mraa based ledflasher application

BUG=none
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>

Change-Id: I0c14b4ad8c1d5afb401f63f94073bad8e5f24480

2 files changed, 71 insertions, 0 deletions

diff --git a/peripheral/examples/mraa/gpio_output/Android.mk b/peripheral/examples/mraa/gpio_output/Android.mk
index a8d50a5..3733403 100644
--- a/peripheral/examples/mraa/gpio_output/Android.mk
+++ b/peripheral/examples/mraa/gpio_output/Android.mk
@@ -26,3 +26,17 @@ LOCAL_MODULE := example-gpio-output-mraa
 LOCAL_MODULE_TAGS := optional
 LOCAL_SRC_FILES := OutputGPIO.cpp
 include $(BUILD_EXECUTABLE)
+
+
+# MRAA based ledflasher example application
+include $(CLEAR_VARS)
+LOCAL_CPPFLAGS:= -Wno-unused-parameter -fexceptions
+LOCAL_CFLAGS += -DLOG_TAG=\"ledflasher-mraa\" -Wno-unused-parameter
+LOCAL_SHARED_LIBRARIES := libcutils libupm libmraa
+
+LOCAL_MODULE := ledflasher-mraa
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := ledflasher_mraa.cpp
+include $(BUILD_EXECUTABLE)
+
+
diff --git a/peripheral/examples/mraa/gpio_output/ledflasher_mraa.cpp b/peripheral/examples/mraa/gpio_output/ledflasher_mraa.cpp
new file mode 100644
index 0000000..39005f6
--- /dev/null
+++ b/peripheral/examples/mraa/gpio_output/ledflasher_mraa.cpp
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed 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.
+ */
+
+/*
+ * This is an example to flash a number of LED lights in a pattern.
+ * Connect your LEDs to appropriate GPIOs (as many as you like)
+ * then modify gpio[] and m_gpio[] to specify the pins.
+ */
+#include <unistd.h>
+#include <stdio.h>
+
+#include <mraa.h>
+
+int main(int argc, char* argv[]) {
+  const unsigned gpio[] = {0, 1, 2};
+  const int gpio_count = sizeof(gpio)/sizeof(*gpio);
+  mraa_gpio_context m_gpio[] = {NULL, NULL, NULL};
+
+  mraa_init();
+  for (int i = 0; i < gpio_count; i++) {
+    m_gpio[i] = mraa_gpio_init(gpio[i]);
+    if (!m_gpio[i]) {
+      fprintf(stderr, "Unable to initialize GPIO %d, invalid pin number?\n",
+          gpio[i]);
+      return 1;
+    }
+    mraa_gpio_dir(m_gpio[i], MRAA_GPIO_OUT);
+  }
+
+  for (int iterations = 0; iterations < 3; iterations++) {
+    for (int i = 0; i < gpio_count; i++) {
+    mraa_gpio_write(m_gpio[i], 1);
+      sleep(1);
+    }
+    for (int i = gpio_count-1; i >= 0; i--) {
+      mraa_gpio_write(m_gpio[i], 0);
+      sleep(1);
+    }
+  }
+
+  for (int i = 0; i < gpio_count; i++)
+    mraa_gpio_close(m_gpio[i]);
+  return 0;
+}