unsigned char rtc_get_time (unsigned char address)
{
unsigned char time;
StartI2C();
WriteI2C(0xD0);
WriteI2C(address);
RestartI2C();
WriteI2C(0xD1);
time = ReadI2C();
return (((time & 0xF0) >> 4) * 10) + (time & 0x0F); // BCD to decimal
}
/*********************************************************************
* Function: XEE_RESULT XEEIsBusy(unsigned char control)
*
* PreCondition: XEEInit() is already called.
*
* Input: control - EEPROM control and address code.
*
* Output: XEE_READY if EEPROM is not busy
* XEE_BUSY if EEPROM is busy
* other value if failed.
*
* Side Effects: None
*
* Overview: Requests ack from EEPROM.
*
* Note: None
********************************************************************/
XEE_RESULT XEEIsBusy(unsigned char control)
{
XEE_RESULT r;
IdleI2C(); // ensure module is idle
StartI2C(); // initiate START condition
while ( EEPROM_SPICON2bits.SEN ); // wait until start condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
{
return XEE_BUS_COLLISION; // return with Bus Collision error
}
else
{
if ( WriteI2C( control ) ) // write byte - R/W bit should be 0
return XEE_BUS_COLLISION; // set error for write collision
IdleI2C(); // ensure module is idle
if ( PIR2bits.BCLIF ) // test for bus collision
return XEE_BUS_COLLISION; // return with Bus Collision error
if ( !EEPROM_SPICON2bits.ACKSTAT )
r = XEE_READY;
else
r = XEE_BUSY;
#if 0
while ( EEPROM_SPICON2bits.ACKSTAT ) // test for ACK condition received
{
RestartI2C(); // initiate Restart condition
while ( EEPROM_SPICON2bits.RSEN ); // wait until re-start condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
return XEE_BUS_COLLISION; // return with Bus Collision error
if ( WriteI2C( control ) ) // write byte - R/W bit should be 0
return XEE_BUS_COLLISION; // set error for write collision
IdleI2C(); // ensure module is idle
}
#endif
}
StopI2C(); // send STOP condition
while ( EEPROM_SPICON2bits.PEN ); // wait until stop condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
return XEE_BUS_COLLISION; // return with Bus Collision error
return r;
//return XEE_READY; // return with no error
}
unsigned char ITG3200_read(unsigned char reg) {
unsigned char buf;
StartI2C();
WriteI2C(ITG3200_ADDR_WRITE);
WriteI2C(reg);
RestartI2C();
WriteI2C(ITG3200_ADDR_READ);
buf = ReadI2C();
NotAckI2C();
StopI2C();
return buf;
}
char readEEPROMexterna (char endereco)
{
//while(!DataRdyI2C());
IdleI2C();
StartI2C(); IdleI2C();
WriteI2C(0xA0); IdleI2C();
WriteI2C(0x00); IdleI2C(); //HB
WriteI2C(endereco); IdleI2C();
RestartI2C(); IdleI2C();
WriteI2C(0xA1); IdleI2C();
value = ReadI2C(); IdleI2C(); //Dados
NotAckI2C(); IdleI2C();
StopI2C();IdleI2C();
return value;
}
/*********************************************************************
* Function: LDSequentialReadI2C()
* Input: ControlByte, address, *rdptr, length.
* Overview: Performs a sequential read of length bytes starting at address
* and places data in array pointed to by *rdptr
********************************************************************/
unsigned int LDSequentialReadI2C(unsigned char ControlByte, unsigned char address, unsigned char *rdptr, unsigned char length)
{
IdleI2C(); //Ensure Module is Idle
StartI2C(); //Initiate start condition
WriteI2C(ControlByte); //write 1 byte
IdleI2C(); //Ensure module is Idle
WriteI2C(address); //Write word address
IdleI2C(); //Ensure module is idle
RestartI2C(); //Generate I2C Restart Condition
WriteI2C(ControlByte | 0x01); //Write 1 byte - R/W bit should be 1 for read
IdleI2C(); //Ensure bus is idle
getsI2C(rdptr, length); //Read in multiple bytes
NotAckI2C(); //Send Not Ack
StopI2C(); //Send stop condition
return(0);
}
/*********************************************************************
* Function: EEAckPolling()
* Input: Control byte.
