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Transferred to UART communication

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This commit is contained in:
Jozef Nagy 2025-04-20 19:35:57 +02:00
parent 5c682c4209
commit 10ee4fcbd9
Signed by untrusted user who does not match committer: crz
GPG key ID: 459A4811CEAC7068
9 changed files with 33832 additions and 19 deletions
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56
boot/arch/x86_64/common/uart/uart.c Normal file
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/*********************************************************************************/
/* Module Name: uart.c */
/* Project: AurixOS */
/* */
/* Copyright (c) 2024-2025 Jozef Nagy */
/* */
/* This source is subject to the MIT License. */
/* See License.txt in the root of this repository. */
/* All other rights reserved. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR */
/* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, */
/* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE */
/* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER */
/* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, */
/* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE */
/* SOFTWARE. */
/*********************************************************************************/
#include <stdint.h>
#include <arch/cpu/cpu.h>
#include <uart/uart.h>
#define COM1 0x3f8
void uart_init(uint16_t baud_rate)
{
uint8_t divisor = 115200 / baud_rate;
outb(COM1 + 1, 0x00);
outb(COM1 + 3, 0x80);
outb(COM1 + 0, divisor & 0xFF);
outb(COM1 + 1, (divisor >> 8) & 0xFF);
outb(COM1 + 3, 0x03);
outb(COM1 + 2, 0xC7);
outb(COM1 + 4, 0x0B);
outb(COM1 + 4, 0x0F);
}
void uart_send(char c)
{
while ((inb(COM1 + 5) & 0x20) == 0);
outb(COM1, c);
}
void uart_sendstr(char *str)
{
while (*str != '\0') {
if (*str == '\n') {
uart_send('\r');
}
uart_send(*str);
str++;
}
}