C++ (Cpp) writeMR Exemples

Exemple #1

Fichier : w5100.cpp Projet : ADTL/W5200-Ethernet-Shield

void W5100Class::init(void)
{
  delay(300);

  SPI.begin(SPI_CS);
  
  #ifdef W5200

  // more initila delay is required
  delay(200);

  // should be ok with no divider, W5200 support 80Mhz and SAM3X8E is cadenced to 84Mhz..
  // Set clock to 84Mhz but this setting NOT work: SPI clock shaping is not good.
  // SPI.setClockDivider(SPI_CS, 1); 
  
  // Set clock to 42Mhz 
  SPI.setClockDivider(SPI_CS, 2); 
 
  #else
  // Set clock to 4Mhz (W5100 should support up to 14Mhz)
  SPI.setClockDivider(SPI_CS, 21);
  #endif
  
  SPI.setDataMode(SPI_CS, SPI_MODE0);
  writeMR(1<<RST);
  
  #ifdef W5200
  for (int i=0; i<MAX_SOCK_NUM; i++) {
    write((0x4000 + i * 0x100 + 0x001F), 2);
    write((0x4000 + i * 0x100 + 0x001E), 2);
  }
  #else
  writeTMSR(0x55);
  writeRMSR(0x55);
  #endif

  for (int i=0; i<MAX_SOCK_NUM; i++) {
    SBASE[i] = TXBUF_BASE + SSIZE * i;
    RBASE[i] = RXBUF_BASE + RSIZE * i;
  }
}

Exemple #2

Fichier : w5100.cpp Projet : gallegojm/LaRocola

void W5100Class::init(void)
{
  delay(300);

  SPI.begin(SPI_CS);
  
  #ifdef W5200
  // should be ok with no divider, W5200 support 80Mhz and SAM3X8E is cadenced to 84Mhz..
  //have tried with webserver sample and it's ok but require more tests
  
  // Set clock to 42Mhz (W5200 should support up to 80Mhz)
  SPI.setClockDivider(SPI_CS, 2);
  // Set clock to 4Mhz
  // SPI.setClockDivider(SPI_CS, 21);
  #else
  // Set clock to 4Mhz (W5100 should support up to 14Mhz)
  SPI.setClockDivider(SPI_CS, 21);
  #endif
  
  SPI.setDataMode(SPI_CS, SPI_MODE0);
  writeMR(1<<RST);
  
  #ifdef W5200
  for (int i=0; i<MAX_SOCK_NUM; i++) {
    write((0x4000 + i * 0x100 + 0x001F), 2);
    write((0x4000 + i * 0x100 + 0x001E), 2);
  }
  #else
  writeTMSR(0x55);
  writeRMSR(0x55);
  #endif

  for (int i=0; i<MAX_SOCK_NUM; i++) {
    SBASE[i] = TXBUF_BASE + SSIZE * i;
    RBASE[i] = RXBUF_BASE + RSIZE * i;
  }
}