esphome/esphome/components/uart/uart_component.h

176 lines
5.8 KiB
C++

#pragma once
#include <vector>
#include <cstring>
#include "esphome/core/defines.h"
#include "esphome/core/component.h"
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
#ifdef USE_UART_DEBUGGER
#include "esphome/core/automation.h"
#endif
namespace esphome {
namespace uart {
enum UARTParityOptions {
UART_CONFIG_PARITY_NONE,
UART_CONFIG_PARITY_EVEN,
UART_CONFIG_PARITY_ODD,
};
#ifdef USE_UART_DEBUGGER
enum UARTDirection {
UART_DIRECTION_RX,
UART_DIRECTION_TX,
UART_DIRECTION_BOTH,
};
#endif
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;
// Pure virtual method to return the number of bytes available for reading.
// @return Number of available bytes.
virtual int available() = 0;
// 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_; }
#if defined(USE_ESP8266) || defined(USE_ESP32)
/**
* 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){};
/**
* 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(){};
#endif // USE_ESP8266 || USE_ESP32
#ifdef USE_UART_DEBUGGER
void add_debug_callback(std::function<void(UARTDirection, uint8_t)> &&callback) {
this->debug_callback_.add(std::move(callback));
}
#endif
protected:
virtual void check_logger_conflict() = 0;
bool check_read_timeout_(size_t len = 1);
InternalGPIOPin *tx_pin_;
InternalGPIOPin *rx_pin_;
size_t rx_buffer_size_;
uint32_t baud_rate_;
uint8_t stop_bits_;
uint8_t data_bits_;
UARTParityOptions parity_;
#ifdef USE_UART_DEBUGGER
CallbackManager<void(UARTDirection, uint8_t)> debug_callback_{};
#endif
};
} // namespace uart
} // namespace esphome