[Arduino STM32] 03：OLED 驱动

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slotg 发布时间：2016-11-20 16:18

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[Arduino STM32] 01：管脚编号 PIN_MAP

[Arduino STM32] 02：LCD5110 驱动

并不是每一个 Arduino AVR 的程序都可以直接使用在 Arduino STM32 板上的，点完了 LCD 之后接下来也要试一下 OLED 的驱动，找了一个使用 Adafruit 库在 Arduino AVR 板上可以运行的例程直接在 STM32 下编译，结果却产生了错误！这貌似是库的支持不兼容，问题目前还在确认中，不过在 Arduino 官网论坛看到了这一篇帖子：

http://forum.arduino.cc/index.php?topic=265904.2115

有人改写了 Adafruit_SSD1306 库，让这个库可以在 Arduino STM32 底下运行，程序中对于 SPI 接口方式的 OLED 管脚是这么声明的：

#define OLED_DC 22 // D/C 6
#define OLED_RST  21 // RST 5
#define OLED_MOSI 20 // SDA 4
#define OLED_CLK  19 // SCL 3
#define OLED_CS 14 // --- x Not Connected

对应于 Arduino STM32 板的管脚为：

22  ->  B6
21  ->  B5
20  ->  B4
19  ->  B3
14  ->  A14

主程序：

/*
Using Display: http://www.ebay.com/itm/301504841805
Compiled Arduino GUI 1.6.1 on 2015-04-01 by M. Ray Burnette
Sketch uses 27,912 bytes (25%) of program storage space. Maximum is 108,000 bytes.
Global variables use 5,616 bytes of dynamic memory.
THIS VERSION OF SSD1306 IS SOFTWARE SPI ONLY!!!
http://github.com/hwiguna/g33k/blob/master/ArduinoProjects/128x64_OLED/HariChord/HariChord.ino
*/
#include ".\Adafruit_GFX.h"
#include ".\Adafruit_SSD1306.h"
// software SPI works on Maple Mini ARM 32-bit
// use these settings for the OLED display...
// These pin #'s are for Maple Mini/UNO/Nano/Mini328
// __Signal__Maple_//__OLED 128x64___
#define OLED_DC 22 // D/C 6
#define OLED_RST 21 // RST 5
#define OLED_MOSI 20 // SDA 4
#define OLED_CLK 19 // SCL 3
#define OLED_CS 14 // --- x Not Connected
Adafruit_SSD1306 OLED(OLED_MOSI, OLED_CLK, OLED_DC, OLED_RST, OLED_CS);
int nFrames = 36;
void setup() {
pinMode(17, OUTPUT);
pinMode(18, OUTPUT);
digitalWrite(17, LOW);
digitalWrite(18, HIGH);
// by default, we'll generate the high voltage from the 3.3v line internally! (neat!)
OLED.begin(SSD1306_SWITCHCAPVCC);
// init done
// Show image buffer on the display hardware.
// Since the buffer is intialized with an Adafruit splashscreen
// internally, this will display the splashscreen.
// NOTE: You _must_ call display after making any drawing commands
// to make them visible on the display hardware!
OLED.display(); // Adafruit Splash
OLED.clearDisplay(); // Clear the buffer.
// Y = 15 is the Blank Line between yellow / blue
}
void loop() {
for (int frame=0; frame < nFrames; frame++)
{
HariChord(frame);
}
for (int frame=(nFrames-1); frame >= 0; frame--)
{
HariChord(frame);
}
}
void HariChord(int frame)
{
OLED.clearDisplay();
int n = 7;
int r = frame * 64 / nFrames;
float rot = frame * 2*PI / nFrames;
for (int i=0; i<(n-1); i++)
{
float a = rot + i * 2*PI / n;
int x1 = 64 + cos(a) * r;
int y1 = 32 + sin(a) * r;
for (int j=i+1; j<n; j++)
{
a = rot + j * 2*PI / n;
int x2 = 64 + cos(a) * r;
int y2 = 32 + sin(a) * r;
OLED.drawLine(x1,y1, x2,y2, WHITE);
}
}
OLED.display();
}