#include "ssd1306.h" // Write command to OLED static void WriteCommand(unsigned char command) { SSD_CS_Low(); SSD_A0_Low(); SPI_SendByte(command); SSD_CS_High(); } // Write data to OLED static void WriteData(unsigned char data) { SSD_CS_Low(); SSD_A0_High(); SPI_SendByte(data); SSD_CS_High(); } // Initialize OLED void ssd1306_init(void) { /* Generate a reset */ SSD_Reset_Low(); uint32_t i; for(i=5000; i>1; i--) SSD_Reset_High(); WriteCommand(0xAE); WriteCommand(0xD5); WriteCommand(0x80); WriteCommand(0xA8); WriteCommand(0x1F); WriteCommand(0xD3); WriteCommand(0x00); WriteCommand(0x40 | 0x00); // line #0 WriteCommand(0x8D); WriteCommand(0x14); //10 or 14 if not externalvcc WriteCommand(0x20); WriteCommand(0x00); // WriteCommand(0xA0 | 0x1); // segremap (normal) WriteCommand(0xA0); // segremap (flip) // WriteCommand(0xC8); // comscandec (normal) WriteCommand(0xC0); // comscandec (flip) WriteCommand(0xDA); // setcompins WriteCommand(0x02); WriteCommand(0x81); // contrast WriteCommand(0x0F); // contrast value. 8f is a good one. WriteCommand(0xD9); WriteCommand(0xF1); //22 or F1 if not externalvcc WriteCommand(0xDB); WriteCommand(0x40); WriteCommand(0xA4); // dispalyallon_resume WriteCommand(0xA6); // normaldisplay WriteCommand(0xAF); // display on } // Times New Roman font static const char fontData[][5] = { // Refer to "Times New Roman" Font Database // Basic Characters {0x00,0x00,0x00,0x00,0x00}, // ( 0) - 0x0020 No-Break Space {0x00,0x00,0x4F,0x00,0x00}, // ( 1) ! - 0x0021 Exclamation Mark {0x00,0x07,0x00,0x07,0x00}, // ( 2) " - 0x0022 Quotation Mark {0x14,0x7F,0x14,0x7F,0x14}, // ( 3) # - 0x0023 Number Sign {0x24,0x2A,0x7F,0x2A,0x12}, // ( 4) $ - 0x0024 Dollar Sign {0x23,0x13,0x08,0x64,0x62}, // ( 5) % - 0x0025 Percent Sign {0x36,0x49,0x55,0x22,0x50}, // ( 6) & - 0x0026 Ampersand {0x00,0x05,0x03,0x00,0x00}, // ( 7) ' - 0x0027 Apostrophe {0x00,0x1C,0x22,0x41,0x00}, // ( 8) ( - 0x0028 Left Parenthesis {0x00,0x41,0x22,0x1C,0x00}, // ( 9) ) - 0x0029 Right Parenthesis {0x14,0x08,0x3E,0x08,0x14}, // ( 10) * - 0x002A Asterisk {0x08,0x08,0x3E,0x08,0x08}, // ( 11) + - 0x002B Plus Sign {0x00,0x50,0x30,0x00,0x00}, // ( 12) , - 0x002C Comma {0x08,0x08,0x08,0x08,0x08}, // ( 13) - - 0x002D Hyphen-Minus {0x00,0x60,0x60,0x00,0x00}, // ( 14) . - 0x002E Full Stop {0x20,0x10,0x08,0x04,0x02}, // ( 15) / - 0x002F Solidus {0x3E,0x51,0x49,0x45,0x3E}, // ( 16) 0 - 0x0030 Digit Zero {0x00,0x42,0x7F,0x40,0x00}, // ( 17) 1 - 0x0031 Digit One {0x42,0x61,0x51,0x49,0x46}, // ( 18) 2 - 0x0032 Digit Two {0x21,0x41,0x45,0x4B,0x31}, // ( 19) 3 - 0x0033 Digit Three {0x18,0x14,0x12,0x7F,0x10}, // ( 