IUT Cachan
panneau
Dependencies: mbed
Diff: LEDMatrix.cpp
- Revision:
- 0:b8e5f03fdaaf
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDMatrix.cpp Tue May 15 11:58:50 2018 +0000
@@ -0,0 +1,244 @@
+/**
+ * LED Matrix library for http://www.seeedstudio.com/depot/ultrathin-16x32-red-led-matrix-panel-p-1582.html
+ * The LED Matrix panel has 32x16 pixels. Several panel can be combined together as a large screen.
+ *
+ * Coordinate & Connection (mbed -> panel 0 -> panel 1 -> ...)
+ * (0, 0) (0, 0)
+ * +--------+--------+--------+ +--------+--------+
+ * | 5 | 3 | 1 | | 1 | 0 |
+ * | | | | | | |<----- mbed
+ * +--------+--------+--------+ +--------+--------+
+ * | 4 | 2 | 0 | (64, 16)
+ * | | | |<----- mbed
+ * +--------+--------+--------+
+ * (96, 32)
+ * Copyright (c) 2013 Seeed Technology Inc.
+ * @auther Yihui Xiong
+ * @date Nov 8, 2013
+ * @license Apache
+ */
+
+#include "LEDMatrix.h"
+#include "mbed.h"
+
+#if 0
+#define ASSERT(e) if (!(e)) { Serial.println(#e); while (1); }
+#else
+#define ASSERT(e)
+#endif
+
+LEDMatrix::LEDMatrix(PinName pinA, PinName pinB, PinName pinC, PinName pinD, PinName pinOE,
+ PinName pinR1, PinName pinR2, PinName pinB1, PinName pinB2, PinName pinG1, PinName pinG2,
+ PinName pinG3,PinName pinR3, PinName pinB3, PinName pinR4, PinName pinG4,PinName pinB4,
+ PinName pinSTB, PinName pinCLK) :
+ a(pinA), b(pinB), c(pinC), d(pinD), oe(pinOE), r1(pinR1), r2(pinR2), b1(pinB1), b2(pinB2), g1(pinG1), g2(pinG2), g3(pinG3), r3(pinR3), b3(pinB3),r4(pinR4), g4(pinG4), b4(pinB4), stb(pinSTB), clk(pinCLK)
+{
+ oe = 1;
+ clk = 1;
+ stb = 1;
+ mask = 0xff;
+ state = 0;
+ bufferIndex = 0;
+ flagSwap = 0;
+}
+
+void LEDMatrix::begin(uint8_t *displaybuf, uint16_t width, uint16_t height)
+{
+ this->displaybuf = displaybuf;
+ memoBuf = displaybuf;
+ drawBuf = memoBuf + width * height;
+ this->width = width;
+ this->height = height;
+
+ state = 1;
+}
+
+void LEDMatrix::drawPoint(uint16_t x, uint16_t y, uint8_t pixel)
+{
+ if (x>=width) return;
+ if (y>=height) return;
+ drawBuf[x+ width * y] = pixel & 0x07;
+}
+
+void LEDMatrix::drawRect(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t pixel)
+{
+ for (uint16_t x = x1; x < x2; x++) {
+ for (uint16_t y = y1; y < y2; y++) {
+ drawPoint(x, y, pixel);
+ }
+ }
+}
+
+int LEDMatrix::drawChar(uint16_t x, uint16_t y, char c, uint8_t pixel, Font *font)
+{
+ int i, j,k, col, max = 0;
+ for (i=0; i<font->hauteur(); i++) {
+ for (k=0; k<font->largeur(); k++) {
+ col = font->octet(c, i, k);
+ for (j=8; j>=0; j--) {
+ if (col & 0x01 != 0) {
+ int dx = j+8*k;
+ if (dx > max) max = dx;
+ drawPoint(x + dx, y+i, pixel);
+ }
+ col = col >> 1;
+ }
+ }
+ }
+ if (c==' ') {
+ return 5*font->largeur();
+ } else {
+ return max + font->largeur();
+ }
+}
+
+
+void LEDMatrix::drawCharString (uint16_t x, uint16_t y, char *c, uint8_t pixel,Font *font)
+{
+ int i=0;
