void ArduiPi_OLED::begin( void )
{
uint8_t multiplex;
uint8_t chargepump;
uint8_t compins;
uint8_t contrast;
uint8_t precharge;
constructor(oled_width, oled_height);
// Setup reset pin direction (used by both SPI and I2C)
if (rst >= 0)
{
bcm2835_gpio_fsel(rst, BCM2835_GPIO_FSEL_OUTP);
bcm2835_gpio_write(rst, HIGH);
// VDD (3.3V) goes high at start, lets just chill for a ms
usleep(1000);
// bring reset low
bcm2835_gpio_write(rst, LOW);
// wait 10ms
usleep(10000);
// bring out of reset
bcm2835_gpio_write(rst, HIGH);
}
// depends on OLED type configuration
if (oled_height == 32)
{
multiplex = 0x1F;
compins = 0x02;
contrast = 0x8F;
}
else
{
#ifdef SEEED_I2C
if (oled_type == OLED_SEEED_I2C_96x96 )
{
multiplex = 0x5F;
compins = 0x12;
contrast = 0x53;
}
else
// So 128x64
#endif
{
multiplex = 0x3F;
compins = 0x12;
if (oled_type == OLED_SH1106_I2C_128x64)
contrast = 0x80;
else
contrast = (vcc_type==SSD_External_Vcc?0x9F:0xCF);
}
}
if (vcc_type == SSD_External_Vcc)
{
chargepump = 0x10;
precharge = 0x22;
}
else
{
chargepump = 0x14;
precharge = 0xF1;
}
#ifdef SEEED_I2C
if (oled_type == OLED_SEEED_I2C_96x96 )
sendCommand(SSD1327_Set_Command_Lock, 0x12); // Unlock OLED driver IC MCU interface from entering command. i.e: Accept commands
#endif
sendCommand(SSD_Display_Off);
sendCommand(SSD_Set_Muliplex_Ratio, multiplex);
#ifdef SEEED_I2C
if (oled_type == OLED_SEEED_I2C_96x96 )
{
sendCommand(SSD1327_Set_Display_Clock_Div, 0x01);
sendCommand(SSD1327_Set_Display_Start_Line , 0 );
sendCommand(SSD1327_Set_Display_Offset, 96 );
sendCommand(SSD_Set_Segment_Remap , 0x46);
sendCommand(0xAB); // set vdd internal
sendCommand(0x01); //
sendCommand(0xB1); // Set Phase Length
sendCommand(0X51); //
sendCommand(0xB9); //
sendCommand(0xBC); // set pre_charge voltage/VCOMH
sendCommand(0x08); // (0x08);
sendCommand(0xBE); // set VCOMH
sendCommand(0X07); // (0x07);
sendCommand(0xB6); // Set second pre-charge period
sendCommand(0x01); //
sendCommand(0xD5); // enable second precharge and enternal vsl
sendCommand(0X62); // (0x62);
// Set Normal Display Mode
sendCommand(SSD1327_Normal_Display);
// Row Address
// Start 0 End 95
sendCommand(SSD1327_Set_Row_Address, 0, 95);
// Column Address
// Start from 8th Column of driver IC. This is 0th Column for OLED
// End at (8 + 47)th column. Each Column has 2 pixels(segments)
sendCommand(SSD1327_Set_Column_Address, 8, 0x37 );
// Map to horizontal mode
sendCommand(0xA0); // remap to
sendCommand(0x46); // Vertical mode
// Init gray level for text. Default:Brightest White
grayH= 0xF0;
grayL= 0x0F;
}
else
#endif // SEEED
if (oled_type == OLED_SH1106_I2C_128x64)
{
sendCommand(SSD1306_Set_Lower_Column_Start_Address|0x02); /*set lower column address*/
sendCommand(SSD1306_Set_Higher_Column_Start_Address); /*set higher column address*/
sendCommand(SSD1306_Set_Start_Line); /*set display start line*/
sendCommand(SH1106_Set_Page_Address); /*set page address*/
sendCommand(SSD_Set_Segment_Remap|0x01); /*set segment remap*/
sendCommand(SSD1306_Normal_Display); /*normal / reverse*/
sendCommand(0xad); /*set charge pump enable*/
sendCommand(0x8b); /*external VCC */
sendCommand(0x30); /*0X30---0X33 set VPP 9V liangdu!!!!*/
sendCommand(SSD1306_Set_Com_Output_Scan_Direction_Remap); /*Com scan direction*/
sendCommand(SSD1306_Set_Display_Offset); /*set display offset*/
sendCommand(0x00); /* 0x20 */
sendCommand(SSD1306_Set_Display_Clock_Div); /*set osc division*/
sendCommand(0x80);
sendCommand(SSD1306_Set_Precharge_Period); /*set pre-charge period*/
sendCommand(0x1f); /*0x22*/
sendCommand(SSD1306_Set_Com_Pins); /*set COM pins*/
sendCommand(0x12);
sendCommand(SSD1306_Set_Vcomh_Deselect_Level); /*set vcomh*/
sendCommand(0x40);
}
else
{
sendCommand(SSD1306_Charge_Pump_Setting, chargepump);
sendCommand(SSD1306_Set_Memory_Mode, 0x00); // 0x20 0x0 act like ks0108
sendCommand(SSD1306_Set_Display_Clock_Div, 0x80); // 0xD5 + the suggested ratio 0x80
sendCommand(SSD1306_Set_Display_Offset, 0x00); // no offset
sendCommand(SSD1306_Set_Start_Line | 0x0); // line #0
// use this two commands to flip display
sendCommand(SSD_Set_Segment_Remap | 0x1);
sendCommand(SSD1306_Set_Com_Output_Scan_Direction_Remap);
