Revision 0:c45ad83e1c32, committed 2010-10-14

Comitter:

okini3939

Date:

Thu Oct 14 14:45:16 2010 +0000

Child:

1:16e014cddf29

Commit message:

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2CLCD/I2CLCD.cpp	Thu Oct 14 14:45:16 2010 +0000
@@ -0,0 +1,174 @@
+/*
+ * mbed library to use a I2C LCD
+ * Copyright (c) 2010 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+
+#include "mbed.h"
+#include "I2CLCD.h"
+
+#define I2CLCD_ADDR 0x7c
+
+
+int I2CLCD::_putc (int value) {
+
+    if (value == '\n') {
+        x = 0;
+        y ++;
+        if (y >= rows()) {
+            y = 0;
+            lcd_out(address(x, y), 0);
+        }
+
+    } else {
+
+        lcd_out(address(x, y), 0);
+        lcd_out(value, 1);
+        x ++;
+        if (x >= cols()) {
+            x = 0;
+            y ++;
+            if (y >= rows()) {
+                y = 0;
+                lcd_out(address(x, y), 0);
+            }
+        }
+    }
+
+    return value;
+}
+
+int I2CLCD::_getc() {
+    return lcd_in(0);
+}
+
+
+I2CLCD::I2CLCD (PinName p_sda, PinName p_scl, I2CLCDType p_type, I2CLCDConfig p_config) : i2c(p_sda, p_scl) {
+    init(p_type, p_config);
+}
+
+I2CLCD::I2CLCD (I2C& p_i2c, I2CLCDType p_type, I2CLCDConfig p_config) : i2c(p_i2c) {
+    init(p_type, p_config);
+}
+
+void I2CLCD::init (I2CLCDType p_type, I2CLCDConfig p_config) {
+
+    type = p_type;
+
+    lcd_cfg(p_config);
+
+    wait(0.5);
+    lcd_out(0x30, 0);
+    wait(0.005);
+    lcd_out(0x30, 0);
+    wait(0.002);
+    lcd_out(0x30, 0);
+
+    lcd_out(0x38, 0); // func 
+    lcd_out(0x10, 0); // shift
+    lcd_out(0x0c, 0); // display
+    lcd_out(0x06, 0); // entry mode
+    cls();
+}
+
+void I2CLCD::cls() {
+    lcd_out(0x01, 0); // clear
+    wait(0.002);
+    lcd_out(0x02, 0); // home
+    wait(0.002);
+    locate(0, 0);
+}
+
+void I2CLCD::locate(int col, int row) {
+    x = col;
+    y = row;
+    lcd_out(address(x, y), 0);
+}
+
+int I2CLCD::address(int col, int row) {
+    switch (type) {
+        case LCD16x1:
+            return (col < 8 ? 0x80 : 0xc0) + (col & 0x03);
+        case LCD16x4:
+        case LCD20x4:
+            switch (row) {
+                case 0:
+                    return 0x80 + col;
+                case 1:
+                    return 0xc0 + col;
+                case 2:
+                    return 0x94 + col;
+                case 3:
+                    return 0xd4 + col;
+            }
+        case LCD16x2B:
+            return 0x80 + (row * 40) + col;
+        case LCD8x2:
+        case LCD16x2:
+        case LCD20x2:
+        default:
+            return 0x80 + (row * 0x40) + col;
+    }
+}
+
+int I2CLCD::cols() {
+    switch (type) {
+        case LCD8x2:
+            return 8;
+        case LCD20x4:
+        case LCD20x2:
+            return 20;
+        case LCD16x1:
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD16x4:
+        default:
+            return 16;
+    }
+}
+
+int I2CLCD::rows() {
+    switch (type) {
+        case LCD16x1:
+            return 1;
+        case LCD16x4:
+        case LCD20x4:
+            return 4;
+        case LCD8x2:
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD20x2:
+        default:
+            return 2;
+    }
+}
+
+void I2CLCD::lcd_cfg (I2CLCDConfig cfg) {
+    i2c.start();
+    i2c.write(I2CLCD_ADDR);
+    i2c.write(LCDCFG_ENABLE | (cfg & 0x1f));
+    i2c.stop();
+}
+
+void I2CLCD::lcd_out (int dat, int rs) {
+    i2c.start();
+    i2c.write(I2CLCD_ADDR);
+    i2c.write(rs ? 0x40 : 0);
+    i2c.write(dat);
+    i2c.stop();
+}
+
+int I2CLCD::lcd_in (int rs) {
+    int i;
+
+    i2c.start();
+    i2c.write(I2CLCD_ADDR);
+    i2c.write(rs ? 0x40 : 0);
+
+    i2c.start();
+    i2c.write(I2CLCD_ADDR | 0x01);
+    i = i2c.read(0);
+    i2c.stop();
+
+    return i;
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/I2CLCD/I2CLCD.h	Thu Oct 14 14:45:16 2010 +0000
@@ -0,0 +1,56 @@
+/*
+ * mbed library to use a I2C LCD
+ * Copyright (c) 2010 Hiroshi Suga
+ * Released under the MIT License: http://mbed.org/license/mit
+ */
+ 
+#ifndef I2CLCD_H
+#define I2CLCD_H
+
+#include "mbed.h"
+
+enum I2CLCDType {
+    LCD8x2,
+    LCD16x1,
+    LCD16x2,
+    LCD16x2B,
+    LCD16x4,
+    LCD20x2,
+    LCD20x4
+};
+
+enum I2CLCDConfig {
+    LCDCFG_ENABLE   = 0x20,
+    LCDCFG_PWMCOUNT = 0x10,
+    LCDCFG_LED      = 0x08,
+    LCDCFG_3V       = 0x04,
+    LCDCFG_ADDR     = 0x02,
+    LCDCFG_INIT     = 0x01
+};
+
+class I2CLCD : public Stream {
+public:
+    I2CLCD (PinName p_sda, PinName p_scl, I2CLCDType p_type = LCD16x2, I2CLCDConfig p_config = LCDCFG_3V);
+    I2CLCD (I2C& p_i2c, I2CLCDType p_type = LCD16x2, I2CLCDConfig p_config = LCDCFG_3V);
+
+    void locate (int, int);
+    void cls ();
+    void lcd_cfg (I2CLCDConfig);
+
+protected:
+    virtual int _putc (int);
+    virtual int _getc ();
+
+    int address (int, int);
+    int rows ();
+    int cols ();
+    void init (I2CLCDType, I2CLCDConfig);
+    void lcd_out (int, int);
+    int lcd_in (int);
+
+    I2C i2c;
+    I2CLCDType type;
+    int x, y;
+};
+
+#endif
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Oct 14 14:45:16 2010 +0000
@@ -0,0 +1,26 @@
+#include "mbed.h"
+#include "I2CLCD.h"
+
+I2C i2c(p9, p10);
+I2CLCD i2clcd(i2c);
+/*
+DigitalOut pullup1(p19);
+DigitalOut pullup2(p20);
+*/
+//I2CLCD i2clcd(p9, p10);
+
+DigitalOut myled(LED1);
+
+int main() {
+    int i = 1;
+   
+//    pullup1 = pullup2 = 1;
+
+    myled = 1;
+    i2clcd.putc('0' + i);
+    i2clcd.putc('A' + i);
+    i2clcd.putc('a' + i);
+    myled = 0;
+
+    for (;;);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Thu Oct 14 14:45:16 2010 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/e2ac27c8e93e