* Output: Error state.
* Overview: Polls the bus for an Acknowledge from device
********************************************************************/
unsigned int EEAckPolling(unsigned char control)
{
IdleI2C(); //wait for bus Idle
StartI2C(); //Generate Start condition
if(I2C1STATbits.BCL)
{
return(-1); //Bus collision, return
}
else
{
if(WriteI2C(control))
{
return(-3); //error return
}
IdleI2C(); //wait for bus idle
if(I2C1STATbits.BCL)
{
return(-1); //error return
}
while(ACKStatus())
{
RestartI2C(); //generate restart
if(I2C1STATbits.BCL)
{
return(-1); //error return
}
if(WriteI2C(control))
{
return(-3);
}
IdleI2C();
}
}
StopI2C(); //send stop condition
if(I2C1STATbits.BCL)
{
return(-1);
}
return(0);
}
/*********************************************************************
* Function: LDByteReadI2C()
* Input: Control Byte, Address, *Data, Length.
* Overview: Performs a low density read of Length bytes and stores in *Data array
* starting at Address.
********************************************************************/
unsigned int LDByteReadI2C(unsigned char ControlByte, unsigned char Address, unsigned char *Data, unsigned char Length)
{
IdleI2C(); //wait for bus Idle
StartI2C(); //Generate Start Condition
WriteI2C(ControlByte); //Write Control Byte
IdleI2C(); //wait for bus Idle
WriteI2C(Address); //Write start address
IdleI2C(); //wait for bus Idle
RestartI2C(); //Generate restart condition
WriteI2C(ControlByte | 0x01); //Write control byte for read
IdleI2C(); //wait for bus Idle
getsI2C(Data, Length); //read Length number of bytes
NotAckI2C(); //Send Not Ack
StopI2C(); //Generate Stop
}
/*
* Gyro i2c interface, Read/Write
*/
UINT8 Gyro_I2C_R(UINT8 Address)
{
UINT8 Data;
IdleI2C(); //wait for bus Idle
StartI2C(); //Generate Start Condition
WriteI2C(Gyro_MPU6050_Address); //Write Control Byte
IdleI2C(); //wait for bus Idle
WriteI2C(Address); //Write start address
IdleI2C(); //wait for bus Idle
RestartI2C(); //Generate restart condition
WriteI2C(Gyro_MPU6050_Address | 0x01); //Write control byte for read
IdleI2C(); //wait for bus Idle
Data = getI2C(); //read Length number of bytes
NotAckI2C(); //Send Not Ack
StopI2C(); //Generate Stop
return Data;
}
/*********************************************************************
* Function: HDByteReadI2C()
*
* Input: Control Byte, HighAdd, LowAdd, *Data, Length.
*
* Output: None.
*
* Overview: Performs a low density read of Length bytes and stores in *Data array
* starting at Address formed from HighAdd and LowAdd.
*
* Note: None
********************************************************************/
unsigned int HDByteReadI2C(unsigned char ControlByte, unsigned char HighAdd, unsigned char LowAdd, unsigned char *Data, unsigned char Length)
{
IdleI2C(); //Wait for bus Idle
StartI2C(); //Generate Start condition
WriteI2C(ControlByte); //send control byte for write
IdleI2C(); //Wait for bus Idle
WriteI2C(HighAdd); //Send High Address
IdleI2C(); //Wait for bus Idle
WriteI2C(LowAdd); //Send Low Address
IdleI2C(); //Wait for bus Idle
RestartI2C(); //Generate Restart
WriteI2C(ControlByte | 0x01); //send control byte for Read
IdleI2C(); //Wait for bus Idle
getsI2C(Data, Length); //Read Length number of bytes to Data
NotAckI2C(); //send Not Ack
StopI2C(); //Send Stop Condition
return(0);
}
