Import Mbed OS hard-float snapshot

targets/TARGET_Silicon_Labs/TARGET_EFM32/port_api.c

@@ -0,0 +1,89 @@
+/***************************************************************************//**
+ * @file port_api.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 "device.h"
+#if DEVICE_PORTOUT
+
+#include "port_api.h"
+#include "pinmap.h"
+#include "gpio_api.h"
+#include "em_gpio.h"
+#include "em_cmu.h"
+
+#define PORT_NUM_PINS 16
+
+PinName port_pin(PortName port, int pin_n)
+{
+    return (PinName) (pin_n | port << 4); // Encode pin and port number in one uint32
+}
+
+void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
+{
+    obj->mask = mask;
+    obj->port = port;
+    obj->dir = dir;
+    
+    port_dir(obj, obj->dir);
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    /* Set mode for pins given by mask */
+    uint32_t pin;
+    for (pin = 0; pin < PORT_NUM_PINS; pin++) {
+        if (obj->mask & (1 << pin)) {
+            pin_mode(port_pin(obj->port, pin), mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection dir)
+{
+    obj->dir = dir;
+
+    /* Set default pin mode for pins given by mask */
+    switch (dir) {
+        case PIN_INPUT:
+            port_mode(obj, Input);
+            break;
+        case PIN_OUTPUT:
+            port_mode(obj, PushPull);
+            break;
+    }
+}
+
+void port_write(port_t *obj, int value)
+{
+    GPIO_PortOutSetVal(obj->port, value, obj->mask);
+}
+
+int port_read(port_t *obj)
+{
+    if (obj->dir == PIN_INPUT) {
+        return (int) (GPIO_PortInGet(obj->port) & obj->mask);
+    } else {
+        return (int) (GPIO_PortOutGet(obj->port) & obj->mask);
+    }
+}
+
+#endif