Diff: api/PortOut.h

Revision:

144:ef7eb2e8f9f7

Parent:

0:9b334a45a8ff

--- a/api/PortOut.h	Tue Aug 02 14:07:36 2016 +0000
+++ b/api/PortOut.h	Fri Sep 02 15:07:44 2016 +0100
@@ -1,104 +1,109 @@
-/* mbed Microcontroller Library
- * Copyright (c) 2006-2013 ARM Limited
- *
- * 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.
- */
-#ifndef MBED_PORTOUT_H
-#define MBED_PORTOUT_H
-
-#include "platform.h"
-
-#if DEVICE_PORTOUT
-
-#include "port_api.h"
-
-namespace mbed {
-/** A multiple pin digital out
- *
- * Example:
- * @code
- * // Toggle all four LEDs
- *
- * #include "mbed.h"
- *
- * // LED1 = P1.18  LED2 = P1.20  LED3 = P1.21  LED4 = P1.23
- * #define LED_MASK 0x00B40000
- *
- * PortOut ledport(Port1, LED_MASK);
- *
- * int main() {
- *     while(1) {
- *         ledport = LED_MASK;
- *         wait(1);
- *         ledport = 0;
- *         wait(1);
- *     }
- * }
- * @endcode
- */
-class PortOut {
-public:
-
-    /** Create an PortOut, connected to the specified port
-     *
-     *  @param port Port to connect to (Port0-Port5)
-     *  @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
-     */
-    PortOut(PortName port, int mask = 0xFFFFFFFF) {
-        port_init(&_port, port, mask, PIN_OUTPUT);
-    }
-
-    /** Write the value to the output port
-     *
-     *  @param value An integer specifying a bit to write for every corresponding PortOut pin
-     */
-    void write(int value) {
-        port_write(&_port, value);
-    }
-
-    /** Read the value currently output on the port
-     *
-     *  @returns
-     *    An integer with each bit corresponding to associated PortOut pin setting
-     */
-    int read() {
-        return port_read(&_port);
-    }
-
-    /** A shorthand for write()
-     */
-    PortOut& operator= (int value) {
-        write(value);
-        return *this;
-    }
-
-    PortOut& operator= (PortOut& rhs) {
-        write(rhs.read());
-        return *this;
-    }
-
-    /** A shorthand for read()
-     */
-    operator int() {
-        return read();
-    }
-
-private:
-    port_t _port;
-};
-
-} // namespace mbed
-
-#endif
-
-#endif
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * 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.
+ */
+#ifndef MBED_PORTOUT_H
+#define MBED_PORTOUT_H
+
+#include "platform.h"
+
+#if DEVICE_PORTOUT
+
+#include "port_api.h"
+#include "critical.h"
+
+namespace mbed {
+/** A multiple pin digital out
+ *
+ * @Note Synchronization level: Interrupt safe
+ *
+ * Example:
+ * @code
+ * // Toggle all four LEDs
+ *
+ * #include "mbed.h"
+ *
+ * // LED1 = P1.18  LED2 = P1.20  LED3 = P1.21  LED4 = P1.23
+ * #define LED_MASK 0x00B40000
+ *
+ * PortOut ledport(Port1, LED_MASK);
+ *
+ * int main() {
+ *     while(1) {
+ *         ledport = LED_MASK;
+ *         wait(1);
+ *         ledport = 0;
+ *         wait(1);
+ *     }
+ * }
+ * @endcode
+ */
+class PortOut {
+public:
+
+    /** Create an PortOut, connected to the specified port
+     *
+     *  @param port Port to connect to (Port0-Port5)
+     *  @param mask A bitmask to identify which bits in the port should be included (0 - ignore)
+     */
+    PortOut(PortName port, int mask = 0xFFFFFFFF) {
+        core_util_critical_section_enter();
+        port_init(&_port, port, mask, PIN_OUTPUT);
+        core_util_critical_section_exit();
+    }
+
+    /** Write the value to the output port
+     *
+     *  @param value An integer specifying a bit to write for every corresponding PortOut pin
+     */
+    void write(int value) {
+        port_write(&_port, value);
+    }
+
+    /** Read the value currently output on the port
+     *
+     *  @returns
+     *    An integer with each bit corresponding to associated PortOut pin setting
+     */
+    int read() {
+        return port_read(&_port);
+    }
+
+    /** A shorthand for write()
+     */
+    PortOut& operator= (int value) {
+        write(value);
+        return *this;
+    }
+
+    PortOut& operator= (PortOut& rhs) {
+        write(rhs.read());
+        return *this;
+    }
+
+    /** A shorthand for read()
+     */
+    operator int() {
+        return read();
+    }
+
+private:
+    port_t _port;
+};
+
+} // namespace mbed
+
+#endif
+
+#endif