Diff: pin_port.cpp

Revision:

0:5b6a266f2211

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pin_port.cpp	Mon Dec 21 07:42:10 2015 +0000
@@ -0,0 +1,40 @@
+/* A function for finding the port and bit position of a pin
+ * Copyright 2015, Takuo Watanabe
+ *
+ * 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.
+ */
+
+#include "mbed.h"
+#include "pin_port.h"
+
+int pin_port(PinName pin, PortName *port) {
+#if defined(TARGET_LPC176X)
+    int p = pin - LPC_GPIO0_BASE;
+    *port = (PortName)(p >> PORT_SHIFT);
+    return p & ((1 << PORT_SHIFT) - 1);
+#elif defined(TARGET_LPC11UXX)
+    *port = (PortName)((int)pin >> PORT_SHIFT);
+    return ((1 << PORT_SHIFT) - 1) & (int)pin;
+#elif defined(TARGET_KLXX)
+    *port = (PortName)((int)pin >> PORT_SHIFT);
+    return (((1 << PORT_SHIFT) - 1) & (int)pin) >> 2;
+#elif defined(TARGET_KPSDK_MCUS)
+    *port = (PortName)((int)pin >> GPIO_PORT_SHIFT);
+    return ((1 << GPIO_PORT_SHIFT) - 1) & (int)pin;
+#elif defined(TARGET_STM32F4)
+    *port = (PortName)((int)pin >> 4);
+    return 0xf & (int)pin;
+#else
+#error "Unsupported target"
+#endif
+}