Diff: targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c

Revision:

0:f269e3021894

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c	Sun Oct 23 15:10:02 2016 +0000
@@ -0,0 +1,56 @@
+/***************************************************************************//**
+ * @file pinmap.c
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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 "pinmap.h"
+#include "em_gpio.h"
+#include "em_cmu.h"
+#include "mbed_assert.h"
+
+static int gpio_clock_inited = 0;
+
+void pin_function(PinName pin, int function)
+{
+    //Intentionally left empty. We have repurposed the function field.
+}
+
+void pin_mode(PinName pin, PinMode mode)
+{
+    MBED_ASSERT((0xFFFFFF00 |pin) != NC);
+
+    /* Enable GPIO clock if not already done */
+    if (!gpio_clock_inited) {
+        CMU_ClockEnable(cmuClock_GPIO, true);
+        gpio_clock_inited = 1;
+    }
+
+    /* Pin and port index encoded in one uint32.
+     * First four bits represent the pin number
+     * The remaining bits represent the port number */
+    uint32_t pin_number = (uint32_t) pin;
+    int pin_index = (pin_number & 0xF);
+    int port_index = pin_number >> 4;
+
+    GPIO_PinModeSet(port_index, pin_index, mode & 0xF, GPIO_PinOutGet(port_index, pin_index & 0xF));
+}
+
+// TODO_LP get pin_mode to be able to store previous settings