keyboard/hhkb/rn42/rn42.c

   1 #include <avr/io.h>
   2 #include "host.h"
   3 #include "host_driver.h"
   4 #include "serial.h"
   5 #include "rn42.h"
   6 #include "print.h"
   7 #include "timer.h"
   8 #include "wait.h"
   9
  10
  11 /* Host driver */
  12 static uint8_t keyboard_leds(void);
  13 static void send_keyboard(report_keyboard_t *report);
  14 static void send_mouse(report_mouse_t *report);
  15 static void send_system(uint16_t data);
  16 static void send_consumer(uint16_t data);
  17
  18 host_driver_t rn42_driver = {
  19     keyboard_leds,
  20     send_keyboard,
  21     send_mouse,
  22     send_system,
  23     send_consumer
  24 };
  25
  26
  27 void rn42_init(void)
  28 {
  29     // JTAG disable for PORT F. write JTD bit twice within four cycles.
  30     MCUCR |= (1<<JTD);
  31     MCUCR |= (1<<JTD);
  32
  33     // PF7: BT connection control(high: connect, low: disconnect)
  34     rn42_autoconnect();
  35
  36     // PF6: linked(input without pull-up)
  37     DDRF  &= ~(1<<6);
  38     PORTF |=  (1<<6);
  39
  40     // PF1: RTS(low: allowed to send, high: not allowed)
  41     DDRF &= ~(1<<1);
  42     PORTF &= ~(1<<1);
  43
  44     // PD5: CTS(low: allow to send, high:not allow)
  45     DDRD |= (1<<5);
  46     PORTD &= ~(1<<5);
  47
  48     serial_init();
  49 }
  50
  51 int16_t rn42_getc(void)
  52 {
  53     return serial_recv2();
  54 }
  55
  56 const char *rn42_gets(uint16_t timeout)
  57 {
  58     static char s[24];
  59     uint16_t t = timer_read();
  60     uint8_t i = 0;
  61     int16_t c;
  62     while (i < 23 && timer_elapsed(t) < timeout) {
  63         if ((c = rn42_getc()) != -1) {
  64             if ((char)c == '\r') continue;
  65             if ((char)c == '\n') break;
  66             s[i++] = c;
  67         }
  68     }
  69     s[i] = '\0';
  70     return s;
  71 }
  72
  73 void rn42_putc(uint8_t c)
  74 {
  75     serial_send(c);
  76 }
  77
  78 void rn42_puts(char *s)
  79 {
  80     while (*s)
  81         serial_send(*s++);
  82 }
  83
  84 bool rn42_autoconnecting(void)
  85 {
  86     // GPIO6 for control connection(high: auto connect, low: disconnect)
  87     // Note that this needs config: SM,4(Auto-Connect DTR Mode)
  88     return (PORTF & (1<<7) ? true : false);
  89 }
  90
  91 void rn42_autoconnect(void)
  92 {
  93     // hi to auto connect
  94     DDRF |= (1<<7);
  95     PORTF |= (1<<7);
  96 }
  97
  98 void rn42_disconnect(void)
  99 {
 100     // low to disconnect
 101     DDRF |= (1<<7);
 102     PORTF &= ~(1<<7);
 103 }
 104
 105 bool rn42_rts(void)
 106 {
 107     // low when RN-42 is powered and ready to receive
 108     return PINF&(1<<1);
 109 }
 110
 111 void rn42_cts_hi(void)
 112 {
 113     // not allow to send
 114     PORTD |= (1<<5);
 115 }
 116
 117 void rn42_cts_lo(void)
 118 {
 119     // allow to send
 120     PORTD &= ~(1<<5);
 121 }
 122
 123 bool rn42_linked(void)
 124 {
 125     // RN-42 GPIO2
 126     //   Hi-Z:  Not powered
 127     //   High:  Linked
 128     //   Low:   Connecting
 129     return PINF&(1<<6);
 130 }
 131
 132
 133 static uint8_t leds = 0;
 134 static uint8_t keyboard_leds(void) { return leds; }
 135 void rn42_set_leds(uint8_t l) { leds = l; }
 136
 137 static void send_keyboard(report_keyboard_t *report)
 138 {
 139     // wake from deep sleep
 140 /*
