[DeviceDrivers] Add pin io driver framework

1 files changed, 79 insertions, 0 deletions

diff --git a/components/drivers/include/drivers/pin.h b/components/drivers/include/drivers/pin.h
new file mode 100644
index 0000000000..7e1fd4e825
--- /dev/null
+++ b/components/drivers/include/drivers/pin.h
@@ -0,0 +1,79 @@
+/*
+ * File      : pin.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2015, RT-Thread Development Team
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2015-01-20     Bernard      the first version
+ */
+
+#ifndef PIN_H__
+#define PIN_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* pin device and operations for RT-Thread */
+struct rt_device_pin
+{
+    struct rt_device parent;
+    const struct rt_pin_ops *ops;
+};
+
+#define PIN_LOW                 0x00
+#define PIN_HIGH                0x01
+
+#define PIN_MODE_OUTPUT         0x00
+#define PIN_MODE_INPUT          0x01
+#define PIN_MODE_INPUT_PULLUP   0x02
+
+struct rt_device_pin_mode
+{
+    rt_uint16_t pin;
+    rt_uint16_t mode;
+};
+struct rt_device_pin_status
+{
+    rt_uint16_t pin;
+    rt_uint16_t status;
+};
+
+struct rt_pin_ops
+{
+    void (*pin_mode) (struct rt_device* device, rt_base_t pin, rt_base_t mode);
+    void (*pin_write)(struct rt_device* device, rt_base_t pin, rt_base_t value);
+    int  (*pin_read) (struct rt_device* device, rt_base_t pin);
+
+    /* TODO: add GPIO interrupt */
+};
+
+int rt_device_pin_register(const char* name, const struct rt_pin_ops* ops, void* user_data);
+
+void rt_pin_mode(rt_base_t pin, rt_base_t mode);
+void rt_pin_write(rt_base_t pin, rt_base_t value);
+int  rt_pin_read (rt_base_t pin);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif