mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 11:44:13 +01:00
154 lines
6.7 KiB
C++
154 lines
6.7 KiB
C++
#include "ssd1331_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 ssd1331_base {
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static const char *const TAG = "ssd1331";
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static const uint16_t SSD1331_COLORMASK = 0xffff;
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static const uint8_t SSD1331_MAX_CONTRASTA = 0x91;
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static const uint8_t SSD1331_MAX_CONTRASTB = 0x50;
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static const uint8_t SSD1331_MAX_CONTRASTC = 0x7D;
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static const uint8_t SSD1331_BYTESPERPIXEL = 2;
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// SSD1331 Commands
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static const uint8_t SSD1331_DRAWLINE = 0x21; // Draw line
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static const uint8_t SSD1331_DRAWRECT = 0x22; // Draw rectangle
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static const uint8_t SSD1331_FILL = 0x26; // Fill enable/disable
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static const uint8_t SSD1331_SETCOLUMN = 0x15; // Set column address
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static const uint8_t SSD1331_SETROW = 0x75; // Set row address
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static const uint8_t SSD1331_CONTRASTA = 0x81; // Set contrast for color A
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static const uint8_t SSD1331_CONTRASTB = 0x82; // Set contrast for color B
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static const uint8_t SSD1331_CONTRASTC = 0x83; // Set contrast for color C
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static const uint8_t SSD1331_MASTERCURRENT = 0x87; // Master current control
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static const uint8_t SSD1331_SETREMAP = 0xA0; // Set re-map & data format
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static const uint8_t SSD1331_STARTLINE = 0xA1; // Set display start line
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static const uint8_t SSD1331_DISPLAYOFFSET = 0xA2; // Set display offset
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static const uint8_t SSD1331_NORMALDISPLAY = 0xA4; // Set display to normal mode
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static const uint8_t SSD1331_DISPLAYALLON = 0xA5; // Set entire display ON
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static const uint8_t SSD1331_DISPLAYALLOFF = 0xA6; // Set entire display OFF
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static const uint8_t SSD1331_INVERTDISPLAY = 0xA7; // Invert display
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static const uint8_t SSD1331_SETMULTIPLEX = 0xA8; // Set multiplex ratio
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static const uint8_t SSD1331_SETMASTER = 0xAD; // Set master configuration
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static const uint8_t SSD1331_DISPLAYOFF = 0xAE; // Display OFF (sleep mode)
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static const uint8_t SSD1331_DISPLAYON = 0xAF; // Normal Brightness Display ON
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static const uint8_t SSD1331_POWERMODE = 0xB0; // Power save mode
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static const uint8_t SSD1331_PRECHARGE = 0xB1; // Phase 1 and 2 period adjustment
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static const uint8_t SSD1331_CLOCKDIV = 0xB3; // Set display clock divide ratio/oscillator frequency
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static const uint8_t SSD1331_PRECHARGEA = 0x8A; // Set second pre-charge speed for color A
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static const uint8_t SSD1331_PRECHARGEB = 0x8B; // Set second pre-charge speed for color B
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static const uint8_t SSD1331_PRECHARGEC = 0x8C; // Set second pre-charge speed for color C
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static const uint8_t SSD1331_PRECHARGELEVEL = 0xBB; // Set pre-charge voltage
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static const uint8_t SSD1331_VCOMH = 0xBE; // Set Vcomh voltge
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void SSD1331::setup() {
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this->init_internal_(this->get_buffer_length_());
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this->command(SSD1331_DISPLAYOFF); // 0xAE
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this->command(SSD1331_SETREMAP); // 0xA0
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this->command(0x72); // RGB Color
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this->command(SSD1331_STARTLINE); // 0xA1
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this->command(0x0);
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this->command(SSD1331_DISPLAYOFFSET); // 0xA2
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this->command(0x0);
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this->command(SSD1331_NORMALDISPLAY); // 0xA4
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this->command(SSD1331_SETMULTIPLEX); // 0xA8
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this->command(0x3F); // 0x3F 1/64 duty
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this->command(SSD1331_SETMASTER); // 0xAD
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this->command(0x8E);
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this->command(SSD1331_POWERMODE); // 0xB0
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this->command(0x0B);
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this->command(SSD1331_PRECHARGE); // 0xB1
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this->command(0x31);
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this->command(SSD1331_CLOCKDIV); // 0xB3
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this->command(0xF0); // 7:4 = Oscillator Frequency, 3:0 = CLK Div Ratio, (A[3:0]+1 = 1..16)
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this->command(SSD1331_PRECHARGEA); // 0x8A
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this->command(0x64);
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this->command(SSD1331_PRECHARGEB); // 0x8B
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this->command(0x78);
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this->command(SSD1331_PRECHARGEC); // 0x8C
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this->command(0x64);
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this->command(SSD1331_PRECHARGELEVEL); // 0xBB
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this->command(0x3A);
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this->command(SSD1331_VCOMH); // 0xBE
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this->command(0x3E);
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this->command(SSD1331_MASTERCURRENT); // 0x87
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this->command(0x06);
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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 SSD1331::display() {
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this->command(SSD1331_SETCOLUMN); // set column address
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this->command(0x00); // set column start address
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this->command(0x5F); // set column end address
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this->command(SSD1331_SETROW); // set row address
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this->command(0x00); // set row start address
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this->command(0x3F); // set last row
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this->write_display_data();
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}
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void SSD1331::update() {
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this->do_update_();
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this->display();
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}
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void SSD1331::set_brightness(float brightness) {
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// validation
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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(SSD1331_CONTRASTA); // 0x81
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this->command(int(SSD1331_MAX_CONTRASTA * (this->brightness_)));
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this->command(SSD1331_CONTRASTB); // 0x82
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this->command(int(SSD1331_MAX_CONTRASTB * (this->brightness_)));
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this->command(SSD1331_CONTRASTC); // 0x83
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this->command(int(SSD1331_MAX_CONTRASTC * (this->brightness_)));
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}
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bool SSD1331::is_on() { return this->is_on_; }
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void SSD1331::turn_on() {
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this->command(SSD1331_DISPLAYON);
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this->is_on_ = true;
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}
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void SSD1331::turn_off() {
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this->command(SSD1331_DISPLAYOFF);
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this->is_on_ = false;
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}
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int SSD1331::get_height_internal() { return 64; }
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int SSD1331::get_width_internal() { return 96; }
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size_t SSD1331::get_buffer_length_() {
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return size_t(this->get_width_internal()) * size_t(this->get_height_internal()) * size_t(SSD1331_BYTESPERPIXEL);
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}
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void HOT SSD1331::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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const uint32_t color565 = display::ColorUtil::color_to_565(color);
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// where should the bits go in the big buffer array? math...
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uint16_t pos = (x + y * this->get_width_internal()) * SSD1331_BYTESPERPIXEL;
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this->buffer_[pos++] = (color565 >> 8) & 0xff;
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this->buffer_[pos] = color565 & 0xff;
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}
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void SSD1331::fill(Color color) {
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const uint32_t color565 = display::ColorUtil::color_to_565(color);
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for (uint32_t i = 0; i < this->get_buffer_length_(); i++) {
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if (i & 1) {
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this->buffer_[i] = color565 & 0xff;
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} else {
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this->buffer_[i] = (color565 >> 8) & 0xff;
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}
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}
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}
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void SSD1331::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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} // namespace ssd1331_base
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} // namespace esphome
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