From cc565da5a178d598d35cc9b7d4a1a36be5fb17f5 Mon Sep 17 00:00:00 2001
From: tangweikang <tangweikang@rt-thread.com>
Date: Fri, 9 Aug 2019 18:37:16 +0800
Subject: [components][drivers] add encoder driven framework

---
 components/drivers/include/drivers/encoder.h | 65 ++++++++++++++++++++++++++++
 components/drivers/include/rtdevice.h        |  4 ++
 2 files changed, 69 insertions(+)
 create mode 100644 components/drivers/include/drivers/encoder.h

(limited to 'components/drivers/include')

diff --git a/components/drivers/include/drivers/encoder.h b/components/drivers/include/drivers/encoder.h
new file mode 100644
index 0000000000..c6c3e4d708
--- /dev/null
+++ b/components/drivers/include/drivers/encoder.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-08-08     balanceTWK   the first version
+ */
+
+#ifndef __ENCODER_H__
+#define __ENCODER_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* encoder control command */
+typedef enum
+{
+    ENCODER_INFO_GET = 0x01,        /* get a encoder feature information */
+    ENCODER_SWITCH_ON,              /* switch on encoder */
+    ENCODER_SWITCH_OFF,             /* switch off encoder */
+    ENCODER_COUNT_CLEAR,            /* clear encoder count */
+} rt_encoder_ctrl_t;
+
+/* encoder type */
+typedef enum
+{
+    SINGLE_PHASE_ENCODER = 0x01,    /* single phase encoder */
+    AB_PHASE_ENCODER                /* two phase encoder */
+} rt_encoder_type_t;
+
+struct rt_encoder_device;
+
+struct rt_encoder_ops
+{
+    rt_err_t (*init)(struct rt_encoder_device *encoder);
+    rt_int32_t (*get_count)(struct rt_encoder_device *encoder);
+    rt_err_t (*control)(struct rt_encoder_device *encoder, rt_uint32_t cmd, void *args);
+};
+
+/* Encoder feature information */
+struct rt_encoder_info
+{
+    rt_encoder_type_t type;    /* the type of encoder */
+};
+
+typedef struct rt_encoder_device
+{
+    struct rt_device parent;
+    const struct rt_encoder_ops *ops;
+    const struct rt_encoder_info *info;
+} rt_encoder_t;
+
+rt_err_t rt_device_encoder_register(rt_encoder_t *encoder, const char *name, void *user_data);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __ENCODER_H__ */
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index f764d30c24..0c009e9580 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -126,6 +126,10 @@ extern "C" {
 #include "drivers/crypto.h"
 #endif
 
+#ifdef RT_USING_ENCODER
+#include "drivers/encoder.h"
+#endif
+
 #ifdef __cplusplus
 }
 #endif
-- 
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