avr/c64tape.h

   1 /*
   2  * Copyright (C) 2007 Anton Blad
   3  * Copyright (C) 2007 Fredrik Kuivinen
   4  * Copyright (C) 2007 Jakob Rosén
   5  *
   6  * This file is licensed under GPL v2.
   7  */
   8
   9 #ifndef C64TAPE_H
  10 #define C64TAPE_H
  11
  12 #include <avr/io.h>
  13
  14 // Pin definitions for C64 and TAPE interfaces.
  15
  16 // For dev-trut:
  17 // MOTOR on PB6
  18 // C64READ on PC6
  19 // C64WRITE on PD1
  20 // C64SENSE on PC2
  21 // TAPEREAD on PD0
  22 // TAPEWRITE on PC5
  23 // TAPESENSE on PC4
  24 // RSIG on PC7 (Multiplexed input of TAPEREAD and C64WRITE)
  25 // RSIGSEL on PB5 (Control signal for RSIG multiplexer)
  26
  27 // For usbkey:
  28 // MOTOR on PB0
  29 // C64READ on PB5
  30
  31 #if HWBOARD==DEVTRUT
  32
  33 #define DDR_MOTOR DDRB
  34 #define PORT_MOTOR PORTB
  35 #define PIN_MOTOR PINB
  36 #define P_MOTOR 6
  37
  38 #define DDR_C64READ DDRC
  39 #define PORT_C64READ PORTC
  40 #define PIN_C64READ PINC
  41 #define P_C64READ 6
  42
  43 #define DDR_C64WRITE DDRD
  44 #define PORT_C64WRITE PORTD
  45 #define PIN_C64WRITE PIND
  46 #define P_C64WRITE 1
  47
  48 #define DDR_C64SENSE DDRC
  49 #define PORT_C64SENSE PORTC
  50 #define PIN_C64SENSE PINC
  51 #define P_C64SENSE 2
  52
  53 #define DDR_TAPEREAD DDRD
  54 #define PORT_TAPEREAD PORTD
  55 #define PIN_TAPEREAD PIND
  56 #define P_TAPEREAD 0
  57
  58 #define DDR_TAPEWRITE DDRC
  59 #define PORT_TAPEWRITE PORTC
  60 #define PIN_TAPEWRITE PINC
  61 #define P_TAPEWRITE 5
  62
  63 #define DDR_TAPESENSE DDRC
  64 #define PORT_TAPESENSE PORTC
  65 #define PIN_TAPESENSE PINC
  66 #define P_TAPESENSE 4
  67
  68 #define DDR_RSIGSEL DDRB
  69 #define PORT_RSIGSEL PORTB
  70 #define PIN_RSIGSEL PINB
  71 #define P_RSIGSEL 5
  72
  73 #else /* HWBOARD==DEVTRUT */
  74
  75 #define DDR_MOTOR DDRB
  76 #define PORT_MOTOR PORTB
  77 #define PIN_MOTOR PINB
  78 #define P_MOTOR 0
  79
  80 #define DDR_C64READ DDRB
  81 #define PORT_C64READ PORTB
  82 #define PIN_C64READ PINB
  83 #define P_C64READ 5
  84
  85 #endif
  86
  87 void c64tape_init();
  88
  89 #define RSIG_C64 0
  90 #define RSIG_TAPE 1
  91
  92 #if HWBOARD==DEVTRUT
  93 static inline void c64read_on() { PORT_C64READ |= _BV(P_C64READ); }
  94 static inline void c64read_off() { PORT_C64READ &= ~(_BV(P_C64READ)); }
  95
  96 static inline void c64sense_on() { PORT_C64SENSE &= ~(1 << P_C64SENSE); }
  97 static inline void c64sense_off() { PORT_C64SENSE |= (1 << P_C64SENSE); }
  98
  99 static inline uint8_t c64write_ison()
 100 {
 101         return (PIN_C64WRITE & _BV(P_C64WRITE));
 102 }
 103
 104 static inline uint8_t taperead_ison()
 105 {
 106         return (PIN_TAPEREAD & _BV(P_TAPEREAD));
 107 }
 108
 109 static inline uint8_t tapesense_ison()
 110 {
 111         return !(PIN_TAPESENSE & _BV(P_TAPESENSE));
 112 }
 113
 114 static inline void tapewrite_on() { PORT_TAPEWRITE |= _BV(P_TAPEWRITE); }
 115 static inline void tapewrite_off() { PORT_TAPEWRITE &= ~(_BV(P_TAPEWRITE)); }
 116
 117
 118 static inline void rsig(uint8_t sel)
 119 {
 120         if(sel == RSIG_C64)
 121                 PORT_RSIGSEL &= ~(_BV(P_RSIGSEL));
 122         else
 123                 PORT_RSIGSEL |= _BV(P_RSIGSEL);
 124 }
 125
 126 #else
 127 static inline void c64sense_on() { }
 128 static inline void c64sense_off() { }
 129 #endif
 130
 131 #endif