lordtet
d6465ade55
Instead of passing function pointers, we're passing structs with context now. The idea is the same, I/O functions require some struct with a function pointer and some generic memory that only the output device cares about. I/O just calls it. VGA has been reworked to accomodate this change, as well as default outputs being created for low-overhead use (such as interrupt handlers).
50 lines
1.1 KiB
C
50 lines
1.1 KiB
C
/* serial.h
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* Serial Interface
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*
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* Send/receive data via serial ports.
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*/
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#ifndef SERIAL_H
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#define SERIAL_H
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#include "asm.h"
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#include "io.h"
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#include <stdint.h>
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typedef struct SerialState_s {
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uint16_t port;
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} SerialState_t;
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extern char_writer_t* default_COM;
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/**
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* @brief Initialize a serial port for communication
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* @param port The serial port number to initialize
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* @return Status code indicating success or failure
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*/
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int serial_init(uint16_t port);
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/**
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* @brief Check if there is pending data to receive on the serial port
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* @return Non-zero if data is pending, 0 otherwise
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*/
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int serial_recv_pending();
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/**
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* @brief Receive a single byte from the serial port
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* @return The received byte as an 8-bit unsigned integer
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*/
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uint8_t serial_recv8(uint16_t port);
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/**
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* @brief Check if the serial port is ready to send data
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* @return Non-zero if ready to send, 0 otherwise
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*/
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int serial_send_pending(uint16_t port);
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/**
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* @brief Send a single byte through the serial port
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* @param data The 8-bit data byte to send
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*/
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int serial_send8(uint16_t port, char data);
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#endif
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