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support spi for sn74hc595 (#5491)

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Co-authored-by: Jimmy Hedman <jimmy.hedman@gmail.com>
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
Angel Nunez Mencias
2023-11-07 10:15:13 +01:00
committed by GitHub
parent 78e3ce7718
commit ccffbfd3ae
4 changed files with 149 additions and 48 deletions
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esphome/components/sn74hc595/sn74hc595.cpp
+50 -20
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@@ -6,26 +6,39 @@ namespace sn74hc595 {
static const char *const TAG = "sn74hc595";
void SN74HC595Component::setup() {
void SN74HC595Component::pre_setup_() {
ESP_LOGCONFIG(TAG, "Setting up SN74HC595...");
if (this->have_oe_pin_) { // disable output
this->oe_pin_->setup();
this->oe_pin_->digital_write(true);
}
// initialize output pins
this->clock_pin_->setup();
this->data_pin_->setup();
}
void SN74HC595Component::post_setup_() {
this->latch_pin_->setup();
this->clock_pin_->digital_write(false);
this->data_pin_->digital_write(false);
this->latch_pin_->digital_write(false);
// send state to shift register
this->write_gpio_();
this->write_gpio();
}
void SN74HC595GPIOComponent::setup() {
this->pre_setup_();
this->clock_pin_->setup();
this->data_pin_->setup();
this->clock_pin_->digital_write(false);
this->data_pin_->digital_write(false);
this->post_setup_();
}
#ifdef USE_SPI
void SN74HC595SPIComponent::setup() {
this->pre_setup_();
this->spi_setup();
this->post_setup_();
}
#endif
void SN74HC595Component::dump_config() { ESP_LOGCONFIG(TAG, "SN74HC595:"); }
void SN74HC595Component::digital_write_(uint16_t pin, bool value) {
@@ -34,17 +47,38 @@ void SN74HC595Component::digital_write_(uint16_t pin, bool value) {
(this->sr_count_ * 8) - 1);
return;
}
this->output_bits_[pin] = value;
this->write_gpio_();
if (value) {
this->output_bytes_[pin / 8] |= (1 << (pin % 8));
} else {
this->output_bytes_[pin / 8] &= ~(1 << (pin % 8));
}
this->write_gpio();
}
void SN74HC595Component::write_gpio_() {
for (auto bit = this->output_bits_.rbegin(); bit != this->output_bits_.rend(); bit++) {
this->data_pin_->digital_write(*bit);
this->clock_pin_->digital_write(true);
this->clock_pin_->digital_write(false);
void SN74HC595GPIOComponent::write_gpio() {
for (auto byte = this->output_bytes_.rbegin(); byte != this->output_bytes_.rend(); byte++) {
for (int8_t i = 7; i >= 0; i--) {
bool bit = (*byte >> i) & 1;
this->data_pin_->digital_write(bit);
this->clock_pin_->digital_write(true);
this->clock_pin_->digital_write(false);
}
}
SN74HC595Component::write_gpio();
}
#ifdef USE_SPI
void SN74HC595SPIComponent::write_gpio() {
for (auto byte = this->output_bytes_.rbegin(); byte != this->output_bytes_.rend(); byte++) {
this->enable();
this->transfer_byte(*byte);
this->disable();
}
SN74HC595Component::write_gpio();
}
#endif
void SN74HC595Component::write_gpio() {
// pulse latch to activate new values
this->latch_pin_->digital_write(true);
this->latch_pin_->digital_write(false);
@@ -60,11 +94,7 @@ float SN74HC595Component::get_setup_priority() const { return setup_priority::IO
void SN74HC595GPIOPin::digital_write(bool value) {
this->parent_->digital_write_(this->pin_, value != this->inverted_);
}
std::string SN74HC595GPIOPin::dump_summary() const {
char buffer[32];
snprintf(buffer, sizeof(buffer), "%u via SN74HC595", pin_);
return buffer;
}
std::string SN74HC595GPIOPin::dump_summary() const { return str_snprintf("%u via SN74HC595", 18, pin_); }
} // namespace sn74hc595
} // namespace esphome