int i2ReadData(char SlaveAddress, unsigned char Address, int Bytes, unsigned char *Dades) {
// Pre: Bytes >= 0; Dades t‚ espai per a NumBytes
// Pre: El bit m‚s baix de Address no t‚ informaci¢ (ser… read o write)
// Post: retorna 0 si tot OK o 1 si hi ha un timeout d'un msegon
// en un ack
IdleI2C(); //wait for bus Idle
StartI2C(); //Generate Start Condition
WriteI2C((SlaveAddress<<1)); //Write Control Byte
IdleI2C(); //wait for bus Idle
WriteI2C(Address); //Write start address
IdleI2C(); //wait for bus Idle
RestartI2C(); //Generate restart condition
WriteI2C((SlaveAddress<<1 | 0x01)); //Write control byte for read
IdleI2C(); //wait for bus Idle
getsI2C(Dades, Bytes); //read Length number of bytes
NotAckI2C(); //Send Not Ack
StopI2C(); //Generate Stop
return 0;
}
void ADXL345_multiByteRead(unsigned char startAddress, char* buffer, unsigned char size) {
#if I2C
unsigned char i;
StartI2C();
WriteI2C(ADXL343_ADDR_WRITE);
WriteI2C(startAddress);
RestartI2C();
WriteI2C(ADXL343_ADDR_READ);
for (i = 0; i < size; i++) {
buffer[i] = ReadI2C(); //keep the clock pulsing
// if not last byte, send ack
// if last byte, send nack
if(i < size-1)
{
AckI2C();
}
else
{
NotAckI2C();
}
}
StopI2C();
#elif SPI
unsigned char tx = (ADXL345_SPI_READ | ADXL345_MULTI_BYTE | (startAddress & 0x3F)); // the &0x3F restricts reading from only the XYZ data registers
unsigned char i;
SPI_CS_PIN = 0; //CS pin low, ie enable chip
Delay1TCY(); // delay at least 5 ns
WriteSPI(tx); //Send address to start reading from.
for (i = 0; i < size; i++) {
buffer[i] = ReadSPI(); //keep the clock pulsing
}
SPI_CS_PIN = 1; //CS pin high, ie disable chip
#endif
}
unsigned char HDByteReadI2C( unsigned char ControlByte, unsigned char HighAdd, unsigned char LowAdd, unsigned char *data, unsigned char length )
{
IdleI2C(); // ensure module is idle
StartI2C(); // initiate START condition
while ( SSPCON2bits.SEN ); // wait until start condition is over
WriteI2C( ControlByte ); // write 1 byte
IdleI2C(); // ensure module is idle
WriteI2C( HighAdd ); // WRITE word address to EEPROM
IdleI2C(); // ensure module is idle
while ( SSPCON2bits.RSEN ); // wait until re-start condition is over
WriteI2C( LowAdd ); // WRITE word address to EEPROM
IdleI2C(); // ensure module is idle
RestartI2C(); // generate I2C bus restart condition
while ( SSPCON2bits.RSEN ); // wait until re-start condition is over
WriteI2C( ControlByte | 0x01 ); // WRITE 1 byte - R/W bit should be 1 for read
IdleI2C(); // ensure module is idle
getsI2C( data, length ); // read in multiple bytes
NotAckI2C(); // send not ACK condition
while ( SSPCON2bits.ACKEN ); // wait until ACK sequence is over
StopI2C(); // send STOP condition
while ( SSPCON2bits.PEN ); // wait until stop condition is over
return ( 0 ); // return with no error
}
unsigned char ADXL345_oneByteRead(unsigned char address) {
unsigned char data = 0;
#if I2C
StartI2C();
WriteI2C(ADXL343_ADDR_WRITE);
WriteI2C(address);
RestartI2C();
WriteI2C(ADXL343_ADDR_READ);
data = ReadI2C();
NotAckI2C();
StopI2C();
return data;
#elif SPI
SPI_CS_PIN = 0; //CS pin low, ie enable chip
Delay1TCY(); // delay at least 5 ns
address = address | ADXL345_SPI_READ;
WriteSPI(address); // read bit, multibyte bit, A5-A0 address
data = ReadSPI();
SPI_CS_PIN = 1; //CS pin high, ie disable chip
Delay1TCY(); // delay at least 5 ns
