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101 lines
2.7 KiB
C
101 lines
2.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#pragma once
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <inttypes.h>
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#include "driver/uart.h"
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/**
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* Function prototype for UART driver to ask for more data to send.
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* Returns -1 if no more data is available for TX.
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* Driver must call this with interrupts disabled.
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*/
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typedef int (*hci_uart_tx_char)(void *arg);
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/**
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* Function prototype for UART driver to report that transmission is
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* complete. This should be called when transmission of last byte is
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* finished.
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* Driver must call this with interrupts disabled.
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*/
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typedef void (*hci_uart_tx_done)(void *arg);
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/**
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* Function prototype for UART driver to report incoming byte of data.
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* Returns -1 if data was dropped.
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* Driver must call this with interrupts disabled.
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*/
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typedef int (*hci_uart_rx_char)(void *arg, uint8_t byte);
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/**
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* Initializes given uart. Mapping of logical UART number to physical
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* UART/GPIO pins is in BSP.
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*/
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int hci_uart_init_cbs(int uart, hci_uart_tx_char tx_func,
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hci_uart_tx_done tx_done, hci_uart_rx_char rx_func, void *arg);
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/**
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* Applies given configuration to UART.
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*
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* @param port_num The UART number to configure
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* @param speed The baudrate in bps to configure
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* @param databits The number of databits to send per byte
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* @param stopbits The number of stop bits to send
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* @param parity The UART parity
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* @param flow_ctl Flow control settings on the UART
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*
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* @return 0 on success, non-zero error code on failure
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*/
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int hci_uart_config(int port_num, int32_t baud_rate, uint8_t data_bits, uint8_t stop_bits,
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uart_parity_t parity, uart_hw_flowcontrol_t flow_ctl);
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/**
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* Close UART port. Can call hal_uart_config() with different settings after
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* calling this.
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*
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* @param port_num The UART number to close
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*/
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int hci_uart_close(int port_num);
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/**
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* More data queued for transmission. UART driver will start asking for that
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* data.
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*
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* @param port_num The UART number to start TX on
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*/
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void hci_uart_start_tx(int port_num);
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/**
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* Upper layers have consumed some data, and are now ready to receive more.
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* This is meaningful after uart_rx_char callback has returned -1 telling
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* that no more data can be accepted.
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*
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* @param port_num The UART number to begin RX on
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*/
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void hci_uart_start_rx(int port_num);
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/**
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* @brief reconfig hci uart pin
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*
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* @param tx_pin The Tx pin
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* @param rx_pin The Rx pin
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* @param cts_pin The CTS pin
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* @param rts_pin The RTS pin
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* @return int 0 on success, non-zero error code on failure
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*/
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int hci_uart_reconfig_pin(int tx_pin, int rx_pin, int cts_pin, int rts_pin);
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#ifdef __cplusplus
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}
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#endif
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