Diff: targets/hal/TARGET_ARM_SSG/TARGET_BEETLE/gpio_api.c

Revision:

144:ef7eb2e8f9f7

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/hal/TARGET_ARM_SSG/TARGET_BEETLE/gpio_api.c	Fri Sep 02 15:07:44 2016 +0100
@@ -0,0 +1,92 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2015 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 "gpio_api.h"
+#include "pinmap.h"
+
+// function to enable the GPIO pin
+uint32_t gpio_set(PinName pin) {
+    uint32_t pin_value = 0;
+
+    if(pin <= 15) {
+        pin_value = pin;
+    } else if (pin >= 16 && pin <= 31) {
+        pin_value = pin-16;
+    } else if (pin >= 1001 && pin <= 1004) {
+        /* Emulated LEDs */
+        return (1);
+    }
+
+    pin_function(pin, 0);
+
+    return (1 << pin_value);
+}
+
+//function to initialise the gpio pin
+// this links the board control bits for each pin
+// with the object created for the pin
+void gpio_init(gpio_t *obj, PinName pin) {
+    if (pin == NC) {
+        return;
+    } else {
+        int pin_value = 0;
+        obj->pin = pin;
+        if (pin <=15) {
+            pin_value = pin;
+        } else if (pin >= 16 && pin <= 31) {
+            pin_value = pin-16;
+        } else if (pin >= 1001 && pin <= 1004) {
+            /* Emulated LEDs */
+            return;
+        }
+
+        obj->mask = 0x1 << pin_value;
+        obj->pin_number = pin;
+        if (pin <=15) {
+            obj->reg_data = &CMSDK_GPIO0->DATAOUT;
+            obj->reg_in = &CMSDK_GPIO0->DATA;
+            obj->reg_dir = &CMSDK_GPIO0->OUTENABLESET;
+            obj->reg_dirclr = &CMSDK_GPIO0->OUTENABLECLR;
+        } else if (pin >= 16 && pin <= 31) {
+            obj->reg_data = &CMSDK_GPIO1->DATAOUT;
+            obj->reg_in = &CMSDK_GPIO1->DATA;
+            obj->reg_dir = &CMSDK_GPIO1->OUTENABLESET;
+            obj->reg_dirclr = &CMSDK_GPIO1->OUTENABLECLR;
+        }
+    }
+}
+
+void gpio_mode(gpio_t *obj, PinMode mode) {
+    pin_mode(obj->pin, mode);
+}
+
+void gpio_dir(gpio_t *obj, PinDirection direction) {
+    if(obj->pin >= 0 && obj->pin <= 31) {
+        switch (direction) {
+            case PIN_INPUT : *obj->reg_dirclr = obj->mask; break;
+            case PIN_OUTPUT: *obj->reg_dir |= obj->mask; break;
+        }
+    } else {
+        return;
+    }
+}
+
+int gpio_is_connected(const gpio_t *obj){
+    if(obj->pin != (PinName)NC){
+        return 1;
+    } else {
+        return 0;
+    }
+}