+ while(c[i] != '\0') {
+ int dx = drawChar(x,y,c[i],pixel,font);
+ i++;
+ x += dx;
+ }
+}
+
+
+void LEDMatrix::drawImage(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint8_t *image)
+{
+ ASSERT(0 == ((x2 - x1) % 8));
+
+ for (uint16_t x = x1; x < x2; x++) {
+ for (uint16_t y = y1; y < y2; y++) {
+ uint8_t *byte = image + x * 8 + y / 8;
+ uint8_t bit = 7 - (y % 8);
+ uint8_t pixel = (*byte >> bit) & 1;
+
+ drawPoint(x, y, pixel);
+ }
+ }
+}
+
+void LEDMatrix::clear()
+{
+ uint8_t *ptr = drawBuf;
+ for (uint16_t i = 0; i < (width * height); i++) {
+ *ptr = 0x00;
+ ptr++;
+ }
+}
+
+void LEDMatrix::reverse()
+{
+ mask = ~mask;
+}
+
+uint8_t LEDMatrix::isReversed()
+{
+ return mask;
+}
+
+void LEDMatrix::scan()
+{
+ static uint8_t row = 0;
+
+ if (!state) {
+ return;
+ }
+
+ int debut1 = 2048 + row * width ; //1024
+ int debut2 = 6144 + row * width ; //3072
+ int debut3 = 2112 + row * width ;
+ int debut4 = 6208 + row * width ;
+
+ for (uint8_t i = 0; i <64 ; i++) {
+ clk = 0;
+ r1 = displaybuf[debut1+i] & 0x01;
+ r2 = displaybuf[debut2+i] & 0x01;
+ r3 = displaybuf[debut3+i] & 0x01;
+ r4 = displaybuf[debut4+i] & 0x01;
+ g1 = (displaybuf[debut1+i] & 0x02) >> 1;
+ g2 = (displaybuf[debut2+i] & 0x02) >> 1;
+ g3 = (displaybuf[debut3+i] & 0x02) >> 1;
+ g4 = (displaybuf[debut4+i] & 0x02) >> 1;
+ b1 = (displaybuf[debut1+i] & 0x04) >> 2;
+ b2 = (displaybuf[debut2+i] & 0x04) >> 2;
+ b3 = (displaybuf[debut3+i] & 0x04) >> 2;
+ b4 = (displaybuf[debut4+i] & 0x04) >> 2;
+ clk = 1;
+ }
+
+ debut1 = 0 + row * width;//0
+ debut2 = 4096 + row * width;//2048
+ debut3 = 64 + row * width;
+ debut4 = 4160 + row * width;
+
+ for (uint8_t i = 0; i <64 ; i++) {
+ clk = 0;
+ r1 = displaybuf[debut1+i] & 0x01;
+ r2 = displaybuf[debut2+i] & 0x01;
+ r3 = displaybuf[debut3+i] & 0x01;
+ r4 = displaybuf[debut4+i] & 0x01;
+ g1 = (displaybuf[debut1+i] & 0x02) >> 1;
+ g2 = (displaybuf[debut2+i] & 0x02) >> 1;
+ g3 = (displaybuf[debut3+i] & 0x02) >> 1;
+ g4 = (displaybuf[debut4+i] & 0x02) >> 1;
+ b1 = (displaybuf[debut1+i] & 0x04) >> 2;
+ b2 = (displaybuf[debut2+i] & 0x04) >> 2;
+ b3 = (displaybuf[debut3+i] & 0x04) >> 2;
+ b4 = (displaybuf[debut4+i] & 0x04) >> 2;
+ clk = 1;
+ }
+
+ oe = 1; // disable display
+
+ // select row
+ a = (row & 0x01);
+ b = (row & 0x02);
+ c = (row & 0x04);
+ d = (row & 0x08);
+
+ // latch data
+ stb = 0;
+ stb = 1;
+
+ oe = 0; // enable display
+
+ row=(row + 1) & 0x0F;
+
+ if (row==0) {
+ if (flagSwap == 1) {
+ if (bufferIndex==0) {
+ bufferIndex = 1;
+ displaybuf = memoBuf + width*height;
+ drawBuf = memoBuf;
+ } else {
+ bufferIndex = 0;
+ displaybuf = memoBuf;
+ drawBuf = memoBuf + width*height;
+ }
+ flagSwap = 0;
+ }
+ }
+}
+
+void LEDMatrix::on()
+{
+ state = 1;
+}
+
+void LEDMatrix::off()
+{
+ state = 0;
+ oe = 1;
+}
+
+void LEDMatrix::swap()
+{
+ flagSwap = 1;
+}
+
+int LEDMatrix::synchro()
+{
+ return !flagSwap;
+}