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Touchscreen: add support for CST226 controller chip (#6151)
--------- Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
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6 changed files with 205 additions and 0 deletions
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@ -81,6 +81,7 @@ esphome/components/copy/* @OttoWinter
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esphome/components/cover/* @esphome/core
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esphome/components/cs5460a/* @balrog-kun
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esphome/components/cse7761/* @berfenger
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esphome/components/cst226/* @clydebarrow
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esphome/components/cst816/* @clydebarrow
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esphome/components/ct_clamp/* @jesserockz
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esphome/components/current_based/* @djwmarcx
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6
esphome/components/cst226/__init__.py
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6
esphome/components/cst226/__init__.py
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import esphome.codegen as cg
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CODEOWNERS = ["@clydebarrow"]
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DEPENDENCIES = ["i2c"]
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cst226_ns = cg.esphome_ns.namespace("cst226")
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38
esphome/components/cst226/touchscreen/__init__.py
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38
esphome/components/cst226/touchscreen/__init__.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 i2c, touchscreen
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from esphome.const import CONF_INTERRUPT_PIN, CONF_ID, CONF_RESET_PIN
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from .. import cst226_ns
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CST226Touchscreen = cst226_ns.class_(
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"CST226Touchscreen",
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touchscreen.Touchscreen,
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i2c.I2CDevice,
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)
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CST226ButtonListener = cst226_ns.class_("CST226ButtonListener")
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CONFIG_SCHEMA = (
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touchscreen.touchscreen_schema("100ms")
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.extend(
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{
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cv.GenerateID(): cv.declare_id(CST226Touchscreen),
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cv.Optional(CONF_INTERRUPT_PIN): pins.internal_gpio_input_pin_schema,
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cv.Optional(CONF_RESET_PIN): pins.gpio_output_pin_schema,
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}
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)
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.extend(i2c.i2c_device_schema(0x5A))
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)
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async def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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await touchscreen.register_touchscreen(var, config)
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await i2c.register_i2c_device(var, config)
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if interrupt_pin := config.get(CONF_INTERRUPT_PIN):
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cg.add(var.set_interrupt_pin(await cg.gpio_pin_expression(interrupt_pin)))
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if reset_pin := config.get(CONF_RESET_PIN):
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cg.add(var.set_reset_pin(await cg.gpio_pin_expression(reset_pin)))
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92
esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
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92
esphome/components/cst226/touchscreen/cst226_touchscreen.cpp
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#include "cst226_touchscreen.h"
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namespace esphome {
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namespace cst226 {
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void CST226Touchscreen::setup() {
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esph_log_config(TAG, "Setting up CST226 Touchscreen...");
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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(5);
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this->reset_pin_->digital_write(false);
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delay(5);
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this->reset_pin_->digital_write(true);
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this->set_timeout(30, [this] { this->continue_setup_(); });
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} else {
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this->continue_setup_();
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}
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}
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void CST226Touchscreen::update_touches() {
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uint8_t data[28];
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if (!this->read_bytes(CST226_REG_STATUS, data, sizeof data)) {
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this->status_set_warning();
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this->skip_update_ = true;
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return;
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}
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this->status_clear_warning();
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if (data[6] != 0xAB || data[0] == 0xAB || data[5] == 0x80) {
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this->skip_update_ = true;
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return;
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}
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uint8_t num_of_touches = data[5] & 0x7F;
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if (num_of_touches == 0 || num_of_touches > 5) {
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this->write_byte(0, 0xAB);
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return;
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}
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size_t index = 0;
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for (uint8_t i = 0; i != num_of_touches; i++) {
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uint8_t id = data[index] >> 4;
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int16_t x = (data[index + 1] << 4) | ((data[index + 3] >> 4) & 0x0F);
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int16_t y = (data[index + 2] << 4) | (data[index + 3] & 0x0F);
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int16_t z = data[index + 4];
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this->add_raw_touch_position_(id, x, y, z);
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esph_log_v(TAG, "Read touch %d: %d/%d", id, x, y);
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index += 5;
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if (i == 0)
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index += 2;
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}
