uart_rs485.h

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#ifndef NEXUS_UART_RS485_H
#define NEXUS_UART_RS485_H
 
#include "nexus/io/gpio.h"
#include "nexus/io/uart.h"
 
#ifdef __cplusplus
extern "C" {
#endif

typedef nx_result_t (*nx_uart_tx_validate_fn)(
    void* context, const nx_uart_tx_request_t* request);

typedef struct {
    const nx_uart_port_t* transport;
    const nx_gpio_port_t* direction;
    nx_uart_tx_validate_fn validate;
    uint32_t mask;
    nx_time_us_t setup_us;
    nx_time_us_t hold_us;
    bool active_high;
} nx_uart_rs485_config_t;

typedef struct {
    const nx_uart_rs485_config_t* config;
    nx_uart_tx_request_t inner;
    nx_uart_tx_request_t* active;
    nx_time_us_t boundary;
    nx_result_t terminal;
    size_t transferred;
    uint8_t phase;
    bool initialized;
    bool closing;
} nx_uart_rs485_state_t;
 
extern const nx_uart_ops_t nx_uart_rs485_ops;

nx_result_t nx_uart_rs485_initialize(nx_uart_rs485_state_t* state,
                                     const nx_uart_rs485_config_t* config);
 
#ifdef __cplusplus
}
#endif
#endif