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esphome/esphome/components/ssd1325_base/ssd1325_base.cpp

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#include "ssd1325_base.h"
#include "esphome/core/log.h"
#include "esphome/core/helpers.h"
namespace esphome {
namespace ssd1325_base {
static const char *const TAG = "ssd1325";
static const uint8_t SSD1325_MAX_CONTRAST = 127;
static const uint8_t SSD1325_COLORMASK = 0x0f;
static const uint8_t SSD1325_COLORSHIFT = 4;
static const uint8_t SSD1325_PIXELSPERBYTE = 2;
static const uint8_t SSD1325_SETCOLADDR = 0x15;
static const uint8_t SSD1325_SETROWADDR = 0x75;
static const uint8_t SSD1325_SETCONTRAST = 0x81;
static const uint8_t SSD1325_SETCURRENT = 0x84;
static const uint8_t SSD1325_SETREMAP = 0xA0;
static const uint8_t SSD1325_SETSTARTLINE = 0xA1;
static const uint8_t SSD1325_SETOFFSET = 0xA2;
static const uint8_t SSD1325_NORMALDISPLAY = 0xA4;
static const uint8_t SSD1325_DISPLAYALLON = 0xA5;
static const uint8_t SSD1325_DISPLAYALLOFF = 0xA6;
static const uint8_t SSD1325_INVERTDISPLAY = 0xA7;
static const uint8_t SSD1325_SETMULTIPLEX = 0xA8;
static const uint8_t SSD1325_MASTERCONFIG = 0xAD;
static const uint8_t SSD1325_DISPLAYOFF = 0xAE;
static const uint8_t SSD1325_DISPLAYON = 0xAF;
static const uint8_t SSD1325_SETPRECHARGECOMPENABLE = 0xB0;
static const uint8_t SSD1325_SETPHASELEN = 0xB1;
static const uint8_t SSD1325_SETROWPERIOD = 0xB2;
static const uint8_t SSD1325_SETCLOCK = 0xB3;
static const uint8_t SSD1325_SETPRECHARGECOMP = 0xB4;
static const uint8_t SSD1325_SETGRAYTABLE = 0xB8;
static const uint8_t SSD1325_SETDEFAULTGRAYTABLE = 0xB9;
static const uint8_t SSD1325_SETPRECHARGEVOLTAGE = 0xBC;
static const uint8_t SSD1325_SETVCOMLEVEL = 0xBE;
static const uint8_t SSD1325_SETVSL = 0xBF;
static const uint8_t SSD1325_GFXACCEL = 0x23;
static const uint8_t SSD1325_DRAWRECT = 0x24;
static const uint8_t SSD1325_COPY = 0x25;
void SSD1325::setup() {
this->init_internal_(this->get_buffer_length_());
this->command(SSD1325_DISPLAYOFF); // display off
this->command(SSD1325_SETCLOCK); // set osc division
this->command(0xF1); // 145
this->command(SSD1325_SETMULTIPLEX); // multiplex ratio
if (this->model_ == SSD1327_MODEL_128_128) {
this->command(0x7f); // duty = height - 1
} else {
this->command(0x3f); // duty = 1/64
}
this->command(SSD1325_SETOFFSET); // set display offset
if (this->model_ == SSD1327_MODEL_128_128) {
this->command(0x00); // 0
} else {
this->command(0x4C); // 76
}
this->command(SSD1325_SETSTARTLINE); // set start line
this->command(0x00); // ...
