ST7565P_Example/main.cpp at main · rbultman/ST7565P_Example · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/* mbed Microcontroller Library
 * Copyright (c) 2019 ARM Limited
 * SPDX-License-Identifier: Apache-2.0
 */

#include <stdint.h>
#include "mbed.h"

// Blinking rate in milliseconds
#define BLINKING_RATE     1000ms

DigitalOut redLed(LED1);
DigitalOut greenLed(LED2);
DigitalOut blueLed(LED3);
DigitalOut redLed2(LED4);
DigitalOut backlight(D8);
DigitalOut reset(D7);
DigitalOut dataSelect(D6);

SPI spi(D11, NC, D13, D10);

void writeCommand(uint8_t cmd)
{
   dataSelect = 0;
   spi.write(cmd);
}

void writeData(uint8_t data)
{
   dataSelect = 1;
   spi.write(data);
}

void displayOn()
{
   writeCommand(0xAF);
}

void displayOff()
{
   writeCommand(0xAE);
}

void displayInit()
{
   const uint8_t initCmds[] =
   {
      0xA0, // ADC select normal
      0xAE, // display off
      0xC0, // common output mode select normal
      0xA2, // LCD bias 1/9
      0x2F, // Internal power operating mode
      0x26, // select resistor ratio
      0x81, // Set V5 output voltage
      0x11, // Column addres set upper bit
      0xAF, // Display on
   };
   uint8_t i;
   ThisThread::sleep_for(100ms);
   for(i=0; i<sizeof(initCmds)/sizeof(uint8_t); i++)
   {
      writeCommand(initCmds[i]);
   }
}

enum {
   AllPointsOn = 0xA5,
   AllPointsOff = 0xA4,
};

void setAll()
{
   uint8_t page;
   uint8_t col;

   for(page=0; page<8; page++)
   {
      writeCommand(0xB0 + page);
      writeCommand(0x10);
      writeCommand(0x00);
      for(col=0; col<128; col++)
      {
         writeData(0xff);
      }
   }
}

void showOutline()
{
   uint8_t page;
   uint8_t col;

   writeCommand(0xB0);
   writeCommand(0x10);
   writeCommand(0x00);
   for(col=0; col<128; col++)
   {
      writeData(0x01);
   }

   writeCommand(0xB7);
   writeCommand(0x10);
   writeCommand(0x00);
   for(col=0; col<128; col++)
   {
      writeData(0x80);
   }

   for(page=0; page<8; page++)
   {
      writeCommand(0xB0 + page);
      writeCommand(0x10);
      writeCommand(0x00);
      writeData(0xff);
   }

   for(page=0; page<8; page++)
   {
      writeCommand(0xB0 + page);
      writeCommand(0x17);
      writeCommand(0x0F);
      writeData(0xff);
   }
}

void clearDisplay()
{
   uint8_t page;
   uint8_t col;

   for(page=0; page<8; page++)
   {
      writeCommand(0xB0 + page);
      writeCommand(0x10);
      writeCommand(0x00);
      for(col=0; col<128; col++)
      {
         writeData(0);
      }
   }
}

int main()
{
   backlight = 0;
   reset = 0;
   ThisThread::sleep_for(50ms);
   reset = 1;
   ThisThread::sleep_for(50ms);
   displayInit();

   while (true)
   {
      greenLed = 1;
      setAll();
      ThisThread::sleep_for(BLINKING_RATE);

      greenLed = 0;
      clearDisplay();
      ThisThread::sleep_for(BLINKING_RATE);

      greenLed = 1;
      showOutline();
      ThisThread::sleep_for(BLINKING_RATE);

      greenLed = 0;
      clearDisplay();
      ThisThread::sleep_for(BLINKING_RATE);
   }
}