70 lines
1.8 KiB
C
70 lines
1.8 KiB
C
#ifdef _CONSOLE_H
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#define _CONSOLE_H
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#else
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/* Width of display in characters */
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#define _CONSOLE_WIDTH 21
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/* Height of the display in lines */
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#define _CONSOLE_HEIGHT 8
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/*
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* Size of the internal buffer in chars/bytes.
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* Can be set arbitrarily (but must not be 0)
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*/
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#define _CONSOLE_BUF_WIDTH (_CONSOLE_WIDTH + 1)
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/* Width of a tab (amount of spaces) */
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#define _CONSOLE_TAB_LEN 4
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/*
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* Structure to store the state of the console.
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* Contains the cursor position and an internal buffer.
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*/
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typedef struct {
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/*
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* Cursor position (column) of the next char to be written.
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* Unlike the convention set by CASIO:
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* the cursor position is 0-based!
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* The actual Casio cursor will not be set until the
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* consol is flushed!
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*/
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unsigned char cursor_x;
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/*
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* Cursor position (row) of the next char to be written.
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* Unlike the convention set by CASIO:
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* the cursor position is 0-based!
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* The actual Casio cursor will not be set until the
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* consol is flushed!
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*/
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unsigned char cursor_y;
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/*
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* Internal buffer of the console.
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* All those characters will be consecutive and in the same line.
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* If the cursor changes position, the buffer needs to be flushed.
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*/
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char buf[_CONSOLE_BUF_WIDTH];
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/*
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* Amount of characters in the internal buffer.
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*/
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unsigned char buf_strlen;
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} _console;
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/*
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* Console instance for the stdio functions like printf etc.
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*/
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extern _console _console_ctx;
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int _console_read(_console *ctx, int file, char *ptr, int len);
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int _console_write(_console *ctx, int file, char *ptr, int len);
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void _console_set_cursor(_console *ctx, unsigned char x, unsigned char y);
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void _console_flush(_console *ctx);
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void _console_putc(_console *ctx, char c);
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#endif /* _CONSOLE_H */ |