern rtems_shell_cmd_t rtems_shell_DF_Command;
extern rtems_shell_cmd_t rtems_shell_MD5_Command;
extern rtems_shell_cmd_t rtems_shell_RTC_Command;
+extern rtems_shell_cmd_t rtems_shell_SPI_Command;
+extern rtems_shell_cmd_t rtems_shell_I2CDETECT_Command;
+extern rtems_shell_cmd_t rtems_shell_I2CGET_Command;
+extern rtems_shell_cmd_t rtems_shell_I2CSET_Command;
extern rtems_shell_cmd_t rtems_shell_SHUTDOWN_Command;
extern rtems_shell_cmd_t rtems_shell_CPUINFO_Command;
@@ -521,6 +525,30 @@ extern rtems_shell_alias_t * const rtems_shell_Initial_aliases[];
&rtems_shell_RTC_Command,
#endif
+ #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) \
+ && !defined(CONFIGURE_SHELL_NO_COMMAND_SPI)) \
+ || defined(CONFIGURE_SHELL_COMMAND_SPI)
+ &rtems_shell_SPI_Command,
+ #endif
+
+ #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) \
+ && !defined(CONFIGURE_SHELL_NO_COMMAND_I2CDETECT)) \
+ || defined(CONFIGURE_SHELL_COMMAND_I2CDETECT)
+ &rtems_shell_I2CDETECT_Command,
+ #endif
+
+ #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) \
+ && !defined(CONFIGURE_SHELL_NO_COMMAND_I2CGET)) \
+ || defined(CONFIGURE_SHELL_COMMAND_I2CGET)
+ &rtems_shell_I2CGET_Command,
+ #endif
+
+ #if (defined(CONFIGURE_SHELL_COMMANDS_ALL) \
+ && !defined(CONFIGURE_SHELL_NO_COMMAND_I2CSET)) \
+ || defined(CONFIGURE_SHELL_COMMAND_I2CSET)
+ &rtems_shell_I2CSET_Command,
+ #endif
+
/*
* System related commands
*/
diff --git a/cpukit/libmisc/shell/main_i2cdetect.c b/cpukit/libmisc/shell/main_i2cdetect.c
new file mode 100644
index 0000000000..e953b4eaef
--- /dev/null
+++ b/cpukit/libmisc/shell/main_i2cdetect.c
@@ -0,0 +1,107 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2020 embedded brains GmbH.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+/*
+ * The command implemented here has a similar interface like the one from Linux
+ * i2c tools. Think of it as a heavily simplified version of them. Instead of
+ * the bus number they expect a bus path.
+ */
+
+#include <dev/i2c/i2c.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <rtems/shell.h>
+
+static const char rtems_i2cdetect_shell_usage [] =
+ "i2cdetect <I2C_BUS>\n"
+ "\ttry to detect i2c devices on the given bus\n";
+
+static int rtems_i2cdetect_shell_main(int argc, char *argv[])
+{
+ int fd;
+ int rv;
+ const char *bus;
+ const uint16_t first = 1;
+ const uint16_t last = 0x7f;
+ uint16_t current;
+
+ if (argc != 2 || strcmp(argv[1], "-h") == 0) {
+ printf(rtems_i2cdetect_shell_usage);
+ return 1;
+ }
+
+ bus = argv[1];
+ fd = open(bus, O_RDWR);
+ if (fd < 0) {
+ perror("Couldn't open bus");
+ return 1;
+ }
+
+ printf(" x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF\n"
+ "0x ");
+ for (current = first; current <= last; ++current) {
+ i2c_msg msg = {
+ .addr = current,
+ .flags = 0,
+ .len = 0,
+ .buf = NULL,
+ };
+
+ struct i2c_rdwr_ioctl_data payload = {
+ .msgs = &msg,
+ .nmsgs = 1,
+ };
+
+ if ((current & 0x0F) == 0) {
+ printf("\n%1xx ", current >> 4);
+ }
+
+ rv = ioctl(fd, I2C_RDWR, &payload);
+ if (rv < 0) {
+ if (errno != EIO) {
+ perror("ioctl failed");
+ }
+ printf(" --");
+ } else {
+ printf(" %02x", current);
+ }
+ }
+ printf("\n");
+ close(fd);
+
+ return 0;
+}
+
+rtems_shell_cmd_t rtems_shell_I2CDETECT_Command = {
+ .name = "i2cdetect",
+ .usage = rtems_i2cdetect_shell_usage,
+ .topic = "misc",
+ .command = rtems_i2cdetect_shell_main,
+};
diff --git a/cpukit/libmisc/shell/main_i2cget.c b/cpukit/libmisc/shell/main_i2cget.c
new file mode 100644
index 0000000000..ffa551308b
--- /dev/null
+++ b/cpukit/libmisc/shell/main_i2cget.c
@@ -0,0 +1,145 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2020 embedded brains GmbH.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+/*
+ * The command implemented here has a similar interface like the one from Linux
+ * i2c tools. Think of it as a heavily simplified version of them. Instead of
+ * the bus number they expect a bus path.
