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41 lines
989 B
C
41 lines
989 B
C
#ifndef PARALLEL_H
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#define PARALLEL_H
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#include <stdint.h>
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#include <stdbool.h>
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typedef enum {
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LPT_PORT_NONE = -1,
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LPT1_PORT = 0,
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LPT2_PORT = 1,
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LPT_MAX_PORTS = 2
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} lpt_port_t;
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typedef enum {
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LPT_MODE_COMPAT = 0, // Standard (SPP)
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LPT_MODE_BIDIR, // PS/2 bidirectional
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LPT_MODE_EPP, // IEEE 1284 EPP
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LPT_MODE_ECP // IEEE 1284 ECP
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} lpt_mode_t;
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typedef struct {
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uint16_t base; // Base I/O address (e.g., 0x378, 0x278)
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bool present; // Detected
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lpt_mode_t mode; // Current mode
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uint8_t irq; // IRQ line (if known/used)
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} lpt_device_t;
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extern lpt_device_t lpt_devices[LPT_MAX_PORTS];
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void lpt_init_all(void);
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void lpt_set_mode(lpt_port_t port, lpt_mode_t mode);
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// Simple polled I/O
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void lpt_write_byte(lpt_port_t port, uint8_t value);
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uint8_t lpt_read_byte(lpt_port_t port);
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// IRQ-driven hook (you implement the handler logic)
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void lpt_irq_handler(lpt_port_t port);
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#endif
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