1 /*
2 * Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
3 * Copyright (c) 2014 Intel Corporation.
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be
14 * included in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25 #include <stdexcept>
26 #include <string>
27 #include <unistd.h>
28
29 #include "hd44780_bits.h"
30 #include "ssd1308.h"
31
32 using namespace upm;
33
SSD1308(int bus_in,int addr_in)34 SSD1308::SSD1308(int bus_in, int addr_in) : m_i2c_lcd_control(bus_in)
35 {
36 m_lcd_control_address = addr_in;
37 m_name = "SSD1308";
38
39 mraa::Result error = m_i2c_lcd_control.address(m_lcd_control_address);
40 if (error != mraa::SUCCESS) {
41 throw std::invalid_argument(std::string(__FUNCTION__) +
42 ": I2c.address() failed");
43 return;
44 }
45
46 m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_OFF); // display off
47 usleep(4500);
48 m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_ON); // display on
49 usleep(4500);
50 setNormalDisplay(); // set to normal display '1' is ON
51
52 clear();
53 setAddressingMode(PAGE);
54 }
55
~SSD1308()56 SSD1308::~SSD1308()
57 {
58 }
59
60 mraa::Result
draw(uint8_t * data,int bytes)61 SSD1308::draw(uint8_t* data, int bytes)
62 {
63 mraa::Result error = mraa::SUCCESS;
64
65 setAddressingMode(HORIZONTAL);
66 for (int idx = 0; idx < bytes; idx++) {
67 m_i2c_lcd_control.writeReg(LCD_DATA, data[idx]);
68 }
69
70 return error;
71 }
72
73 /*
74 * **************
75 * virtual area
76 * **************
77 */
78 mraa::Result
write(std::string msg)79 SSD1308::write(std::string msg)
80 {
81 mraa::Result error = mraa::SUCCESS;
82 uint8_t data[2] = { 0x40, 0 };
83
84 setAddressingMode(PAGE);
85 for (std::string::size_type i = 0; i < msg.size(); ++i) {
86 writeChar(msg[i]);
87 }
88
89 return error;
90 }
91
92 mraa::Result
setCursor(int row,int column)93 SSD1308::setCursor(int row, int column)
94 {
95 mraa::Result error = mraa::SUCCESS;
96
97 error = m_i2c_lcd_control.writeReg(LCD_CMD, BASE_PAGE_START_ADDR + row); // set page address
98 error = m_i2c_lcd_control.writeReg(LCD_CMD,
99 BASE_LOW_COLUMN_ADDR + (8 * column & 0x0F)); // set column
100 // lower address
101 error = m_i2c_lcd_control.writeReg(LCD_CMD,
102 BASE_HIGH_COLUMN_ADDR +
103 ((8 * column >> 4) & 0x0F)); // set column higher address
104
105 return error;
106 }
107
108 mraa::Result
clear()109 SSD1308::clear()
110 {
111 mraa::Result error = mraa::SUCCESS;
112 uint8_t columnIdx, rowIdx;
113
114 m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_OFF); // display off
115 for (rowIdx = 0; rowIdx < 8; rowIdx++) {
116 setCursor(rowIdx, 0);
117
118 // clear all columns
119 for (columnIdx = 0; columnIdx < 16; columnIdx++) {
120 writeChar(' ');
121 }
122 }
123 m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_ON); // display on
124 home();
125
126 return mraa::SUCCESS;
127 }
128
129 mraa::Result
home()130 SSD1308::home()
131 {
132 return setCursor(0, 0);
133 }
134
135 /*
136 * **************
137 * private area
138 * **************
139 */
140 mraa::Result
writeChar(uint8_t value)141 SSD1308::writeChar(uint8_t value)
142 {
143 mraa::Result rv;
144 if (value < 0x20 || value > 0x7F) {
145 value = 0x20; // space
146 }
147
148 for (uint8_t idx = 0; idx < 8; idx++) {
149 rv = m_i2c_lcd_control.writeReg(LCD_DATA, BasicFont[value - 32][idx]);
150 }
151
152 return rv;
153 }
154
155 mraa::Result
setNormalDisplay()156 SSD1308::setNormalDisplay()
157 {
158 return m_i2c_lcd_control.writeReg(LCD_CMD,
159 DISPLAY_CMD_SET_NORMAL_1308); // set to normal display '1' is
160 // ON
161 }
162
163 mraa::Result
setAddressingMode(displayAddressingMode mode)164 SSD1308::setAddressingMode(displayAddressingMode mode)
165 {
166 mraa::Result rv;
167 rv =m_i2c_lcd_control.writeReg(LCD_CMD, DISPLAY_CMD_MEM_ADDR_MODE); // set addressing mode
168 rv =m_i2c_lcd_control.writeReg(LCD_CMD, mode); // set page addressing mode
169 return rv;
170 }
171