mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 11:44:13 +01:00
204 lines
7.1 KiB
C++
204 lines
7.1 KiB
C++
#include "ssd1322_base.h"
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#include "esphome/core/log.h"
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#include "esphome/core/helpers.h"
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namespace esphome {
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namespace ssd1322_base {
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static const char *const TAG = "ssd1322";
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static const uint8_t SSD1322_MAX_CONTRAST = 255;
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static const uint8_t SSD1322_COLORMASK = 0x0f;
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static const uint8_t SSD1322_COLORSHIFT = 4;
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static const uint8_t SSD1322_PIXELSPERBYTE = 2;
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static const uint8_t SSD1322_ENABLEGRAYSCALETABLE = 0x00;
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static const uint8_t SSD1322_SETCOLUMNADDRESS = 0x15;
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static const uint8_t SSD1322_WRITERAM = 0x5C;
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static const uint8_t SSD1322_READRAM = 0x5D;
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static const uint8_t SSD1322_SETROWADDRESS = 0x75;
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static const uint8_t SSD1322_SETREMAP = 0xA0;
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static const uint8_t SSD1322_SETSTARTLINE = 0xA1;
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static const uint8_t SSD1322_SETOFFSET = 0xA2;
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static const uint8_t SSD1322_SETMODEALLOFF = 0xA4;
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static const uint8_t SSD1322_SETMODEALLON = 0xA5;
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static const uint8_t SSD1322_SETMODENORMAL = 0xA6;
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static const uint8_t SSD1322_SETMODEINVERTED = 0xA7;
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static const uint8_t SSD1322_ENABLEPARTIALDISPLAY = 0xA8;
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static const uint8_t SSD1322_EXITPARTIALDISPLAY = 0xA9;
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static const uint8_t SSD1322_SETFUNCTIONSELECTION = 0xAB;
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static const uint8_t SSD1322_SETDISPLAYOFF = 0xAE;
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static const uint8_t SSD1322_SETDISPLAYON = 0xAF;
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static const uint8_t SSD1322_SETPHASELENGTH = 0xB1;
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static const uint8_t SSD1322_SETFRONTCLOCKDIVIDER = 0xB3;
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static const uint8_t SSD1322_DISPLAYENHANCEMENTA = 0xB4;
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static const uint8_t SSD1322_SETGPIO = 0xB5;
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static const uint8_t SSD1322_SETSECONDPRECHARGEPERIOD = 0xB6;
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static const uint8_t SSD1322_SETGRAYSCALETABLE = 0xB8;
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static const uint8_t SSD1322_SELECTDEFAULTLINEARGRAYSCALETABLE = 0xB9;
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static const uint8_t SSD1322_SETPRECHARGEVOLTAGE = 0xBB;
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static const uint8_t SSD1322_SETVCOMHVOLTAGE = 0xBE;
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static const uint8_t SSD1322_SETCONTRAST = 0xC1;
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static const uint8_t SSD1322_MASTERCURRENTCONTROL = 0xC7;
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static const uint8_t SSD1322_SETMULTIPLEXRATIO = 0xCA;
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static const uint8_t SSD1322_DISPLAYENHANCEMENTB = 0xD1;
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static const uint8_t SSD1322_SETCOMMANDLOCK = 0xFD;
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static const uint8_t SSD1322_SETCOMMANDLOCK_UNLOCK = 0x12;
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static const uint8_t SSD1322_SETCOMMANDLOCK_LOCK = 0x16;
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void SSD1322::setup() {
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this->init_internal_(this->get_buffer_length_());
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this->command(SSD1322_SETCOMMANDLOCK);
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this->data(SSD1322_SETCOMMANDLOCK_UNLOCK);
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this->turn_off();
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this->command(SSD1322_SETFRONTCLOCKDIVIDER);
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this->data(0x91);
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this->command(SSD1322_SETMULTIPLEXRATIO);
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this->data(0x3F);
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this->command(SSD1322_SETOFFSET);
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this->data(0x00);
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this->command(SSD1322_SETSTARTLINE);
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this->data(0x00);
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this->command(SSD1322_SETREMAP);
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this->data(0x14);
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this->data(0x11);
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this->command(SSD1322_SETGPIO);
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this->data(0x00);
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this->command(SSD1322_SETFUNCTIONSELECTION);
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this->data(0x01);
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this->command(SSD1322_DISPLAYENHANCEMENTA);
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this->data(0xA0);
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this->data(0xFD);
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this->command(SSD1322_MASTERCURRENTCONTROL);
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this->data(0x0F);
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this->command(SSD1322_SETPHASELENGTH);
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this->data(0xE2);
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this->command(SSD1322_DISPLAYENHANCEMENTB);
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this->data(0x82);
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this->data(0x20);
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this->command(SSD1322_SETPRECHARGEVOLTAGE);
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this->data(0x1F);
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this->command(SSD1322_SETSECONDPRECHARGEPERIOD);
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this->data(0x08);
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this->command(SSD1322_SETVCOMHVOLTAGE);
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this->data(0x07);
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this->command(SSD1322_SETMODENORMAL);
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this->command(SSD1322_EXITPARTIALDISPLAY);
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// this->command(SSD1322_SELECTDEFAULTLINEARGRAYSCALETABLE);
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this->command(SSD1322_SETGRAYSCALETABLE);
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// gamma ~2.2
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this->data(24);
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this->data(29);
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this->data(36);
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this->data(43);
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this->data(51);
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this->data(60);
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this->data(70);
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this->data(81);
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this->data(93);
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this->data(105);
