diff options
| -rwxr-xr-x | i2c.c | 81 |
1 files changed, 38 insertions, 43 deletions
@@ -7,60 +7,55 @@ void I2C_Master_Init(const unsigned long freq_K) //Begin IIC as master
{
- TRISC3 = 1; TRISC4 = 1; //Set SDA and SCL pins as input pins
-
- SSPCON = 0b00101000; //pg84/234
- SSPCON2 = 0b00000000; //pg85/234
-
- //SSPADD = (_XTAL_FREQ/(4*freq_K*100))-1; //Setting Clock Speed pg99/234
- SSPADD = 49;
-
- //SSPSTAT: SMP:CKE:D/!A:P:S:R/!W/:U:BF *U unimplemented read as 0
- SMP = 1; // Disable slew rate
- CKP = 0; // Data transmitted on rising edge of SCK
+ TRISC3 = 1;
+ TRISC4 = 1; //Set SDA and SCL pins as input pins
+
+ SSPCON = 0b00101000; //pg84/234
+ SSPCON2 = 0b00000000; //pg85/234
+
+ //SSPADD = (_XTAL_FREQ/(4*freq_K*100))-1; //Setting Clock Speed pg99/234
+ SSPADD = 49;
+
+ //SSPSTAT: SMP:CKE:D/!A:P:S:R/!W/:U:BF *U unimplemented read as 0
+ SMP = 1; // Disable slew rate
+ CKP = 0; // Data transmitted on rising edge of SCK
}
-void I2C_Master_Wait()
-{
- while ( (SSPCON2 & 0b00011111) || (SSPSTAT & 0b00000100) ) ; //check the bis on registers to make sure the IIC is not in progress
+void I2C_Master_Wait() {
+ while ((SSPCON2 & 0b00011111) || (SSPSTAT & 0b00000100)); //check the bis on registers to make sure the IIC is not in progress
}
-void I2C_Master_Start()
-{
- I2C_Master_Wait(); //Hold the program if I2C is busy
- SEN = 1; //Begin IIC pg85/234
+void I2C_Master_Start() {
+ I2C_Master_Wait(); //Hold the program if I2C is busy
+ SEN = 1; //Begin IIC pg85/234
}
-void I2C_Master_Repeated_Start()
-{
+void I2C_Master_Repeated_Start() {
I2C_Master_Wait();
- RSEN = 1; //Initiate repeated start condition
+ RSEN = 1; //Initiate repeated start condition
}
-void I2C_Master_Stop()
-{
- I2C_Master_Wait(); //Hold the program is I2C is busy
- PEN = 1; //End IIC pg85/234
+void I2C_Master_Stop() {
+ I2C_Master_Wait(); //Hold the program is I2C is busy
+ PEN = 1; //End IIC pg85/234
}
-void I2C_Master_Write(unsigned data)
-{
- I2C_Master_Wait(); //Hold the program is I2C is busy
- SSPBUF = data; //pg82/234
+void I2C_Master_Write(unsigned data) {
+ I2C_Master_Wait(); //Hold the program is I2C is busy
+ SSPBUF = data; //pg82/234
}
-unsigned short I2C_Master_Read(unsigned short ack)
-{
- unsigned short incoming;
- I2C_Master_Wait();
- RCEN = 1;
-
- I2C_Master_Wait();
- incoming = SSPBUF; //get the data saved in SSPBUF
-
- I2C_Master_Wait();
- ACKDT = (ack)?0:1; //check if ack bit received
- ACKEN = 1; //pg 85/234
-
- return incoming;
+unsigned short I2C_Master_Read(unsigned short ack) {
+ unsigned short incoming;
+ I2C_Master_Wait();
+ RCEN = 1;
+
+ I2C_Master_Wait();
+ incoming = SSPBUF; //get the data saved in SSPBUF
+
+ I2C_Master_Wait();
+ ACKDT = (ack) ? 0 : 1; //check if ack bit received
+ ACKEN = 1; //pg 85/234
+
+ return incoming;
}
\ No newline at end of file |