return data;
#endif
}
void getTemperaturaHumidade (void)
{
unsigned char TEMPL=0, TEMPH=0, HUMIDL=0, HUMIDH=0;
unsigned char DUMMY=0, OP=0, BT=0;
float humidade, temperatura;
char msg[55];
LED_AMAR=1;
//#define StartI2C() SSPCON2bits.SEN=1;while(SSPCON2bits.SEN)
StartI2C(); // ACORDAR DEVICE
__delay_us(16);
WriteI2C(0xB8); // endereco Slave do AM2315
__delay_us(135);
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
// com clock de 4 mhz:
// 10K (100) = 1000 ms
// 1K (100) = 100 ms
// 1K (10) = 10 ms
// 1K (2) = 2 ms
// Delay100TCYx();
__delay_us(25);
RestartI2C(); // REQUISITAR PEDIDO DE BYTES
__delay_us(16);
WriteI2C(0xB8); // endereco Slave do AM2315
__delay_us(60); // manual do AM2315 recomenda minimo de 30us
WriteI2C(0x03); // byte que simboliza a temperatura
__delay_us(60);
WriteI2C(0x00); // start byte para leitura
__delay_us(60);
WriteI2C(0x04); // quantidades de bytes a serem lidos;
//AckI2C();
__delay_us(16);
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
__delay_ms(10); // manual do AM2315 recomenda esperar no minimo 10ms
RestartI2C();
WriteI2C(0xB9); // endereco Slave do AM2315
//AckI2C(); // retirado por nao necessitar (?)
__delay_us(60); // manual do AM2315 recomenda minimo de 30us
IdleI2C();
OP = ReadI2C(); // 1o byte
AckI2C();
IdleI2C();
BT = ReadI2C(); // 2o byte
AckI2C();
IdleI2C();
HUMIDL = ReadI2C(); // 3o byte
AckI2C();
IdleI2C();
HUMIDH = ReadI2C(); // 4o byte
AckI2C();
IdleI2C();
TEMPL = ReadI2C(); // 5o byte
AckI2C();
IdleI2C();
TEMPH = ReadI2C(); // 6o byte
AckI2C();
IdleI2C();
DUMMY = ReadI2C(); // 7o byte
AckI2C();
IdleI2C();
DUMMY = ReadI2C(); // 8 byte
//__delay_us(16);
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
LED_VERM=0;
LED_AMAR=0;
LED_VERD=1;
// Calculos obtidos do exemplo do Arduino
humidade = HUMIDL;
humidade *= 256;
humidade += HUMIDH;
humidade /= 10;
temperatura = TEMPL;
temperatura *= 256;
temperatura += TEMPH;
temperatura /= 10;
/* ou ainda
RH = RHH << 8;
RH |= RHL;
TEMP = TEMPH << 8;
TEMP |= TEMPL;
*/
sprintf (msg, "Temp= %0.2f, Humid= %0.2f .", temperatura, humidade);
while(BusyUSART());
putsUSART(msg);
while(BusyUSART());
putrsUSART("\n\r");
LED_VERD=0;
}
int LCDClearData(BYTE add1)
{
#ifdef _WINDOWS
UNUSED(add1);
#else
BYTE i;
BYTE j;
BYTE data;
BYTE status;
for(j=0;j<7;j++){
LCDSetXY(add1,0,j);
RestartI2C();
IdleI2C();
//****write the address of the device for communication***
data = SSPBUF; //read any previous stored content in buffer to clear buffer full status
do
{
status = WriteI2C( add1 | 0x00 ); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//R/W BIT IS '0' FOR FURTHER WRITE TO SLAVE
do
{
status = WriteI2C(modeLCD_DATA_TILL_STOP); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//***WRITE THE THE DATA TO BE SENT FOR SLAVE***
//write string of data to be transmitted to slave
for (i=0;i<128;i++ ) // transmit data
{
if ( SSP1CON1bits.SSPM3 ) // if Master transmitter then execute the following
{
//temp = putcI2C1 ( *wrptr );
//if (temp ) return ( temp );
if ( WriteI2C1( 0 ) ) // write 1 byte
{
return ( -3 ); // return with write collision error
}
IdleI2C1(); // test for idle condition
if ( SSP1CON2bits.ACKSTAT ) // test received ack bit state
{
return ( -2 ); // bus device responded with NOT ACK
} // terminate putsI2C1() function
}
}
//---TERMINATE COMMUNICATION FROM MASTER SIDE---
