/* ================================================================================= Name : PCD8544.c Version : 0.1 Copyright (C) 2010 Limor Fried, Adafruit Industries CORTEX-M3 version by Le Dang Dung, 2011 LeeDangDung@gmail.com (tested on LPC1769) Raspberry Pi version by Andre Wussow, 2012, desk@binerry.de Description : A simple PCD8544 LCD (Nokia3310/5110) driver. Target board is Raspberry Pi. This driver uses 5 GPIOs on target board with a bit-bang SPI implementation (hence, may not be as fast). Makes use of WiringPI-library of Gordon Henderson (https://projects.drogon.net/raspberry-pi/wiringpi/) Recommended connection (http://www.raspberrypi.org/archives/384): LCD pins Raspberry Pi LCD1 - GND P06 - GND LCD2 - VCC P01 - 3.3V LCD3 - CLK P11 - GPIO0 LCD4 - Din P12 - GPIO1 LCD5 - D/C P13 - GPIO2 LCD6 - CS P15 - GPIO3 LCD7 - RST P16 - GPIO4 LCD8 - LED P01 - 3.3V References : http://www.arduino.cc/playground/Code/PCD8544 http://ladyada.net/products/nokia5110/ http://code.google.com/p/meshphone/ ================================================================================ This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. ================================================================================ */ #include #include "PCD8544.h" // An abs() :) #define abs(a) (((a) < 0) ? -(a) : (a)) // bit set #define _BV(bit) (0x1 << (bit)) // LCD port variables static uint8_t cursor_x, cursor_y, textsize, textcolor; static int8_t _din, _sclk, _dc, _rst, _cs; // font bitmap static unsigned char font[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x3E, 0x5B, 0x4F, 0x5B, 0x3E, 0x3E, 0x6B, 0x4F, 0x6B, 0x3E, 0x1C, 0x3E, 0x7C, 0x3E, 0x1C, 0x18, 0x3C, 0x7E, 0x3C, 0x18, 0x1C, 0x57, 0x7D, 0x57, 0x1C, 0x1C, 0x5E, 0x7F, 0x5E, 0x1C, 0x00, 0x18, 0x3C, 0x18, 0x00, 0xFF, 0xE7, 0xC3, 0xE7, 0xFF, 0x00, 0x18, 0x24, 0x18, 0x00, 0xFF, 0xE7, 0xDB, 0xE7, 0xFF, 0x30, 0x48, 0x3A, 0x06, 0x0E, 0x26, 0x29, 0x79, 0x29, 0x26, 0x40, 0x7F, 0x05, 0x05, 0x07, 0x40, 0x7F, 0x05, 0x25, 0x3F, 0x5A, 0x3C, 0xE7, 0x3C, 0x5A, 0x7F, 0x3E, 0x1C, 0x1C, 0x08, 0x08, 0x1C, 0x1C, 0x3E, 0x7F, 0x14, 0x22, 0x7F, 0x22, 0x14, 0x5F, 0x5F, 0x00, 0x5F, 0x5F, 0x06, 0x09, 0x7F, 0x01, 0x7F, 0x00, 0x66, 0x89, 0x95, 0x6A, 0x60, 0x60, 0x60, 0x60, 0x60, 0x94, 0xA2, 0xFF, 0xA2, 0x94, 0x08, 0x04, 0x7E, 0x04, 0x08, 0x10, 0x20, 0x7E, 0x20, 0x10, 0x08, 0x08, 0x2A, 0x1C, 0x08, 0x08, 0x1C, 0x2A, 0x08, 0x08, 0x1E, 0x10, 0x10, 0x10, 0x10, 0x0C, 0x1E, 0x0C, 0x1E, 0x0C, 0x30, 0x38, 0x3E, 0x38, 0x30, 0x06, 0x0E, 0x3E, 0x0E, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x5F, 0x00, 0x00, 0x00, 0x07, 0x00, 0x07, 0x00, 0x14, 0x7F, 0x14, 0x7F, 0x14, 0x24, 0x2A, 0x7F, 0x2A, 0x12, 0x23, 0x13, 0x08, 0x64, 0x62, 0x36, 0x49, 0x56, 0x20, 0x50, 0x00, 0x08, 0x07, 0x03, 0x00, 0x00, 0x1C, 0x22, 0x41, 0x00, 0x00, 0x41, 0x22, 0x1C, 0x00, 0x2A, 0x1C, 0x7F, 0x1C, 0x2A, 0x08, 0x08, 0x3E, 0x08, 0x08, 0x00, 0x80, 0x70, 0x30, 0x00, 0x08, 0x08, 0x08, 0x08, 0x08, 0x00, 0x00, 0x60, 0x60, 0x00, 0x20, 0x10, 0x08, 0x04, 0x02, 0x3E, 0x51, 0x49, 0x45, 0x3E, 0x00, 0x42, 0x7F, 0x40, 0x00, 0x72, 0x49, 0x49, 