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this->data(118);
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this->data(132);
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this->data(147);
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this->data(163);
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this->data(180);
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this->command(SSD1322_ENABLEGRAYSCALETABLE);
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set_brightness(this->brightness_);
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this->fill(Color::BLACK); // clear display - ensures we do not see garbage at power-on
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this->display(); // ...write buffer, which actually clears the display's memory
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this->turn_on(); // display ON
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}
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void SSD1322::display() {
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this->command(SSD1322_SETCOLUMNADDRESS); // set column address
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this->data(0x1C); // set column start address
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this->data(0x5B); // set column end address
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this->command(SSD1322_SETROWADDRESS); // set row address
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this->data(0x00); // set row start address
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this->data(0x3F); // set last row
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this->command(SSD1322_WRITERAM); // write
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this->write_display_data();
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}
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void SSD1322::update() {
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this->do_update_();
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this->display();
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}
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void SSD1322::set_brightness(float brightness) {
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this->brightness_ = clamp(brightness, 0.0F, 1.0F);
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// now write the new brightness level to the display
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this->command(SSD1322_SETCONTRAST);
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this->data(int(SSD1322_MAX_CONTRAST * (this->brightness_)));
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}
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bool SSD1322::is_on() { return this->is_on_; }
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void SSD1322::turn_on() {
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this->command(SSD1322_SETDISPLAYON);
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this->is_on_ = true;
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}
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void SSD1322::turn_off() {
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this->command(SSD1322_SETDISPLAYOFF);
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this->is_on_ = false;
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}
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int SSD1322::get_height_internal() {
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switch (this->model_) {
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case SSD1322_MODEL_256_64:
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return 64;
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default:
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return 0;
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}
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}
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int SSD1322::get_width_internal() {
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switch (this->model_) {
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case SSD1322_MODEL_256_64:
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return 256;
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default:
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return 0;
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}
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}
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size_t SSD1322::get_buffer_length_() {
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return size_t(this->get_width_internal()) * size_t(this->get_height_internal()) / SSD1322_PIXELSPERBYTE;
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}
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void HOT SSD1322::draw_absolute_pixel_internal(int x, int y, Color color) {
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if (x >= this->get_width_internal() || x < 0 || y >= this->get_height_internal() || y < 0)
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return;
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uint32_t color4 = display::ColorUtil::color_to_grayscale4(color);
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// where should the bits go in the big buffer array? math...
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uint16_t pos = (x / SSD1322_PIXELSPERBYTE) + (y * this->get_width_internal() / SSD1322_PIXELSPERBYTE);
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uint8_t shift = (1u - (x % SSD1322_PIXELSPERBYTE)) * SSD1322_COLORSHIFT;
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// ensure 'color4' is valid (only 4 bits aka 1 nibble) and shift the bits left when necessary
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color4 = (color4 & SSD1322_COLORMASK) << shift;
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// first mask off the nibble we must change...
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this->buffer_[pos] &= (~SSD1322_COLORMASK >> shift);
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// ...then lay the new nibble back on top. done!
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this->buffer_[pos] |= color4;
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}
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void SSD1322::fill(Color color) {
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const uint32_t color4 = display::ColorUtil::color_to_grayscale4(color);
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uint8_t fill = (color4 & SSD1322_COLORMASK) | ((color4 & SSD1322_COLORMASK) << SSD1322_COLORSHIFT);
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for (uint32_t i = 0; i < this->get_buffer_length_(); i++)
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this->buffer_[i] = fill;
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}
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void SSD1322::init_reset_() {
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if (this->reset_pin_ != nullptr) {
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this->reset_pin_->setup();
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this->reset_pin_->digital_write(true);
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delay(1);
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// Trigger Reset
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this->reset_pin_->digital_write(false);
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delay(10);
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// Wake up
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this->reset_pin_->digital_write(true);
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}
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}
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const char *SSD1322::model_str_() {
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switch (this->model_) {
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case SSD1322_MODEL_256_64:
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return "SSD1322 256x64";
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default:
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return "Unknown";
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}
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}
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} // namespace ssd1322_base
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} // namespace esphome
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