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new a3dfef117 apps/examples:Add keyboard example
a3dfef117 is described below
commit a3dfef117bb4e25b7a5a40519bd33075b670c3f1
Author: liuhongchao <[email protected]>
AuthorDate: Mon Aug 7 16:53:51 2023 +0800
apps/examples:Add keyboard example
Signed-off-by: liuhongchao <[email protected]>
---
examples/keyboard/Kconfig | 20 ++++++
examples/keyboard/Make.defs | 23 +++++++
examples/keyboard/Makefile | 34 +++++++++
examples/keyboard/kbd_main.c | 159 +++++++++++++++++++++++++++++++++++++++++++
4 files changed, 236 insertions(+)
diff --git a/examples/keyboard/Kconfig b/examples/keyboard/Kconfig
new file mode 100644
index 000000000..208907e42
--- /dev/null
+++ b/examples/keyboard/Kconfig
@@ -0,0 +1,20 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config EXAMPLES_KEYBOARD
+ tristate "Keyboard example"
+ default n
+ ---help---
+ Enable the keyboard example
+
+if EXAMPLES_KEYBOARD
+
+config EXAMPLES_KEYBOARD_DEVPATH
+ string "Keyboard device path"
+ default "/dev/kbd0"
+ ---help---
+ The path to the keyboard device. Default: "/dev/kbd0"
+
+endif
diff --git a/examples/keyboard/Make.defs b/examples/keyboard/Make.defs
new file mode 100644
index 000000000..0310f739e
--- /dev/null
+++ b/examples/keyboard/Make.defs
@@ -0,0 +1,23 @@
+############################################################################
+# apps/examples/keyboard/Make.defs
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_KEYBOARD),)
+CONFIGURED_APPS += $(APPDIR)/examples/keyboard
+endif
diff --git a/examples/keyboard/Makefile b/examples/keyboard/Makefile
new file mode 100644
index 000000000..8010d71a1
--- /dev/null
+++ b/examples/keyboard/Makefile
@@ -0,0 +1,34 @@
+############################################################################
+# apps/examples/keyboard/Makefile
+#
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership. The
+# ASF licenses this file to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance with the
+# License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+############################################################################
+
+include $(APPDIR)/Make.defs
+
+# Keyboard built-in application info
+
+PROGNAME = kbd
+PRIORITY = SCHED_PRIORITY_DEFAULT
+STACKSIZE = $(CONFIG_DEFAULT_TASK_STACKSIZE)
+MODULE = $(CONFIG_EXAMPLES_KEYBOARD)
+
+# Keyboard Example
+
+MAINSRC = kbd_main.c
+
+include $(APPDIR)/Application.mk
diff --git a/examples/keyboard/kbd_main.c b/examples/keyboard/kbd_main.c
new file mode 100644
index 000000000..a1624e844
--- /dev/null
+++ b/examples/keyboard/kbd_main.c
@@ -0,0 +1,159 @@
+/****************************************************************************
+ * apps/examples/keyboard/kbd_main.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <debug.h>
+
+#include <nuttx/input/keyboard.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Data
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: kbd_main
+ ****************************************************************************/
+
+int main(int argc, FAR char *argv[])
+{
+ struct keyboard_event_s sample;
+ ssize_t nbytes;
+ long nsamples = 0;
+ int fd;
+ int errval = 0;
+
+ if (argc > 1)
+ {
+ nsamples = strtol(argv[1], NULL, 10);
+ }
+
+ printf("kbd_main: nsamples: %ld\n", nsamples);
+
+ /* Open the keyboard device for reading */
+
+ printf("kbd_main: Opening %s\n", CONFIG_EXAMPLES_KEYBOARD_DEVPATH);
+ fd = open(CONFIG_EXAMPLES_KEYBOARD_DEVPATH, O_RDONLY);
+ if (fd < 0)
+ {
+ printf("kbd_main: open %s failed: %d\n",
+ CONFIG_EXAMPLES_KEYBOARD_DEVPATH, errno);
+ errval = 2;
+ goto errout;
+ }
+
+ /* Now loop the appropriate number of times, displaying the collected
+ * keyboard samples.
+ */
+
+ for (; ; )
+ {
+ /* Flush any output before the loop entered or from the previous pass
+ * through the loop.
+ */
+
+ fflush(stdout);
+
+ /* Read one sample */
+
+ iinfo("Reading...\n");
+ nbytes = read(fd, &sample, sizeof(struct keyboard_event_s));
+ iinfo("Bytes read: %zd\n", nbytes);
+
+ /* Handle unexpected return values */
+
+ if (nbytes < 0)
+ {
+ errval = errno;
+ if (errval != EINTR)
+ {
+ printf("kbd_main: read %s failed: %d\n",
+ CONFIG_EXAMPLES_KEYBOARD_DEVPATH, errval);
+ errval = 3;
+ goto errout_with_dev;
+ }
+
+ printf("kbd_main: Interrupted read...\n");
+ }
+ else if (nbytes != sizeof(struct keyboard_event_s))
+ {
+ printf("kbd_main: Unexpected read size=%zd, expected=%zd, "
+ "Ignoring\n",
+ nbytes, sizeof(struct keyboard_event_s));
+ }
+
+ /* Print the sample data on successful return */
+
+ else
+ {
+ printf("Sample :\n");
+ printf(" code : %d\n", sample.code);
+ printf(" type : %d\n", sample.type);
+ }
+
+ if (nsamples && --nsamples <= 0)
+ {
+ break;
+ }
+ }
+
+errout_with_dev:
+ close(fd);
+
+errout:
+ printf("Terminating!\n");
+ fflush(stdout);
+ return errval;
+}
