Initial commit
This commit is contained in:
410
FrameBuffer.cpp
Normal file
410
FrameBuffer.cpp
Normal file
@@ -0,0 +1,410 @@
|
||||
/*
|
||||
* Copyright (c) 2018, Lionel Adrien Sambuc
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
*
|
||||
* 3. Neither the name of the copyright holder nor the names of its
|
||||
* contributors may be used to endorse or promote products derived from
|
||||
* this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#include <Arduino.h>
|
||||
#include <MsTimer2.h>
|
||||
|
||||
#include "FrameBuffer.h"
|
||||
|
||||
/* All the code assumes dimensions are below 127, as signed chars are used to
|
||||
* store positions and indices. */
|
||||
#define MAX_X 4
|
||||
#define MAX_Y 4
|
||||
#define MAX_Z 4
|
||||
|
||||
#define BRIGHTNESS_LEVELS 16
|
||||
#define BRIGHTNESS_MAX 256
|
||||
|
||||
// Positions (x,y) to pin, same for all layers.
|
||||
static char position2pin[MAX_X][MAX_Y] = {
|
||||
{13, 12, 11, 10},
|
||||
{ 9, 8, 7, 6},
|
||||
{ 5, 4, 3, 2},
|
||||
{ 1, 0, A5, A4}
|
||||
};
|
||||
|
||||
// z-coordinate position to pin.
|
||||
static char layer[MAX_Z] = { A0, A1, A2, A3 };
|
||||
|
||||
static unsigned char font[][4][4] = {
|
||||
// a
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,1},
|
||||
},
|
||||
// b
|
||||
{
|
||||
{1,0,0,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// c
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,1,1,0},
|
||||
{1,0,0,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// d
|
||||
{
|
||||
{0,0,1,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// e
|
||||
{
|
||||
{1,1,1,0},
|
||||
{1,1,1,0},
|
||||
{1,0,0,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// f
|
||||
{
|
||||
{1,1,1,0},
|
||||
{1,0,0,0},
|
||||
{1,1,0,0},
|
||||
{1,0,0,0},
|
||||
},
|
||||
// g
|
||||
{
|
||||
{1,1,1,1},
|
||||
{1,0,0,0},
|
||||
{1,0,1,1},
|
||||
{1,1,1,1},
|
||||
},
|
||||
// h
|
||||
{
|
||||
{1,0,0,0},
|
||||
{1,0,0,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
},
|
||||
// i
|
||||
{
|
||||
{0,1,0,0},
|
||||
{0,0,0,0},
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
},
|
||||
// j
|
||||
{
|
||||
{0,0,1,0},
|
||||
{0,0,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// k
|
||||
{
|
||||
{1,0,0,0},
|
||||
{1,0,1,0},
|
||||
{1,1,0,0},
|
||||
{1,0,1,0},
|
||||
},
|
||||
// l
|
||||
{
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
{0,1,1,0},
|
||||
},
|
||||
// M
|
||||
{
|
||||
{1,0,0,1},
|
||||
{1,1,1,1},
|
||||
{1,0,0,1},
|
||||
{1,0,0,1},
|
||||
},
|
||||
// n
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,0,1,1},
|
||||
{0,1,0,1},
|
||||
{0,1,0,1},
|
||||
},
|
||||
// o
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// p
|
||||
{
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
{1,0,0,0},
|
||||
},
|
||||
// q
|
||||
{
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
{0,0,1,0},
|
||||
},
|
||||
// r
|
||||
{
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
