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bppio.h

/* Cut-down version for handshake-less arbitrary bit pattern version
   of bpp.  The original is in /usr/include/sys/bpp_io.h
*/

#ifndef _ALT_BPP_IO_H
#define _ALT_BPP_IO_H

struct bpp_pins {
   uint8_t output_reg_pins;        /* pins in P_OR register */
   uint8_t input_reg_pins;         /* pins in P_IR register */
};

struct bpp_switches {
   int32_t xend;  /* Switch 1 / PE pin state (really bool) */
   int32_t yend;  /* Switch 2 / SLCT pin state  (really bool) */
};

struct bpp_delta {
   int32_t x;  /* X displacement (-1, 0, +1) */
   int32_t y;  /* Y displacement (-1, 0, +1) */
};

#define BPPIOC  ('b' << 8)
#define BPPIOC_SETOUTPINS  (BPPIOC |  3) /* set contents of pins structure   */
#define BPPIOC_GETOUTPINS  (BPPIOC |  4) /* read contents of pins structure  */
#define BPPIOC_STEP        (BPPIOC |  7) /* advance bit patterns */
#define BPPIOC_GETSWITCHES (BPPIOC |  8) /* read switch state structure  */
#define BPPIOC_GETREGS     (BPPIOC |  9) /* messy: complete register dump    */
#define BPPIOC_SETRAWDATA  (BPPIOC | 13) /* shove value into data register   */
#define BPPIOC_GETRAWDATA  (BPPIOC | 14) /* read directly from data register */

#endif

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