Adafruit-RGB_matrix_Panel(32*32)
Dependencies: Adafruit-GFX
RGBmatrixPanel.cpp
- Committer:
- lelect
- Date:
- 2014-05-25
- Revision:
- 5:1f8409ee8850
- Parent:
- 4:0ff6053c4bb2
- Child:
- 6:b594794a132e
- Child:
- 9:349baf041171
File content as of revision 5:1f8409ee8850:
#define DEBUG #undef DEBUG #include "RGBmatrixPanel.h" #include "gamma.h" #define nPlanes 4 // The fact that the display driver interrupt stuff is tied to the // singular Timer1 doesn't really take well to object orientation with // multiple RGBmatrixPanel instances. The solution at present is to // allow instances, but only one is active at any given time, via its // begin() method. The implementation is still incomplete in parts; // the prior active panel really should be gracefully disabled, and a // stop() method should perhaps be added...assuming multiple instances // are even an actual need. //static RGBmatrixPanel *activePanel = NULL; // Code common to both the 16x32 and 32x32 constructors: void RGBmatrixPanel::init(uint8_t rows, bool dbuf) { nRows = rows; // Number of multiplexed rows; actual height is 2X this // Allocate and initialize matrix buffer: int buffsize = 32*nRows*3, // x3 = 3 bytes holds 4 planes "packed" allocsize = (dbuf == true) ? (buffsize * 2) : buffsize; if(NULL == (matrixbuff[0] = (uint8_t *)malloc(allocsize))) return; memset(matrixbuff[0], 0, allocsize); // If not double-buffered, both buffers then point to the same address: matrixbuff[1] = (dbuf == true) ? &matrixbuff[0][buffsize] : matrixbuff[0]; plane = nPlanes - 1; row = nRows - 1; swapflag = false; backindex = 0; // Array index of back buffer } // Constructor for 16x32 panel: RGBmatrixPanel::RGBmatrixPanel(PinName r1,PinName r2,PinName g1,PinName g2,PinName b1,PinName b2,PinName a,PinName b, PinName c, PinName sclk, PinName latch, PinName oe, bool dbuf) :Adafruit_GFX(32, 16), _dataBus(r1,g1,b1,r2,g2,b2), _rowBus(a,b,c), _d(NC), _sclk(sclk), _latch(latch), _oe(oe) { init(8, dbuf); } // Constructor for 32x32 panel: RGBmatrixPanel::RGBmatrixPanel(PinName r1,PinName r2,PinName g1,PinName g2,PinName b1,PinName b2,PinName a,PinName b,PinName c,PinName d,PinName sclk,PinName latch,PinName oe,bool dbuf) :Adafruit_GFX(32, 32), _dataBus(r1,g1,b1,r2,g2,b2), _rowBus(a,b,c), _d(d),// Init 32x32-specific elements: _sclk(sclk), _latch(latch), _oe(oe) { init(16,dbuf); } void RGBmatrixPanel::begin(void) { backindex = 0; // Back buffer buffptr = matrixbuff[1 - backindex]; // -> front buffer // activePanel = this; // For interrupt hander // Set up Timer for interrupt: #ifndef DEBUG _refresh.attach_us(this,(&RGBmatrixPanel::updateDisplay),100); //updateDisplay() called every 1ms #else _refresh.attach(this,(&RGBmatrixPanel::updateDisplay),0.5); //updateDisplay() called every 2s #endif } // Original RGBmatrixPanel library used 3/3/3 color. Later version used // 4/4/4. Then Adafruit_GFX (core library used across all Adafruit // display devices now) standardized on 5/6/5. The matrix still operates // internally on 4/4/4 color, but all the graphics functions are written // to expect 5/6/5...the matrix lib will truncate the color components as // needed when drawing. These next functions are mostly here for the // benefit of older code using one of the original color formats. // Promote 3/3/3 RGB to Adafruit_GFX 5/6/5 uint16_t RGBmatrixPanel::Color333(uint8_t r, uint8_t g, uint8_t b) { // RRRrrGGGgggBBBbb return ((r & 0x7) << 13) | ((r & 0x6) << 10) | ((g & 0x7) << 8) | ((g & 0x7) << 5) | ((b & 0x7) << 2) | ((b & 0x6) >> 1); } // Promote 4/4/4 RGB to Adafruit_GFX 5/6/5 uint16_t RGBmatrixPanel::Color444(uint8_t r, uint8_t g, uint8_t b) { // RRRRrGGGGggBBBBb return ((r & 0xF) << 12) | ((r & 0x8) << 8) | ((g & 0xF) << 7) | ((g & 0xC) << 3) | ((b & 0xF) << 1) | ((b & 0x8) >> 3); } // Demote 8/8/8 to Adafruit_GFX 5/6/5 // If no gamma flag passed, assume linear color uint16_t RGBmatrixPanel::Color888(uint8_t r, uint8_t g, uint8_t b) { return ((r & 0xF8) << 11) | ((g & 0xFC) << 5) | (b >> 3); } // 8/8/8 -> gamma -> 5/6/5 uint16_t RGBmatrixPanel::Color888(uint8_t r, uint8_t g, uint8_t b, bool gflag) { if(gflag) { // Gamma-corrected color? r = gamma[r]; // Gamma correction table maps g = gamma[g]; // 8-bit input to 4-bit output b = gamma[b]; return (r << 12) | ((r & 0x8) << 8) | // 4/4/4 -> 5/6/5 (g << 7) | ((g & 0xC) << 3) | (b << 1) | ( b >> 3); } // else linear (uncorrected) color return ((r & 0xF8) << 11) | ((g & 0xFC) << 5) | (b >> 3); } uint16_t RGBmatrixPanel::ColorHSV(long hue, uint8_t sat, uint8_t val, bool gflag) { uint8_t r, g, b, lo; uint16_t s1, v1; // Hue hue %= 1536; // -1535 to +1535 if(hue < 0) hue += 1536; // 0 to +1535 lo = hue & 255; // Low byte = primary/secondary color mix switch(hue >> 8) { // High byte = sextant of colorwheel case 0 : r = 255 ; g = lo ; b = 0 ; break; // R to Y case 1 : r = 255 - lo; g = 255 ; b = 0 ; break; // Y to G case 2 : r = 0 ; g = 255 ; b = lo ; break; // G to C case 3 : r = 0 ; g = 255 - lo; b = 255 ; break; // C to B case 4 : r = lo ; g = 0 ; b = 255 ; break; // B to M default: r = 255 ; g = 0 ; b = 255 - lo; break; // M to R } // Saturation: add 1 so range is 1 to 256, allowig a quick shift operation // on the result rather than a costly divide, while the type upgrade to int // avoids repeated type conversions in both directions. s1 = sat + 1; r = 255 - (((255 - r) * s1) >> 8); g = 255 - (((255 - g) * s1) >> 8); b = 255 - (((255 - b) * s1) >> 8); // Value (brightness) & 16-bit color reduction: similar to above, add 1 // to allow shifts, and upgrade to int makes other conversions implicit. v1 = val + 1; if(gflag) { // Gamma-corrected color? r = gamma[(r * v1) >> 8]; // Gamma correction table maps g = gamma[(g * v1) >> 8]; // 8-bit input to 4-bit output b = gamma[(b * v1) >> 8]; //before pgm_read_byte(&gamma[(b * v1) >> 8]) } else { // linear (uncorrected) color r = (r * v1) >> 12; // 4-bit results g = (g * v1) >> 12; b = (b * v1) >> 12; } return (r << 12) | ((r & 0x8) << 8) | // 4/4/4 -> 5/6/5 (g << 7) | ((g & 0xC) << 3) | (b << 1) | ( b >> 3); } void RGBmatrixPanel::drawPixel(int16_t x, int16_t y, uint16_t c) { uint8_t