{1,0,0,1},
|
||||
},
|
||||
// s
|
||||
{
|
||||
{1,1,1,0},
|
||||
{0,1,0,0},
|
||||
{0,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// T
|
||||
{
|
||||
{1,1,1,0},
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
},
|
||||
// u
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,0,1,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
},
|
||||
// v
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,0,1,0},
|
||||
{1,0,1,0},
|
||||
{0,1,0,0},
|
||||
},
|
||||
// Ww
|
||||
{
|
||||
{1,0,0,1},
|
||||
{1,0,0,1},
|
||||
{1,1,1,1},
|
||||
{1,0,0,1},
|
||||
},
|
||||
// x
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,0,1,0},
|
||||
{1,1,1,0},
|
||||
{1,0,1,0},
|
||||
},
|
||||
// y
|
||||
{
|
||||
{0,0,0,0},
|
||||
{1,0,1,0},
|
||||
{0,1,0,0},
|
||||
{0,1,0,0},
|
||||
},
|
||||
// z
|
||||
{
|
||||
{1,1,1,1},
|
||||
{0,0,1,0},
|
||||
{0,1,0,0},
|
||||
{1,1,1,1},
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
#define FRAMEBUFFER_POINTERS 1 /* Either 1 (Enabled) or 0 (disabled) */
|
||||
#if FRAMEBUFFER_POINTERS
|
||||
struct Frame frames[2];
|
||||
|
||||
struct FrameBuffer {
|
||||
unsigned char intensity = 0;
|
||||
Frame *front = &frames[0];
|
||||
Frame *back = &frames[1];
|
||||
} FrameBuffer;
|
||||
#else
|
||||
struct FrameBuffer {
|
||||
unsigned char visible = 0;
|
||||
unsigned char intensity = 0;
|
||||
Frame frames[2];
|
||||
} FrameBuffer;
|
||||
#endif
|
||||
|
||||
extern char position2pin[MAX_X][MAX_Y];
|
||||
extern char layer[MAX_Z];
|
||||
|
||||
void FrameBufferSwitch(void) {
|
||||
#if FRAMEBUFFER_POINTERS
|
||||
Frame * t = FrameBuffer.back;
|
||||
FrameBuffer.back = FrameBuffer.front;
|
||||
FrameBuffer.front = t;
|
||||
#else
|
||||
FrameBuffer.visible = (FrameBuffer.visible + 1) & 0x1;
|
||||
#endif
|
||||
}
|
||||
|
||||
Frame *FrameBufferGetFront(void) {
|
||||
#if FRAMEBUFFER_POINTERS
|
||||
return FrameBuffer.front;
|
||||
#else
|
||||
return &FrameBuffer.frames[FrameBuffer.visible];
|
||||
#endif
|
||||
}
|
||||
|
||||
Frame *FrameBufferGetBack(void) {
|
||||
#if FRAMEBUFFER_POINTERS
|
||||
return FrameBuffer.back;
|
||||
#else
|
||||
return &FrameBuffer.frames[(FrameBuffer.visible + 1) & 0x1];
|
||||
#endif
|
||||
}
|
||||
|
||||
void FrameBufferWrite(char x, char y, char z, unsigned char val) {
|
||||
FrameBufferGetBack()->data[x][y][z] = val;
|
||||
}
|
||||
|
||||
static void letter(char l, char brightness) {
|
||||
memset(FrameBufferGetBack(), 0, FRAME_SIZE());
|
||||
for (char x = 0; x < MAX_X; x++) {
|
||||
for (char y = 0; y < MAX_Y; y++) {
|
||||
FrameBufferGetBack()->data[3][y][3-x] =
|
||||
font[l - 'a'][x][y] * brightness;
|
||||
}
|
||||
}
|
||||
FrameBufferSwitch();
|
||||
delay(200);
|
||||
}
|
||||
|
||||
void printAllSymbols() {
|
||||
for(char c = 0; c < sizeof(font)/sizeof(font[0]); c++) {
|
||||
letter(c+'a', 127);
|
||||
delay(500);
|
||||
}
|
||||
}
|
||||
|
||||
void FrameBufferWriteStr(char * str, const short delayPerLetter,
