64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
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/**
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* @file uart.h
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* @author longjin (longjin@RinGoTek.cn)
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* @brief uart驱动程序 RS-232驱动
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* @version 0.1
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* @date 2022-04-15
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*
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* @copyright Copyright (c) 2022
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*
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*/
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#pragma once
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#include <common/glib.h>
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#define UART_SUCCESS 0
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#define E_UART_BITS_RATE_ERROR 1
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#define E_UART_SERIAL_FAULT 2
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enum uart_port_io_addr
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{
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COM1 = 0x3f8,
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COM2 = 0x2f8,
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COM3 = 0x3e8,
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COM4 = 0x2e8,
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COM5 = 0x5f8,
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COM6 = 0x4f8,
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COM7 = 0x5e8,
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COM8 = 0x4E8,
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};
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enum uart_register_offset
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{
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REG_DATA = 0,
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REG_INTERRUPT_ENABLE = 1,
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REG_II_FIFO = 2, // Interrupt Identification and FIFO control registers
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REG_LINE_CONTROL = 3,
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REG_MODEM_CONTROL = 4,
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REG_LINE_STATUS = 5,
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REG_MODEM_STATUE = 6,
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REG_SCRATCH = 7
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};
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/**
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* @brief 初始化com口
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*
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* @param port com口的端口号
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* @param bits_rate 通信的比特率
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*/
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int uart_init(uint32_t port, uint32_t bits_rate);
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/**
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* @brief 发送数据
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*
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* @param port 端口号
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* @param c 要发送的数据
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*/
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void uart_send(uint32_t port, char c);
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/**
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* @brief 从uart接收数据
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*
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* @param port 端口号
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* @return uchar 接收到的数据
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*/
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uchar uart_read(uint32_t port);
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