Diff: targets/TARGET_STM/gpio_object.h

Revision:

157:ff67d9f36b67

Child:

160:d5399cc887bb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_STM/gpio_object.h	Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,85 @@
+/* mbed Microcontroller Library
+ *******************************************************************************
+ * Copyright (c) 2016, STMicroelectronics
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ * 3. Neither the name of STMicroelectronics nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *******************************************************************************
+ */
+#ifndef MBED_GPIO_OBJECT_H
+#define MBED_GPIO_OBJECT_H
+
+#include "mbed_assert.h"
+#include "cmsis.h"
+#include "PortNames.h"
+#include "PeripheralNames.h"
+#include "PinNames.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * Note: reg_clr might actually be same as reg_set.
+ * Depends on family whether BRR is available on top of BSRR
+ * if BRR does not exist, family shall define GPIO_DOES_NOT_HAVE_BRR
+ */
+typedef struct {
+    PinName  pin;
+    uint32_t mask;
+    __IO uint32_t *reg_in;
+    __IO uint32_t *reg_set;
+    __IO uint32_t *reg_clr;
+} gpio_t;
+
+static inline void gpio_write(gpio_t *obj, int value)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    if (value) {
+        *obj->reg_set = obj->mask;
+    } else {
+#ifdef GPIO_IP_WITHOUT_BRR
+        *obj->reg_clr = obj->mask << 16;
+#else
+        *obj->reg_clr = obj->mask;
+#endif
+    }
+}
+
+static inline int gpio_read(gpio_t *obj)
+{
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    return ((*obj->reg_in & obj->mask) ? 1 : 0);
+}
+
+static inline int gpio_is_connected(const gpio_t *obj)
+{
+    return obj->pin != (PinName)NC;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif