Diff: ACM1602NI.cpp

Revision:

0:d14a5eeef3d4

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ACM1602NI.cpp	Sat Jul 11 01:22:12 2015 +0000
@@ -0,0 +1,130 @@
+/* An I2C text LCD library for Displaytronic ACM1602NI-FLW-FBW-M01
+ * Copyright 2013, Takuo WATANABE (wtakuo)
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+ 
+#include "mbed.h"
+#include "ACM1602NI.h"
+ 
+#define I2C_SUCCESS 0
+#define I2C_FAILURE 1
+ 
+ACM1602NI::ACM1602NI(PinName sda, PinName scl) : _i2c(sda, scl)
+{
+    init();
+}
+ 
+ACM1602NI::ACM1602NI(I2C &i2c) : _i2c(i2c)
+{
+    init();
+}
+ 
+void ACM1602NI::init()
+{
+    writeCommand(0x01);
+    wait_ms(i2c_command_wait_ms);
+    writeCommand(0x38);
+    wait_ms(i2c_command_wait_ms);
+    writeCommand(0x0f);
+    wait_ms(i2c_command_wait_ms);
+    writeCommand(0x06);
+    wait_ms(i2c_command_wait_ms);
+    locate(0, 0);
+}
+ 
+int ACM1602NI::writeBytes(const char *data, int length, bool repeated)
+{
+    wait_us(i2c_bit_wait_us);
+    _i2c.start();
+    for (int i = 0; i < length; i++) {
+        wait_us(i2c_bit_wait_us);
+        if (_i2c.write(data[i]) != 1) {
+            wait_us(i2c_bit_wait_us);
+            _i2c.stop();
+            return I2C_FAILURE;
+        }
+    }
+    if (!repeated) {
+        wait_us(i2c_bit_wait_us);
+        _i2c.stop();
+    }
+    return I2C_SUCCESS;
+}
+ 
+void ACM1602NI::character(int column, int row, int c)
+{
+    writeCommand(address(column, row));
+    writeData(c);
+}
+ 
+void ACM1602NI::cls()
+{
+    writeCommand(0x01);
+    wait_ms(i2c_command_wait_ms);
+    locate(0, 0);
+}
+ 
+void ACM1602NI::locate(int column, int row)
+{
+    _column = column;
+    _row = row;
+}
+ 
+int ACM1602NI::_putc(int value)
+{
+    if (value == '\n') {
+        _column = 0;
+        _row = (_row + 1) % rows();
+    } else {
+        character(_column, _row, value);
+        _column++;
+        if (_column >= columns()) {
+            _column = 0;
+            _row = (_row + 1) % rows();
+        }
+    }
+    return value;
+}
+ 
+int ACM1602NI::_getc()
+{
+    return -1;
+}
+ 
+void ACM1602NI::writeCommand(int command)
+{
+    char bs[3] = { i2c_addr, 0x00, command };
+    writeBytes(bs, 3);
+}
+ 
+void ACM1602NI::writeData(int data)
+{
+    char bs[3] = { i2c_addr, 0x80, data };
+    writeBytes(bs, 3);
+}
+ 
+int ACM1602NI::address(int column, int row)
+{
+    return 0x80 + row * 0x40 + column;
+}
+ 
+int ACM1602NI::columns()
+{
+    return display_columns;
+}
+ 
+int ACM1602NI::rows()
+{
+    return display_rows;
+}