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

Revision:

0:9b334a45a8ff

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/pinmap.c	Thu Oct 01 15:25:22 2015 +0300
@@ -0,0 +1,63 @@
+/***************************************************************************//**
+ * @file pinmap.c
+ *******************************************************************************
+ * @section License
+ * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b>
+ *******************************************************************************
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ *    claim that you wrote the original software.
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ *    misrepresented as being the original software.
+ * 3. This notice may not be removed or altered from any source distribution.
+ *
+ * DISCLAIMER OF WARRANTY/LIMITATION OF REMEDIES: Silicon Labs has no
+ * obligation to support this Software. Silicon Labs is providing the
+ * Software "AS IS", with no express or implied warranties of any kind,
+ * including, but not limited to, any implied warranties of merchantability
+ * or fitness for any particular purpose or warranties against infringement
+ * of any proprietary rights of a third party.
+ *
+ * Silicon Labs will not be liable for any consequential, incidental, or
+ * special damages, or any other relief, or for any claim by any third party,
+ * arising from your use of this Software.
+ *
+ ******************************************************************************/
+
+#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