20) 4 - 0x0034 Digit Four {0x27,0x45,0x45,0x45,0x39}, // ( 21) 5 - 0x0035 Digit Five {0x3C,0x4A,0x49,0x49,0x30}, // ( 22) 6 - 0x0036 Digit Six {0x01,0x71,0x09,0x05,0x03}, // ( 23) 7 - 0x0037 Digit Seven {0x36,0x49,0x49,0x49,0x36}, // ( 24) 8 - 0x0038 Digit Eight {0x06,0x49,0x49,0x29,0x1E}, // ( 25) 9 - 0x0039 Dight Nine {0x00,0x36,0x36,0x00,0x00}, // ( 26) : - 0x003A Colon {0x00,0x56,0x36,0x00,0x00}, // ( 27) ; - 0x003B Semicolon {0x08,0x14,0x22,0x41,0x00}, // ( 28) < - 0x003C Less-Than Sign {0x14,0x14,0x14,0x14,0x14}, // ( 29) = - 0x003D Equals Sign {0x00,0x41,0x22,0x14,0x08}, // ( 30) > - 0x003E Greater-Than Sign {0x02,0x01,0x51,0x09,0x06}, // ( 31) ? - 0x003F Question Mark {0x32,0x49,0x79,0x41,0x3E}, // ( 32) @ - 0x0040 Commercial At {0x7E,0x11,0x11,0x11,0x7E}, // ( 33) A - 0x0041 Latin Capital Letter A {0x7F,0x49,0x49,0x49,0x36}, // ( 34) B - 0x0042 Latin Capital Letter B {0x3E,0x41,0x41,0x41,0x22}, // ( 35) C - 0x0043 Latin Capital Letter C {0x7F,0x41,0x41,0x22,0x1C}, // ( 36) D - 0x0044 Latin Capital Letter D {0x7F,0x49,0x49,0x49,0x41}, // ( 37) E - 0x0045 Latin Capital Letter E {0x7F,0x09,0x09,0x09,0x01}, // ( 38) F - 0x0046 Latin Capital Letter F {0x3E,0x41,0x49,0x49,0x7A}, // ( 39) G - 0x0047 Latin Capital Letter G {0x7F,0x08,0x08,0x08,0x7F}, // ( 40) H - 0x0048 Latin Capital Letter H {0x00,0x41,0x7F,0x41,0x00}, // ( 41) I - 0x0049 Latin Capital Letter I {0x20,0x40,0x41,0x3F,0x01}, // ( 42) J - 0x004A Latin Capital Letter J {0x7F,0x08,0x14,0x22,0x41}, // ( 43) K - 0x004B Latin Capital Letter K {0x7F,0x40,0x40,0x40,0x40}, // ( 44) L - 0x004C Latin Capital Letter L {0x7F,0x02,0x0C,0x02,0x7F}, // ( 45) M - 0x004D Latin Capital Letter M {0x7F,0x04,0x08,0x10,0x7F}, // ( 46) N - 0x004E Latin Capital Letter N {0x3E,0x41,0x41,0x41,0x3E}, // ( 47) O - 0x004F Latin Capital Letter O {0x7F,0x09,0x09,0x09,0x06}, // ( 48) P - 0x0050 Latin Capital Letter P {0x3E,0x41,0x51,0x21,0x5E}, // ( 49) Q - 0x0051 Latin Capital Letter Q {0x7F,0x09,0x19,0x29,0x46}, // ( 50) R - 0x0052 Latin Capital Letter R {0x46,0x49,0x49,0x49,0x31}, // ( 51) S - 0x0053 Latin Capital Letter S {0x01,0x01,0x7F,0x01,0x01}, // ( 52) T - 0x0054 Latin Capital Letter T {0x3F,0x40,0x40,0x40,0x3F}, // ( 53) U - 0x0055 Latin Capital Letter U {0x1F,0x20,0x40,0x20,0x1F}, // ( 54) V - 0x0056 Latin Capital Letter V {0x3F,0x40,0x38,0x40,0x3F}, // ( 55) W - 0x0057 Latin Capital Letter W {0x63,0x14,0x08,0x14,0x63}, // ( 56) X - 0x0058 Latin Capital Letter X {0x07,0x08,0x70,0x08,0x07}, // ( 57) Y - 0x0059 Latin Capital Letter Y {0x61,0x51,0x49,0x45,0x43}, // ( 58) Z - 0x005A Latin Capital