Richard Kuo
mbed I2C to LCD for drawing a moving circle
Diff: ssd1306.cpp
- Revision:
- 0:5e40d147a8e1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/ssd1306.cpp Thu Oct 20 13:05:10 2016 +0000
@@ -0,0 +1,411 @@
+// SSD1306Z LCD Driver: 0.96" lcd LY096BG30
+#include "mbed.h"
+#include "ssd1306.h"
+#include "Font8x16.h"
+#include "Font5x7.h"
+
+I2C ssd1306_i2c(PD_12, PD_10); // I2C1_SDA, I2C1_SCL
+
+char DisplayBuffer[128*8];
+
+void lcdWriteCommand(uint8_t lcd_Command)
+{
+ char data[2];
+ data[0]=0x00;
+ data[1]=lcd_Command;
+ ssd1306_i2c.write(SSD1306_slave_addr, data, 2, 0);
+}
+
+void lcdWriteData(uint8_t lcd_Data)
+{
+ char data[2];
+ data[0]=0x40;
+ data[1]=lcd_Data;
+ ssd1306_i2c.write(SSD1306_slave_addr, data, 2, 0);
+}
+
+void lcdSetAddr(uint8_t column, uint8_t page)
+{
+ lcdWriteCommand(0xb0+page); // set page address
+ lcdWriteCommand(0x10 | ((column & 0xf0) >> 4)); // set column address MSB
+ lcdWriteCommand(0x00 | (column & 0x0f) ); // set column address LSB
+}
+
+void SSD1306::initialize(void)
+{
+ lcdWriteCommand(0xae); //display off
+ lcdWriteCommand(0x20); //Set Memory Addressing Mode
+ lcdWriteCommand(0x10); //00,Horizontal Addressing Mode;01,Vertical Addressing Mode;10,Page Addressing Mode (RESET);11,Invalid
+ lcdWriteCommand(0xb0); //Set Page Start Address for Page Addressing Mode,0-7
+ lcdWriteCommand(0xc8); //Set COM Output Scan Direction
+ lcdWriteCommand(0x00);//---set low column address
+ lcdWriteCommand(0x10);//---set high column address
+ lcdWriteCommand(0x40);//--set start line address
+ lcdWriteCommand(0x81);//--set contrast control register
+ lcdWriteCommand(0x7f);
+ lcdWriteCommand(0xa1);//--set segment re-map 0 to 127
+ lcdWriteCommand(0xa6);//--set normal display
+ lcdWriteCommand(0xa8);//--set multiplex ratio(1 to 64)
+ lcdWriteCommand(0x3F);//
+ lcdWriteCommand(0xa4);//0xa4,Output follows RAM content;0xa5,Output ignores RAM content
+ lcdWriteCommand(0xd3);//-set display offset
+ lcdWriteCommand(0x00);//-not offset
+ lcdWriteCommand(0xd5);//--set display clock divide ratio/oscillator frequency
+ lcdWriteCommand(0xf0);//--set divide ratio
+ lcdWriteCommand(0xd9);//--set pre-charge period
+ lcdWriteCommand(0x22); //
+ lcdWriteCommand(0xda);//--set com pins hardware configuration
+ lcdWriteCommand(0x12);
+ lcdWriteCommand(0xdb);//--set vcomh
+ lcdWriteCommand(0x20);//0x20,0.77xVcc
+ lcdWriteCommand(0x8d);//--set DC-DC enable
+ lcdWriteCommand(0x14);//
+ lcdWriteCommand(0xaf);//--turn on lcd panel
+}
+
+void SSD1306::clearscreen(void)
+{
+ int16_t x, Y;
+ for (Y=0;Y<LCD_Ymax/8;Y++)
+ {
+ lcdSetAddr(0, Y);
+ for (x=0;x<LCD_Xmax;x++)
+ lcdWriteData(0x00);
+ }
+}
+
+// print char function using Font5x7
+void SSD1306::printC_5x7 (int x, int y, unsigned char ascii_code)
+{
+ int8_t i;
+ if (x<(LCD_Xmax-5) && y<(LCD_Ymax-7)) {
+ if (ascii_code<0x20) ascii_code=0x20;
+ else if (ascii_code>0x7F) ascii_code=0x20;
+ for (i=0;i<5;i++) {
+ lcdSetAddr((x+i), (y/8));
+ lcdWriteData(Font5x7[(ascii_code-0x20)*5+i]);
+ }
+ }
+}
+
+void SSD1306::printC(int Line, int Col, unsigned char ascii_code)
+{
+ uint8_t j, i, tmp;
+ for (j=0;j<2;j++) {
+ lcdSetAddr(Col*8, Line*2+j);
+ for (i=0;i<8;i++) {
+ tmp=Font8x16[(ascii_code-0x20)*16+j*8+i];
+ lcdWriteData(tmp);
+ }
+ }
+}
+
+void SSD1306::printLine(int line, char text[])
+{
+ uint8_t Col;
+ for (Col=0; Col<strlen(text); Col++)
+ printC(line, Col, text[Col]);
+}
+
+void SSD1306::printS(int x, int y, char text[])
+{
+ int8_t i;
+ for (i=0;i<strlen(text);i++)
+ printC(x+i*8, y,text[i]);
+}
+
+void SSD1306::printS_5x7(int x, int y, char text[])
+{
+ int8_t i;
+ for (i=0;i<strlen(text);i++) {
+ printC_5x7(x,y,text[i]);
+ x=x+5;
+ }
+}
+
+void SSD1306::drawPixel(int x, int y, int fgColor, int bgColor)
+{
+ if (fgColor!=0)
+ DisplayBuffer[x+y/8*LCD_Xmax] |= (0x01<<(y%8));
+ else
+ DisplayBuffer[x+y/8*LCD_Xmax] &= (0xFE<<(y%8));
+
+ lcdSetAddr(x, y/8);
+ lcdWriteData(DisplayBuffer[x+y/8*LCD_Xmax]);
+}
+
+void SSD1306::drawBmp8x8(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,k, kx,ky;
+ if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check
+ for (i=0;i<8;i++){
+ kx=x+i;
+ t=bitmap[i];
+ for (k=0;k<8;k++) {
+ ky=y+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+}
+
+void SSD1306::drawBmp32x8(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,k, kx,ky;
+ if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check
+ for (i=0;i<32;i++){
+ kx=x+i;
+ t=bitmap[i];
+ for (k=0;k<8;k++) {