0x49, 0x46, 0x21, 0x41, 0x49, 0x4D, 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0x00, 0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x14, 0x14, 0xF4, 0x04, 0xFC, 0x14, 0x14, 0x17, 0x10, 0x1F, 0x10, 0x10, 0x1F, 0x10, 0x1F, 0x14, 0x14, 0x14, 0x1F, 0x00, 0x10, 0x10, 0x10, 0xF0, 0x00, 0x00, 0x00, 0x00, 0x1F, 0x10, 0x10, 0x10, 0x10, 0x1F, 0x10, 0x10, 0x10, 0x10, 0xF0, 0x10, 0x00, 0x00, 0x00, 0xFF, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0x10, 0xFF, 0x10, 0x00, 0x00, 0x00, 0xFF, 0x14, 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00, 0x00, 0x1F, 0x10, 0x17, 0x00, 0x00, 0xFC, 0x04, 0xF4, 0x14, 0x14, 0x17, 0x10, 0x17, 0x14, 0x14, 0xF4, 0x04, 0xF4, 0x00, 0x00, 0xFF, 0x00, 0xF7, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0x14, 0xF7, 0x00, 0xF7, 0x14, 0x14, 0x14, 0x17, 0x14, 0x10, 0x10, 0x1F, 0x10, 0x1F, 0x14, 0x14, 0x14, 0xF4, 0x14, 0x10, 0x10, 0xF0, 0x10, 0xF0, 0x00, 0x00, 0x1F, 0x10, 0x1F, 0x00, 0x00, 0x00, 0x1F, 0x14, 0x00, 0x00, 0x00, 0xFC, 0x14, 0x00, 0x00, 0xF0, 0x10, 0xF0, 0x10, 0x10, 0xFF, 0x10, 0xFF, 0x14, 0x14, 0x14, 0xFF, 0x14, 0x10, 0x10, 0x10, 0x1F, 0x00, 0x00, 0x00, 0x00, 0xF0, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x38, 0x44, 0x44, 0x38, 0x44, 0x7C, 0x2A, 0x2A, 0x3E, 0x14, 0x7E, 0x02, 0x02, 0x06, 0x06, 0x02, 0x7E, 0x02, 0x7E, 0x02, 0x63, 0x55, 0x49, 0x41, 0x63, 0x38, 0x44, 0x44, 0x3C, 0x04, 0x40, 0x7E, 0x20, 0x1E, 0x20, 0x06, 0x02, 0x7E, 0x02, 0x02, 0x99, 0xA5, 0xE7, 0xA5, 0x99, 0x1C, 0x2A, 0x49, 0x2A, 0x1C, 0x4C, 0x72, 0x01, 0x72, 0x4C, 0x30, 0x4A, 0x4D, 0x4D, 0x30, 0x30, 0x48, 0x78, 0x48, 0x30, 0xBC, 0x62, 0x5A, 0x46, 0x3D, 0x3E, 0x49, 0x49, 0x49, 0x00, 0x7E, 0x01, 0x01, 0x01, 0x7E, 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x44, 0x44, 0x5F, 0x44, 0x44, 0x40, 0x51, 0x4A, 0x44, 0x40, 0x40, 0x44, 0x4A, 0x51, 0x40, 0x00, 0x00, 0xFF, 0x01, 0x03, 0xE0, 0x80, 0xFF, 0x00, 0x00, 0x08, 0x08, 0x6B, 0x6B, 0x08, 0x36, 0x12, 0x36, 0x24, 0x36, 0x06, 0x0F, 0x09, 0x0F, 0x06, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, 0x10, 0x10, 0x00, 0x30, 0x40, 0xFF, 0x01, 0x01, 0x00, 0x1F, 0x01, 0x01, 0x1E, 0x00, 0x19, 0x1D, 0x17, 0x12, 0x00, 0x3C, 0x3C, 0x3C, 0x3C, 0x00, 0x00, 0x00, 0x00, 0x00, }; // the memory buffer for the LCD uint8_t pcd8544_buffer[LCDWIDTH * LCDHEIGHT / 8] = {0,}; // Le: get the bitmap assistance here! : http://en.radzio.dxp.pl/bitmap_converter/ // Andre: or here! : http://www.henningkarlsen.com/electronics/t_imageconverter_mono.php const uint8_t pi_logo [] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0010 (16) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF8, 0xF8, 0xFC, 0xAE, 0x0E, 0x0E, 0x06, 0x0E, 0x06, // 0x0020 (32) pixels 0xCE, 0x86, 0x8E, 0x0E, 0x0E, 0x1C, 0xB8, 0xF0, 0xF8, 0x78, 0x38, 0x1E, 0x0E, 0x8E, 0x8E, 0xC6, // 0x0030 (48) pixels 0x0E, 0x06, 0x0E, 0x06, 0x0E, 0x9E, 0xFE, 0xFC, 0xF8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0040 (64) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0050 (80) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0060 (96) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0F, 