Diff: targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/port_api.c

Revision:

154:37f96f9d4de2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/port_api.c	Wed Jan 04 16:58:05 2017 +0000
@@ -0,0 +1,87 @@
+/* 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 "port_api.h"
+
+#if DEVICE_PORTIN || DEVICE_PORTOUT
+
+#include "pinmap.h"
+#include "gpio_api.h"
+
+/* Array of GPIO peripheral base address. */
+static GPIO_Type *const port_addrs[] = GPIO_BASE_PTRS;
+
+PinName port_pin(PortName port, int pin_n)
+{
+    return (PinName)((port << GPIO_PORT_SHIFT) | pin_n);
+}
+
+void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
+{
+    obj->port = port;
+    obj->mask = mask;
+
+    // The function is set per pin: reuse gpio logic
+    for (uint32_t i = 0; i < 32; i++) {
+        if (obj->mask & (1 << i)) {
+            gpio_set(port_pin(obj->port, i));
+        }
+    }
+
+    port_dir(obj, dir);
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    // The mode is set per pin: reuse pinmap logic
+    for (uint32_t i = 0; i < 32; i++) {
+        if (obj->mask & (1 << i)) {
+            pin_mode(port_pin(obj->port, i), mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection dir)
+{
+    GPIO_Type *base = port_addrs[obj->port];
+    uint32_t direction = base->PDDR;
+
+    switch (dir) {
+        case PIN_INPUT :
+            direction &= ~obj->mask;
+            break;
+        case PIN_OUTPUT:
+            direction |= obj->mask;
+            break;
+    }
+    base->PDDR = direction;
+}
+
+void port_write(port_t *obj, int value)
+{
+    GPIO_Type *base = port_addrs[obj->port];
+    uint32_t input = base->PDIR & ~obj->mask;
+
+    base->PDOR = (input | (uint32_t)(value & obj->mask));
+}
+
+int port_read(port_t *obj)
+{
+    GPIO_Type *base = port_addrs[obj->port];
+
+    return (int)(base->PDIR & obj->mask);
+}
+
+#endif