uart_async_adapter.h

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/*
 * Copyright (c) 2021 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
#ifndef __UART_ASYNC_ADAPTER_H
#define __UART_ASYNC_ADAPTER_H
 
#include <zephyr/device.h>
#include <zephyr/drivers/uart.h>
#include <zephyr/kernel.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
struct uart_async_adapter_data {
        const struct device *target;
        uart_callback_t user_callback;
        void *user_data;
 
        /* The interface realization */
        struct k_spinlock lock;
 
        struct uart_async_adapter_data_rx {
                const uint8_t *buf;
                const uint8_t *curr_buf;
                volatile size_t size_left;
                struct k_timer timeout_timer;
                bool enabled;
        } tx;
 
        struct uart_async_adapter_data_tx {
                uint8_t *buf;
                uint8_t *curr_buf;
                uint8_t *last_notify_buf;
                size_t size_left;
                uint8_t *next_buf;
                size_t next_buf_len;
                int32_t timeout;
                struct k_timer timeout_timer;
                bool enabled;
        } rx;
};
 
extern const struct uart_driver_api uart_async_adapter_driver_api;
 
#define UART_ASYNC_ADAPTER_INST_DATA_NAME(_dev_name) _CONCAT(uart_async_adapter_data_, _dev_name)
 
#define UART_ASYNC_ADAPTER_INST_STATE_NAME(_dev_name) _CONCAT(uart_async_adapter_state_, _dev_name)
 
#define UART_ASYNC_ADAPTER_INST_NAME(_dev_name) _CONCAT(_dev_name, _inst)
 
#define UART_ASYNC_ADAPTER_INST_DEFINE(_dev) \
        static struct uart_async_adapter_data UART_ASYNC_ADAPTER_INST_DATA_NAME(_dev); \
        static struct device_state UART_ASYNC_ADAPTER_INST_STATE_NAME(_dev); \
        static const struct device UART_ASYNC_ADAPTER_INST_NAME(_dev) = { \
                .name = STRINGIFY(_dev), \
                .api = &uart_async_adapter_driver_api, \
                .state = &UART_ASYNC_ADAPTER_INST_STATE_NAME(_dev), \
                .data = &UART_ASYNC_ADAPTER_INST_DATA_NAME(_dev), \
        }; \
        static const struct device *const _dev = &UART_ASYNC_ADAPTER_INST_NAME(_dev)
 
void uart_async_adapter_init(const struct device *dev, const struct device *target);
 
#ifdef __cplusplus
}
#endif
 
#endif /* __UART_ASYNC_ADAPTER_H */