Operácie

Zbernica i2c: Rozdiel medzi revíziami

Z SensorWiki

Riadok 21: Riadok 21:
 
     unsigned char ret;
 
     unsigned char ret;
  
     i2c_init();                            // initialize I2C library
+
     state = i2c_init();                            // initialize I2C library
 +
      if (state != 0) call_error(state);
  
 
     // read value from EEPROM address 5  
 
     // read value from EEPROM address 5  

Verzia zo dňa a času 10:09, 6. december 2012

K. Zbernica i2c: EEPROM

Prečítajte obsah predloženej pamäti EEPROM a zobrazte na PC.

I2c M24C02.jpg

Literatúra:


 #define Dev24C02  0xA2      // device address of EEPROM 24C02, see datasheet

 int main(void)
 {
     unsigned char ret;

     state = i2c_init();                             // initialize I2C library
      if (state != 0) call_error(state);

     // read value from EEPROM address 5 
     i2c_start_wait(Dev24C02+I2C_WRITE);     // set device address and write mode

     i2c_write(0x05);                        // write address = 5
     i2c_rep_start(Dev24C02+I2C_READ);       // set device address and read mode

     ret = i2c_readNak();                    // read one byte from EEPROM
     i2c_stop();

     for(;;);
 }