0x0F, 0xFE, // 0x0070 (112) pixels 0xF8, 0xF0, 0x60, 0x60, 0xE0, 0xE1, 0xE3, 0xF7, 0x7E, 0x3E, 0x1E, 0x1F, 0x1F, 0x1F, 0x3E, 0x7E, // 0x0080 (128) pixels 0xFB, 0xF3, 0xE1, 0xE0, 0x60, 0x70, 0xF0, 0xF8, 0xBE, 0x1F, 0x0F, 0x07, 0x00, 0x00, 0x00, 0x00, // 0x0090 (144) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00A0 (160) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00B0 (176) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xC0, // 0x00C0 (192) pixels 0xE0, 0xFC, 0xFE, 0xFF, 0xF3, 0x38, 0x38, 0x0C, 0x0E, 0x0F, 0x0F, 0x0F, 0x0E, 0x3C, 0x38, 0xF8, // 0x00D0 (208) pixels 0xF8, 0x38, 0x3C, 0x0E, 0x0F, 0x0F, 0x0F, 0x0E, 0x0C, 0x38, 0x38, 0xF3, 0xFF, 0xFF, 0xF8, 0xE0, // 0x00E0 (224) pixels 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x00F0 (240) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0100 (256) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0110 (272) pixels 0x00, 0x7F, 0xFF, 0xE7, 0xC3, 0xC1, 0xE0, 0xFF, 0xFF, 0x78, 0xE0, 0xC0, 0xC0, 0xC0, 0xC0, 0xE0, // 0x0120 (288) pixels 0x60, 0x78, 0x38, 0x3F, 0x3F, 0x38, 0x38, 0x60, 0x60, 0xC0, 0xC0, 0xC0, 0xC0, 0xE0, 0xF8, 0x7F, // 0x0130 (304) pixels 0xFF, 0xE0, 0xC1, 0xC3, 0xE7, 0x7F, 0x3E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0140 (320) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0150 (336) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0160 (352) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x0F, 0x7F, 0xFF, 0xF1, 0xE0, 0xC0, 0x80, 0x01, // 0x0170 (368) pixels 0x03, 0x9F, 0xFF, 0xF0, 0xE0, 0xE0, 0xC0, 0xC0, 0xC0, 0xC0, 0xC0, 0xE0, 0xE0, 0xF0, 0xFF, 0x9F, // 0x0180 (384) pixels 0x03, 0x01, 0x80, 0xC0, 0xE0, 0xF1, 0x7F, 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x0190 (400) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x01A0 (416) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x01B0 (432) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, // 0x01C0 (448) pixels 0x03, 0x03, 0x07, 0x07, 0x0F, 0x1F, 0x1F, 0x3F, 0x3B, 0x71, 0x60, 0x60, 0x60, 0x60, 0x60, 0x71, // 0x01D0 (464) pixels 0x3B, 0x1F, 0x0F, 0x0F, 0x0F, 0x07, 0x03, 0x03, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x01E0 (480) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // 0x01F0 (496) pixels 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; // reduces how much is refreshed, which speeds it up! // originally derived from Steve Evans/JCW's mod but cleaned up and optimized //#define enablePartialUpdate static void my_setpixel(uint8_t x, uint8_t y, uint8_t color) { if ((x >= LCDWIDTH) || (y >= LCDHEIGHT)) return; // x is which column if (color) pcd8544_buffer[x+ (y/8)*LCDWIDTH] |= _BV(y%8); else pcd8544_buffer[x+ (y/8)*LCDWIDTH] &= ~_BV(y%8); } void LCDshowLogo() { uint32_t i; for (i = 0; i < LCDWIDTH * LCDHEIGHT / 8; i++ ) { pcd8544_buffer[i] = pi_logo[i]; } LCDdisplay(); } #ifdef enablePartialUpdate static uint8_t xUpdateMin, xUpdateMax, yUpdateMin, yUpdateMax; #endif static void updateBoundingBox(uint8_t xmin, uint8_t ymin, uint8_t xmax, uint8_t ymax) { #ifdef enablePartialUpdate if (xmin < xUpdateMin) xUpdateMin = xmin; if (xmax > xUpdateMax) xUpdateMax = xmax; if (ymin < yUpdateMin) yUpdateMin = ymin; if (ymax > yUpdateMax) yUpdateMax = ymax; #endif } void LCDInit(uint8_t SCLK, uint8_t DIN, uint8_t DC, uint8_t CS, uint8_t RST, uint8_t contrast) { _din = DIN; _sclk = SCLK; _dc = DC; _rst = RST; _cs = CS; cursor_x = cursor_y = 0; textsize = 1; textcolor = BLACK; // set pin directions pinMode(_din, OUTPUT); pinMode(_sclk, OUTPUT); pinMode(_dc, OUTPUT); pinMode(_rst, OUTPUT); pinMode(_cs, OUTPUT); // toggle RST low to reset; CS low so it'll listen to us if (_cs > 0) digitalWrite(_cs, LOW); digitalWrite(_rst, LOW); _delay_ms(500); digitalWrite(_rst, HIGH); // get into the EXTENDED mode! LCDcommand(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION ); // LCD bias select (4 is optimal?) LCDcommand(PCD8544_SETBIAS | 0x4); // set VOP if (contrast > 0x7f) contrast = 0x7f; LCDcommand( PCD8544_SETVOP | contrast); // Experimentally determined // normal mode LCDcommand(PCD8544_FUNCTIONSET); // Set display to Normal LCDcommand(PCD8544_DISPLAYCONTROL | PCD8544_DISPLAYNORMAL); // set up a bounding box for screen updates updateBoundingBox(0, 0, LCDWIDTH-1, LCDHEIGHT-1); } void LCDdrawbitmap(uint8_t x, uint8_t y,const uint8_t *bitmap, uint8_t w, uint8_t h,uint8_t color) { uint8_t j,i; for ( j=0; j= LCDHEIGHT) return; if ((x+5) >= LCDWIDTH) return; uint8_t i,j; for ( i =0; i<5; i++ ) { uint8_t d = *(font+(c*5)+i); uint8_t j; for (j = 0; j<8; j++) { if (d & _BV(j)) { my_setpixel(x+i, y+j, textcolor); } else { my_setpixel(x+i, y+j, !textcolor); } } } for ( j = 0; j<8; j++) { my_setpixel(x+5, y+j, !textcolor); } updateBoundingBox(x, y, x+5, y + 8); } void LCDwrite(uint8_t c) { if (c == '\n') { cursor_y += textsize*8; cursor_x = 0; } else if (c == '\r') { // skip em } else { LCDdrawchar(cursor_x, cursor_y, c); cursor_x += textsize*6; if (cursor_x >= (LCDWIDTH-5)) { cursor_x = 0; cursor_y+=8; } if (cursor_y >= LCDHEIGHT) cursor_y = 0; } } void LCDsetCursor(uint8_t x, uint8_t y) { cursor_x = x; cursor_y = y; } // bresenham's algorithm - thx wikpedia void LCDdrawline(uint8_t x0, uint8_t y0, uint8_t x1, uint8_t y1, uint8_t color) { uint8_t steep = abs(y1 - y0) > abs(x1 - x0); if (steep) { swap(x0, y0); swap(x1, y1); } if (x0 > x1) { swap(x0, x1); swap(y0, y1); } // much faster to put the test here, since we've already sorted the points updateBoundingBox(x0, y0, x1, y1); uint8_t dx, dy; dx = x1 - x0; dy = abs(y1 - y0); int8_t err = dx / 2; int8_t ystep; if (y0 < y1) { ystep = 1; } else { ystep = -1; } for (; x0<=x1; x0++) { if (steep) { my_setpixel(y0, x0, color); } else { my_setpixel(x0, y0, color); } err -= dy; if (err < 0) { y0 += ystep; err += dx; } } } // filled rectangle void LCDfillrect(uint8_t x, uint8_t y, uint8_t w, uint8_t h, uint8_t color) { // stupidest version - just pixels - but fast with internal buffer! uint8_t i,j; for ( i=x; i= 0) { y--; ddF_y += 2; f += ddF_y; } x++; ddF_x += 2; f += ddF_x; my_setpixel(x0 + x, y0 + y, color); my_setpixel(x0 - x, y0 + y, color); my_setpixel(x0 + x, y0 - y, color); my_setpixel(x0 - x, y0 - y, color); my_setpixel(x0 + y, y0 + x, color); my_setpixel(x0 - y, y0 + x, color); my_setpixel(x0 + y, y0 - x, color); my_setpixel(x0 - y, y0 - x, color); } } void LCDfillcircle(uint8_t x0, uint8_t y0, uint8_t r, uint8_t color) { updateBoundingBox(x0-r, y0-r, x0+r, y0+r); int8_t f = 1 - r; int8_t ddF_x = 1; int8_t ddF_y = -2 * r; int8_t x = 0; int8_t y = r; uint8_t i; for (i=y0-r; i<=y0+r; i++) { my_setpixel(x0, i, color); } while (x= 0) { y--; ddF_y += 2; f += ddF_y; } x++; ddF_x += 2; f += ddF_x; for ( i=y0-y; i<=y0+y; i++) { my_setpixel(x0+x, i, color); my_setpixel(x0-x, i, color); } for ( i=y0-x; i<=y0+x; i++) { my_setpixel(x0+y, i, color); my_setpixel(x0-y, i, color); } } } // the most basic function, set a single pixel void LCDsetPixel(uint8_t x, uint8_t y, uint8_t color) { if ((x >= LCDWIDTH) || (y >= LCDHEIGHT)) return; // x is which column if (color) pcd8544_buffer[x+ (y/8)*LCDWIDTH] |= _BV(y%8); else pcd8544_buffer[x+ (y/8)*LCDWIDTH] &= ~_BV(y%8); updateBoundingBox(x,y,x,y); } // the most basic function, get a single pixel uint8_t LCDgetPixel(uint8_t x, uint8_t y) { if ((x >= LCDWIDTH) || (y >= LCDHEIGHT)) return 0; return (pcd8544_buffer[x+ (y/8)*LCDWIDTH] >> (7-(y%8))) & 0x1; } void LCDspiwrite(uint8_t c) { digitalWrite(_cs, LOW); //bugfix shiftOut(_din, _sclk, MSBFIRST, c); digitalWrite(_cs, HIGH); //bugfix } void LCDcommand(uint8_t c) { digitalWrite( _dc, LOW); LCDspiwrite(c); } void LCDdata(uint8_t c) { digitalWrite(_dc, HIGH); LCDspiwrite(c); } void LCDsetContrast(uint8_t val) { if (val > 0x7f) { val = 0x7f; } LCDcommand(PCD8544_FUNCTIONSET | PCD8544_EXTENDEDINSTRUCTION ); LCDcommand( PCD8544_SETVOP | val); LCDcommand(PCD8544_FUNCTIONSET); } void LCDdisplay(void) { uint8_t col, maxcol, p; for(p = 0; p < 6; p++) { #ifdef enablePartialUpdate // check if this page is part of update if ( yUpdateMin >= ((p+1)*8) ) { continue; // nope, skip it! } if (yUpdateMax < p*8) { break; } #endif LCDcommand(PCD8544_SETYADDR | p); #ifdef enablePartialUpdate col = xUpdateMin; maxcol = xUpdateMax; #else // start at the beginning of the row col = 0; maxcol = LCDWIDTH-1; #endif LCDcommand(PCD8544_SETXADDR | col); for(; col <= maxcol; col++) { //uart_putw_dec(col); //uart_putchar(' '); LCDdata(pcd8544_buffer[(LCDWIDTH*p)+col]); } } LCDcommand(PCD8544_SETYADDR ); // no idea why this is necessary but it is to finish the last byte? #ifdef enablePartialUpdate xUpdateMin = LCDWIDTH - 1; xUpdateMax = 0; yUpdateMin = LCDHEIGHT-1; yUpdateMax = 0; #endif } // clear everything void LCDclear(void) { //memset(pcd8544_buffer, 0, LCDWIDTH*LCDHEIGHT/8); uint32_t i; for ( i = 0; i < LCDWIDTH*LCDHEIGHT/8 ; i++) pcd8544_buffer[i] = 0; updateBoundingBox(0, 0, LCDWIDTH-1, LCDHEIGHT-1); cursor_y = cursor_x = 0; } // bitbang serial shift out on select GPIO pin. Data rate is defined by CPU clk speed and CLKCONST_2. // Calibrate these value for your need on target platform. void shiftOut(uint8_t dataPin, uint8_t clockPin, uint8_t bitOrder, uint8_t val) { uint8_t i; uint32_t j; for (i = 0; i < 8; i++) { if (bitOrder == LSBFIRST) digitalWrite(dataPin, !!