sendCommand(SSD1306_Set_Com_Pins, compins);
sendCommand(SSD1306_Set_Precharge_Period, precharge);
sendCommand(SSD1306_Set_Vcomh_Deselect_Level, 0x40); // 0x40 -> unknown value in datasheet
sendCommand(SSD1306_Entire_Display_Resume);
sendCommand(SSD1306_Normal_Display); // 0xA6
// Reset to default value in case of
// no reset pin available on OLED,
sendCommand( SSD_Set_Column_Address, 0, 127 );
sendCommand( SSD_Set_Page_Address, 0, 7 );
}
sendCommand(SSD_Set_ContrastLevel, contrast);
stopscroll();
// Empty uninitialized buffer
clearDisplay();
// turn on oled panel
sendCommand(SSD_Display_On);
// wait 100ms
usleep(100000);
}
void Adafruit_SSD1306::begin(uint8_t vccstate, uint8_t i2caddr, bool reset) {
_vccstate = vccstate;
_i2caddr = i2caddr;
// set pin directions
if (sid != -1){
pinMode(dc, OUTPUT);
pinMode(cs, OUTPUT);
csport = portOutputRegister(digitalPinToPort(cs));
cspinmask = digitalPinToBitMask(cs);
dcport = portOutputRegister(digitalPinToPort(dc));
dcpinmask = digitalPinToBitMask(dc);
if (!hwSPI){
// set pins for software-SPI
pinMode(sid, OUTPUT);
pinMode(sclk, OUTPUT);
clkport = portOutputRegister(digitalPinToPort(sclk));
clkpinmask = digitalPinToBitMask(sclk);
mosiport = portOutputRegister(digitalPinToPort(sid));
mosipinmask = digitalPinToBitMask(sid);
}
if (hwSPI){
SPI.begin ();
#ifdef __SAM3X8E__
SPI.setClockDivider (9); // 9.3 MHz
#else
SPI.setClockDivider (SPI_CLOCK_DIV2); // 8 MHz
#endif
}
}
else
{
// I2C Init
Wire.begin();
#ifdef __SAM3X8E__
// Force 400 KHz I2C, rawr! (Uses pins 20, 21 for SDA, SCL)
TWI1->TWI_CWGR = 0;
TWI1->TWI_CWGR = ((VARIANT_MCK / (2 * 400000)) - 4) * 0x101;
#endif
}
if (reset && rst != -1) {
// Setup reset pin direction (used by both SPI and I2C)
pinMode(rst, OUTPUT);
digitalWrite(rst, HIGH);
// VDD (3.3V) goes high at start, lets just chill for a ms
delay(1);
// bring reset low
digitalWrite(rst, LOW);
// wait 10ms
delay(10);
// bring out of reset
digitalWrite(rst, HIGH);
// turn on VCC (9V?)
}
#if defined SSD1306_128_32
// Init sequence for 128x32 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x1F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x0); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x02);
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
ssd1306_command(0x8F);
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
#if defined SSD1306_128_64
// Init sequence for 128x64 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x3F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x0); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x12);
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x9F); }
else
{ ssd1306_command(0xCF); }
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
#if defined SSD1306_96_16
// Init sequence for 96x16 OLED module
ssd1306_command(SSD1306_DISPLAYOFF); // 0xAE
ssd1306_command(SSD1306_SETDISPLAYCLOCKDIV); // 0xD5
ssd1306_command(0x80); // the suggested ratio 0x80
ssd1306_command(SSD1306_SETMULTIPLEX); // 0xA8
ssd1306_command(0x0F);
ssd1306_command(SSD1306_SETDISPLAYOFFSET); // 0xD3
ssd1306_command(0x00); // no offset
ssd1306_command(SSD1306_SETSTARTLINE | 0x0); // line #0
ssd1306_command(SSD1306_CHARGEPUMP); // 0x8D
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0x14); }
ssd1306_command(SSD1306_MEMORYMODE); // 0x20
ssd1306_command(0x00); // 0x0 act like ks0108
ssd1306_command(SSD1306_SEGREMAP | 0x1);
ssd1306_command(SSD1306_COMSCANDEC);
ssd1306_command(SSD1306_SETCOMPINS); // 0xDA
ssd1306_command(0x2); //ada x12
ssd1306_command(SSD1306_SETCONTRAST); // 0x81
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x10); }
else
{ ssd1306_command(0xAF); }
ssd1306_command(SSD1306_SETPRECHARGE); // 0xd9
if (vccstate == SSD1306_EXTERNALVCC)
{ ssd1306_command(0x22); }
else
{ ssd1306_command(0xF1); }
ssd1306_command(SSD1306_SETVCOMDETECT); // 0xDB
ssd1306_command(0x40);
ssd1306_command(SSD1306_DISPLAYALLON_RESUME); // 0xA4
ssd1306_command(SSD1306_NORMALDISPLAY); // 0xA6
#endif
if (reset && rst == -1) {
ssd1306_command( 0x21, 0, 127 );
ssd1306_command( 0x22, 0, 7 );
stopscroll();
}
ssd1306_command(SSD1306_DISPLAYON);//--turn on oled panel
}