 141     PORTD |= (1<<5);    // high
 142     wait_ms(5);
 143     PORTD &= ~(1<<5);   // low
 144 */
 145
 146     serial_send(0xFD);  // Raw report mode
 147     serial_send(9);     // length
 148     serial_send(1);     // descriptor type
 149     serial_send(report->mods);
 150     serial_send(0x00);
 151     serial_send(report->keys[0]);
 152     serial_send(report->keys[1]);
 153     serial_send(report->keys[2]);
 154     serial_send(report->keys[3]);
 155     serial_send(report->keys[4]);
 156     serial_send(report->keys[5]);
 157 }
 158
 159 static void send_mouse(report_mouse_t *report)
 160 {
 161     // wake from deep sleep
 162 /*
 163     PORTD |= (1<<5);    // high
 164     wait_ms(5);
 165     PORTD &= ~(1<<5);   // low
 166 */
 167
 168     serial_send(0xFD);  // Raw report mode
 169     serial_send(5);     // length
 170     serial_send(2);     // descriptor type
 171     serial_send(report->buttons);
 172     serial_send(report->x);
 173     serial_send(report->y);
 174     serial_send(report->v);
 175 }
 176
 177 static void send_system(uint16_t data)
 178 {
 179     // Table 5-6 of RN-BT-DATA-UB
 180     // 81,82,83 scan codes can be used?
 181 }
 182
 183
 184 static uint16_t usage2bits(uint16_t usage)
 185 {
 186     switch (usage) {
 187         case AC_HOME:               return 0x01;
 188         case AL_EMAIL:              return 0x02;
 189         case AC_SEARCH:             return 0x04;
 190         //case AL_KBD_LAYOUT:         return 0x08;  // Apple virtual keybaord toggle
 191         case AUDIO_VOL_UP:          return 0x10;
 192         case AUDIO_VOL_DOWN:        return 0x20;
 193         case AUDIO_MUTE:            return 0x40;
 194         case TRANSPORT_PLAY_PAUSE:  return 0x80;
 195         case TRANSPORT_NEXT_TRACK:  return 0x100;
 196         case TRANSPORT_PREV_TRACK:  return 0x200;
 197         case TRANSPORT_STOP:        return 0x400;
 198         case TRANSPORT_STOP_EJECT:  return 0x800;
 199         //case return 0x1000;   // Fast forward
 200         //case return 0x2000;   // Rewind
 201         //case return 0x4000;   // Stop/eject
 202         //case return 0x8000;   // Internet browser
 203     };
 204     return 0;
 205 }
 206
 207 static void send_consumer(uint16_t data)
 208 {
 209     uint16_t bits = usage2bits(data);
 210     serial_send(0xFD);  // Raw report mode
 211     serial_send(3);     // length
 212     serial_send(3);     // descriptor type
 213     serial_send(bits&0xFF);
 214     serial_send((bits>>8)&0xFF);
 215 }
 216
 217
 218 /* Null driver for config_mode */
 219 static uint8_t config_keyboard_leds(void);
 220 static void config_send_keyboard(report_keyboard_t *report);
 221 static void config_send_mouse(report_mouse_t *report);
 222 static void config_send_system(uint16_t data);
 223 static void config_send_consumer(uint16_t data);
 224
 225 host_driver_t rn42_config_driver = {
 226     config_keyboard_leds,
 227     config_send_keyboard,
 228     config_send_mouse,
 229     config_send_system,
 230     config_send_consumer
 231 };
 232
 233 static uint8_t config_keyboard_leds(void) { return leds; }
 234 static void config_send_keyboard(report_keyboard_t *report) {}
 235 static void config_send_mouse(report_mouse_t *report) {}
 236 static void config_send_system(uint16_t data) {}
 237 static void config_send_consumer(uint16_t data) {}