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#include <stdint.h>
#include "../lib/lib.h"
#include "io.h"
uint8_t receive_b(uint16_t port) {
unsigned char value;
asm volatile ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
uint16_t receive_w(uint16_t port) {
unsigned char value;
asm volatile("inb %1,%0" : "=a"(value) : "Nd"(port)); // TODO: Fix inw error
return value;
}
uint32_t receive_l(uint16_t port) {
unsigned char value;
asm volatile ("inb %1, %0" : "=a"(value) : "Nd"(port));
return value;
}
void send_b(uint16_t port, uint8_t data) {
asm volatile ("outb %0, %1"::"a" (data), "Nd"(port));
}
void send_w(uint16_t port, uint16_t data) {
asm volatile ("outw %0, %1"::"a" (data), "Nd"(port));
}
void send_l(uint16_t port, uint32_t data) {
asm volatile ("outl %0, %1"::"a" (data), "Nd"(port));
}
void init_serial() {
send_b(0x3f8 + 1, 0x00);
send_b(0x3f8 + 3, 0x80);
send_b(0x3f8 + 0, 0x03);
send_b(0x3f8 + 1, 0x00);
send_b(0x3f8 + 3, 0x03);
send_b(0x3f8 + 2, 0xC7);
send_b(0x3f8 + 4, 0x0B);
write_serial("Installed serial connection!");
}
int is_transmit_empty() {
return receive_b(0x3f8 + 5) & 0x20;
}
void write_serial(char *data) {
for (size_t i = 0; i < strlen(data); i++) {
while (is_transmit_empty() == 0);
send_b(0x3f8, data[i]);
}
char *linebreak = "\n";
for (size_t i = 0; i < strlen(linebreak); i++) {
while (is_transmit_empty() == 0);
send_b(0x3f8, linebreak[i]);
}
}
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