75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
#include "serial.h"
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#include "../shared/memory.h"
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#include "../shared/string.h"
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#include "cpuio.h"
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#include <stdarg.h>
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#include <stdint.h>
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// #include <string.h>
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uint16_t com_ports[8];
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uint8_t com_buffer[8][128];
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uint8_t com_buffer_index[8] = {0};
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void init_serial(){
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bda_t *bda = (void*)0x400;
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for(int i = 0; i < 4; i++){
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com_ports[i] = bda->com_ports[i];
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}
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}
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void serial_writeb(uint8_t port, uint8_t data){
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if(com_ports[port] == 0){
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com_buffer[port][com_buffer_index[port]++] = data;
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}
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outb(com_ports[port], data);
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}
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uint8_t serial_readb(uint8_t port){
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if(com_ports[port] == 0){
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return com_buffer[port][com_buffer_index[port]--];
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}
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return inb(com_ports[port]);
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}
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void serial_writereg(uint8_t port, uint8_t reg, uint8_t data){
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if(com_ports[port] == 0 || reg > 8) return;
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outb(com_ports[port] + reg, data);
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}
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uint8_t serial_readreg(uint8_t port, uint8_t reg){
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if(com_ports[port] == 0 || reg > 8) return -1;
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return inb(com_ports[port] + reg);
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}
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void debug_puts(char *string){
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while(*string){
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// serial_writeb(0, *(string++));
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outb(com_ports[0], *string++);
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}
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}
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void printf(char *string, ...){
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va_list vars;
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va_start(vars, string);
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while(*string){
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if(*string == '%'){
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int32_t num = 0;
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char numb[12];
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switch(*(string + 1)){
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case 'd':
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string += 2;
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num = va_arg(vars, int32_t);
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itoa(num, numb, 10);
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debug_puts(numb);
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continue;
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case 'x':
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// debug_puts(":3");
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string += 2;
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num = va_arg(vars, int32_t);
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// char hnumb[12];
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itoa(num, numb, 16);
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strpad(numb, '0', 8);
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debug_puts(numb);
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continue;
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}
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}
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outb(com_ports[0], *string);
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string++;
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}
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} |