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UARTComponent inline doc (#5930)
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edwardtfn authored and jesserockz committed Dec 18, 2023
1 parent 70dac54 commit 917e0f9
Showing 1 changed file with 85 additions and 3 deletions.
88 changes: 85 additions & 3 deletions esphome/components/uart/uart_component.h
Original file line number Diff line number Diff line change
Expand Up @@ -31,40 +31,122 @@ const LogString *parity_to_str(UARTParityOptions parity);

class UARTComponent {
public:
// Writes an array of bytes to the UART bus.
// @param data A vector of bytes to be written.
void write_array(const std::vector<uint8_t> &data) { this->write_array(&data[0], data.size()); }

// Writes a single byte to the UART bus.
// @param data The byte to be written.
void write_byte(uint8_t data) { this->write_array(&data, 1); };

// Writes a null-terminated string to the UART bus.
// @param str Pointer to the null-terminated string.
void write_str(const char *str) {
const auto *data = reinterpret_cast<const uint8_t *>(str);
this->write_array(data, strlen(str));
};

// Pure virtual method to write an array of bytes to the UART bus.
// @param data Pointer to the array of bytes.
// @param len Length of the array.
virtual void write_array(const uint8_t *data, size_t len) = 0;

// Reads a single byte from the UART bus.
// @param data Pointer to the byte where the read data will be stored.
// @return True if a byte was successfully read, false otherwise.
bool read_byte(uint8_t *data) { return this->read_array(data, 1); };

// Pure virtual method to peek the next byte in the UART buffer without removing it.
// @param data Pointer to the byte where the peeked data will be stored.
// @return True if a byte is available to peek, false otherwise.
virtual bool peek_byte(uint8_t *data) = 0;

// Pure virtual method to read an array of bytes from the UART bus.
// @param data Pointer to the array where the read data will be stored.
// @param len Number of bytes to read.
// @return True if the specified number of bytes were successfully read, false otherwise.
virtual bool read_array(uint8_t *data, size_t len) = 0;

/// Return available number of bytes.
// Pure virtual method to return the number of bytes available for reading.
// @return Number of available bytes.
virtual int available() = 0;
/// Block until all bytes have been written to the UART bus.

// Pure virtual method to block until all bytes have been written to the UART bus.
virtual void flush() = 0;

// Sets the TX (transmit) pin for the UART bus.
// @param tx_pin Pointer to the internal GPIO pin used for transmission.
void set_tx_pin(InternalGPIOPin *tx_pin) { this->tx_pin_ = tx_pin; }

// Sets the RX (receive) pin for the UART bus.
// @param rx_pin Pointer to the internal GPIO pin used for reception.
void set_rx_pin(InternalGPIOPin *rx_pin) { this->rx_pin_ = rx_pin; }

// Sets the size of the RX buffer.
// @param rx_buffer_size Size of the RX buffer in bytes.
void set_rx_buffer_size(size_t rx_buffer_size) { this->rx_buffer_size_ = rx_buffer_size; }

// Gets the size of the RX buffer.
// @return Size of the RX buffer in bytes.
size_t get_rx_buffer_size() { return this->rx_buffer_size_; }

// Sets the number of stop bits used in UART communication.
// @param stop_bits Number of stop bits.
void set_stop_bits(uint8_t stop_bits) { this->stop_bits_ = stop_bits; }

// Gets the number of stop bits used in UART communication.
// @return Number of stop bits.
uint8_t get_stop_bits() const { return this->stop_bits_; }

// Set the number of data bits used in UART communication.
// @param data_bits Number of data bits.
void set_data_bits(uint8_t data_bits) { this->data_bits_ = data_bits; }

// Get the number of data bits used in UART communication.
// @return Number of data bits.
uint8_t get_data_bits() const { return this->data_bits_; }

// Set the parity used in UART communication.
// @param parity Parity option.
void set_parity(UARTParityOptions parity) { this->parity_ = parity; }

// Get the parity used in UART communication.
// @return Parity option.
UARTParityOptions get_parity() const { return this->parity_; }

// Set the baud rate for UART communication.
// @param baud_rate Baud rate in bits per second.
void set_baud_rate(uint32_t baud_rate) { baud_rate_ = baud_rate; }

// Get the baud rate for UART communication.
// @return Baud rate in bits per second.
uint32_t get_baud_rate() const { return baud_rate_; }

#ifdef USE_ESP32
virtual void load_settings() = 0;
/**
* Load the UART settings.
* @param dump_config If true (default), output the new settings to logs; otherwise, change settings quietly.
*
* Example:
* ```cpp
* id(uart1).load_settings(false);
* ```
*
* This will load the current UART interface with the latest settings (baud_rate, parity, etc).
*/
virtual void load_settings(bool dump_config) = 0;

/**
* Load the UART settings.
*
* Example:
* ```cpp
* id(uart1).load_settings();
* ```
*
* This will load the current UART interface with the latest settings (baud_rate, parity, etc).
*/
virtual void load_settings() = 0;
#endif // USE_ESP32

#ifdef USE_UART_DEBUGGER
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