Diff: SO1602A/SO1602A.h

Revision:

0:cb29cf2767cd

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SO1602A/SO1602A.h	Thu Nov 07 11:07:51 2019 +0000
@@ -0,0 +1,86 @@
+/**  SO1602A is Organic-LED, and has 16 chars/line and 2 lines.
+ * 
+ * This librarry supports "printf()" C format.
+ * 
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "SO1602A.h"
+ * I2C i2c(p28, p27);
+ * SO1602A oled(i2c);
+ * DigitalOut led[]= {LED1, LED2, LED3, LED4};
+ * int main()
+ * {
+ *     oled.init();
+ *     int iter= 0;
+ *     while(true) {
+ *         led[0] = !led[0];
+ *         oled.printf("iter: %5.5d.", iter);
+ *         wait(1.0f);
+ *         if(iter%10 == 0)    // 10s
+ *             oled.clear();
+ *         iter++;
+ *     }
+ * }
+ * @endcode
+ */
+
+#pragma once
+
+#include "mbed.h"
+
+// SA0(Pin4); Low: i2c_addr= 0x78, High: 0x7a;
+// DDRAM addr. Line1: 0x00 ~ 0x0f. Line2: 0x20 ~ 0x2f.
+
+class SO1602A : public Stream{
+public:
+    SO1602A (PinName sda, PinName scl, char address= 0x78);
+    SO1602A (I2C &_i2c, char address= 0x78);
+    ~SO1602A();
+//  ******************** printf() future of C-language. ***************************
+
+    /** Initialize
+     */
+    void init();
+
+    /** Clear Display.
+     */
+    void clear();
+    
+    /** Set Position of char.
+     *  @param col: column, row: rows.
+     */
+    void locate(int col, int row);
+    
+    /** Set Contrast.
+     *  @param val; 256steps, 0x00 ~ 0xff. Contrast increas as the value.
+     */
+    void setContrast(char val);
+    
+    /** Set Display flag.
+     * @parm Enable Display, Cursor turned on, Cursor Blink.
+     */
+    void setDispFlag(bool disp= true, bool cursor= true, bool blink= true);
+
+private:    
+    I2C *p_i2c;
+    I2C &i2c;
+    char addr;
+    char buf[3];
+    int col, row;
+    
+    bool cmd(char chr);
+    
+    // virtual func for printf() in Stream-class.
+    virtual int _putc(int val);
+    virtual int _getc();
+    
+// Function SET
+    void setRE();
+    void clearRE();
+    void setSD();
+    void clearSD();
+
+};
+
+// EOF
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