Difference between revisions of "I2C"
| Line 89: | Line 89: | ||
| Description || This fun is used to receive a byte on SDA line using I2C protocol. | | Description || This fun is used to receive a byte on SDA line using I2C protocol. | ||
|- | |- | ||
| − | | Usage || < | + | | Usage || |
| − | + | <syntaxhighlight lang = "c"> | |
| + | void mian() | ||
{ | { | ||
| − | *ptr_sec_u8 = I2C_Read(1); // read second and return Positive ACK | + | *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 | + | *ptr_hour_u8 = I2C_Read(0); // read hour and return Negative/No ACK |
} | } | ||
| − | < | + | </syntaxhighlight> |
|} | |} | ||
| − | |||
| − | |||
==User_Guide== | ==User_Guide== | ||
Revision as of 10:20, 10 January 2015
I2C
I2C_Init
| Defination | void I2C_Init() |
| Input Arguments | none |
| Return Value | none |
| Description | This function is used to initialize the I2C module. |
| Usage | I2C_Init(); |
I2C_Start
| 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(); |
I2C_Stop
| 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(); |
I2C_Write
| 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 |
I2C_Read
| Defination | uint8_t I2C_Read(uint8_t var_ackOption_u8) |
| Input Arguments | uint8_t: Acknowledgement to be sent after data reception.
|
| 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 } |