IdleI2C();
}
#endif
return 0;
}
void getPressao(void)
{
#define BMP085_ADDRESS 0xEE // I2C address of BMP085
#define P_CORRECTION 1.5 // in mBars - factor to adjust for elevation to match local weather station pressure
// this value for 14' above sea level (in Boca Raton, Florida)
//#define StartI2C() SSPCON2bits.SEN=1;while(SSPCON2bits.SEN)
LED_AMAR=1;
IdleI2C();
StartI2C();
//IdleI2C();
__delay_us(16);
WriteI2C( 0xD0 );
//IdleI2C();
__delay_us(60);
WriteI2C( 0x00 );
IdleI2C();
__delay_us(16);
//AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
//IdleI2C();
__delay_us(26);
RestartI2C();
__delay_us(16);
WriteI2C( 0xD1 );
__delay_us(1);
IdleI2C();
/*
segundo =ReadI2C();
AckI2C();
IdleI2C();
minuto =ReadI2C();
AckI2C();
IdleI2C();
hora =ReadI2C();
AckI2C();
IdleI2C();
diasemana=ReadI2C();
AckI2C();
IdleI2C();
dia =ReadI2C();
AckI2C();
IdleI2C();
mes =ReadI2C();
AckI2C();
IdleI2C();
ano =ReadI2C();
AckI2C();
IdleI2C();
dummy =ReadI2C();
//AckI2C();
//__delay_us(16);
//IdleI2C();
//NotAckI2C();
//IdleI2C();
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
LED_VERM = 0; LED_AMAR=0; LED_VERD=1;
sprintf(msg,"%xh:%xm:%xs _ dia %x/%x/%x _ ",
hora,minuto,segundo,dia,mes,ano);
*/
while(BusyUSART());
// putsUSART( msg );
LED_VERD=0;
}
void getDS1307(void)
{
int hora=0, minuto=0, segundo=0, diasemana=0, dia=0, mes=0, ano=0, dummy=0;
char msg[40];
//#define StartI2C() SSPCON2bits.SEN=1;while(SSPCON2bits.SEN)
LED_AMAR=1;
IdleI2C();
StartI2C();
//IdleI2C();
__delay_us(16);
WriteI2C( 0xD0 );
//IdleI2C();
__delay_us(60);
WriteI2C( 0x00 );
IdleI2C();
__delay_us(16);
//AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();AckI2C();
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
//IdleI2C();
__delay_us(26);
RestartI2C();
__delay_us(16);
WriteI2C( 0xD1 );
__delay_us(1);
IdleI2C();
segundo =ReadI2C();
AckI2C();
IdleI2C();
minuto =ReadI2C();
AckI2C();
IdleI2C();
hora =ReadI2C();
AckI2C();
IdleI2C();
diasemana=ReadI2C();
AckI2C();
IdleI2C();
dia =ReadI2C();
AckI2C();
IdleI2C();
mes =ReadI2C();
AckI2C();
IdleI2C();
ano =ReadI2C();
AckI2C();
IdleI2C();
dummy =ReadI2C();
//AckI2C();
//__delay_us(16);
//IdleI2C();
//NotAckI2C();
//IdleI2C();
StopI2C();
//#define StopI2C() SSPCON2bits.PEN=1;while(SSPCON2bits.PEN)
LED_VERM = 0;
LED_AMAR=0;
LED_VERD=1;
sprintf(msg,"%xh:%xm:%xs _ dia %x/%x/%x _ ",
hora,minuto,segundo,dia,mes,ano);
while(BusyUSART());
putsUSART( msg );
LED_VERD=0;
}
int LCDSendData(BYTE add1,BYTE* wrptr, BYTE size)
{
#ifndef _WINDOWS
BYTE data;
BYTE status;
BYTE i;
BYTE_VAL d;
BYTE_VAL d1;
RestartI2C();
IdleI2C();
//****write the address of the device for communication***
data = SSPBUF; //read any previous stored content in buffer to clear buffer full status
do
{
status = WriteI2C( add1 | 0x00 ); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//R/W BIT IS '0' FOR FURTHER WRITE TO SLAVE
do
{
status = WriteI2C(modeLCD_DATA_TILL_STOP); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//***WRITE THE THE DATA TO BE SENT FOR SLAVE***
//write string of data to be transmitted to slave
for (i=0;i<size;i++ ) // transmit data
{
if ( SSP1CON1bits.SSPM3 ) // if Master transmitter then execute the following
{
//temp = putcI2C1 ( *wrptr );
//if (temp ) return ( temp );
d.Val = *wrptr;
// swapping bits
d1.bits.b0 = d.bits.b7;
