mirror of
https://github.com/Threnklyn/esphome-dev.git
synced 2026-05-23 22:28:28 +02:00
phjr
3c9712d683
* add support for SN74HC595 shift register * fix linter errors * more linter reported issues fixed * hopefully last linter error cleanup * one more linter fix * looks like the linter is always keeping stuff for later, is this the final fix? * add test Co-authored-by: Guillermo Ruffino <glm.net@gmail.com>
71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
#include "sn74hc595.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace sn74hc595 {
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static const char *TAG = "sn74hc595";
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void SN74HC595Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SN74HC595...");
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if (this->have_oe_pin_) { // disable output
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pinMode(this->oe_pin_->get_pin(), OUTPUT);
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digitalWrite(this->oe_pin_->get_pin(), HIGH);
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}
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// initialize output pins
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pinMode(this->clock_pin_->get_pin(), OUTPUT);
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pinMode(this->data_pin_->get_pin(), OUTPUT);
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pinMode(this->latch_pin_->get_pin(), OUTPUT);
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digitalWrite(this->clock_pin_->get_pin(), LOW);
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digitalWrite(this->data_pin_->get_pin(), LOW);
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digitalWrite(this->latch_pin_->get_pin(), LOW);
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// send state to shift register
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this->write_gpio_();
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}
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void SN74HC595Component::dump_config() { ESP_LOGCONFIG(TAG, "SN74HC595:"); }
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bool SN74HC595Component::digital_read_(uint8_t pin) { return bitRead(this->output_bits_, pin); }
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void SN74HC595Component::digital_write_(uint8_t pin, bool value) {
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bitWrite(this->output_bits_, pin, value);
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this->write_gpio_();
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}
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bool SN74HC595Component::write_gpio_() {
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for (int i = this->sr_count_ - 1; i >= 0; i--) {
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uint8_t data = (uint8_t)(this->output_bits_ >> (8 * i) & 0xff);
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shiftOut(this->data_pin_->get_pin(), this->clock_pin_->get_pin(), MSBFIRST, data);
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}
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// pulse latch to activate new values
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digitalWrite(this->latch_pin_->get_pin(), HIGH);
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digitalWrite(this->latch_pin_->get_pin(), LOW);
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// enable output if configured
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if (this->have_oe_pin_) {
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digitalWrite(this->oe_pin_->get_pin(), LOW);
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}
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return true;
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}
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float SN74HC595Component::get_setup_priority() const { return setup_priority::IO; }
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void SN74HC595GPIOPin::setup() {}
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bool SN74HC595GPIOPin::digital_read() { return this->parent_->digital_read_(this->pin_) != this->inverted_; }
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void SN74HC595GPIOPin::digital_write(bool value) {
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this->parent_->digital_write_(this->pin_, value != this->inverted_);
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}
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SN74HC595GPIOPin::SN74HC595GPIOPin(SN74HC595Component *parent, uint8_t pin, bool inverted)
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: GPIOPin(pin, OUTPUT, inverted), parent_(parent) {}
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} // namespace sn74hc595
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} // namespace esphome
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