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52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
#include "tca9548a.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace tca9548a {
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static const char *const TAG = "tca9548a";
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i2c::ErrorCode TCA9548AChannel::readv(uint8_t address, i2c::ReadBuffer *buffers, size_t cnt) {
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auto err = parent_->switch_to_channel(channel_);
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if (err != i2c::ERROR_OK)
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return err;
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return parent_->bus_->readv(address, buffers, cnt);
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}
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i2c::ErrorCode TCA9548AChannel::writev(uint8_t address, i2c::WriteBuffer *buffers, size_t cnt, bool stop) {
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auto err = parent_->switch_to_channel(channel_);
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if (err != i2c::ERROR_OK)
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return err;
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return parent_->bus_->writev(address, buffers, cnt, stop);
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}
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void TCA9548AComponent::setup() {
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ESP_LOGCONFIG(TAG, "Setting up TCA9548A...");
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uint8_t status = 0;
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if (this->read(&status, 1) != i2c::ERROR_OK) {
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ESP_LOGI(TAG, "TCA9548A failed");
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this->mark_failed();
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return;
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}
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ESP_LOGD(TAG, "Channels currently open: %d", status);
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}
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void TCA9548AComponent::dump_config() {
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ESP_LOGCONFIG(TAG, "TCA9548A:");
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LOG_I2C_DEVICE(this);
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}
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i2c::ErrorCode TCA9548AComponent::switch_to_channel(uint8_t channel) {
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if (this->is_failed())
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return i2c::ERROR_NOT_INITIALIZED;
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if (current_channel_ == channel)
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return i2c::ERROR_OK;
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uint8_t channel_val = 1 << channel;
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auto err = this->write(&channel_val, 1);
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if (err == i2c::ERROR_OK) {
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current_channel_ = channel;
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}
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return err;
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}
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} // namespace tca9548a
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} // namespace esphome
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