this->command(SSD1325_MASTERCONFIG); // Set Master Config DC/DC Converter
this->command(0x02);
this->command(SSD1325_SETREMAP); // set segment remapping
if (this->model_ == SSD1327_MODEL_128_128) {
this->command(0x53); // COM bottom-up, split odd/even, enable column and nibble remapping
} else {
this->command(0x50); // COM bottom-up, split odd/even
}
this->command(SSD1325_SETCURRENT + 0x2); // Set Full Current Range
this->command(SSD1325_SETGRAYTABLE);
// gamma ~2.2
if (this->model_ == SSD1327_MODEL_128_128) {
this->command(0);
this->command(1);
this->command(2);
this->command(3);
this->command(6);
this->command(8);
this->command(12);
this->command(16);
this->command(20);
this->command(26);
this->command(32);
this->command(39);
this->command(46);
this->command(54);
this->command(63);
} else {
this->command(0x01);
this->command(0x11);
this->command(0x22);
this->command(0x32);
this->command(0x43);
this->command(0x54);
this->command(0x65);
this->command(0x76);
}
this->command(SSD1325_SETROWPERIOD);
this->command(0x51);
this->command(SSD1325_SETPHASELEN);
this->command(0x55);
this->command(SSD1325_SETPRECHARGECOMP);
this->command(0x02);
this->command(SSD1325_SETPRECHARGECOMPENABLE);
this->command(0x28);
this->command(SSD1325_SETVCOMLEVEL); // Set High Voltage Level of COM Pin
this->command(0x1C);
this->command(SSD1325_SETVSL); // set Low Voltage Level of SEG Pin
this->command(0x0D | 0x02);
this->command(SSD1325_NORMALDISPLAY); // set display mode
set_brightness(this->brightness_);
this->fill(Color::BLACK); // clear display - ensures we do not see garbage at power-on
this->display(); // ...write buffer, which actually clears the display's memory
this->turn_on(); // display ON
}
void SSD1325::display() {
this->command(SSD1325_SETCOLADDR); // set column address
this->command(0x00); // set column start address
this->command(0x3F); // set column end address
this->command(SSD1325_SETROWADDR); // set row address
this->command(0x00); // set row start address
if (this->model_ == SSD1327_MODEL_128_128) {
this->command(127); // set last row
} else {
this->command(63); // set last row
}
this->write_display_data();
}
void SSD1325::update() {
this->do_update_();
this->display();
}
void SSD1325::set_brightness(float brightness) {
// validation
if (brightness > 1) {
this->brightness_ = 1.0;
} else if (brightness < 0) {
this->brightness_ = 0;
} else {
this->brightness_ = brightness;
}
// now write the new brightness level to the display
this->command(SSD1325_SETCONTRAST);
this->command(int(SSD1325_MAX_CONTRAST * (this->brightness_)));
}
bool SSD1325::is_on() { return this->is_on_; }
void SSD1325::turn_on() {
this->command(SSD1325_DISPLAYON);
this->is_on_ = true;
}
void SSD1325::turn_off() {
this->command(SSD1325_DISPLAYOFF);
this->is_on_ = false;
}
int SSD1325::get_height_internal() {
switch (this->model_) {
case SSD1325_MODEL_128_32:
return 32;
case SSD1325_MODEL_128_64:
return 64;
case SSD1325_MODEL_96_16:
return 16;
case SSD1325_MODEL_64_48:
return 48;
case SSD1327_MODEL_128_128:
return 128;
default:
return 0;
}
}
int SSD1325::get_width_internal() {
switch (this->model_) {
case SSD1325_MODEL_128_32:
case SSD1325_MODEL_128_64:
case SSD1327_MODEL_128_128:
return 128;
case SSD1325_MODEL_96_16:
return 96;
case SSD1325_MODEL_64_48:
return 64;
default:
return 0;
}
}
size_t SSD1325::get_buffer_length_() {
return size_t(this->get_width_internal()) * size_t(this->get_height_internal()) / SSD1325_PIXELSPERBYTE;
}
void HOT SSD1325::draw_absolute_pixel_internal(int x, int y, Color color) {
if (x >= this->get_width_internal() || x < 0 || y >= this->get_height_internal() || y < 0)
return;
uint32_t color4 = display::ColorUtil::color_to_grayscale4(color);
// where should the bits go in the big buffer array? math...
uint16_t pos = (x / SSD1325_PIXELSPERBYTE) + (y * this->get_width_internal() / SSD1325_PIXELSPERBYTE);
uint8_t shift = (x % SSD1325_PIXELSPERBYTE) * SSD1325_COLORSHIFT;
// ensure 'color4' is valid (only 4 bits aka 1 nibble) and shift the bits left when necessary
color4 = (color4 & SSD1325_COLORMASK) << shift;
// first mask off the nibble we must change...
this->buffer_[pos] &= (~SSD1325_COLORMASK >> shift);
// ...then lay the new nibble back on top. done!
this->buffer_[pos] |= color4;
}
void SSD1325::fill(Color color) {
const uint32_t color4 = display::ColorUtil::color_to_grayscale4(color);
uint8_t fill = (color4 & SSD1325_COLORMASK) | ((color4 & SSD1325_COLORMASK) << SSD1325_COLORSHIFT);
for (uint32_t i = 0; i < this->get_buffer_length_(); i++)
this->buffer_[i] = fill;
}
void SSD1325::init_reset_() {
if (this->reset_pin_ != nullptr) {
this->reset_pin_->setup();
this->reset_pin_->digital_write(true);
delay(1);
// Trigger Reset
this->reset_pin_->digital_write(false);
delay(10);
// Wake up
this->reset_pin_->digital_write(true);
}
}
const char *SSD1325::model_str_() {
switch (this->model_) {
case SSD1325_MODEL_128_32:
return "SSD1325 128x32";
case SSD1325_MODEL_128_64:
return "SSD1325 128x64";
case SSD1325_MODEL_96_16:
return "SSD1325 96x16";
case SSD1325_MODEL_64_48:
return "SSD1325 64x48";
case SSD1327_MODEL_128_128:
return "SSD1327 128x128";
default:
return "Unknown";
}
}
} // namespace ssd1325_base
} // namespace esphome
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