christoph/lecture-operating-system-development
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merged cleanup

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This commit is contained in:
Christoph Urlacher
2022-07-24 21:12:31 +02:00
parent 5ff3d72bfd
commit 6481bae5f6
92 changed files with 663 additions and 755 deletions
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19
c_os/user/devices/SerialOut.cc
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@ -1,6 +1,8 @@
#include "user/devices/SerialOut.h"
int SerialOut::init() const {
const IOport SerialOut::com1(0x3f8);
SerialOut::SerialOut() {
// NOTE: I could add different ports for every register but this was easier as it's that way on OSDev
com1.outb(1, 0x00); // Disable all interrupts
com1.outb(3, 0x80); // Enable DLAB (set baud rate divisor)
@ -13,14 +15,11 @@ int SerialOut::init() const {
com1.outb(0xAE); // Test serial chip (send byte 0xAE and check if serial returns same byte)
// Check if serial is faulty (i.e: not same byte as sent)
if (com1.inb() != 0xAE) {
return 1;
if (com1.inb() == 0xAE) {
// If serial is not faulty set it in normal operation mode
// (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
com1.outb(4, 0x0F);
}
// If serial is not faulty set it in normal operation mode
// (not-loopback with IRQs enabled and OUT#1 and OUT#2 bits enabled)
com1.outb(4, 0x0F);
return 0;
}
int SerialOut::serial_received() {
@ -44,11 +43,11 @@ void SerialOut::write(const char a) {
void SerialOut::write(const char* a) {
const char* current = a;
do {
this->write(*current);
write(*current);
current = current + 1;
} while (*current != '\0');
}
void SerialOut::write(const bse::string& a) {
write((const char*)a);
write(static_cast<const char*>(a));
}