Louis Mayencourt / Mbed OS NRFBOY

MBED NRF51 Arduboy port

arduboy.hpp@0:649b2fe69f16, 2017-01-05 (annotated)

Committer:
lmayencou
Date:
Thu Jan 05 18:37:50 2017 +0000
Revision:
0:649b2fe69f16
Child:
1:c53e766082b4
I2C screen

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lmayencou 0:649b2fe69f16 1 #include "Adafruit_SSD1306.h"
lmayencou 0:649b2fe69f16 2
lmayencou 0:649b2fe69f16 3 #define WIDTH 128
lmayencou 0:649b2fe69f16 4 #define HEIGHT 32
lmayencou 0:649b2fe69f16 5
lmayencou 0:649b2fe69f16 6 class Arduboy : public Adafruit_SSD1306_I2c
lmayencou 0:649b2fe69f16 7 {
lmayencou 0:649b2fe69f16 8 public:
lmayencou 0:649b2fe69f16 9 Arduboy(I2C i2c) :
lmayencou 0:649b2fe69f16 10 Adafruit_SSD1306_I2c(i2c)
lmayencou 0:649b2fe69f16 11 {
lmayencou 0:649b2fe69f16 12 // frame management
lmayencou 0:649b2fe69f16 13 setFrameRate(60);
lmayencou 0:649b2fe69f16 14 frameCount = 0;
lmayencou 0:649b2fe69f16 15 nextFrameStart = 0;
lmayencou 0:649b2fe69f16 16 post_render = false;
lmayencou 0:649b2fe69f16 17 }
lmayencou 0:649b2fe69f16 18
lmayencou 0:649b2fe69f16 19 void begin()
lmayencou 0:649b2fe69f16 20 {
lmayencou 0:649b2fe69f16 21 clearDisplay();
lmayencou 0:649b2fe69f16 22 writeChar('h');
lmayencou 0:649b2fe69f16 23 writeChar('e');
lmayencou 0:649b2fe69f16 24 writeChar('l');
lmayencou 0:649b2fe69f16 25 writeChar('l');
lmayencou 0:649b2fe69f16 26 writeChar('o');
lmayencou 0:649b2fe69f16 27 display();
lmayencou 0:649b2fe69f16 28 }
lmayencou 0:649b2fe69f16 29
lmayencou 0:649b2fe69f16 30 void idle()
lmayencou 0:649b2fe69f16 31 {}
lmayencou 0:649b2fe69f16 32
lmayencou 0:649b2fe69f16 33 /* Frame management */
lmayencou 0:649b2fe69f16 34
lmayencou 0:649b2fe69f16 35 void setFrameRate(uint8_t rate)
lmayencou 0:649b2fe69f16 36 {
lmayencou 0:649b2fe69f16 37 frameRate = rate;
lmayencou 0:649b2fe69f16 38 eachFrameMillis = 1000/rate;
lmayencou 0:649b2fe69f16 39 }
lmayencou 0:649b2fe69f16 40
lmayencou 0:649b2fe69f16 41 bool everyXFrames(uint8_t frames)
lmayencou 0:649b2fe69f16 42 {
lmayencou 0:649b2fe69f16 43 return frameCount % frames == 0;
lmayencou 0:649b2fe69f16 44 }
lmayencou 0:649b2fe69f16 45
lmayencou 0:649b2fe69f16 46 bool newFrame()
lmayencou 0:649b2fe69f16 47 {
lmayencou 0:649b2fe69f16 48 long now = time(NULL);
lmayencou 0:649b2fe69f16 49 uint8_t remaining;
lmayencou 0:649b2fe69f16 50
lmayencou 0:649b2fe69f16 51 // post render
lmayencou 0:649b2fe69f16 52 if (post_render)
lmayencou 0:649b2fe69f16 53 {
lmayencou 0:649b2fe69f16 54 lastFrameDurationMs = now - lastFrameStart;
lmayencou 0:649b2fe69f16 55 frameCount++;
lmayencou 0:649b2fe69f16 56 post_render = false;
lmayencou 0:649b2fe69f16 57 }
lmayencou 0:649b2fe69f16 58
lmayencou 0:649b2fe69f16 59 // if it's not time for the next frame yet
lmayencou 0:649b2fe69f16 60 if (now < nextFrameStart)
lmayencou 0:649b2fe69f16 61 {
lmayencou 0:649b2fe69f16 62 remaining = nextFrameStart - now;
lmayencou 0:649b2fe69f16 63 // if we have more than 1ms to spare, lets sleep
lmayencou 0:649b2fe69f16 64 // we should be woken up by timer0 every 1ms, so this should be ok
lmayencou 0:649b2fe69f16 65 if (remaining > 1)
lmayencou 0:649b2fe69f16 66 idle();
lmayencou 0:649b2fe69f16 67 return false;
lmayencou 0:649b2fe69f16 68 }
lmayencou 0:649b2fe69f16 69
lmayencou 0:649b2fe69f16 70 // pre-render
lmayencou 0:649b2fe69f16 71
lmayencou 0:649b2fe69f16 72 // next frame should start from last frame start + frame duration
lmayencou 0:649b2fe69f16 73 nextFrameStart = lastFrameStart + eachFrameMillis;
