Diff: lcd.cpp

Revision:

0:2053640461b5

Child:

1:ec416e6d5739

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/lcd.cpp	Sat May 17 12:54:13 2014 +0000
@@ -0,0 +1,88 @@
+#include "mbed.h"
+
+
+I2C i2c(dp5, dp27); // sda, scl
+
+const int AQM0802_addr = 0x7C;
+
+void lcd_cmd(char x)
+{
+  char data[2];
+  data[0] = 0x00; // CO = 0,RS = 0
+  data[1] = x;
+  i2c.write(AQM0802_addr, data, 2);
+}
+
+void lcd_contdata(char x)
+{
+  char data[2];
+  data[0] = 0xC0; //0b11000000 CO = 1, RS = 1
+  data[1] = x;
+  i2c.write(AQM0802_addr, data, 2);
+}
+
+void lcd_lastdata(char x)
+{
+  char data[2];
+  data[0] = 0x40; //0b11000000 CO = 0, RS = 1
+  data[1] = x;
+  i2c.write(AQM0802_addr, data, 2);
+}
+
+void lcd_printStr(const char *s)
+{
+  while(*s) {
+    if(*(s + 1)) {
+      lcd_contdata(*s);
+    } else {
+      lcd_lastdata(*s);
+    }
+    s++;
+  }
+}
+
+void lcd_setContrast(unsigned char c) {
+  lcd_cmd(0x39);
+  lcd_cmd(0x70 | (c & 0x0f)); // contrast Low
+  lcd_cmd(0x5C | ((c >> 4) & 0x03)); // contast High/icon/power
+  lcd_cmd(0x38);
+}
+
+void lcd_printHex(unsigned char num)
+{
+  lcd_contdata(num);
+}
+
+void lcd_init() {
+  int cont = 0;
+  wait(0.04);
+  // LCD initialize
+  lcd_cmd(0x38); // function set
+  lcd_cmd(0x39); // function set
+  lcd_cmd(0x04); // EntryModeSet
+  lcd_cmd(0x14); // interval osc
+  lcd_cmd(0x70 | (cont & 0xF)); // contrast Low
+  lcd_cmd(0x5C | ((cont >> 4) & 0x3)); // contast High/icon/power
+  lcd_cmd(0x6C); // follower control
+  wait(0.2);
+  lcd_cmd(0x38); // function set
+  lcd_cmd(0x0C); // Display On
+  lcd_cmd(0x01); // Clear Display
+  wait(0.2); // need additional wait to Clear Display
+  
+  lcd_setContrast(36);
+
+}
+
+void lcd_setCursor(unsigned char x,unsigned char y) {
+  lcd_cmd(0x80 | (y * 0x40 + x));
+}
+
+void lcd_cls(void)
+{
+    lcd_setCursor(0, 0);
+    lcd_printStr("        ");
+    lcd_setCursor(0, 1);
+    lcd_printStr("        ");
+}
+