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65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
#include "tlc5947.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace tlc5947 {
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static const char *const TAG = "tlc5947";
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void TLC5947::setup() {
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this->data_pin_->setup();
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this->data_pin_->digital_write(true);
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this->clock_pin_->setup();
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this->clock_pin_->digital_write(true);
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this->lat_pin_->setup();
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this->lat_pin_->digital_write(true);
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if (this->outenable_pin_ != nullptr) {
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this->outenable_pin_->setup();
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this->outenable_pin_->digital_write(false);
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}
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this->pwm_amounts_.resize(this->num_chips_ * N_CHANNELS_PER_CHIP, 0);
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ESP_LOGCONFIG(TAG, "Done setting up TLC5947 output component.");
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}
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void TLC5947::dump_config() {
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ESP_LOGCONFIG(TAG, "TLC5947:");
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LOG_PIN(" Data Pin: ", this->data_pin_);
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LOG_PIN(" Clock Pin: ", this->clock_pin_);
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LOG_PIN(" LAT Pin: ", this->lat_pin_);
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if (this->outenable_pin_ != nullptr)
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LOG_PIN(" OE Pin: ", this->outenable_pin_);
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ESP_LOGCONFIG(TAG, " Number of chips: %u", this->num_chips_);
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}
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void TLC5947::loop() {
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if (!this->update_)
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return;
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this->lat_pin_->digital_write(false);
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// push the data out, MSB first, 12 bit word per channel, 24 channels per chip
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for (int32_t ch = N_CHANNELS_PER_CHIP * num_chips_ - 1; ch >= 0; ch--) {
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uint16_t word = pwm_amounts_[ch];
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for (uint8_t bit = 0; bit < 12; bit++) {
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this->clock_pin_->digital_write(false);
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this->data_pin_->digital_write(word & 0x800);
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word <<= 1;
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this->clock_pin_->digital_write(true);
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this->clock_pin_->digital_write(true); // TWH0>12ns, so we should be fine using this as delay
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}
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}
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this->clock_pin_->digital_write(false);
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// latch the values, so they will be applied
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this->lat_pin_->digital_write(true);
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delayMicroseconds(1); // TWH1 > 30ns
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this->lat_pin_->digital_write(false);
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this->update_ = false;
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}
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} // namespace tlc5947
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} // namespace esphome
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