Diff: extlib/PS2/PS2KB_INIT.h

Revision:

5:61ad1a6be0fd

Parent:

4:47b51250a168

diff -r 47b51250a168 -r 61ad1a6be0fd extlib/PS2/PS2KB_INIT.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extlib/PS2/PS2KB_INIT.h	Sun Jun 07 14:36:40 2020 +0000
@@ -0,0 +1,64 @@
+/**
+ * PS/2 keyboard interface control class (Version 0.0.1)
+ *
+ * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)
+ * http://shinta.main.jp/
+ */
+#ifndef _PS2KB_INIT_H_
+#define _PS2KB_INIT_H_
+
+#include "mbed.h"
+
+/**
+ * PS2 keyboard initializer.
+ */
+class PS2KB_INIT {
+public:
+
+    /**
+     * Create.
+     */
+    PS2KB_INIT(PinName clk_pin, PinName dat_pin);
+
+    /**
+     * Destroy.
+     */
+    ~PS2KB_INIT();
+private:
+    DigitalInOut clk;
+    DigitalInOut dat;
+
+    static const int MAX_RETRY = 1000000;
+
+    /**
+     * Send a byte data.
+     *
+     * @param c a character.
+     *
+     * @return Negative value is a error number.
+     */
+    int send(uint8_t c);
+
+    /**
+     * Receive a byte data.
+     *
+     * @return return a data. Negative value is a error number.
+     */
+    int recv(void);
+
+    /**
+     * Wait a clock down edge.
+     *
+     * @return true if wait done.
+     */
+    bool waitClockDownEdge(void);
+
+    /**
+     * Wait a clock up level.
+     *
+     * @return true if wait done.
+     */
+    bool waitClockUpLevel(void);
+};
+
+#endif