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Support for pcd8544 (nokia 5110 and 3310) screen (#973)
* First version of working compontent for pc8544 screen * Fixed lint errors * Fixed lint errors #2
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5 changed files with 247 additions and 0 deletions
0
esphome/components/pcd8544/__init__.py
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esphome/components/pcd8544/__init__.py
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esphome/components/pcd8544/display.py
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esphome/components/pcd8544/display.py
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import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome import pins
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from esphome.components import display, spi
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from esphome.const import (
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CONF_DC_PIN, CONF_ID, CONF_LAMBDA, CONF_PAGES, CONF_RESET_PIN, CONF_CS_PIN,
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)
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DEPENDENCIES = ['spi']
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pcd8544_ns = cg.esphome_ns.namespace('pcd8544')
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PCD8544 = pcd8544_ns.class_('PCD8544', cg.PollingComponent, display.DisplayBuffer, spi.SPIDevice)
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CONFIG_SCHEMA = cv.All(display.FULL_DISPLAY_SCHEMA.extend({
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cv.GenerateID(): cv.declare_id(PCD8544),
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cv.Required(CONF_DC_PIN): pins.gpio_output_pin_schema,
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cv.Required(CONF_RESET_PIN): pins.gpio_output_pin_schema,
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cv.Required(CONF_CS_PIN): pins.gpio_output_pin_schema, # CE
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}).extend(cv.polling_component_schema('1s')).extend(spi.SPI_DEVICE_SCHEMA),
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cv.has_at_most_one_key(CONF_PAGES, CONF_LAMBDA))
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def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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yield cg.register_component(var, config)
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yield display.register_display(var, config)
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yield spi.register_spi_device(var, config)
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dc = yield cg.gpio_pin_expression(config[CONF_DC_PIN])
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cg.add(var.set_dc_pin(dc))
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reset = yield cg.gpio_pin_expression(config[CONF_RESET_PIN])
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cg.add(var.set_reset_pin(reset))
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if CONF_LAMBDA in config:
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lambda_ = yield cg.process_lambda(config[CONF_LAMBDA], [(display.DisplayBufferRef, 'it')],
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return_type=cg.void)
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cg.add(var.set_writer(lambda_))
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esphome/components/pcd8544/pcd_8544.cpp
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esphome/components/pcd8544/pcd_8544.cpp
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#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 *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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// TODO: in future version we may add a user a control over contrast
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this->command(this->PCD8544_SETVOP | 0x7f); // Experimentally determined
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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, int 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) {
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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(int color) {
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uint8_t fill = color ? 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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esphome/components/pcd8544/pcd_8544.h
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esphome/components/pcd8544/pcd_8544.h
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#pragma once
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#include "esphome/core/component.h"
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#include "esphome/components/spi/spi.h"
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#include "esphome/components/display/display_buffer.h"
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namespace esphome {
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namespace pcd8544 {
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class PCD8544 : public PollingComponent,
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public display::DisplayBuffer,
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public spi::SPIDevice<spi::BIT_ORDER_MSB_FIRST, spi::CLOCK_POLARITY_HIGH, spi::CLOCK_PHASE_TRAILING,
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spi::DATA_RATE_8MHZ> {
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public:
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const uint8_t PCD8544_POWERDOWN = 0x04;
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const uint8_t PCD8544_ENTRYMODE = 0x02;
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const uint8_t PCD8544_EXTENDEDINSTRUCTION = 0x01;
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const uint8_t PCD8544_DISPLAYBLANK = 0x0;
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const uint8_t PCD8544_DISPLAYNORMAL = 0x4;
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const uint8_t PCD8544_DISPLAYALLON = 0x1;
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const uint8_t PCD8544_DISPLAYINVERTED = 0x5;
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const uint8_t PCD8544_FUNCTIONSET = 0x20;
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const uint8_t PCD8544_DISPLAYCONTROL = 0x08;
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const uint8_t PCD8544_SETYADDR = 0x40;
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const uint8_t PCD8544_SETXADDR = 0x80;
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const uint8_t PCD8544_SETTEMP = 0x04;
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const uint8_t PCD8544_SETBIAS = 0x10;
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const uint8_t PCD8544_SETVOP = 0x80;
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void set_dc_pin(GPIOPin *dc_pin) { this->dc_pin_ = dc_pin; }
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void set_reset_pin(GPIOPin *reset) { this->reset_pin_ = reset; }
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float get_setup_priority() const override { return setup_priority::PROCESSOR; }
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void command(uint8_t value);
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void data(uint8_t value);
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void initialize();
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void dump_config() override;
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void HOT display();
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void update() override;
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void fill(int color) override;
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void setup() override {
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this->setup_pins_();
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this->initialize();
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}
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protected:
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void draw_absolute_pixel_internal(int x, int y, int color) override;
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void setup_pins_();
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void init_reset_();
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size_t get_buffer_length_();
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void start_command_();
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void end_command_();
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void start_data_();
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void end_data_();
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int get_width_internal() override;
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int get_height_internal() override;
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GPIOPin *reset_pin_;
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GPIOPin *dc_pin_;
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};
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} // namespace pcd8544
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} // namespace esphome
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@ -1444,6 +1444,12 @@ display:
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lambda: |-
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it.set_component_value("gauge", 50);
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it.set_component_text("textview", "Hello World!");
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- platform: pcd8544
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cs_pin: GPIO23
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dc_pin: GPIO23
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reset_pin: GPIO23
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lambda: |-
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it.rectangle(0, 0, it.get_width(), it.get_height());
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- platform: ssd1306_i2c
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model: "SSD1306_128X64"
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reset_pin: GPIO23
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