Kazutaka "Zak" Sawa / ACM1602NI

An I2C text LCD library for Displaytronic ACM1602NI-FLW-FBW-M01 MOD by Zak

Dependents:   mbed_XBus_Test

Fork of ACM1602NI by Takuo WATANABE

ACM1602NI.cpp@4:33a8ca14e0e0, 2013-12-14 (annotated)

Committer:
takuo
Date:
Sat Dec 14 14:45:38 2013 +0000
Revision:
4:33a8ca14e0e0
Parent:
3:bac80efb323e
Child:
5:c1dbbc2af9dd
Fixed the documents

Who changed what in which revision?

UserRevisionLine numberNew contents of line
takuo 3:bac80efb323e 1 /* An I2C text LCD library for Displaytronic ACM1602NI-FLW-FBW-M01
takuo 3:bac80efb323e 2 * Copyright 2013, Takuo WATANABE (wtakuo)
takuo 1:84527dcd3fcc 3 *
takuo 1:84527dcd3fcc 4 * Licensed under the Apache License, Version 2.0 (the "License");
takuo 1:84527dcd3fcc 5 * you may not use this file except in compliance with the License.
takuo 1:84527dcd3fcc 6 * You may obtain a copy of the License at
takuo 1:84527dcd3fcc 7 *
takuo 1:84527dcd3fcc 8 * http://www.apache.org/licenses/LICENSE-2.0
takuo 1:84527dcd3fcc 9 *
takuo 1:84527dcd3fcc 10 * Unless required by applicable law or agreed to in writing, software
takuo 1:84527dcd3fcc 11 * distributed under the License is distributed on an "AS IS" BASIS,
takuo 1:84527dcd3fcc 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
takuo 1:84527dcd3fcc 13 * See the License for the specific language governing permissions and
takuo 1:84527dcd3fcc 14 * limitations under the License.
takuo 1:84527dcd3fcc 15 */
takuo 1:84527dcd3fcc 16
takuo 0:aac87cbfc229 17 #include "mbed.h"
takuo 0:aac87cbfc229 18 #include "ACM1602NI.h"
takuo 0:aac87cbfc229 19
takuo 4:33a8ca14e0e0 20 #define I2C_SUCCESS 0
takuo 4:33a8ca14e0e0 21 #define I2C_FAILURE 1
takuo 0:aac87cbfc229 22
takuo 4:33a8ca14e0e0 23 ACM1602NI::ACM1602NI(I2C &i2c): _i2c(i2c)
takuo 4:33a8ca14e0e0 24 {
takuo 0:aac87cbfc229 25 init();
takuo 0:aac87cbfc229 26 }
takuo 0:aac87cbfc229 27
takuo 4:33a8ca14e0e0 28 void ACM1602NI::init()
takuo 4:33a8ca14e0e0 29 {
takuo 0:aac87cbfc229 30 writeCommand(0x01);
takuo 0:aac87cbfc229 31 wait_ms(i2c_command_wait_ms);
takuo 0:aac87cbfc229 32 writeCommand(0x38);
takuo 0:aac87cbfc229 33 wait_ms(i2c_command_wait_ms);
takuo 0:aac87cbfc229 34 writeCommand(0x0f);
takuo 0:aac87cbfc229 35 wait_ms(i2c_command_wait_ms);
takuo 0:aac87cbfc229 36 writeCommand(0x06);
takuo 0:aac87cbfc229 37 wait_ms(i2c_command_wait_ms);
takuo 0:aac87cbfc229 38 locate(0, 0);
takuo 0:aac87cbfc229 39 }
takuo 0:aac87cbfc229 40
takuo 4:33a8ca14e0e0 41 int ACM1602NI::writeBytes(const char *data, int length, bool repeated)
takuo 4:33a8ca14e0e0 42 {
takuo 0:aac87cbfc229 43 wait_us(i2c_bit_wait_us);
takuo 0:aac87cbfc229 44 _i2c.start();
takuo 0:aac87cbfc229 45 for (int i = 0; i < length; i++) {
takuo 0:aac87cbfc229 46 wait_us(i2c_bit_wait_us);
takuo 0:aac87cbfc229 47 if (_i2c.write(data[i]) != 1) {
takuo 0:aac87cbfc229 48 wait_us(i2c_bit_wait_us);
takuo 0:aac87cbfc229 49 _i2c.stop();
