Diff: ACM1602NI.cpp

Revision:

0:aac87cbfc229

Child:

1:84527dcd3fcc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ACM1602NI.cpp	Mon May 13 12:50:42 2013 +0000
@@ -0,0 +1,99 @@
+#include "mbed.h"
+#include "ACM1602NI.h"
+
+#define _i2cSUCCESS 0
+#define _i2cFAILURE 1
+
+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 _i2cFAILURE;
+        }
+    }
+    if (!repeated) {
+        wait_us(i2c_bit_wait_us);
+        _i2c.stop();
+    }
+    return _i2cSUCCESS;
+}
+
+void ACM1602NI::character(int column, int row, int c) {
+    int a = address(column, row);
+    writeCommand(a);
+    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;
+}
+