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49 lines
1.4 KiB
C++
49 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::write_readv(uint8_t address, const uint8_t *write_buffer, size_t write_count,
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uint8_t *read_buffer, size_t read_count) {
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auto err = this->parent_->switch_to_channel(channel_);
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if (err != i2c::ERROR_OK)
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return err;
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err = this->parent_->bus_->write_readv(address, write_buffer, write_count, read_buffer, read_count);
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this->parent_->disable_all_channels();
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return err;
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}
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void TCA9548AComponent::setup() {
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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_LOGE(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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uint8_t channel_val = 1 << channel;
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return this->write(&channel_val, 1);
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}
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void TCA9548AComponent::disable_all_channels() {
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if (this->write(&TCA9548A_DISABLE_CHANNELS_COMMAND, 1) != i2c::ERROR_OK) {
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ESP_LOGE(TAG, "Failed to disable all channels.");
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this->status_set_error(); // couldn't disable channels, set error status
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}
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}
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} // namespace tca9548a
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} // namespace esphome
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