64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
#ifndef printer_h
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#define printer_h
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#include <stdint.h>
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#include <stdbool.h>
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#include "defs.h"
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#define GB_PRINTER_MAX_COMMAND_LENGTH 0x280
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#define GB_PRINTER_DATA_SIZE 0x280
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typedef void (*GB_print_image_callback_t)(GB_gameboy_t *gb,
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uint32_t *image,
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uint8_t height,
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uint8_t top_margin,
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uint8_t bottom_margin,
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uint8_t exposure);
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typedef struct
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{
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/* Communication state machine */
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enum {
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GB_PRINTER_COMMAND_MAGIC1,
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GB_PRINTER_COMMAND_MAGIC2,
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GB_PRINTER_COMMAND_ID,
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GB_PRINTER_COMMAND_COMPRESSION,
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GB_PRINTER_COMMAND_LENGTH_LOW,
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GB_PRINTER_COMMAND_LENGTH_HIGH,
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GB_PRINTER_COMMAND_DATA,
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GB_PRINTER_COMMAND_CHECKSUM_LOW,
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GB_PRINTER_COMMAND_CHECKSUM_HIGH,
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GB_PRINTER_COMMAND_ACTIVE,
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GB_PRINTER_COMMAND_STATUS,
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} command_state : 8;
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enum {
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GB_PRINTER_INIT_COMMAND = 1,
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GB_PRINTER_START_COMMAND = 2,
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GB_PRINTER_DATA_COMMAND = 4,
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GB_PRINTER_NOP_COMMAND = 0xF,
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} command_id : 8;
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bool compression;
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uint16_t length_left;
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uint8_t command_data[GB_PRINTER_MAX_COMMAND_LENGTH];
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uint16_t command_length;
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uint16_t checksum;
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uint8_t status;
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uint8_t byte_to_send;
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uint8_t image[160 * 200];
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uint16_t image_offset;
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uint64_t idle_time;
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uint8_t compression_run_lenth;
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bool compression_run_is_compressed;
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uint8_t bits_received;
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uint8_t byte_being_received;
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bool bit_to_send;
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} GB_printer_t;
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void GB_connect_printer(GB_gameboy_t *gb, GB_print_image_callback_t callback);
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#endif
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