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}
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void CST226Touchscreen::continue_setup_() {
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uint8_t buffer[8];
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if (this->interrupt_pin_ != nullptr) {
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this->interrupt_pin_->setup();
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this->attach_interrupt_(this->interrupt_pin_, gpio::INTERRUPT_FALLING_EDGE);
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}
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buffer[0] = 0xD1;
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if (this->write_register16(0xD1, buffer, 1) != i2c::ERROR_OK) {
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esph_log_e(TAG, "Write byte to 0xD1 failed");
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this->mark_failed();
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return;
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}
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delay(10);
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if (this->read16_(0xD204, buffer, 4)) {
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uint16_t chip_id = buffer[2] + (buffer[3] << 8);
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uint16_t project_id = buffer[0] + (buffer[1] << 8);
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esph_log_config(TAG, "Chip ID %X, project ID %x", chip_id, project_id);
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}
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if (this->x_raw_max_ == 0 || this->y_raw_max_ == 0) {
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if (this->read16_(0xD1F8, buffer, 4)) {
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this->x_raw_max_ = buffer[0] + (buffer[1] << 8);
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this->y_raw_max_ = buffer[2] + (buffer[3] << 8);
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} else {
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this->x_raw_max_ = this->display_->get_native_width();
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this->y_raw_max_ = this->display_->get_native_height();
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}
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}
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this->setup_complete_ = true;
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esph_log_config(TAG, "CST226 Touchscreen setup complete");
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}
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void CST226Touchscreen::dump_config() {
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ESP_LOGCONFIG(TAG, "CST226 Touchscreen:");
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LOG_I2C_DEVICE(this);
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LOG_PIN(" Interrupt Pin: ", this->interrupt_pin_);
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LOG_PIN(" Reset Pin: ", this->reset_pin_);
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}
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} // namespace cst226
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} // namespace esphome
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44
esphome/components/cst226/touchscreen/cst226_touchscreen.h
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44
esphome/components/cst226/touchscreen/cst226_touchscreen.h
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#pragma once
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#include "esphome/components/i2c/i2c.h"
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#include "esphome/components/touchscreen/touchscreen.h"
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#include "esphome/core/component.h"
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#include "esphome/core/hal.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace cst226 {
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static const char *const TAG = "cst226.touchscreen";
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static const uint8_t CST226_REG_STATUS = 0x00;
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class CST226Touchscreen : public touchscreen::Touchscreen, public i2c::I2CDevice {
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public:
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void setup() override;
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void update_touches() override;
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void dump_config() override;
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void set_interrupt_pin(InternalGPIOPin *pin) { this->interrupt_pin_ = pin; }
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void set_reset_pin(GPIOPin *pin) { this->reset_pin_ = pin; }
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bool can_proceed() override { return this->setup_complete_ || this->is_failed(); }
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protected:
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bool read16_(uint16_t addr, uint8_t *data, size_t len) {
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if (this->read_register16(addr, data, len) != i2c::ERROR_OK) {
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esph_log_e(TAG, "Read data from 0x%04X failed", addr);
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this->mark_failed();
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return false;
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}
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return true;
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}
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void continue_setup_();
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InternalGPIOPin *interrupt_pin_{};
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GPIOPin *reset_pin_{};
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uint8_t chip_id_{};
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bool setup_complete_{};
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};
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} // namespace cst226
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} // namespace esphome
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24
tests/components/cst226/test.esp32-c3.yaml
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24
tests/components/cst226/test.esp32-c3.yaml
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spi:
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- id: spi_id_1
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clk_pin: GPIO7
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mosi_pin: GPIO6
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interface: any
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display:
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- platform: ili9xxx
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id: displ8
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model: ili9342
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cs_pin: GPIO5
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dc_pin: GPIO4
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reset_pin:
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number: GPIO21
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i2c:
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scl: GPIO18
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sda: GPIO8
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touchscreen:
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- platform: cst226
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interrupt_pin: GPIO3
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reset_pin: GPIO20
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