+ *
+ * Additionally the i2cget has a continuous read mode that isn't available on
+ * Linux but does something similar to i2cdump.
+ */
+
+#include <dev/i2c/i2c.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <rtems/shell.h>
+
+static const char rtems_i2cget_shell_usage [] =
+ "i2cget <I2C_BUS> <CHIP-ADDRESS> <DATA-ADDRESS> [<NR-BYTES>]\n"
+ "\tGet one or more bytes from an EEPROM like i2c device.\n"
+ "\tNote that multiple bytes will be read in continuous mode.\n";
+
+static int read_bytes(
+ int fd,
+ uint16_t i2c_address,
+ uint8_t data_address,
+ uint16_t nr_bytes
+)
+{
+ int rv;
+ uint8_t value[nr_bytes];
+ i2c_msg msgs[] = {{
+ .addr = i2c_address,
+ .flags = 0,
+ .buf = &data_address,
+ .len = 1,
+ }, {
+ .addr = i2c_address,
+ .flags = I2C_M_RD,
+ .buf = value,
+ .len = nr_bytes,
+ }};
+ struct i2c_rdwr_ioctl_data payload = {
+ .msgs = msgs,
+ .nmsgs = sizeof(msgs)/sizeof(msgs[0]),
+ };
+ uint16_t i;
+
+ rv = ioctl(fd, I2C_RDWR, &payload);
+ if (rv < 0) {
+ perror("ioctl failed");
+ } else {
+ for (i = 0; i < nr_bytes; ++i) {
+ printf("0x%02x ", value[i]);
+ }
+ printf("\n");
+ }
+
+ return rv;
+}
+
+static int rtems_i2cget_shell_main(int argc, char *argv[])
+{
+ int fd;
+ int rv;
+ const char *bus;
+ uint16_t chip_address;
+ uint8_t data_address;
+ uint16_t nr_bytes;
+
+ if (argc < 4 || argc > 5) {
+ printf(rtems_i2cget_shell_usage);
+ return 1;
+ }
+
+ errno = 0;
+ chip_address = (uint16_t) strtoul(argv[2], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read chip address");
+ return 1;
+ }
+
+ errno = 0;
+ data_address = (uint8_t) strtoul(argv[3], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read data address");
+ return 1;
+ }
+
+ nr_bytes = 1;
+ if (argc == 5) {
+ errno = 0;
+ nr_bytes = (uint16_t) strtoul(argv[4], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read number of bytes");
+ return 1;
+ }
+ }
+
+ bus = argv[1];
+ fd = open(bus, O_RDWR);
+ if (fd < 0) {
+ perror("Couldn't open bus");
+ return 1;
+ }
+
+ rv = read_bytes(fd, chip_address, data_address, nr_bytes);
+
+ close(fd);
+
+ return rv;
+}
+
+rtems_shell_cmd_t rtems_shell_I2CGET_Command = {
+ .name = "i2cget",
+ .usage = rtems_i2cget_shell_usage,
+ .topic = "misc",
+ .command = rtems_i2cget_shell_main,
+};
diff --git a/cpukit/libmisc/shell/main_i2cset.c b/cpukit/libmisc/shell/main_i2cset.c
new file mode 100644
index 0000000000..d9025b3b28
--- /dev/null
+++ b/cpukit/libmisc/shell/main_i2cset.c
@@ -0,0 +1,124 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2020 embedded brains GmbH.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+/*
+ * The command implemented here has a similar interface like the one from Linux
+ * i2c tools. Think of it as a heavily simplified version of them. Instead of
+ * the bus number they expect a bus path.
