mirror of
https://github.com/Threnklyn/esphome-dev.git
synced 2026-05-20 21:13:28 +02:00
Stefan Agner
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
#include "gpio_lcd_display.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace lcd_gpio {
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static const char *const TAG = "lcd_gpio";
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void GPIOLCDDisplay::setup() {
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ESP_LOGCONFIG(TAG, "Setting up GPIO LCD Display...");
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this->rs_pin_->setup(); // OUTPUT
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this->rs_pin_->digital_write(false);
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if (this->rw_pin_ != nullptr) {
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this->rw_pin_->setup(); // OUTPUT
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this->rw_pin_->digital_write(false);
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}
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this->enable_pin_->setup(); // OUTPUT
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this->enable_pin_->digital_write(false);
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for (uint8_t i = 0; i < (this->is_four_bit_mode() ? 4 : 8); i++) {
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this->data_pins_[i]->setup(); // OUTPUT
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this->data_pins_[i]->digital_write(false);
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}
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LCDDisplay::setup();
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}
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void GPIOLCDDisplay::dump_config() {
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ESP_LOGCONFIG(TAG, "GPIO LCD Display:");
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ESP_LOGCONFIG(TAG, " Columns: %u, Rows: %u", this->columns_, this->rows_);
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LOG_PIN(" RS Pin: ", this->rs_pin_);
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LOG_PIN(" RW Pin: ", this->rw_pin_);
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LOG_PIN(" Enable Pin: ", this->enable_pin_);
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for (uint8_t i = 0; i < (this->is_four_bit_mode() ? 4 : 8); i++) {
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ESP_LOGCONFIG(TAG, " Data Pin %u" LOG_PIN_PATTERN, i, LOG_PIN_ARGS(this->data_pins_[i]));
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}
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LOG_UPDATE_INTERVAL(this);
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}
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void GPIOLCDDisplay::write_n_bits(uint8_t value, uint8_t n) {
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for (uint8_t i = 0; i < n; i++)
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this->data_pins_[i]->digital_write(value & (1 << i));
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this->enable_pin_->digital_write(true);
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delayMicroseconds(1); // >450ns
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this->enable_pin_->digital_write(false);
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delayMicroseconds(40); // >37us
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}
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void GPIOLCDDisplay::send(uint8_t value, bool rs) {
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this->rs_pin_->digital_write(rs);
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if (this->is_four_bit_mode()) {
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this->write_n_bits(value >> 4, 4);
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this->write_n_bits(value, 4);
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} else {
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this->write_n_bits(value, 8);
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}
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}
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} // namespace lcd_gpio
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} // namespace esphome
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