Diff: PCF2119.cpp

Revision:

9:27f430d086f3

Parent:

7:44f34c09bd37

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCF2119.cpp	Wed Jul 09 03:54:42 2014 +0000
@@ -0,0 +1,195 @@
+/* PCF2119x based I2C LCD Library
+ * Copyright (c) 2014, Hiroshi Suga
+ */
+/* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2007-2010, sford, http://mbed.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "PCF2119.h"
+#include "mbed.h"
+
+PCF2119::PCF2119(PinName sda, PinName sck, PinName reset, LCDType type, char addr) :
+        _i2c(sda, sck), _reset(reset), _type(type), _addr(addr) {
+    init();
+}
+
+PCF2119::PCF2119(I2C &i2c, PinName reset, LCDType type, char addr) :
+        _i2c(i2c), _reset(reset), _type(type), _addr(addr) {
+    init();
+}
+
+void PCF2119::init() {
+    unsigned char buf[12];
+
+    _reset = 1;
+    wait(0.001);
+    _reset = 0;
+    wait(0.015);        // Wait 15ms to ensure powered up
+
+    raw = 0;
+    buf[0]  = 0x00; // CO=0, RS=0
+    buf[1]  = 0x34; // Function_set     DL=1, M=1, SL=0, (H=0)
+    buf[2]  = 0x0c; // Display_ctl      D=1, C=1, B=0
+    buf[3]  = 0x06; // Entry_mode_set   ID=1, S=0
+    buf[4]  = 0x35; // Function_set     DL=1, M=1, SL=0, (H=1)
+    buf[5]  = 0x04; // Disp_conf        P=0, Q=0
+    buf[6]  = 0x10; // Temp_ctl         TC1=0, TC2=0
+    buf[7]  = 0x42; // HV_gen           S1=1, S2=0
+    buf[8]  = 0x9f; // VLCD_set         V=0, VA=1f
+    buf[9]  = 0x34; // Function_set     DL=1, M=1, SL=0, (H=0)
+    buf[10] = 0x80; // set DDRAM
+    buf[11] = 0x02; // Screen_conf      L=0
+    _i2c.write(_addr, (char*)buf, 12);
+    cls();
+}
+
+void PCF2119::character(int column, int row, int c) {
+    unsigned char buf[2];
+    buf[0] = 0x00; // CO=0, RS=0
+    buf[1] = address(column, row);
+    _i2c.write(_addr, (char*)buf, 2);
+    writeData(c);
+}
+
+void PCF2119::cls() {
+    char buf[2];
+    buf[0] = 0x00; // CO=0, RS=0
+    buf[1] = 0x01;
+    _i2c.write(_addr, buf, 2);
+    locate(0, 0);
+}
+
+void PCF2119::locate(int column, int row) {
+    _column = column;
+    _row = row;
+}
+
+int PCF2119::_putc(int value) {
+    if (value == '\n') {
+        _column = 0;
+        _row++;
+        if (_row >= rows()) {
+            _row = 0;
+        }
+    } else {
+        character(_column, _row, ascii2lcd(value));
+        _column++;
+        if (_column >= columns()) {
+            _column = 0;
+            _row++;
+            if (_row >= rows()) {
+                _row = 0;
+            }
+        }
+    }
+    return value;
+}
+
+int PCF2119::_getc() {
+    return -1;
+}
+
+void PCF2119::writeCommand(int command) {
+    unsigned char buf[2];
+    buf[0] = 0x00; // CO=0, RS=0
+    buf[1] = command;
+    _i2c.write(_addr, (char*)buf, 2);
+}
+
+void PCF2119::writeData(int data) {
+    unsigned char buf[2];
+    buf[0] = 0x40; // CO=0, RS=1
+    buf[1] = data;
+    _i2c.write(_addr, (char*)buf, 2);
+}
+
+int PCF2119::address(int column, int row) {
+    switch (_type) {
+        case LCD20x4:
+            switch (row) {
+                case 0:
+                    return 0x80 + column;
+                case 1:
+                    return 0xc0 + column;
+                case 2:
+                    return 0x94 + column;
+                case 3:
+                    return 0xd4 + column;
+            }
+        case LCD16x2B:
+            return 0x80 + (row * 40) + column;
+        case LCD16x2:
+        case LCD20x2:
+        default:
+            return 0x80 + (row * 0x40) + column;
+    }
+}
+
+int PCF2119::columns() {
+    switch (_type) {
+        case LCD20x4:
+        case LCD20x2:
+            return 20;
+        case LCD16x2:
+        case LCD16x2B:
+        default:
+            return 16;
+    }
+}
+
+int PCF2119::rows() {
+    switch (_type) {
+        case LCD20x4:
+            return 4;
+        case LCD16x2:
+        case LCD16x2B:
+        case LCD20x2:
+        default:
+            return 2;
+    }
+}
+
+int PCF2119::ascii2lcd (int c) {
+    if (raw) return c;
+    if (((c >= ' ') && (c <= '?')) || ((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z'))) {
+        c |= 0x80;
+    } else
+    if (c >= 0xf0 && c <= 0xff) {
+        c &= 0x0f;
+    }
+    return c;
+}
+
+void PCF2119::cgram(int num, const char *data, int len) {
+    int i;
+    unsigned char buf[1 + len];
+    buf[0] = 0x00; // CO=0, RS=0
+    buf[1] = 0x80 | (num >= 8 ? 0x40 : 0);
+    _i2c.write(_addr, (char*)buf, 2);
+    buf[0] = 0x00; // CO=0, RS=0
+    buf[1] = 0x40 | (8 * (num % 8));
+    _i2c.write(_addr, (char*)buf, 2);
+    buf[0] = 0x40; // CO=0, RS=1
+    for (i = 0; i < len; i ++) {
+        buf[1 + i] = data[i];
+    }
+    _i2c.write(_addr, (char*)buf, 1 + len);
+}