mirror of
https://github.com/Threnklyn/esphome-dev.git
synced 2026-05-19 12:43:28 +02:00
Stefan Agner
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
#include "sn74hc595.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
namespace esphome {
|
|
namespace sn74hc595 {
|
|
|
|
static const char *const TAG = "sn74hc595";
|
|
|
|
void SN74HC595Component::setup() {
|
|
ESP_LOGCONFIG(TAG, "Setting up SN74HC595...");
|
|
|
|
if (this->have_oe_pin_) { // disable output
|
|
this->oe_pin_->pin_mode(OUTPUT);
|
|
this->oe_pin_->digital_write(true);
|
|
}
|
|
|
|
// initialize output pins
|
|
this->clock_pin_->pin_mode(OUTPUT);
|
|
this->data_pin_->pin_mode(OUTPUT);
|
|
this->latch_pin_->pin_mode(OUTPUT);
|
|
this->clock_pin_->digital_write(LOW);
|
|
this->data_pin_->digital_write(LOW);
|
|
this->latch_pin_->digital_write(LOW);
|
|
|
|
// send state to shift register
|
|
this->write_gpio_();
|
|
}
|
|
|
|
void SN74HC595Component::dump_config() { ESP_LOGCONFIG(TAG, "SN74HC595:"); }
|
|
|
|
bool SN74HC595Component::digital_read_(uint8_t pin) { return this->output_bits_ >> pin; }
|
|
|
|
void SN74HC595Component::digital_write_(uint8_t pin, bool value) {
|
|
uint32_t mask = 1UL << pin;
|
|
this->output_bits_ &= ~mask;
|
|
if (value)
|
|
this->output_bits_ |= mask;
|
|
this->write_gpio_();
|
|
}
|
|
|
|
bool SN74HC595Component::write_gpio_() {
|
|
for (int i = this->sr_count_ - 1; i >= 0; i--) {
|
|
uint8_t data = (uint8_t)(this->output_bits_ >> (8 * i) & 0xff);
|
|
for (int j = 0; j < 8; j++) {
|
|
this->data_pin_->digital_write(data & (1 << (7 - j)));
|
|
this->clock_pin_->digital_write(true);
|
|
this->clock_pin_->digital_write(false);
|
|
}
|
|
}
|
|
|
|
// pulse latch to activate new values
|
|
this->latch_pin_->digital_write(true);
|
|
this->latch_pin_->digital_write(false);
|
|
|
|
// enable output if configured
|
|
if (this->have_oe_pin_) {
|
|
this->oe_pin_->digital_write(false);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
float SN74HC595Component::get_setup_priority() const { return setup_priority::IO; }
|
|
|
|
void SN74HC595GPIOPin::setup() {}
|
|
|
|
bool SN74HC595GPIOPin::digital_read() { return this->parent_->digital_read_(this->pin_) != this->inverted_; }
|
|
|
|
void SN74HC595GPIOPin::digital_write(bool value) {
|
|
this->parent_->digital_write_(this->pin_, value != this->inverted_);
|
|
}
|
|
|
|
SN74HC595GPIOPin::SN74HC595GPIOPin(SN74HC595Component *parent, uint8_t pin, bool inverted)
|
|
: GPIOPin(pin, OUTPUT, inverted), parent_(parent) {}
|
|
|
|
} // namespace sn74hc595
|
|
} // namespace esphome
|