Diff: targets/TARGET_NORDIC/TARGET_MCU_NRF51822/port_api.c

Revision:

149:156823d33999

Parent:

144:ef7eb2e8f9f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_NORDIC/TARGET_MCU_NRF51822/port_api.c	Fri Oct 28 11:17:30 2016 +0100
@@ -0,0 +1,84 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2013 Nordic Semiconductor
+ *
+ * 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"
+#include "pinmap.h"
+#include "gpio_api.h"
+
+PinName port_pin(PortName port, int pin_n)
+{
+    return (PinName)(pin_n);
+}
+
+void port_init(port_t *obj, PortName port, int mask, PinDirection dir)
+{
+    obj->port = port;
+    obj->mask = mask;
+
+    obj->reg_out = &NRF_GPIO->OUT;
+    obj->reg_in  = &NRF_GPIO->IN;
+    obj->reg_cnf = NRF_GPIO->PIN_CNF;
+
+    port_dir(obj, dir);
+}
+
+void port_mode(port_t *obj, PinMode mode)
+{
+    uint32_t i;
+    // The mode is set per pin: reuse pinmap logic
+    for (i = 0; i<31; i++) {
+        if (obj->mask & (1 << i)) {
+            pin_mode(port_pin(obj->port, i), mode);
+        }
+    }
+}
+
+void port_dir(port_t *obj, PinDirection dir)
+{
+    int i;
+    switch (dir) {
+    case PIN_INPUT:
+        for (i = 0; i<31; i++) {
+            if (obj->mask & (1 << i)) {
+                obj->reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+                                    | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+                                    | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
+                                    | (GPIO_PIN_CNF_DIR_Input << GPIO_PIN_CNF_DIR_Pos);
+            }
+        }
+        break;
+    case PIN_OUTPUT:
+        for (i = 0; i<31; i++) {
+            if (obj->mask & (1 << i)) {
+                obj->reg_cnf[i] = (GPIO_PIN_CNF_SENSE_Disabled << GPIO_PIN_CNF_SENSE_Pos)
+                                    | (GPIO_PIN_CNF_DRIVE_S0S1 << GPIO_PIN_CNF_DRIVE_Pos)
+                                    | (GPIO_PIN_CNF_PULL_Disabled << GPIO_PIN_CNF_PULL_Pos)
+                                    | (GPIO_PIN_CNF_INPUT_Connect << GPIO_PIN_CNF_INPUT_Pos)
+                                    | (GPIO_PIN_CNF_DIR_Output << GPIO_PIN_CNF_DIR_Pos);
+            }
+        }
+        break;
+    }
+}
+
+void port_write(port_t *obj, int value)
+{
+    *obj->reg_out = value;
+}
+
+int port_read(port_t *obj)
+{
+    return (*obj->reg_in);
+}