Instructions

273 C-Control Pro IDE
© 2013 Conrad Electronic
40
SLA+R has been sent, ACK has been received
48
SLA+R has been sent, NACK has been received
50
Data byte has been sent, ACK has been received
58
Data byte has been sent, NACK has been received
5.12.1.9 I2C Example
Example: read EEPROM 24C64 and write without I2C_Status check
// I2C Initialization, Bit Rate 100kHz
main(void)
{
word address;
byte data,EEPROM_data;
address=0x20;
data=0x42;
I2C_Init(I2C_100kHz );
// write data to 24C64 (8k x 8) EEPROM
I2C_Start();
I2C_Write(0xA0); // DEVICE ADDRESS : A0
I2C_Write(address>>8); // HIGH WORD ADDRESS
I2C_Write(address); // LOW WORD ADDRESS
I2C_Write(data); // write Data
I2C_Stop();
AbsDelay(5); // delay for EEPROM Write Cycle
// read data from 24C64 (8k x 8) EEPROM
I2C_Start();
I2C_Write(0xA0); // DEVICE ADDRESS : A0
I2C_Write(address>>8); // HIGH WORD ADDRESS
I2C_Write(address); // LOW WORD ADDRESS
I2C_Start(); // RESTART
I2C_Write(0xA1); // DEVICE ADDRESS : A1
EEPROM_data=I2C_Read_NACK();
I2C_Stop();
Msg_WriteHex(EEPROM_data);
}
5.12.2 AVR32Bit