r, g, b, bit, limit, *ptr; if((x < 0) || (x >= _width) || (y < 0) || (y >= _height)) return; switch(rotation) { case 1: swap(x, y); x = _rawWidth - 1 - x; break; case 2: x = _rawWidth - 1 - x; y = _rawHeight - 1 - y; break; case 3: swap(x, y); y = _rawHeight - 1 - y; break; } // Adafruit_GFX uses 16-bit color in 5/6/5 format, while matrix needs // 4/4/4. Pluck out relevant bits while separating into R,G,B: r = c >> 12; // RRRRrggggggbbbbb g = (c >> 7) & 0xF; // rrrrrGGGGggbbbbb b = (c >> 1) & 0xF; // rrrrrggggggBBBBb // Loop counter stuff //log_debug("(%X, %X, %X)@(%d,%d)%s",r,g,b,x,y,"\t"); bit = 2; limit = 1 << nPlanes; if(y < nRows) { // Data for the upper half of the display is stored in the lower bits of each byte. ptr = &matrixbuff[backindex][y*_rawWidth*(nPlanes-1) + x]; // Base addr // Plane 0 is a tricky case -- its data is spread about, stored in least two bits not used by the other planes. ptr[64] &= ~(_BV(1)|_BV(0)); // Plane 0 R,G mask(0b11111100) out in one op if(r & 1) ptr[64] |= _BV(0); // Plane 0 R: 64 bytes ahead, bit 0 if(g & 1) ptr[64] |= _BV(1); // Plane 0 G: 64 bytes ahead, bit 1 if(b & 1) ptr[32] |= _BV(0); // Plane 0 B: 32 bytes ahead, bit 0 else ptr[32] &= ~_BV(0); // Plane 0 B unset; mask out // The remaining three image planes are more normal-ish. // Data is stored in the high 6 bits so it can be quickly // copied to the DATAPORT register w/6 output lines. for(; bit < limit; bit <<= 1) { *ptr &= ~(_BV(4)|_BV(3)|_BV(2)) ; // Mask(0b11100011) out R,G,B in one op if(r & bit) *ptr |= _BV(2); // Plane N R: bit 2 if(g & bit) *ptr |= _BV(3); // Plane N G: bit 3 if(b & bit) *ptr |= _BV(4); // Plane N B: bit 4 ptr += _rawWidth; // Advance to next bit plane } } else { // Data for the lower half of the display is stored in the upper bits, except for the plane 0 stuff, using 2 least bits. ptr = &matrixbuff[backindex][(y-nRows)*_rawWidth*(nPlanes-1) + x]; *ptr &= ~(_BV(1)|_BV(0)); // Plane 0 G,B mask out in one op if(r & 1) ptr[32] |= _BV(1); // Plane 0 R: 32 bytes ahead, bit 1 else ptr[32] &= ~_BV(1); // Plane 0 R unset; mask out if(g & 1) *ptr |= _BV(0); // Plane 0 G: bit 0 if(b & 1) *ptr |= _BV(1); // Plane 0 B: bit 0 for(; bit < limit; bit <<= 1) { *ptr &= ~(_BV(7)|_BV(6)|_BV(5)); // Mask out R,G,B in one op if(r & bit) *ptr |= _BV(5); // Plane N R: bit 5 if(g & bit) *ptr |= _BV(6); // Plane N G: bit 6 if(b & bit) *ptr |= _BV(7); // Plane N B: bit 7 ptr += _rawWidth; // Advance to next bit plane } } } void RGBmatrixPanel::fillScreen(uint16_t c) { if((c == 0x0000) || (c == 0xffff)) { // For black or white, all bits in frame buffer will be identically // set or unset (regardless of weird bit packing), so it's OK to just // quickly memset the whole thing: memset(matrixbuff[backindex], c, 32 * nRows * 3); } else { // Otherwise, need to handle it the long way: Adafruit_GFX::fillScreen(c); } } // Return address of back buffer -- can then load/store data directly uint8_t *RGBmatrixPanel::backBuffer() { return matrixbuff[backindex]; } // For smooth animation -- drawing always takes place in the "back" buffer; // this method pushes it to the "front" for display. Passing "true", the // updated display contents are then copied to the new back buffer and can // be incrementally modified. If "false", the back buffer then contains // the old front buffer contents -- your code can either clear this or // draw over every pixel. (No effect if double-buffering is not enabled.) void RGBmatrixPanel::swapBuffers(bool copy) { log_debug("\r\ncall swapBuffers %s","\r\n"); if(matrixbuff[0] != matrixbuff[1]) { // To avoid 'tearing' display, actual swap takes place in the interrupt // handler, at the end of a complete screen refresh cycle. swapflag = true; // Set flag here, then... while(swapflag == true) wait_ms(1); // wait for interrupt to clear it if(copy == true) { log_debug("\tmemcpy %s","\r\n"); memcpy(matrixbuff[backindex], matrixbuff[1-backindex], 32 * nRows * 3); } else { log_debug("\tnot memcpy %s","\r\n"); } } } // Dump display contents to the Serial Monitor, adding some formatting to // simplify copy-and-paste of data as a PROGMEM-embedded image for another // sketch. If using multiple dumps this way, you'll need to edit the // output to change the 'img' name for each. Data can then be loaded // back into the display using a pgm_read_byte() loop. void RGBmatrixPanel::dumpMatrix(void) { #ifdef DEBUG log_debug("\r\ncall dumpMatrix%s","\r\n"); int buffsize=32*nRows*3; for(int item=0; item<buffsize; item++) { log_debug("0x%02X",matrixbuff[backindex][item]); if((item%32)==31) log_debug(",\r\n"); else log_debug(","); } log_debug("%s","\r\n\r\n"); #endif } void RGBmatrixPanel::updateDisplay(void) { uint8_t *ptr; log_debug("\r\ncall updateDisplay\r\n"); _oe=1; _latch=1; if(++plane >= nPlanes) { // Advance plane counter. Maxed out? plane = 0; // Yes, reset to plane 0, and if(++row >= nRows) { // advance row counter. Maxed out? row= 0; // Yes, reset row counter, then... if(swapflag == true) { // Swap front/back buffers if requested backindex = 1 - backindex; log_debug("\t\treset swapflag%s","\r\n"); swapflag = false; } log_debug("\tReset into front buffer[%d]%s",backindex,"\r\n"); buffptr = matrixbuff[1-backindex]; // Reset into front buffer } } else if(plane == 1) { log_debug("\tupdate row%s","\r\n"); _rowBus.write(row); } _dataBus=0; _oe=0; _latch=0; ptr = (uint8_t *)buffptr; log_debug("\t(row@plane)=(%d,%d)\r\n",row,plane); int color; if(plane > 0) { //ptr[i]>>2 for(int i=0; i<32; i++) { color=*(ptr+i); color=(color>>2)&0x3F; _dataBus.write(color); _sclk=1; _sclk=0; #ifdef DEBUG if(int(_dataBus)==color) { log_debug(" %02x",int(_dataBus)); } else { _dataBus=color; log_debug(" (%x->%x)%s",color,int(_dataBus),"\0"); } #endif } buffptr += _rawWidth; } else { //((ptr[i]<<4)|((ptr[i+32]<<2)&0x0C)|((ptr[i+64])&0x03)); for(int i=0; i<32; i++) { color=0x3F&((ptr[i]<<4)|((ptr[i+32]<<2)&0x0C)|((ptr[i+64])&0x03)); _dataBus.write(color); _sclk=1; _sclk=0; #ifdef DEBUG if(int(_dataBus)==color) { log_debug(" %02x",int(_dataBus)); } else { _dataBus=color; log_debug(" (%x->%x)%s",color,int(_dataBus),"\0"); } #endif } } }