Revision as of 10:21, 10 January 2015

I2C

Defination	void I2C_Init()
Input Arguments	none
Return Value	none
Description	This function is used to initialize the I2C module.
Usage	I2C_Init();

Defination	void I2C_Start()
Input Arguments	none
Return Value	none
Description	This function is used to generate I2C Start Condition. Start Condition: SDA goes low when SCL is High.
Usage	I2C_Start();

Defination	void I2C_Stop()
Input Arguments	none
Return Value	none
Description	This function is used to generate I2C Stop Condition. Stop Condition: SDA goes High when SCL is High.
Usage	I2C_Stop();

Defination	void I2C_Write(uint8_t var_i2cData_u8)
Input Arguments	uint8_t : 8-bit data to be transmitted.
Return Value	none
Description	This function is used to send a byte on SDA line using I2C protocol. 8bit data is sent bit-by-bit on each clock cycle. MSB(bit) is sent first and LSB(bit) is sent at last.
Usage	I2C_Write(0x05); //transmits 0x05 on I2C lines I2C_Write(var_i2cData_u8); //Transmits 8bit data stored in var_i2cData_u8

Defination	uint8_t I2C_Read(uint8_t var_ackOption_u8)
Input Arguments	uint8_t: Acknowledgement to be sent after data reception. 1:Positive acknowledgement 0:Negative acknowledgement
Return Value	uint8_t: Data received form I2C lines.
Description	This fun is used to receive a byte on SDA line using I2C protocol.
Usage	void mian() { ptr_sec_u8 = I2C_Read(1); // read second and return Positive ACK ptr_min_u8 = I2C_Read(1); // read minute and return Positive ACK *ptr_hour_u8 = I2C_Read(0); // read hour and return Negative/No ACK }

@@ Line 93: / Line 93: @@
 {
      *ptr_sec_u8 = I2C_Read(1);                // read second and return Positive ACK
-     *ptr_min_u8 = I2C_Read(1); 	          // read minute and return Positive ACK
+     *ptr_min_u8 = I2C_Read(1); 	             // read minute and return Positive ACK
      *ptr_hour_u8 = I2C_Read(0);              // read hour and return Negative/No ACK
 }