mirror of
https://github.com/davidgiven/fluxengine.git
synced 2025-10-31 11:17:01 -07:00
607bb141b3
then we read the pulsetrain into nice tidy bits with a proper clock, which makes the decoder's job way easier. We can actually get rid of the entire MFM decoder state machine. Also, after sorting out the magic bit patterns at the beginning of records, we can now reliably pull them out of the bitstream without needing to know anything about the records themselves.
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
#ifndef GLOBALS_H
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#define GLOBALS_H
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#define _BSD_SOURCE
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#if defined _WIN32 || defined __CYGWIN__
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#define WINDOWS
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#endif
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#include <string.h>
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#include <endian.h>
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#include "protocol.h"
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typedef int nanoseconds_t; /* maximum value is over 2s, which is fine */
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struct encoding_buffer
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{
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int pulselength_ns;
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int length_pulses;
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bool* bitmap;
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};
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extern struct encoding_buffer* create_encoding_buffer(int pulselength_ns, int length_pulses);
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extern void free_encoding_buffer(struct encoding_buffer* buffer);
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extern void encoding_buffer_pulse(struct encoding_buffer* buffer, int timestamp_ns);
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extern struct fluxmap* encoding_buffer_encode(const struct encoding_buffer* buffer);
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struct fluxmap
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{
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int length_ticks;
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int length_us;
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int bytes;
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int buffersize;
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uint8_t* intervals;
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};
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extern struct fluxmap* create_fluxmap(void);
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extern void free_fluxmap(struct fluxmap* fluxmap);
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extern struct fluxmap* copy_fluxmap(const struct fluxmap* fluxmap);
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extern void fluxmap_clear(struct fluxmap* fluxmap);
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extern void fluxmap_append_intervals(struct fluxmap* fluxmap, const uint8_t* intervals, int count);
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extern void fluxmap_append_interval(struct fluxmap* fluxmap, uint8_t interval);
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extern int fluxmap_seek_clock(const struct fluxmap* fluxmap, int* cursor, int pulses);
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extern nanoseconds_t fluxmap_guess_clock(const struct fluxmap* fluxmap);
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extern void fluxmap_precompensate(struct fluxmap* fluxmap, int threshold_ticks, int amount_ticks);
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extern struct encoding_buffer* fluxmap_decode(const struct fluxmap* fluxmap, int clock_ns);
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extern void error(const char* message, ...);
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extern double gettime(void);
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extern int countargs(char* const* argv);
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extern void usb_init(void);
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extern void usb_cmd_send(void* ptr, int len);
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extern void usb_cmd_recv(void* ptr, int len);
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extern int usb_get_version(void);
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extern void usb_seek(int track);
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extern int usb_measure_speed(void);
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extern void usb_bulk_test(void);
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extern struct fluxmap* usb_read(int side);
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extern void usb_write(int side, struct fluxmap* fluxmap);
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extern void cmd_rpm(char* const* argv);
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extern void cmd_usbbench(char* const* argv);
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extern void cmd_read(char* const* argv);
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extern void cmd_write(char* const* argv);
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extern void cmd_mfmdecode(char* const* argv);
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extern void cmd_testpattern(char* const* argv);
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extern void cmd_fluxdump(char* const* argv);
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extern void cmd_calibrate(char* const* argv);
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extern void cmd_getclock(char* const* argv);
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#endif
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