Diff: targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c

Revision:

525:c320967f86b9

Child:

548:1abac31e188e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c	Tue Apr 28 11:45:12 2015 +0100
@@ -0,0 +1,48 @@
+/* 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.
+ */
+#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(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