55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* Copyright © 2020 tyrolyean
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _16550_H
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#define _16550_H
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#include <stdint.h>
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#include <stdio.h>
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/* Registers in the 16550 UART */
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#define UART_REG_DLLS 0
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#define UART_REG_DLMS 1
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#define UART_REG_TXRX 0
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#define UART_REG_IER 1
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#define UART_REG_IIR 2
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#define UART_REG_LCR 3
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#define UART_REG_MCR 4
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#define UART_REG_LSR 5
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#define UART_REG_MSR 6
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#define UART_REG_SCR 7
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/* The printf function in the background performs automatic column wrapping by
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* finding the first space character within 10 characters ofthe display columns
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* and replacingit with a newline character
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*/
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#define DISPLAY_COLUMNS 80
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void init_16550();
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void write_to_uart(uint8_t addr, uint8_t data);
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uint8_t read_from_uart(uint8_t addr);
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void init_uart();
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int println(const char* output,...);
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int putchar_16550(char var, FILE *stream);
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void writechar_16550(char var);
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void routine_uart();
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#endif
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