git.zerfleddert.de Git - fhem-stuff/blob - culfw/culfw-asksin-fix.diff

   1 Index: clib/rf_asksin.c
   2 ===================================================================
   3 --- clib/rf_asksin.c    (revision 373)
   4 +++ clib/rf_asksin.c    (working copy)
   5 @@ -9,15 +9,18 @@
   6
   7  #include "rf_asksin.h"
   8
   9 +//we receive a new byte approximately every 7 ms...
  10 +#define RX_TIMEOUT_MS 10
  11 +
  12  uint8_t asksin_on = 0;
  13
  14 -const uint8_t PROGMEM ASKSIN_CFG[50] = {
  15 -     0x00, 0x07,
  16 +const uint8_t PROGMEM ASKSIN_CFG[] = {
  17 +     0x00, 0x01,
  18       0x02, 0x2e,
  19       0x03, 0x0d,
  20       0x04, 0xE9,
  21       0x05, 0xCA,
  22 -     0x07, 0x0C,
  23 +     0x07, 0x04,
  24       0x0B, 0x06,
  25       0x0D, 0x21,
  26       0x0E, 0x65,
  27 @@ -26,18 +29,22 @@
  28       0x11, 0x93,
  29       0x12, 0x03,
  30       0x15, 0x34,
  31 -     0x17, 0x30, // always go into IDLE
  32 +     0x17, 0x3F, // always go into RX, CCA; ELV uses 0x03
  33       0x18, 0x18,
  34       0x19, 0x16,
  35       0x1B, 0x43,
  36       0x21, 0x56,
  37       0x25, 0x00,
  38       0x26, 0x11,
  39 +     0x29, 0x59,
  40 +     0x2c, 0x81,
  41       0x2D, 0x35,
  42 -     0x3e, 0xc3,
  43 -     0xff
  44 +     0x3e, 0xc3
  45  };
  46
  47 +static inline uint8_t read_cc1100_rxbytes(void);
  48 +static void rf_asksin_reset_rx(void);
  49 +
  50  void
  51  rf_asksin_init(void)
  52  {
  53 @@ -56,20 +63,44 @@
  54    my_delay_us(100);
  55
  56    // load configuration
  57 -  for (uint8_t i = 0; i<50; i += 2) {
  58 -
  59 -    if (pgm_read_byte( &ASKSIN_CFG[i] )>0x40)
  60 -      break;
  61 -
  62 +  for (uint8_t i = 0; i < sizeof(ASKSIN_CFG); i += 2) {
  63      cc1100_writeReg( pgm_read_byte(&ASKSIN_CFG[i]),
  64                       pgm_read_byte(&ASKSIN_CFG[i+1]) );
  65    }
  66
  67    ccStrobe( CC1100_SCAL );
  68
  69 -  my_delay_ms(1);
  70 +  my_delay_ms(4);
  71 +
  72 +  ccRX();
  73  }
  74
  75 +// Workaround for CC1101 Errata 3
  76 +static inline uint8_t
  77 +read_cc1100_rxbytes(void)
  78 +{
  79 +  uint8_t rxbytes, rxbytes2;
  80 +
  81 +  rxbytes = cc1100_readReg(CC1100_RXBYTES);
  82 +  while((rxbytes2 = cc1100_readReg(CC1100_RXBYTES)) != rxbytes)
  83 +    rxbytes = rxbytes2;
  84 +
  85 +  return rxbytes;
  86 +}
  87 +
  88 +static void
  89 +rf_asksin_reset_rx(void)
  90 +{
  91 +  ccStrobe( CC1100_SFRX  );
  92 +  ccStrobe( CC1100_SIDLE );
  93 +  ccStrobe( CC1100_SNOP  );
  94 +
  95 +  while (read_cc1100_rxbytes() & 0x7f)
  96 +    cc1100_readReg(CC1100_RXFIFO);
  97 +
  98 +  ccStrobe( CC1100_SRX   );
  99 +}
 100 +
 101  void
 102  rf_asksin_task(void)
 103  {
 104 @@ -77,18 +108,51 @@
 105    uint8_t dec[MAX_ASKSIN_MSG];
 106    uint8_t rssi;
 107    uint8_t l;
 108 +  uint8_t rxfifo_cnt;
 109 +  uint16_t timeout;
 110
 111    if(!asksin_on)
 112      return;
 113
 114 -  // see if a CRC OK pkt has been arrived
 115 -  if (bit_is_set( CC1100_IN_PORT, CC1100_IN_PIN )) {
 116 +  // see if there is data to be read
 117 +  while (bit_is_set( CC1100_IN_PORT, CC1100_IN_PIN )) {
 118 +    rxfifo_cnt = read_cc1100_rxbytes();
 119
 120 +    if (rxfifo_cnt & 0x80) // Overflow
 121 +      break;
 122 +
 123 +    rxfifo_cnt &= 0x7f;
 124 +
 125      enc[0] = cc1100_readReg( CC1100_RXFIFO ) & 0x7f; // read len
 126 +    rxfifo_cnt--;
 127
 128 -    if (enc[0]>=MAX_ASKSIN_MSG)
 129 -         enc[0] = MAX_ASKSIN_MSG-1;
 130 -
 131 +    if (enc[0] >= MAX_ASKSIN_MSG) {
 132 +      // Something went horribly wrong, out of sync?
