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https://github.com/0ldsk00l/smsplus.git
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57 lines
1.7 KiB
C
57 lines
1.7 KiB
C
#ifndef _PIO_H_
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#define _PIO_H_
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#define SIO_TXFL (1 << 0) /* 1= Transmit buffer full */
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#define SIO_RXRD (1 << 1) /* 1= Receive buffer full */
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#define SIO_FRER (1 << 2) /* 1= Framing error occured */
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#define MAX_DEVICE 2
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#define DEVICE_D0 (1 << 0)
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#define DEVICE_D1 (1 << 1)
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#define DEVICE_D2 (1 << 2)
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#define DEVICE_D3 (1 << 3)
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#define DEVICE_TL (1 << 4)
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#define DEVICE_TR (1 << 5)
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#define DEVICE_TH (1 << 6)
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#define DEVICE_ALL (DEVICE_D0 | DEVICE_D1 | DEVICE_D2 | DEVICE_D3 | DEVICE_TL | DEVICE_TR | DEVICE_TH)
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#define PIN_LVL_LO 0 /* Pin outputs 0V */
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#define PIN_LVL_HI 1 /* Pin outputs +5V */
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#define PIN_DIR_OUT 0 /* Pin is is an active driving output */
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#define PIN_DIR_IN 1 /* Pin is in active-low input mode */
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enum {
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PORT_A = 0, /* I/O port A */
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PORT_B = 1 /* I/O port B */
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};
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enum {
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DEVICE_NONE = 0, /* No peripheral */
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DEVICE_PAD2B = 1, /* Standard 2-button digital joystick/gamepad */
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DEVICE_PADDLE = 2 /* Paddle controller; rotary dial with fire button */
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};
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typedef struct {
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uint8 tr_level[2]; /* TR pin output level */
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uint8 th_level[2]; /* TH pin output level */
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uint8 tr_dir[2]; /* TR pin direction */
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uint8 th_dir[2]; /* TH pin direction */
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} io_state;
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/* Global variables */
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extern io_state io_lut[2][256];
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extern io_state *io_current;
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/* Function prototypes */
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void pio_init(void);
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void pio_reset(void);
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void pio_shutdown(void);
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void system_assign_device(int port, int type);
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void io_lut_init(void);
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void ioctrl_w(uint8 data);
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uint8 input_r(int offset);
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void sio_w(int offset, int data);
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uint8 sio_r(int offset);
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#endif /* _PIO_H_ */
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