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#pragma once
#include <stdlib.h>
#include "ports.h"
/*
* Serial Port
*
* useful links:
* https://wiki.osdev.org/Serial_Ports
* https://www.lowlevel.eu/wiki/Serielle_Schnittstelle
*/
class SerialPort : public Console {
public:
SerialPort();
~SerialPort() = default;
bool self_check() const { return self_check_okay; }
bool ready_read();
uint8_t read();
bool ready_write();
void write(char c) override;
void write(ViewIterator& iter) override {
while (iter) write(iter.next());
}
void update_cursor() override {}
private:
bool self_check_okay;
enum PortOffset : uint16_t {
BaudDiv_l = 0, // if dlab is set
BaudDiv_h = 1, // if dlab is set
Data = 0, // read from receive buffer / write to transmit buffer
InterruptControl = 1, // interrupt enable
FifoControl = 2, // interrupt ID and FIFO control
LineControl = 3, // most significant bit is the DLAB
ModemControl = 4,
LineStatus = 5,
ModemStatus = 6,
Scratch = 7,
};
com1_port_t port;
};
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