Zbernica i2c: Rozdiel medzi revíziami
Z SensorWiki
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i2c_init(); // initialize I2C library | i2c_init(); // initialize I2C library | ||
| − | + | // read value from EEPROM address 5 | |
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| − | // read | ||
i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode | i2c_start_wait(Dev24C02+I2C_WRITE); // set device address and write mode | ||
Verzia zo dňa a času 10:07, 6. december 2012
K. Zbernica i2c: EEPROM
Prečítajte obsah predloženej pamäti EEPROM a zobrazte na PC.
Literatúra:
- M24C02 Datasheet
- Mitchell Kahn: Programming the i2c interface. Dr. Dobb's Journal, June 1992.
- Example using the two-wire interface (TWI). AVRlibc demo projects.
#define Dev24C02 0xA2 // device address of EEPROM 24C02, see datasheet
int main(void)
{
unsigned char ret;
i2c_init(); // initialize I2C library
// 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(;;);
}