d1.bits.b1 = d.bits.b6;
d1.bits.b2 = d.bits.b5;
d1.bits.b3 = d.bits.b4;
d1.bits.b4 = d.bits.b3;
d1.bits.b5 = d.bits.b2;
d1.bits.b6 = d.bits.b1;
d1.bits.b7 = d.bits.b0;
//
if ( WriteI2C1( d1.Val ) ) // write 1 byte
{
return ( -3 ); // return with write collision error
}
IdleI2C1(); // test for idle condition
if ( SSP1CON2bits.ACKSTAT ) // test received ack bit state
{
return ( -2 ); // bus device responded with NOT ACK
} // terminate putsI2C1() function
}
wrptr ++; // increment pointer
}
//---TERMINATE COMMUNICATION FROM MASTER SIDE---
IdleI2C();
#else
UNUSED(add1);
UNUSED(wrptr);
UNUSED(size);
#endif
return 0;
}
byte I2CReadByte ( byte Device, byte Address )
{
byte Data = 0;
// Ensure I2C module is idle
IdleI2C();
// Transmit a Start condition
StartI2C();
// Wait till Start sequence is completed
while(I2CCONbits.SEN );
// Write Slave address and set master for transmission (R/W bit should be 0)
MasterWriteI2C(Device);
// Wait till address is transmitted
while(I2CSTATbits.TBF);
// Test for ACK condition received
while(I2CSTATbits.ACKSTAT);
// Ensure I2C module is idle
//IdleI2C();
// Write word address for serial EEPROM
MasterWriteI2C(Address);
// Wait till address is transmitted
while(I2CSTATbits.TBF);
// Test for ACK condition received
while(I2CSTATbits.ACKSTAT);
// Ensure I2C module is idle
//IdleI2C();
// Generate the I2C bus restart condition
RestartI2C();
// Wait until re-start condition is over
while (I2CCONbits.RSEN);
// WWrite Slave address and set master for reception (R/W bit should be 1)
MasterWriteI2C( Device+1 );
// Wait till address is transmitted
while(I2CSTATbits.TBF);
// Ensure I2C module is idle
//IdleI2C();
// Test for ACK condition received
while(I2CSTATbits.ACKSTAT);
// Ensure I2C module is idle
//IdleI2C();
// Read the data byte
Data = MasterReadI2C();
// Ensure I2C module is idle
//IdleI2C();
// send NACK condition back to the I2C slave indicating master received the data byte
NotAckI2C();
// wait until NACK sequence is over
while (I2CCONbits.ACKEN);
// Ensure I2C module is idle
//IdleI2C();
// send STOP condition
StopI2C();
// Wait till Stop sequence is completed
while(I2CCONbits.PEN);
// Ensure I2C module is idle
IdleI2C();
return ( Data ); // return with data
}
void readTempSensor(unsigned char *byte1, unsigned char *byte2,
unsigned char *slope, unsigned char *counter)
{
StartI2C();
IdleI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0xAA); // read two bytes command
IdleI2C();
RestartI2C();
IdleI2C();
WriteI2C(0x9F); // slave address + R
IdleI2C();
(*byte1) = ReadI2C();
IdleI2C();
AckI2C();
IdleI2C();
(*byte2) = ReadI2C();
IdleI2C();
NotAckI2C();
IdleI2C();
StopI2C();
Delay10KTCYx(1);
// read counter
StartI2C();
IdleI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0xA8); // read counter command
IdleI2C();
RestartI2C();
IdleI2C();
WriteI2C(0x9F); // slave address + R
IdleI2C();
(*counter) = ReadI2C();
IdleI2C();
NotAckI2C();
IdleI2C();
StopI2C();
Delay10KTCYx(1);
// read slope
StartI2C();
IdleI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0xA9); // read slope command
IdleI2C();
RestartI2C();
IdleI2C();
WriteI2C(0x9F); // slave address + R
IdleI2C();
(*slope) = ReadI2C();
IdleI2C();
NotAckI2C();
IdleI2C();
StopI2C();
Delay10KTCYx(1);
}
unsigned int EERandomRead( unsigned char control, unsigned char address )