+ *
+ * Additionally it is possible to write multiple values as a continuous write.
+ */
+
+#include <dev/i2c/i2c.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <rtems/shell.h>
+
+static const char rtems_i2cset_shell_usage [] =
+ "i2cset <I2C_BUS> <CHIP-ADDRESS> <DATA-ADDRESS> <VALUE> [<VALUE> [...]]\n"
+ "\tset one byte of an EEPROM like i2c device\n";
+
+static int
+rtems_i2cset_shell_main(int argc, char *argv[])
+{
+ int fd;
+ int rv;
+ const char *bus;
+ uint16_t chip_address;
+ /* Necessary: data-address and values. This will be a bit more. */
+ uint8_t writebuff[argc];
+ size_t len;
+ size_t i;
+ i2c_msg msgs[] = {{
+ .flags = 0,
+ .buf = writebuff,
+ .len = 0,
+ }};
+ struct i2c_rdwr_ioctl_data payload = {
+ .msgs = msgs,
+ .nmsgs = sizeof(msgs)/sizeof(msgs[0]),
+ };
+
+ if (argc < 5) {
+ printf(rtems_i2cset_shell_usage);
+ return 1;
+ }
+
+ errno = 0;
+ chip_address = (uint16_t) strtoul(argv[2], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read CHIP_ADDRESS");
+ return 1;
+ }
+ msgs[0].addr = chip_address;
+
+ errno = 0;
+ writebuff[0] = (uint8_t) strtoul(argv[3], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read DATA_ADDRESS");
+ return 1;
+ }
+
+ /* Read values starting from the fifth argument (index 4) */
+ i = 4;
+ len = 0;
+ while (i < argc) {
+ errno = 0;
+ writebuff[len + 1] = (uint8_t) strtoul(argv[i], NULL, 0);
+ if (errno != 0) {
+ perror("Couldn't read VALUE");
+ return 1;
+ }
+ ++i;
+ ++len;
+ }
+ msgs[0].len = len + 1; /* Don't forget address */
+
+ bus = argv[1];
+ fd = open(bus, O_RDWR);
+ if (fd < 0) {
+ perror("Couldn't open bus");
+ return 1;
+ }
+
+ rv = ioctl(fd, I2C_RDWR, &payload);
+ if (rv < 0) {
+ perror("ioctl failed");
+ }
+ close(fd);
+
+ return rv;
+}
+
+rtems_shell_cmd_t rtems_shell_I2CSET_Command = {
+ .name = "i2cset",
+ .usage = rtems_i2cset_shell_usage,
+ .topic = "misc",
+ .command = rtems_i2cset_shell_main,
+};
diff --git a/cpukit/libmisc/shell/main_spi.c b/cpukit/libmisc/shell/main_spi.c
new file mode 100644
index 0000000000..487a22fc6c
--- /dev/null
+++ b/cpukit/libmisc/shell/main_spi.c
@@ -0,0 +1,157 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2020 embedded brains GmbH.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. 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.
+ *
+ * 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.