Letter Z {0x00,0x7F,0x41,0x41,0x00}, // ( 59) [ - 0x005B Left Square Bracket {0x02,0x04,0x08,0x10,0x20}, // ( 60) \ - 0x005C Reverse Solidus {0x00,0x41,0x41,0x7F,0x00}, // ( 61) ] - 0x005D Right Square Bracket {0x04,0x02,0x01,0x02,0x04}, // ( 62) ^ - 0x005E Circumflex Accent {0x40,0x40,0x40,0x40,0x40}, // ( 63) _ - 0x005F Low Line {0x01,0x02,0x04,0x00,0x00}, // ( 64) ` - 0x0060 Grave Accent {0x20,0x54,0x54,0x54,0x78}, // ( 65) a - 0x0061 Latin Small Letter A {0x7F,0x48,0x44,0x44,0x38}, // ( 66) b - 0x0062 Latin Small Letter B {0x38,0x44,0x44,0x44,0x20}, // ( 67) c - 0x0063 Latin Small Letter C {0x38,0x44,0x44,0x48,0x7F}, // ( 68) d - 0x0064 Latin Small Letter D {0x38,0x54,0x54,0x54,0x18}, // ( 69) e - 0x0065 Latin Small Letter E {0x08,0x7E,0x09,0x01,0x02}, // ( 70) f - 0x0066 Latin Small Letter F {0x06,0x49,0x49,0x49,0x3F}, // ( 71) g - 0x0067 Latin Small Letter G {0x7F,0x08,0x04,0x04,0x78}, // ( 72) h - 0x0068 Latin Small Letter H {0x00,0x44,0x7D,0x40,0x00}, // ( 73) i - 0x0069 Latin Small Letter I {0x20,0x40,0x44,0x3D,0x00}, // ( 74) j - 0x006A Latin Small Letter J {0x7F,0x10,0x28,0x44,0x00}, // ( 75) k - 0x006B Latin Small Letter K {0x00,0x41,0x7F,0x40,0x00}, // ( 76) l - 0x006C Latin Small Letter L {0x7C,0x04,0x18,0x04,0x7C}, // ( 77) m - 0x006D Latin Small Letter M {0x7C,0x08,0x04,0x04,0x78}, // ( 78) n - 0x006E Latin Small Letter N {0x38,0x44,0x44,0x44,0x38}, // ( 79) o - 0x006F Latin Small Letter O {0x7C,0x14,0x14,0x14,0x08}, // ( 80) p - 0x0070 Latin Small Letter P {0x08,0x14,0x14,0x18,0x7C}, // ( 81) q - 0x0071 Latin Small Letter Q {0x7C,0x08,0x04,0x04,0x08}, // ( 82) r - 0x0072 Latin Small Letter R {0x48,0x54,0x54,0x54,0x20}, // ( 83) s - 0x0073 Latin Small Letter S {0x04,0x3F,0x44,0x40,0x20}, // ( 84) t - 0x0074 Latin Small Letter T {0x3C,0x40,0x40,0x20,0x7C}, // ( 85) u - 0x0075 Latin Small Letter U {0x1C,0x20,0x40,0x20,0x1C}, // ( 86) v - 0x0076 Latin Small Letter V {0x3C,0x40,0x30,0x40,0x3C}, // ( 87) w - 0x0077 Latin Small Letter W {0x44,0x28,0x10,0x28,0x44}, // ( 88) x - 0x0078 Latin Small Letter X {0x0C,0x50,0x50,0x50,0x3C}, // ( 89) y - 0x0079 Latin Small Letter Y {0x44,0x64,0x54,0x4C,0x44}, // ( 90) z - 0x007A Latin Small Letter Z {0x00,0x08,0x36,0x41,0x00}, // ( 91) { - 0x007B Left Curly Bracket {0x00,0x00,0x7F,0x00,0x00}, // ( 92) | - 0x007C Vertical Line {0x00,0x41,0x36,0x08,0x00}, // ( 93) } - 0x007D Right Curly Bracket {0x02,0x01,0x02,0x04,0x02}, // ( 94) ~ - 0x007E Tilde {0x08,0x14,0x2A,0x14,0x22}, // ( 95) << - 0x00AB Left-Pointing Double Angle Quotation Mark {0x00,0x02,0x05,0x02,0x00}, // ( 96) - 0x00B0 Degree Sign // {0x44,0x44,0x5F,0x44,0x44}, // ( 97) +- - 0x00B1 Plus-Minus Sign // {0x7E,0x20,0x20,0x10,0x3E}, // ( 98) u - 0x00B5 Micro Sign // {0x22,0x14,0x2A,0x14,0x08}, // ( 99) >> - 0x00BB Right-Pointing Double Angle Quotation Mark // {0x30,0x48,0x45,0x40,0x20}, // (100) ? - 0x00BF Inverted Question Mark // {0x22,0x14,0x08,0x14,0x22}, // (101) x - 0x00D7 Multiplcation Sign // {0x08,0x08,0x2A,0x08,0x08}, // (102) + - 0x00F7 Division Sign // {0x18,0x14,0x08,0x14,0x0C}, // (103) - 0x221E Infinity // {0x44,0x4A,0x4A,0x51,0x51}, // (104) < - 0x2264 Less-Than or Equal to // {0x51,0x51,0x4A,0x4A,0x44}, // (105) > - 0x2265 Greater-Than or Equal to // {0x54,0x14,0x64,0x08,0x70}, // (106) .: - RF Symbol // {0x70,0x7C,0x72,0x7C,0x70}, // (107) ^ - Lock symbol // {0x70,0x5C,0x52,0x54,0x70}, // (108) / - Unlock symbol // {0x0C,0x1E,0x3C,0x1E,0x0C}, // (109) <3 - Heart Symbol // {0x18,0x22,0xFF,0x12,0x0C}, // (110) U - USB Symbol }; static void setStartPage(unsigned char d) { WriteCommand(0xB0|d); // Set Page Start Address for Page Addressing Mode // Default => 0xB0 (0x00) } /* Below are functions used to configure the OLED */ static void setStartColumn(unsigned char d) { WriteCommand(0x00+d%16); // Set Lower Column Start Address for Page Addressing Mode WriteCommand(0x10+d/16); // Set Higher Column Start Address for Page Addressing Mode // Default => 0x10 } const uint8_t row[4][32] = { {0x00,0x00,0x01,0x03,0x07,0x0F,0x1E,0x3C,0x3C,0x7C,0x7C,0x7C,0xFC,0xFF,0xFF,0xFC,0xFC,0xFC,0xFC,0xFF,0x7F,0x7F,0x7F,0x3C,0x3C,0x1C,0x0C,0x06,0x03,0x01,0x00,0x00}, {0x0F,0x7F,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x3F,0x3F,0x7F,0xFF,0xFF,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x7F,0x0F}, {0xF0,0xFE,0xFF,0xFF,0xFF,0xC7,0x00,0x00,0x00,0x00,0x87,0xC7,0xC7,0xFF,0xFF,0x00,0x00,0x00,0x00,0x87,0x87,0xC7,0xC3,0x03,0x07,0x07,0x0F,0x7F,0xFF,0xFF,0xFE,0xF0}, {0x00,0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFC,0xFE,0xFE,0xFE,0xFF,0xFF,0xFF,0x1F,0x1F,0x1F,0x1F,0xFF,0xFE,0xFE,0xFE,0xFC,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,0x00}, }; void ssd1306_clearscreen() { uint8_t i = 0; uint8_t page = 0; for(page = 0; page<4; page++) { setStartPage(page); setStartColumn(0); for(i = 0; i<128; i++) { WriteData(0x00); } } WriteData(0x00); } void ssd1306_drawlogo() { uint8_t i = 0; setStartPage(3); setStartColumn(0); for(i = 0; i<32; i++) { WriteData(row[0][i]); } WriteData(0x00); setStartPage(2); setStartColumn(0); for(i = 0; i<32; i++) { WriteData(row[1][i]); } WriteData(0x00); setStartPage(1); setStartColumn(0); for(i = 0; i<32; i++) { WriteData(row[2][i]); } WriteData(0x00); setStartPage(0); setStartColumn(0); for(i = 0; i < 32; i++) { WriteData(row[3][i]); } WriteData(0x00); } /* Print a single character from font.cpp */ void ssd1306_drawchar(char ascii, unsigned char row, unsigned char xPos) { const char *srcPointer = (char*)-1; srcPointer = &fontData[(ascii-32)][0]; setStartPage(row); setStartColumn(xPos); for(uint8_t i = 0; i < 5; i++) { WriteData(*srcPointer); srcPointer++; } WriteData(0x00); } void ssd1306_drawcharbig(char ascii, unsigned char row, unsigned char xPos) { const char *srcPointer = (char*)-1; srcPointer = &fontData[(ascii-32)][0]; setStartPage(row-1); setStartColumn(xPos); // Write first row for(uint8_t i = 0; i < 5; i++) { uint8_t data = 0; data |= ((*srcPointer) & 0b1000) << 4; // get top 4 bits data |= ((*srcPointer) & 0b1000) << 3; // get top 4 bits data |= ((*srcPointer) & 0b0100) << 3; // get top 4 bits data |= ((*srcPointer) & 0b0100) << 2; // get top 4 bits data |= ((*srcPointer) & 0b0010) << 2; // get top 4 bits data |= ((*srcPointer) & 0b0010) << 1; // get top 4 bits data |= ((*srcPointer) & 0b0001) << 1; // get top 4 bits data |= ((*srcPointer) & 0b0001); // get top 4 bits WriteData(data); WriteData(data); srcPointer++; } WriteData(0x00); srcPointer -= 5; setStartPage(row); setStartColumn(xPos); // Write second row for(uint8_t i = 0; i < 5; i++) { uint8_t data = 0; data |= (*srcPointer) & 0b10000000; // get top 4 bits data |= ((*srcPointer) & 0b10000000) >> 1; // get top 4 bits data |= ((*srcPointer) & 0b01000000) >> 1; // get top 4 bits data |= ((*srcPointer) & 0b01000000) >> 2; // get top 4 bits data |= ((*srcPointer) & 0b00100000) >> 2; // get top 4 bits data |= ((*srcPointer) & 0b00100000) >> 3; // get top 4 bits data |= ((*srcPointer) & 0b00010000) >> 3; // get top 4 bits data |= ((*srcPointer) & 0b00010000) >> 4; // get top 4 bits WriteData(data); WriteData(data); srcPointer++; } WriteData(0x00); } void ssd1306_drawstring(const char *dataPtr, unsigned char row, unsigned char xPos) { char *srcPointer; srcPointer = (char*)dataPtr; ssd1306_drawchar(' ',row,xPos); // NBSP must be written first before the string start while(1) { ssd1306_drawchar(*srcPointer,row,xPos); srcPointer++; xPos+=6; if(*srcPointer == 0) break; } } void ssd1306_drawstringbig(const char *dataPtr, unsigned char row, unsigned char xPos) { char *srcPointer; srcPointer = (char*)dataPtr; ssd1306_drawcharbig(' ',row,xPos); // NBSP must be written first before the string start while(1) { ssd1306_drawcharbig(*srcPointer,row,xPos); srcPointer++; xPos+=12; if(*srcPointer == 0) break; } } // vim:softtabstop=4 shiftwidth=4 expandtab