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https://github.com/esphome/esphome.git
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126 lines
3 KiB
C++
126 lines
3 KiB
C++
#include "pcd_8544.h"
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#include "esphome/core/log.h"
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#include "esphome/core/application.h"
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#include "esphome/core/helpers.h"
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namespace esphome {
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namespace pcd8544 {
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static const char *const TAG = "pcd_8544";
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void PCD8544::setup_pins_() {
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this->spi_setup();
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this->init_reset_();
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this->dc_pin_->setup();
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}
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void PCD8544::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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void PCD8544::initialize() {
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this->init_internal_(this->get_buffer_length_());
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this->command(this->PCD8544_FUNCTIONSET | this->PCD8544_EXTENDEDINSTRUCTION);
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// LCD bias select (4 is optimal?)
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this->command(this->PCD8544_SETBIAS | 0x04);
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// contrast
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this->command(this->PCD8544_SETVOP | this->contrast_);
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// normal mode
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this->command(this->PCD8544_FUNCTIONSET);
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// Set display to Normal
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this->command(this->PCD8544_DISPLAYCONTROL | this->PCD8544_DISPLAYNORMAL);
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}
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void PCD8544::start_command_() {
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this->dc_pin_->digital_write(false);
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this->enable();
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}
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void PCD8544::end_command_() { this->disable(); }
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void PCD8544::start_data_() {
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this->dc_pin_->digital_write(true);
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this->enable();
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}
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void PCD8544::end_data_() { this->disable(); }
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int PCD8544::get_width_internal() { return 84; }
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int PCD8544::get_height_internal() { return 48; }
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size_t PCD8544::get_buffer_length_() {
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return size_t(this->get_width_internal()) * size_t(this->get_height_internal()) / 8u;
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}
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void HOT PCD8544::display() {
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uint8_t col, maxcol, p;
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for (p = 0; p < 6; p++) {
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this->command(this->PCD8544_SETYADDR | p);
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// start at the beginning of the row
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col = 0;
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maxcol = this->get_width_internal() - 1;
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this->command(this->PCD8544_SETXADDR | col);
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this->start_data_();
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for (; col <= maxcol; col++) {
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this->write_byte(this->buffer_[(this->get_width_internal() * p) + col]);
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}
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this->end_data_();
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}
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this->command(this->PCD8544_SETYADDR);
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}
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void HOT PCD8544::draw_absolute_pixel_internal(int x, int y, Color color) {
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if (x >= this->get_width_internal() || y >= this->get_height_internal() || x < 0 || y < 0) {
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return;
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}
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uint16_t pos = x + (y / 8) * this->get_width_internal();
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uint8_t subpos = y % 8;
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if (color.is_on()) {
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this->buffer_[pos] |= (1 << subpos);
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} else {
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this->buffer_[pos] &= ~(1 << subpos);
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}
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}
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void PCD8544::dump_config() {
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LOG_DISPLAY("", "PCD8544", this);
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LOG_PIN(" DC Pin: ", this->dc_pin_);
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LOG_PIN(" Reset Pin: ", this->reset_pin_);
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LOG_UPDATE_INTERVAL(this);
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}
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void PCD8544::command(uint8_t value) {
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this->start_command_();
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this->write_byte(value);
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this->end_command_();
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}
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void PCD8544::update() {
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this->do_update_();
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this->display();
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}
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void PCD8544::fill(Color color) {
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uint8_t fill = color.is_on() ? 0xFF : 0x00;
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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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} // namespace pcd8544
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} // namespace esphome
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