shell_uart.h

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/*
 * Copyright (c) 2018 Nordic Semiconductor ASA
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef SHELL_UART_H__
#define SHELL_UART_H__
 
#include <zephyr/drivers/serial/uart_async_rx.h>
#include <zephyr/mgmt/mcumgr/transport/smp_shell.h>
#include <zephyr/shell/shell.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
extern const struct shell_transport_api shell_uart_transport_api;
 
#ifndef CONFIG_SHELL_BACKEND_SERIAL_RX_RING_BUFFER_SIZE
#define CONFIG_SHELL_BACKEND_SERIAL_RX_RING_BUFFER_SIZE 0
#endif
 
#ifndef CONFIG_SHELL_BACKEND_SERIAL_TX_RING_BUFFER_SIZE
#define CONFIG_SHELL_BACKEND_SERIAL_TX_RING_BUFFER_SIZE 0
#endif
 
#ifndef CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_COUNT
#define CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_COUNT 0
#endif
 
#ifndef CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_SIZE
#define CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_SIZE 0
#endif
 
#define ASYNC_RX_BUF_SIZE (CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_COUNT * \
                (CONFIG_SHELL_BACKEND_SERIAL_ASYNC_RX_BUFFER_SIZE + \
                 UART_ASYNC_RX_BUF_OVERHEAD))
 
struct shell_uart_common {
        const struct device *dev;
        shell_transport_handler_t handler;
        void *context;
        bool blocking_tx;
#ifdef CONFIG_MCUMGR_TRANSPORT_SHELL
        struct smp_shell_data smp;
#endif /* CONFIG_MCUMGR_TRANSPORT_SHELL */
};
 
struct shell_uart_int_driven {
        struct shell_uart_common common;
        struct ring_buf tx_ringbuf;
        struct ring_buf rx_ringbuf;
        uint8_t tx_buf[CONFIG_SHELL_BACKEND_SERIAL_TX_RING_BUFFER_SIZE];
        uint8_t rx_buf[CONFIG_SHELL_BACKEND_SERIAL_RX_RING_BUFFER_SIZE];
        struct k_timer dtr_timer;
        atomic_t tx_busy;
};
 
struct shell_uart_async {
        struct shell_uart_common common;
        struct k_sem tx_sem;
        struct uart_async_rx async_rx;
        struct uart_async_rx_config async_rx_config;
        atomic_t pending_rx_req;
        uint8_t rx_data[ASYNC_RX_BUF_SIZE];
};
 
struct shell_uart_polling {
        struct shell_uart_common common;
        struct ring_buf rx_ringbuf;
        uint8_t rx_buf[CONFIG_SHELL_BACKEND_SERIAL_RX_RING_BUFFER_SIZE];
        struct k_timer rx_timer;
};
 
#ifdef CONFIG_SHELL_BACKEND_SERIAL_API_POLLING
#define SHELL_UART_STRUCT struct shell_uart_polling
#elif defined(CONFIG_SHELL_BACKEND_SERIAL_API_ASYNC)
#define SHELL_UART_STRUCT struct shell_uart_async
#else
#define SHELL_UART_STRUCT struct shell_uart_int_driven
#endif
 
#define SHELL_UART_DEFINE(_name, ...)                                                              \
        static SHELL_UART_STRUCT _name##_shell_uart;                                               \
        struct shell_transport _name = {                                                           \
                .api = &shell_uart_transport_api,                                                  \
                .ctx = (struct shell_telnet *)&_name##_shell_uart,                                 \
        }
 
const struct shell *shell_backend_uart_get_ptr(void);
 
struct smp_shell_data *shell_uart_smp_shell_data_get_ptr(void);
 
#ifdef __cplusplus
}
#endif
 
#endif /* SHELL_UART_H__ */