Diskuzní fórum Elektro Bastlírny

Kód: Vybrat vše

unsigned char rtc_read_time()      //naplni registry hour,minute,day,month a year aktualnimy daty
{
   unsigned char rtc[17];
   unsigned char tmp;
   unsigned char vychozi_rok;
   if (i2c_start(DevPCF8583+I2C_WRITE)) return 1;        //if RTC not accesible return 1
   i2c_write(0);   //control/status register
   i2c_write(0b01000000);      //uloz data v RTC do LATCH registru pro cteni
   i2c_stop();
   i2c_start_wait(DevPCF8583+I2C_WRITE);     // set device address and write mode
   i2c_write(0);                     //nastav registr na adresu 0
   i2c_start_wait(DevPCF8583+I2C_READ);     // set device address and read mode
   for (unsigned char i=0;i<17;i++)
   {
      if (i<16) rtc[i] = i2c_readAck();                    // read byte from EEPROM
      else rtc[i] = i2c_readNak();                    // read last byte from EEPROM
   } 
   i2c_stop();
   i2c_start_wait(DevPCF8583+I2C_WRITE);     // set device address and write mode
   i2c_write(0);   //control/status register
   i2c_write(0b00000000);      //count
   i2c_stop();
...
...
   return 0;
}