|
||||
const unsigned char brightness) {
|
||||
unsigned char *c = str;
|
||||
while(*c != 0) {
|
||||
if (*c == ' ') {
|
||||
memset(FrameBufferGetBack(), 0, FRAME_SIZE());
|
||||
FrameBufferSwitch();
|
||||
} else {
|
||||
letter(*c, brightness);
|
||||
}
|
||||
|
||||
delay(delayPerLetter);
|
||||
|
||||
// Make sure there is a white space between font
|
||||
memset(FrameBufferGetBack(), 0, FRAME_SIZE());
|
||||
FrameBufferSwitch();
|
||||
delay(delayPerLetter/4);
|
||||
|
||||
c++;
|
||||
}
|
||||
}
|
||||
|
||||
void FrameBufferRefresh(void) {
|
||||
Frame *f = FrameBufferGetFront();
|
||||
#if BRIGHTNESS_INCREMENT
|
||||
FrameBuffer.intensity =
|
||||
(FrameBuffer.intensity + BRIGHTNESS_INCREMENT) % BRIGHTNESS_MAX;
|
||||
#else
|
||||
FrameBuffer.intensity = 128;
|
||||
#endif
|
||||
|
||||
#if DEBUG_FB_REFRESH
|
||||
static int timeStartRefresh = micros();
|
||||
static int timeLastRefresh = 0;
|
||||
#endif
|
||||
|
||||
for (char z = 0; z < MAX_Z; z++) {
|
||||
// 1. Set up the layer leds to be turned on / off
|
||||
for (char x = 0; x < MAX_X; x++) {
|
||||
for (char y = 0; y < MAX_Y; y++) {
|
||||
if (f->data[x][y][z] > FrameBuffer.intensity) {
|
||||
digitalWrite(position2pin[x][y], HIGH);
|
||||
} else {
|
||||
digitalWrite(position2pin[x][y], LOW);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// 2. Turn the power on on the layer
|
||||
digitalWrite(layer[z], LOW);
|
||||
|
||||
// Let it display
|
||||
#if BRIGHTNESS_LEVELS
|
||||
delayMicroseconds(FRAME_PERIOD / (MAX_Z * BRIGHTNESS_LEVELS));
|
||||
#else
|
||||
delayMicroseconds(FRAME_PERIOD / MAX_Z);
|
||||
#endif
|
||||
|
||||
// 3. Turn the power off on the layer
|
||||
digitalWrite(layer[z], HIGH);
|
||||
}
|
||||
|
||||
#if DEBUG_FB_REFRESH
|
||||
Serial.print("Time Since last refresh: ");
|
||||
Serial.println((timeStartRefresh - timeLastRefresh), DEC);
|
||||
|
||||
timeLastRefresh = micros();
|
||||
|
||||
Serial.print("Period Refresh Time: ");
|
||||
Serial.println((timeLastRefresh - timeStartRefresh), DEC);
|
||||
#endif
|
||||
}
|
||||
|
||||
void FrameBufferInit(void) {
|
||||
// Setting rows to ouput
|
||||
for (char x = 0; x < MAX_X; x++) {
|
||||
for (char y = 0; y < MAX_Y; y++) {
|
||||
pinMode(position2pin[x][y], OUTPUT);
|
||||
digitalWrite(position2pin[x][y], LOW);
|
||||
}
|
||||
}
|
||||
|
||||
// Setting layers to output
|
||||
for (char z = 0; z < MAX_Z; z++) {
|
||||
pinMode(layer[z], OUTPUT);
|
||||
digitalWrite(layer[z], HIGH);
|
||||
}
|
||||
|
||||
// Initialize FrameBuffers
|
||||
memset(FrameBufferGetFront(), 0, FRAME_SIZE());
|
||||
memset(FrameBufferGetBack(), 0, FRAME_SIZE());
|
||||
|
||||
#if BRIGHTNESS_LEVELS
|
||||
MsTimer2::set(FRAME_PERIOD / (1000 * BRIGHTNESS_LEVELS),
|
||||
FrameBufferRefresh);
|
||||
#else
|
||||
MsTimer2::set(FRAME_PERIOD / (1000), FrameBufferRefresh);
|
||||
#endif
|
||||
MsTimer2::start();
|
||||
}
|
||||
Reference in New Issue
Block a user