+ */
+
+#include <dev/spi/spi.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <rtems/shell.h>
+
+static const char rtems_spi_shell_usage [] =
+ "simple SPI read / write\n"
+ "\n"
+ "spi [-loh] [-c <cs>] [-s <speed>] [-m <mode>] <SPI_BUS> xx [xx [..]]\n"
+ " <SPI_BUS> Bus device to use\n"
+ " xx Hex value of a byte to send\n"
+ " -c <cs> Use chip select <cs> (default: None)\n"
+ " -m <mode> Use SPI mode <mode> (default: 0)\n"
+ " -l Send LSB first\n"
+ " -o Use loopback mode\n"
+ " -s <speed> Bus speed in hz\n"
+ " -h Print this help\n";
+
+static int rtems_spi_shell_main(int argc, char *argv[])
+{
+ uint8_t buffer[argc - 1];
+ size_t len = 0;
+ int i;
+ size_t j;
+ int rv;
+ int fd;
+ char *bus = NULL;
+ unsigned long mode;
+ spi_ioc_transfer msg = {
+ .len = 0,
+ .rx_buf = buffer,
+ .tx_buf = buffer,
+ .speed_hz = 100000,
+ .bits_per_word = 8,
+ .cs_change = true,
+ .mode = SPI_MODE_0 | SPI_NO_CS,
+ };
+
+ for (i = 1; i < argc; ++i) {
+ if (argv[i][0] == '-') {
+ switch (argv[i][1]) {
+ case ('c'):
+ errno = 0;
+ msg.mode &= ~SPI_NO_CS;
+ msg.cs = (uint8_t) strtoul(argv[i+1], NULL, 0);
+ ++i;
+ if (errno != 0) {
+ printf("Couldn't process chip select\n");
+ return 1;
+ }
+ break;
+ case ('m'):
+ errno = 0;
+ mode = strtoul(argv[i+1], NULL, 0);
+ ++i;
+ if (errno != 0 || mode > 3) {
+ printf("Couldn't process mode\n");
+ return 1;
+ }
+ msg.mode &= ~(SPI_CPOL | SPI_CPHA);
+ msg.mode |= mode;
+ break;
+ case ('s'):
+ errno = 0;
+ msg.speed_hz = (uint32_t) strtoul(argv[i+1], NULL, 0);
+ ++i;
+ if (errno != 0) {
+ printf("Couldn't process speed\n");
+ return 1;
+ }
+ break;
+ case ('l'):
+ msg.mode |= SPI_LSB_FIRST;
+ break;
+ case ('o'):
+ msg.mode |= SPI_LOOP;
+ break;
+ case ('h'):
+ /* fallthrough */
+ default:
+ printf(rtems_spi_shell_usage);
+ return 1;
+ }
+ } else if (bus == NULL) {
+ bus = argv[i];
+ } else {
+ errno = 0;
+ buffer[len] = (uint8_t) strtol(argv[i], NULL, 16);
+ if (errno != 0) {
+ printf("Couldn't process '%s'\n", argv[i]);
+ return 1;
+ }
+ ++len;
+ }
+ }
+
+ if (len == 0) {
+ printf("Nothing to do\n");
+ return 0;
+ }
+
+ fd = open(bus, O_RDWR);
+ if (fd < 0) {
+ perror("Couldn't open bus");
+ return 1;
+ }
+ msg.len = len;
+ rv = ioctl(fd, SPI_IOC_MESSAGE(1), &msg);
+ if (rv == -1) {
+ perror("Couldn't send the message");
+ } else {
+ printf("received:");
+ for (j = 0; j < len; ++j) {
+ printf(" %02x", buffer[j]);
+ }
+ printf("\n");
+ }
+ close(fd);
+
+ return 0;
+}
+
+rtems_shell_cmd_t rtems_shell_SPI_Command = {
+ .name = "spi",
+ .usage = rtems_spi_shell_usage,
+ .topic = "misc",
+ .command = rtems_spi_shell_main,
+};