SSD1306 LCD 96x16 model
Dependents: testSoftware8_alles_display
Fork of ssd1306_library by
Diff: ssd1306.cpp
- Revision:
- 0:3d84b3bfb794
- Child:
- 1:c5cf4ca5939f
diff -r 000000000000 -r 3d84b3bfb794 ssd1306.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/ssd1306.cpp Wed Oct 25 16:28:07 2017 +0200 @@ -0,0 +1,369 @@ +#include "ssd1306.h" +#include "mbed.h" + +static const char charset[2048] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7E, 0x81, + 0x95, 0xB1, 0xB1, 0x95, 0x81, 0x7E, 0x7E, 0xFF, 0xEB, 0xCF, + 0xCF, 0xEB, 0xFF, 0x7E, 0x0E, 0x1F, 0x3F, 0x7E, 0x3F, 0x1F, + 0x0E, 0x00, 0x08, 0x1C, 0x3E, 0x7F, 0x3E, 0x1C, 0x08, 0x00, + 0x38, 0x3A, 0x9F, 0xFF, 0x9F, 0x3A, 0x38, 0x00, 0x18, 0x3C, + 0xBE, 0xFF, 0xBE, 0x3C, 0x18, 0x00, 0x00, 0x00, 0x18, 0x3C, + 0x3C, 0x18, 0x00, 0x00, 0xFF, 0xFF, 0xE7, 0xC3, 0xC3, 0xE7, + 0xFF, 0xFF, 0x00, 0x3C, 0x66, 0x42, 0x42, 0x66, 0x3C, 0x00, + 0xFF, 0xC3, 0x99, 0xBD, 0xBD, 0x99, 0xC3, 0xFF, 0x70, 0xF8, + 0x88, 0x88, 0xFD, 0x7F, 0x07, 0x0F, 0x00, 0x4E, 0x5F, 0xF1, + 0xF1, 0x5F, 0x4E, 0x00, 0xC0, 0xE0, 0xFF, 0x7F, 0x05, 0x05, + 0x07, 0x07, 0xC0, 0xFF, 0x7F, 0x05, 0x05, 0x65, 0x7F, 0x3F, + 0x5A, 0x5A, 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0xFF, 0x14, 0x14, 0x14, 0x10, 0x10, 0x10, 0x1F, + 0x1F, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xF0, 0xF0, 0x10, + 0x10, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, + 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xF0, 0xFF, 0xFF, + 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0xFF, 0xFF, 0xFF, 0xFF, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, 0x0F, + 0x0F, 0x0F, 0x38, 0x7C, 0x44, 0x6C, 0x38, 0x6C, 0x44, 0x00, + 0x7E, 0x7F, 0x01, 0x09, 0x5F, 0x76, 0x20, 0x00, 0x7F, 0x7F, + 0x01, 0x01, 0x01, 0x03, 0x03, 0x00, 0x04, 0x7C, 0x7C, 0x04, + 0x7C, 0x7C, 0x04, 0x00, 0x63, 0x77, 0x5D, 0x49, 0x41, 0x63, + 0x63, 0x00, 0x38, 0x7C, 0x44, 0x7C, 0x3C, 0x04, 0x04, 0x00, + 0x80, 0xFC, 0x7C, 0x40, 0x40, 0x7C, 0x3C, 0x00, 0x04, 0x06, + 0x02, 0x7E, 0x7C, 0x06, 0x02, 0x00, 0x00, 0x99, 0xBD, 0xE7, + 0xE7, 0xBD, 0x99, 0x00, 0x1C, 0x3E, 0x6B, 0x49, 0x6B, 0x3E, + 0x1C, 0x00, 0x4C, 0x7E, 0x73, 0x01, 0x73, 0x7E, 0x4C, 0x00, + 0x00, 0x30, 0x78, 0x4A, 0x4F, 0x7D, 0x39, 0x00, 0x18, 0x3C, + 0x24, 0x3C, 0x3C, 0x24, 0x3C, 0x18, 0x98, 0xFC, 0x64, 0x3C, + 0x3E, 0x27, 0x3D, 0x18, 0x00, 0x1C, 0x3E, 0x6B, 0x49, 0x49, + 0x49, 0x00, 0x7C, 0x7E, 0x02, 0x02, 0x02, 0x7E, 0x7C, 0x00, + 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x2A, 0x00, 0x00, 0x44, + 0x44, 0x5F, 0x5F, 0x44, 0x44, 0x00, 0x00, 0x40, 0x51, 0x5B, + 0x4E, 0x44, 0x40, 0x00, 0x00, 0x40, 0x44, 0x4E, 0x5B, 0x51, + 0x40, 0x00, 0x00, 0x00, 0x00, 0xFE, 0xFF, 0x01, 0x07, 0x06, + 0x60, 0xE0, 0x80, 0xFF, 0x7F, 0x00, 0x00, 0x00, 0x00, 0x08, + 0x08, 0x2A, 0x2A, 0x08, 0x08, 0x00, 0x24, 0x36, 0x12, 0x36, + 0x24, 0x36, 0x12, 0x00, 0x00, 0x06, 0x0F, 0x09, 0x0F, 0x06, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x08, 0x08, 0x00, 0x00, 0x00, 0x10, 0x30, + 0x70, 0xC0, 0xFF, 0xFF, 0x01, 0x01, 0x00, 0x01, 0x1F, 0x1E, + 0x01, 0x1F, 0x1E, 0x00, 0x00, 0x11, 0x19, 0x1D, 0x17, 0x12, + 0x00, 0x00, 0x00, 0x00, 0x3C, 0x3C, 0x3C, 0x3C, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 +}; + + +SSD1306::SSD1306 (PinName sda, PinName scl) +{ + idxfb = 0; + fb = new char[1024]; + if (!fb) + { + printf ("SSD1306: Framebuffer allocation failed!\r\n"); + for (;;) { } + } + + bus = new I2C (sda, scl); + ssd1306_i2c_addr = scan(); + if (ssd1306_i2c_addr != 0x78 && ssd1306_i2c_addr != 0x7A) + { + printf ("SSD1306: slave not found!. "); + if (ssd1306_i2c_addr != 0) + printf ("Found I2C slave at 0x%02.2X\r\n", ssd1306_i2c_addr); + else + printf ("\r\n"); + for (;;) { } + } +#ifdef SSD1306_DEBUG + printf ("SSD1306 debug: fb = 0x%08.8X\r\n", fb); + printf ("SSD1306 debug: I2C addr = 0x%02.2X\r\n", ssd1306_i2c_addr); +#endif + + +} + +void SSD1306::speed (I2CSpeed spd) +{ + switch (spd) + { + case I2CSpeed::Low: bus->frequency(100000); break; + case I2CSpeed::Medium: bus->frequency(400000); break; + case I2CSpeed::Fast: bus->frequency(1000000); break; + } +} + +char SSD1306::scan (void) +{ + int addr; + int res; + char i2caddr = 0; + + for (addr=0; addr<256; addr++) { + res = bus->write (addr, NULL, 0); + if (res == 0) + i2caddr = addr & 0xFE; + } + return i2caddr; +} + +int SSD1306::command_data (char c, char c_or_d, char lastitem) +{ + int res; + + bus->start(); + res = bus->write(ssd1306_i2c_addr); if (!res) goto terminate_transaction; + res = bus->write(c_or_d | lastitem); if (!res) goto terminate_transaction; + res = bus->write(c); if (!res) goto terminate_transaction; + + terminate_transaction: + bus->stop(); + return res; +} + +int SSD1306::command (char c) +{ + return command_data (c, IS_COMMAND, IS_LAST); +} + +int SSD1306::data (char d) +{ + return command_data (d, IS_DATA, IS_LAST); +} + +int SSD1306::init (void) +{ + static char comando[] = {0x80, SSD1306_DISPLAYOFF, 0x80, SSD1306_CHARGEPUMP, 0x80, 0x14, 0x80, SSD1306_MEMORYMODE, 0x80, 0x00, 0x80, SSD1306_SEGREMAP | 0x1, + 0x80, SSD1306_COMSCANDEC, 0x80, SSD1306_SETCONTRAST, 0x80, 0x7F, 0x00, SSD1306_DISPLAYON + }; + + return bus->write (ssd1306_i2c_addr, comando, sizeof comando); +} + +void SSD1306::scroll (void) +{ + int i; + + for (i=128; i<1024; i++) + fb[i-128] = fb[i]; + for (i=896; i<1024; i++) + fb[i] = 0; +} + +void SSD1306::putchar (char c) +{ + int idx,i; + + idx = c*8; + for (i=0; i<8; i++) { + fb[idxfb] = charset[idx+i]; + idxfb++; + if (idxfb == 1024) { + scroll(); + idxfb = 896; + } + } +} + +void SSD1306::display(void) +{ + int i; + + command (0xb0); + command (SSD1306_SETLOWCOLUMN | 0x0); // low col = 0 + command (SSD1306_SETHIGHCOLUMN | 0x0); // hi col = 0 + command (SSD1306_SETSTARTLINE | 0x0); // line #0 + + bus->start(); + bus->write (ssd1306_i2c_addr); + bus->write (0x40); + for (i=0; i<1024; i++) { + bus->write (fb[i]); + } + bus->stop(); +} + +void SSD1306::set_contrast (char v) +{ + command (SSD1306_SETCONTRAST); + command (v); +} + +void SSD1306::cls (void) +{ + int i; + + for (i=0; i<1024; i++) { + fb[i] = 0; + } + idxfb = 0; +} + +void SSD1306::plot (char x, char y, PlotStyle modo) +{ + x = x % 128; + y = y % 64; + + switch (modo) + { + case PlotStyle::Normal: fb[(y/8)*128+x] |= (1<<(y%8)); break; + case PlotStyle::Inverse: fb[(y/8)*128+x] &= ~(1<<(y%8)); break; + case PlotStyle::Xor: fb[(y/8)*128+x] ^= (1<<(y%8)); break; + } +}