Merge pull request #2948 from balanceTWK/master_capture

[components][drivers] add input capture driven framework

2 files changed, 64 insertions, 0 deletions

diff --git a/components/drivers/include/drivers/rt_inputcapture.h b/components/drivers/include/drivers/rt_inputcapture.h
new file mode 100644
index 0000000000..0cadf6444c
--- /dev/null
+++ b/components/drivers/include/drivers/rt_inputcapture.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2006-2018, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2019-08-13     balanceTWK   first version.
+ */
+
+#ifndef __RT_INPUT_CAPTURE_H__
+#define __RT_INPUT_CAPTURE_H__
+
+#include <rtthread.h>
+#include <rtdevice.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* capture control command */
+#define INPUTCAPTURE_CMD_CLEAR_BUF        (128 + 0)    /* clear capture buf */
+#define INPUTCAPTURE_CMD_SET_WATERMARK    (128 + 1)    /* Set the callback threshold */
+
+struct rt_inputcapture_data
+{
+    rt_uint32_t pulsewidth_us;
+    rt_bool_t   is_high;
+};
+
+struct rt_inputcapture_device
+{
+    struct rt_device                    parent;
+
+    const struct rt_inputcapture_ops    *ops;
+    struct rt_ringbuffer                *ringbuff;
+    rt_size_t                           watermark;
+};
+
+/**
+ * capture operators
+ */
+struct rt_inputcapture_ops
+{
+    rt_err_t (*init)(struct rt_inputcapture_device *inputcapture);
+    rt_err_t (*open)(struct rt_inputcapture_device *inputcapture);
+    rt_err_t (*close)(struct rt_inputcapture_device *inputcapture);
+    rt_err_t (*get_pulsewidth)(struct rt_inputcapture_device *inputcapture, rt_uint32_t *pulsewidth_us);
+};
+
+void rt_hw_capture_isr(struct rt_inputcapture_device *inputcapture, rt_bool_t level);
+
+rt_err_t rt_device_inputcapture_register(struct rt_inputcapture_device *inputcapture,
+                                         const char                    *name,
+                                         void                          *data);
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __RT_INPUT_CAPTURE_H__ */
diff --git a/components/drivers/include/rtdevice.h b/components/drivers/include/rtdevice.h
index 0c009e9580..bb302ac2af 100644
--- a/components/drivers/include/rtdevice.h
+++ b/components/drivers/include/rtdevice.h
@@ -130,6 +130,10 @@ extern "C" {
 #include "drivers/encoder.h"
 #endif
 
+#ifdef RT_USING_INPUT_CAPTURE
+#include "drivers/rt_inputcapture.h"
+#endif
+
 #ifdef __cplusplus
 }
 #endif