+ ky=y+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+}
+
+void SSD1306::drawBmp120x8(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,k, kx,ky;
+ if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check
+ for (i=0;i<120;i++){
+ kx=x+i;
+ t=bitmap[i];
+ for (k=0;k<8;k++) {
+ ky=y+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+}
+
+void SSD1306::drawBmp8x16(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,k, kx,ky;
+ if (x<(LCD_Xmax-7) && y<(LCD_Ymax-7)) // boundary check
+ for (i=0;i<8;i++){
+ kx=x+i;
+ t=bitmap[i];
+ for (k=0;k<8;k++) {
+ ky=y+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ t=bitmap[i+8];
+ for (k=0;k<8;k++) {
+ ky=y+k+8;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+}
+
+void SSD1306::drawBmp16x8(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,k,kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-7)) // boundary check
+ for (i=0;i<16;i++)
+ {
+ kx=x+i;
+ t=bitmap[i];
+ for (k=0;k<8;k++) {
+ ky=y+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+}
+
+void SSD1306::drawBmp16x16(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,j,k, kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-15)) // boundary check
+ for (j=0;j<2; j++){
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp16x24(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,j,k, kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-15)) // boundary check
+ for (j=0;j<3; j++){
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp16x32(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t, i,j,k, kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-31)) // boundary check
+ for (j=0;j<4; j++) {
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp16x40(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t, i,j,k, kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-31)) // boundary check
+ for (j=0;j<5; j++) {
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp16x48(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,j,k,kx,ky;
+ if (x<(LCD_Xmax-15) && y<(LCD_Ymax-47)) // boundary check
+ for (j=0;j<6; j++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp16x64(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,j,k,kx,ky;
+ if (x<(LCD_Xmax-15) && y==0) // boundary check
+ for (j=0;j<8; j++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+i;
+ t=bitmap[i+j*16];
+ for (k=0;k<8;k++) {
+ ky=y+j*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp32x16(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,jx,jy,k,kx,ky;
+ if (x<(LCD_Xmax-31) && y<(LCD_Ymax-15)) // boundary check
+ for (jy=0;jy<2;jy++)
+ for (jx=0;jx<2;jx++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+jx*16+i;
+ t=bitmap[i+jx*16+jy*32];
+ for (k=0;k<8;k++) {
+ ky=y+jy*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp32x32(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,jx,jy,k, kx,ky;
+ if (x<(LCD_Xmax-31) && y<(LCD_Ymax-31)) // boundary check
+ for (jy=0;jy<4;jy++)
+ for (jx=0;jx<2;jx++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+jx*16+i;
+ t=bitmap[i+jx*16+jy*32];
+ for (k=0;k<8;k++) {
+ ky=y+jy*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp32x48(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,jx,jy,k, kx,ky;
+ if (x<(LCD_Xmax-31) && y<(LCD_Ymax-47)) // boundary check
+ for (jy=0;jy<6;jy++)
+ for (jx=0;jx<2;jx++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+jx*16+i;
+ t=bitmap[i+jx*16+jy*32];
+ for (k=0;k<8;k++) {
+ ky=y+jy*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp32x64(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t,i,jx,jy,k, kx,ky;
+ if (x<(LCD_Xmax-31) && y==0) // boundary check
+ for (jy=0;jy<8;jy++)
+ for (jx=0;jx<2;jx++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+jx*16+i;
+ t=bitmap[i+jx*16+jy*32];
+ for (k=0;k<8;k++) {
+ ky=y+jy*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBmp64x64(int x, int y, int fgColor, int bgColor, unsigned char bitmap[])
+{
+ uint8_t t, i,jx,jy,k, kx,ky;
+ if (x<(LCD_Xmax-63) && y==0) // boundary check
+ for (jy=0;jy<8;jy++)
+ for (jx=0;jx<4;jx++) {
+ k=x;
+ for (i=0;i<16;i++) {
+ kx=x+jx*16+i;
+ t=bitmap[i+jx*16+jy*64];
+ for (k=0;k<8;k++) {
+ ky=y+jy*8+k;
+ if (t&(0x01<<k)) drawPixel(kx,ky,fgColor,bgColor);
+ }
+ }
+ }
+}
+
+void SSD1306::drawBMP(unsigned char *buffer)
+{
+ uint8_t x,y;
+ for (x=0; x<LCD_Xmax; x++) {
+ for (y=0; y<(LCD_Ymax/8); y++) {
+ lcdSetAddr(x ,y);
+ lcdWriteData(buffer[x+y*LCD_Xmax]);
+ }
+ }
+}
+