(val & (1 << i))); else digitalWrite(dataPin, !!(val & (1 << (7 - i)))); digitalWrite(clockPin, HIGH); for (j = CLKCONST_2; j > 0; j--); // clock speed, anyone? (LCD Max CLK input: 4MHz) digitalWrite(clockPin, LOW); } } // roughly calibrated spin delay void _delay_ms(uint32_t t) { uint32_t nCount = 0; while (t != 0) { nCount = CLKCONST_1; while(nCount != 0) nCount--; t--; } } //#include #include //#include "nan.h" using v8::FunctionCallbackInfo; using v8::Exception; using v8::Isolate; using v8::Local; using v8::Object; using v8::String; using v8::Value; void init(const FunctionCallbackInfo& args) { // Default pin setup int x_din = 1; int x_sclk = 0; int x_dc = 2; int x_rst = 4; int x_cs = 3; // lcd contrast //may be need modify to fit your screen! normal: 30- 90, default is:45 !!!maybe modify this value! int xcontrast = 60; // check wiringPi setup if (wiringPiSetup() == -1) { printf("wiringPi-Error\n"); } // init and clear lcd // TODO: handle different input values for GPIOs LCDInit(x_sclk, x_din, x_dc, x_cs, x_rst, xcontrast); LCDclear(); // show logo // LCDshowLogo(); delay(2000); LCDclear(); } void setcontrast(const FunctionCallbackInfo& args) { Isolate* isolate = args.GetIsolate(); // Check the number of arguments passed. if (args.Length() < 1) { // Throw an Error that is passed back to JavaScript isolate->ThrowException(Exception::TypeError( String::NewFromUtf8(isolate, "Wrong number of arguments"))); return; } // Check the argument types if (!args[0]->IsNumber()) { isolate->ThrowException(Exception::TypeError( String::NewFromUtf8(isolate, "Wrong arguments"))); return; } LCDsetContrast((uint8_t)args[0]->NumberValue()); } void clear(const FunctionCallbackInfo& args) { LCDclear(); } #if 0 // This is an unlucky try with NAN NAN_METHOD(drawstring) { NanScope(); static NanAsciiString *str; str = new NanAsciiString(arg[2]); NanReturnUndefined(); LCDdrawstring_P(args[0]->NumberValue(), args[1]->NumberValue(), str ? str : ""); LCDdisplay(); delay(100000); } #endif void drawstring(const FunctionCallbackInfo& args) { Isolate* isolate = args.GetIsolate(); // Check the number of arguments passed. if (args.Length() < 3) { // Throw an Error that is passed back to JavaScript isolate->ThrowException(Exception::TypeError( String::NewFromUtf8(isolate, "Wrong number of arguments"))); return; } // Check the argument types if (!args[0]->IsNumber() || !args[1]->IsNumber() || !args[2]->IsString()) { isolate->ThrowException(Exception::TypeError( String::NewFromUtf8(isolate, "Wrong arguments"))); return; } v8::String::Utf8Value arg2(args[2]); const char* s = *arg2; LCDdrawstring( args[0]->NumberValue(), args[1]->NumberValue(), s ? s : ""); } void display(const FunctionCallbackInfo& args) { LCDdisplay(); } void Initialize(Local exports) { NODE_SET_METHOD(exports, "init", init); NODE_SET_METHOD(exports, "setcontrast", setcontrast); NODE_SET_METHOD(exports, "clear", clear); NODE_SET_METHOD(exports, "drawstring", drawstring); NODE_SET_METHOD(exports, "display", display); } NODE_MODULE(pcd8544_rpi, Initialize)