 133 +      rf_asksin_reset_rx();
 134 +      return;
 135 +    }
 136 +
 137 +    if ((enc[0] + 2) > rxfifo_cnt) {
 138 +      timeout = RX_TIMEOUT_MS * ((enc[0] + 2) - rxfifo_cnt);
 139 +      while (timeout-- && ((enc[0] + 2) > rxfifo_cnt)) { // Wait for more data
 140 +        my_delay_ms(1);
 141 +        rxfifo_cnt = read_cc1100_rxbytes();
 142 +
 143 +        if (rxfifo_cnt & 0x80) { // Overflow
 144 +          rf_asksin_reset_rx();
 145 +          return;
 146 +       }
 147 +
 148 +        rxfifo_cnt &= 0x7f;
 149 +      }
 150 +
 151 +      if (!timeout) {
 152 +        // Not enough data received, out of sync?
 153 +        rf_asksin_reset_rx();
 154 +        return;
 155 +      }
 156 +    }
 157 +
 158      CC1100_ASSERT;
 159      cc1100_sendbyte( CC1100_READ_BURST | CC1100_RXFIFO );
 160
 161 @@ -97,14 +161,19 @@
 162      }
 163
 164      rssi = cc1100_sendbyte( 0 );
 165 -
 166 +
 167      CC1100_DEASSERT;
 168
 169 -    ccStrobe( CC1100_SFRX  );
 170 -    ccStrobe( CC1100_SIDLE );
 171 -    ccStrobe( CC1100_SNOP  );
 172 -    ccStrobe( CC1100_SRX   );
 173 +    // We must not read the last byte from the RX fifo while RX is in progress (Errata 1)
 174 +    while (((read_cc1100_rxbytes() & 0x7f) == 1) && (cc1100_readReg(CC1100_PKTSTATUS) & (1 << 3))) {
 175 +      my_delay_ms(1);
 176 +    }
 177
 178 +    l = cc1100_readReg(CC1100_RXFIFO);
 179 +
 180 +    if (!(l & 0x80)) // CRC not ok
 181 +      continue;
 182 +
 183      dec[0] = enc[0];
 184      dec[1] = (~enc[1]) ^ 0x89;
 185
 186 @@ -113,7 +182,6 @@
 187
 188      dec[l] = enc[l] ^ dec[2];
 189
 190 -
 191      if (tx_report & REP_BINTIME) {
 192
 193        DC('a');
 194 @@ -131,26 +199,17 @@
 195
 196        DNL();
 197      }
 198 +  }
 199
 200 -    return;
 201 -
 202 +  switch(cc1100_readReg( CC1100_MARCSTATE )) {
 203 +    case MARCSTATE_RXFIFO_OVERFLOW:
 204 +      ccStrobe( CC1100_SFRX  );
 205 +    case MARCSTATE_IDLE:
 206 +      ccStrobe( CC1100_SIDLE );
 207 +      ccStrobe( CC1100_SNOP  );
 208 +      ccStrobe( CC1100_SRX   );
 209 +      break;
 210    }
 211 -
 212 -
 213 -  switch (cc1100_readReg( CC1100_MARCSTATE )) {
 214 -
 215 -       // RX_OVERFLOW
 216 -  case 17:
 217 -       // IDLE
 218 -  case 1:
 219 -    ccStrobe( CC1100_SFRX  );
 220 -    ccStrobe( CC1100_SIDLE );
 221 -    ccStrobe( CC1100_SNOP  );
 222 -    ccStrobe( CC1100_SRX   );
 223 -    break;
 224 -
 225 -  }
 226 -
 227  }
 228
 229  void
 230 @@ -173,20 +232,7 @@
 231      my_delay_ms(3);             // 3ms: Found by trial and error
 232    }
 233
 234 -  ccStrobe(CC1100_SIDLE);
 235 -  ccStrobe(CC1100_SFRX );
 236 -  ccStrobe(CC1100_SFTX );
 237 -
 238 -  if (dec[2] & (1 << 4)) { //BURST-bit set?
 239 -    ccStrobe(CC1100_STX  ); //We need to send a burst
 240 -
 241 -    //According to ELV, devices get activated every 300ms, so send burst for 360ms
 242 -    for(l = 0; l < 3; l++)
 243 -      my_delay_ms(120); //arg is uint_8, so loop
 244 -  }
 245 -
 246    // "crypt"
 247 -
 248    enc[0] = dec[0];
 249    enc[1] = (~dec[1]) ^ 0x89;
 250
 251 @@ -195,6 +241,15 @@
 252
 253    enc[l] = dec[l] ^ dec[2];
 254
 255 +  ccTX();
 256 +  if (dec[2] & (1 << 4)) { // BURST-bit set?
 257 +    // According to ELV, devices get activated every 300ms, so send burst for 360ms
 258 +    for(l = 0; l < 3; l++)
 259 +      my_delay_ms(120); // arg is uint_8, so loop
 260 +  } else {
 261 +       my_delay_ms(10);
 262 +  }
 263 +
 264    // send
 265    CC1100_ASSERT;
 266    cc1100_sendbyte(CC1100_WRITE_BURST | CC1100_TXFIFO);
 267 @@ -205,12 +260,17 @@
 268
 269    CC1100_DEASSERT;
 270
 271 -  ccStrobe( CC1100_SFRX  );
 272 -  ccStrobe( CC1100_STX   );
 273 +  // wait for TX to finish
 274 +  while(cc1100_readReg( CC1100_MARCSTATE ) == MARCSTATE_TX)
 275 +    ;
 276 +
 277 +  if (cc1100_readReg( CC1100_MARCSTATE ) == MARCSTATE_TXFIFO_UNDERFLOW) {
 278 +      ccStrobe( CC1100_SFTX  );
 279 +      ccStrobe( CC1100_SIDLE );
 280 +      ccStrobe( CC1100_SNOP  );
 281 +      ccStrobe( CC1100_SRX   );
 282 +  }
 283
 284 -  while( cc1100_readReg( CC1100_MARCSTATE ) != 1 )
 285 -    my_delay_ms(5);
 286 -
 287    if(asksin_on) {
 288      ccRX();
 289    } else {