Diff: I2CLEDDisp.cpp

Revision:

0:eae10b76cd72

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2CLEDDisp.cpp	Thu Oct 21 11:51:14 2010 +0000
@@ -0,0 +1,133 @@
+/*
+ * mbed library for I2C LED Display
+ * Copyright (c) 2010 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * This product includes:
+ * mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, sford
+ */
+
+#include "mbed.h"
+#include "I2CLEDDisp.h"
+
+
+int I2CLEDDisp::_putc (int value) {
+
+    if (value == '\n') {
+		locate(0, 0);
+
+    } else {
+
+        disp_out(value, address(x, y));
+        x ++;
+        if (x >= cols()) {
+            x = 0;
+        }
+
+		if (ctrl & LEDDISP_CONTROL_ATTRIB && (ctrl & 0x03) != LEDDISP_CONTROL_AB) {
+	        disp_out(0x80 | disp_in(address(x, y)), address(x, y));
+		}
+
+    }
+
+    return value;
+}
+
+int I2CLEDDisp::_getc() {
+	int i;
+
+	i = disp_in(x);
+    x ++;
+    if (x >= cols()) {
+        x = 0;
+    }
+    return i;
+}
+
+
+I2CLEDDisp::I2CLEDDisp (PinName p_sda, PinName p_scl, int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) : i2c(p_sda, p_scl) {
+    init(p_i2caddr, p_type, p_ctrl);
+}
+
+I2CLEDDisp::I2CLEDDisp (I2C& p_i2c, int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) : i2c(p_i2c) {
+    init(p_i2caddr, p_type, p_ctrl);
+}
+
+void I2CLEDDisp::init (int p_i2caddr, I2CLEDDispType p_type, I2CLEDDispControl p_ctrl) {
+
+	i2caddr = p_i2caddr;
+    type = p_type;
+    ctrl = p_ctrl;
+
+    cls();
+}
+
+void I2CLEDDisp::cls() {
+	int i;
+	
+	for (i = 0; i < type; i ++) {
+	    disp_out(LEDDISP_CONTROL_CLEAR, i << 4);
+	    disp_out(ctrl, i << 4);
+	}
+    locate(0, 0);
+}
+
+void I2CLEDDisp::locate(int col, int row) {
+	if (ctrl & LEDDISP_CONTROL_ATTRIB && (ctrl & 0x03) != LEDDISP_CONTROL_AB) {
+        disp_out(~0x80 & disp_in(address(x, y)), address(x, y));
+	    x = col;
+	    y = row;
+        disp_out(0x80 | disp_in(address(x, y)), address(x, y));
+	} else {
+	    x = col;
+	    y = row;
+	}
+}
+
+int I2CLEDDisp::address(int col, int row) {
+	return ((col & 0x0c) << 2) | 0x04 | (~col & 0x03);
+}
+
+int I2CLEDDisp::cols() {
+	return 4 * type;
+}
+
+int I2CLEDDisp::rows() {
+	return 1;
+}
+
+void I2CLEDDisp::disp_cfg (I2CLEDDispConfig cfg) {
+	int i;
+	
+	for (i = 0; i < type; i ++) {
+    	i2c.start();
+    	i2c.write(i2caddr + (i << 1));
+    	i2c.write(LEDDISPCFG_ENABLE | (cfg & 0x71));
+    	i2c.stop();
+	}
+}
+
+void I2CLEDDisp::disp_out (int dat, int addr) {
+    i2c.start();
+    i2c.write(i2caddr | (addr >> 3));
+    i2c.write(addr & 0x07);
+    i2c.write(dat);
+    i2c.stop();
+}
+
+int I2CLEDDisp::disp_in (int rs) {
+    int i;
+
+    i2c.start();
+    i2c.write(i2caddr | (addr >> 3));
+    i2c.write(addr & 0x07);
+
+    i2c.start();
+    i2c.write(i2caddr | (addr >> 3) | 0x01);
+    i = i2c.read(0);
+    i2c.stop();
+
+    return i;
+}
+