takuo 4:33a8ca14e0e0 50 return I2C_FAILURE;
takuo 0:aac87cbfc229 51 }
takuo 0:aac87cbfc229 52 }
takuo 0:aac87cbfc229 53 if (!repeated) {
takuo 0:aac87cbfc229 54 wait_us(i2c_bit_wait_us);
takuo 0:aac87cbfc229 55 _i2c.stop();
takuo 0:aac87cbfc229 56 }
takuo 4:33a8ca14e0e0 57 return I2C_SUCCESS;
takuo 0:aac87cbfc229 58 }
takuo 0:aac87cbfc229 59
takuo 4:33a8ca14e0e0 60 void ACM1602NI::character(int column, int row, int c)
takuo 4:33a8ca14e0e0 61 {
takuo 4:33a8ca14e0e0 62 writeCommand(address(column, row));
takuo 0:aac87cbfc229 63 writeData(c);
takuo 0:aac87cbfc229 64 }
takuo 0:aac87cbfc229 65
takuo 4:33a8ca14e0e0 66 void ACM1602NI::cls()
takuo 4:33a8ca14e0e0 67 {
takuo 0:aac87cbfc229 68 writeCommand(0x01);
takuo 0:aac87cbfc229 69 wait_ms(i2c_command_wait_ms);
takuo 0:aac87cbfc229 70 locate(0, 0);
takuo 0:aac87cbfc229 71 }
takuo 0:aac87cbfc229 72
takuo 4:33a8ca14e0e0 73 void ACM1602NI::locate(int column, int row)
takuo 4:33a8ca14e0e0 74 {
takuo 0:aac87cbfc229 75 _column = column;
takuo 0:aac87cbfc229 76 _row = row;
takuo 0:aac87cbfc229 77 }
takuo 0:aac87cbfc229 78
takuo 4:33a8ca14e0e0 79 int ACM1602NI::_putc(int value)
takuo 4:33a8ca14e0e0 80 {
takuo 0:aac87cbfc229 81 if (value == '\n') {
takuo 0:aac87cbfc229 82 _column = 0;
takuo 0:aac87cbfc229 83 _row = (_row + 1) % rows();
takuo 4:33a8ca14e0e0 84 } else {
takuo 0:aac87cbfc229 85 character(_column, _row, value);
takuo 0:aac87cbfc229 86 _column++;
takuo 0:aac87cbfc229 87 if (_column >= columns()) {
takuo 0:aac87cbfc229 88 _column = 0;
takuo 0:aac87cbfc229 89 _row = (_row + 1) % rows();
takuo 0:aac87cbfc229 90 }
takuo 0:aac87cbfc229 91 }
takuo 0:aac87cbfc229 92 return value;
takuo 0:aac87cbfc229 93 }
takuo 0:aac87cbfc229 94
takuo 4:33a8ca14e0e0 95 int ACM1602NI::_getc()
takuo 4:33a8ca14e0e0 96 {
takuo 0:aac87cbfc229 97 return -1;
takuo 0:aac87cbfc229 98 }
takuo 0:aac87cbfc229 99
takuo 4:33a8ca14e0e0 100 void ACM1602NI::writeCommand(int command)
takuo 4:33a8ca14e0e0 101 {
takuo 0:aac87cbfc229 102 char bs[3] = { i2c_addr, 0x00, command };
takuo 0:aac87cbfc229 103 writeBytes(bs, 3);
takuo 0:aac87cbfc229 104 }
takuo 0:aac87cbfc229 105
takuo 4:33a8ca14e0e0 106 void ACM1602NI::writeData(int data)
takuo 4:33a8ca14e0e0 107 {
takuo 0:aac87cbfc229 108 char bs[3] = { i2c_addr, 0x80, data };
takuo 0:aac87cbfc229 109 writeBytes(bs, 3);
takuo 0:aac87cbfc229 110 }
takuo 0:aac87cbfc229 111
takuo 4:33a8ca14e0e0 112 int ACM1602NI::address(int column, int row)
takuo 4:33a8ca14e0e0 113 {
takuo 0:aac87cbfc229 114 return 0x80 + row * 0x40 + column;
takuo 0:aac87cbfc229 115 }
takuo 0:aac87cbfc229 116
takuo 4:33a8ca14e0e0 117 int ACM1602NI::columns()
takuo 4:33a8ca14e0e0 118 {
takuo 0:aac87cbfc229 119 return display_columns;
takuo 0:aac87cbfc229 120 }
takuo 0:aac87cbfc229 121
takuo 4:33a8ca14e0e0 122 int ACM1602NI::rows()
takuo 4:33a8ca14e0e0 123 {
takuo 0:aac87cbfc229 124 return display_rows;
takuo 0:aac87cbfc229 125 }