lmayencou 0:649b2fe69f16 74 // If we're running CPU at 100%+ (too slow to complete each loop within
lmayencou 0:649b2fe69f16 75 // the frame duration) then it's possible that we get "behind"... Say we
lmayencou 0:649b2fe69f16 76 // took 5ms too long, resulting in nextFrameStart being 5ms in the PAST.
lmayencou 0:649b2fe69f16 77 // In that case we simply schedule the next frame to start immediately.
lmayencou 0:649b2fe69f16 78 //
lmayencou 0:649b2fe69f16 79 // If we were to let the nextFrameStart slide further and further into
lmayencou 0:649b2fe69f16 80 // the past AND eventually the CPU usage dropped then frame management
lmayencou 0:649b2fe69f16 81 // would try to "catch up" (by speeding up the game) to make up for all
lmayencou 0:649b2fe69f16 82 // that lost time. That would not be good. We allow frames to take too
lmayencou 0:649b2fe69f16 83 // long (what choice do we have?), but we do not allow super-fast frames
lmayencou 0:649b2fe69f16 84 // to make up for slow frames in the past.
lmayencou 0:649b2fe69f16 85 if (nextFrameStart < now)
lmayencou 0:649b2fe69f16 86 nextFrameStart = now;
lmayencou 0:649b2fe69f16 87
lmayencou 0:649b2fe69f16 88 lastFrameStart = now;
lmayencou 0:649b2fe69f16 89
lmayencou 0:649b2fe69f16 90 post_render = true;
lmayencou 0:649b2fe69f16 91 return post_render;
lmayencou 0:649b2fe69f16 92 }
lmayencou 0:649b2fe69f16 93
lmayencou 0:649b2fe69f16 94 // This function is deprecated.
lmayencou 0:649b2fe69f16 95 // It should remain as is for backwards compatibility.
lmayencou 0:649b2fe69f16 96 // New code should use newFrame().
lmayencou 0:649b2fe69f16 97 bool nextFrame()
lmayencou 0:649b2fe69f16 98 {
lmayencou 0:649b2fe69f16 99 long now = time(NULL);
lmayencou 0:649b2fe69f16 100 uint8_t remaining;
lmayencou 0:649b2fe69f16 101
lmayencou 0:649b2fe69f16 102 if (post_render) {
lmayencou 0:649b2fe69f16 103 lastFrameDurationMs = now - lastFrameStart;
lmayencou 0:649b2fe69f16 104 frameCount++;
lmayencou 0:649b2fe69f16 105 post_render = false;
lmayencou 0:649b2fe69f16 106 }
lmayencou 0:649b2fe69f16 107
lmayencou 0:649b2fe69f16 108 if (now < nextFrameStart) {
lmayencou 0:649b2fe69f16 109 remaining = nextFrameStart - now;
lmayencou 0:649b2fe69f16 110 if (remaining > 1)
lmayencou 0:649b2fe69f16 111 idle();
lmayencou 0:649b2fe69f16 112 return false;
lmayencou 0:649b2fe69f16 113 }
lmayencou 0:649b2fe69f16 114
lmayencou 0:649b2fe69f16 115 nextFrameStart = now + eachFrameMillis;
lmayencou 0:649b2fe69f16 116 lastFrameStart = now;
lmayencou 0:649b2fe69f16 117 post_render = true;
lmayencou 0:649b2fe69f16 118 return post_render;
lmayencou 0:649b2fe69f16 119 }
lmayencou 0:649b2fe69f16 120
lmayencou 0:649b2fe69f16 121 void clear()
lmayencou 0:649b2fe69f16 122 {
lmayencou 0:649b2fe69f16 123 clearDisplay();
lmayencou 0:649b2fe69f16 124 }
lmayencou 0:649b2fe69f16 125
lmayencou 0:649b2fe69f16 126 void setCursor(int16_t x, int16_t y)
lmayencou 0:649b2fe69f16 127 {
lmayencou 0:649b2fe69f16 128 setTextCursor(x,y);
lmayencou 0:649b2fe69f16 129 }
lmayencou 0:649b2fe69f16 130
lmayencou 0:649b2fe69f16 131 uint8_t frameRate;
lmayencou 0:649b2fe69f16 132 uint16_t frameCount;
lmayencou 0:649b2fe69f16 133 uint8_t eachFrameMillis;
lmayencou 0:649b2fe69f16 134 long lastFrameStart;
lmayencou 0:649b2fe69f16 135 long nextFrameStart;
lmayencou 0:649b2fe69f16 136 bool post_render;
lmayencou 0:649b2fe69f16 137 uint8_t lastFrameDurationMs;
lmayencou 0:649b2fe69f16 138
lmayencou 0:649b2fe69f16 139 protected:
lmayencou 0:649b2fe69f16 140 unsigned char sBuffer[(HEIGHT*WIDTH)/8];
lmayencou 0:649b2fe69f16 141 };