{
IdleI2C(); // ensure module is idle
StartI2C(); // initiate START condition
while ( SSPCON2bits.SEN ); // wait until start condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
{
return ( -1 ); // return with Bus Collision error
}
else
{
if ( WriteI2C( control ) ) // write 1 byte
{
StopI2C();
return ( -3 ); // return with write collision error
}
//IdleI2C(); // ensure module is idle
if ( !SSPCON2bits.ACKSTAT ) // test for ACK condition, if received
{
if ( WriteI2C( address ) ) // WRITE word address for EEPROM
{
StopI2C();
return ( -3 ); // return with write collision error
}
//IdleI2C(); // ensure module is idle
if ( !SSPCON2bits.ACKSTAT ) // test for ACK condition, if received
{
RestartI2C(); // generate I2C bus restart condition
while ( SSPCON2bits.RSEN );// wait until re-start condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
{
return ( -1 ); // return with Bus Collision error
}
if ( WriteI2C( control+1 ) )// write 1 byte - R/W bit should be 1
{
StopI2C();
return ( -3 ); // return with write collision error
}
//IdleI2C(); // ensure module is idle
if ( !SSPCON2bits.ACKSTAT )// test for ACK condition, if received
{
SSPCON2bits.RCEN = 1; // enable master for 1 byte reception
while ( SSPCON2bits.RCEN ); // check that receive sequence is over
NotAckI2C(); // send ACK condition
while ( SSPCON2bits.ACKEN ); // wait until ACK sequence is over
StopI2C(); // send STOP condition
while ( SSPCON2bits.PEN ); // wait until stop condition is over
if ( PIR2bits.BCLIF ) // test for bus collision
{
return ( -1 ); // return with Bus Collision error
}
}
else
{
StopI2C();
return ( -2 ); // return with Not Ack error
}
}
else
{
StopI2C();
return ( -2 ); // return with Not Ack error
}
}
else
{
StopI2C();
return ( -2 ); // return with Not Ack error
}
}
return ( (unsigned int) SSPBUF ); // return with data
}
int LCDSendCommand(BYTE add1,BYTE* wrptr, BYTE size)
{
#ifdef _WINDOWS
UNUSED(add1);
UNUSED(wrptr);
UNUSED(size);
#else
BYTE i;
BYTE data;
BYTE status;
//****write the address of the device for communication***
if(START){
RestartI2C();
}
else {
StartI2C();
START=1;
}
IdleI2C();
data = SSPBUF; //read any previous stored content in buffer to clear buffer full status
do
{
status = WriteI2C( add1 | 0x00 ); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//R/W BIT IS '0' FOR FURTHER WRITE TO SLAVE
do
{
status = WriteI2C(modeLCD_CMD_TILL_STOP); //write the address of slave
if(status == -1) //check if bus collision happened
{
data = SSPBUF; //upon bus collision detection clear the buffer,
SSPCON1bits.WCOL=0; // clear the bus collision status bit
//LATAbits.LATA1 =1;
}
}
while(status!=0); //write untill successful communication
//***WRITE THE THE DATA TO BE SENT FOR SLAVE***
//write string of data to be transmitted to slave
for (i=0;i<size;i++ ) // transmit data
{
if ( SSP1CON1bits.SSPM3 ) // if Master transmitter then execute the following
{
//temp = putcI2C1 ( *wrptr );
//if (temp ) return ( temp );
if ( WriteI2C1( *wrptr ) ) // write 1 byte
{
return ( -3 ); // return with write collision error
}
IdleI2C1(); // test for idle condition
if ( SSP1CON2bits.ACKSTAT ) // test received ack bit state
{
return ( -2 ); // bus device responded with NOT ACK
} // terminate putsI2C1() function
}
wrptr ++; // increment pointer
}
IdleI2C();
#endif
return 0;
}
