Revision 0:933748ca1307, committed 2016-04-24

Comitter:

kazz12211

Date:

Sun Apr 24 11:50:38 2016 +0000

Commit message:

Simple class for AQM1602XA I2C LCD.

Changed in this revision

diff -r 000000000000 -r 933748ca1307 AQM1602XA.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AQM1602XA.cpp	Sun Apr 24 11:50:38 2016 +0000
@@ -0,0 +1,44 @@
+#include "AQM1602XA.h"
+
+AQM1602XA::AQM1602XA(PinName sda, PinName scl, char slave_adr)
+    : wire(sda, scl) {
+    address = slave_adr;
+    initialize();
+}
+
+
+void AQM1602XA::writeCommand(char cmd) {
+    char bytes[2];
+    bytes[0] = 0x00;
+    bytes[1] = cmd;
+    wire.write(address, bytes, 2);
+    wait(0.01);
+}
+        
+void AQM1602XA::writeData(char data) {
+    char bytes[2];
+    bytes[0] = 0x40;
+    bytes[1] = data;
+    wire.write(address, bytes, 2);
+    wait(0.001);
+}
+
+void AQM1602XA::initialize() {
+    char cmd[] =  {0x38, 0x39, 0x14, 0x73, 0x56, 0x6c, 0x38, 0x01, 0x0c};
+    wait(0.1);
+    for(int i = 0; i < 9; i++) {
+        writeCommand(cmd[i]);
+    }    
+}
+
+void AQM1602XA::printString(int row, char *str) {
+    int len = strlen(str);
+    if(len > 16)
+        len = 16;
+    if(row == 1) {
+        writeCommand(0x40 + 0x80);
+    }
+    for(int i = 0; i < len; i++) {
+        writeData(*(str + i));
+    }
+}
\ No newline at end of file

diff -r 000000000000 -r 933748ca1307 AQM1602XA.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/AQM1602XA.h	Sun Apr 24 11:50:38 2016 +0000
@@ -0,0 +1,40 @@
+/**
+ * Simple class to handle I2C 16 chars x 2 rows Character LCD
+ * By K. Tsubaki
+ * Date: 2016/04/24
+ * Tested with: mbed LPC1114
+ * Usage: 
+ *        mbed <---> LCD
+ *        dp5  <---> SDA
+ *        dp27 <---> SCL
+ *        VIN  <---> +V
+ *        GND  <---> GND
+ **/
+#ifndef __AQM1602XA__
+
+#include "mbed.h"
+
+#define AQM1602XA_ADDR          (0x3E << 1)
+
+class AQM1602XA {
+    private:
+        I2C         wire;
+        char        address;
+        
+        void initialize(void);
+        void writeCommand(char cmd);
+        void writeData(char data);
+    public:
+        /**
+         * Constructor - default device address is 0x3E
+         **/
+        AQM1602XA(PinName sda, PinName scl, char slave_adr = AQM1602XA_ADDR);
+        /**
+         * print characters on the LCD
+         * params: row (0 or 1)
+         *         str - string to show on the LCD. The length is up to 16 characters
+         **/
+        void printString(int row, char *str);
+};
+
+#endif