/*********************************************************************
* Function: XEE_RESULT XEEBeginRead(unsigned char control,
* XEE_ADDR address)
*
* PreCondition: XEEInit() is already called.
*
* Input: control - EEPROM control and address code.
* address - Address at which read is to be performed.
*
* Output: XEE_SUCCESS if successful
* other value if failed.
*
* Side Effects: None
*
* Overview: Sets internal address counter to given address.
* Puts EEPROM in sequential read mode.
*
* Note: This function does not release I2C bus.
* User must call XEEEndRead() when read is not longer
* needed; I2C bus will released after XEEEndRead()
* is called.
********************************************************************/
XEE_RESULT XEEBeginRead(unsigned char control, XEE_ADDR address )
{
unsigned char r;
r = XEESetAddr(control, address);
if ( r != XEE_SUCCESS )
return r;
r = XEEClose();
if ( r != XEE_SUCCESS )
return r;
IdleI2C();
StartI2C();
while( EEPROM_SPICON2bits.SEN );
if ( PIR2bits.BCLIF )
return XEE_BUS_COLLISION;
if ( WriteI2C(control+1) )
return XEE_BUS_COLLISION;
IdleI2C();
if ( !EEPROM_SPICON2bits.ACKSTAT )
return XEE_SUCCESS;
return XEE_NAK;
}
/*********************************************************************
* Function: LDByteWriteI2C()
* Input: Control Byte, 8 - bit address, data.
* Overview: Write a byte to low density device at address LowAdd
********************************************************************/
unsigned int LDByteWriteI2C(unsigned char ControlByte, unsigned char LowAdd, unsigned char data)
{
unsigned int ErrorCode1;
unsigned int ErrorCode2;
IdleI2C(); //Ensure Module is Idle
StartI2C(); //Generate Start COndition
WriteI2C(ControlByte); //Write Control byte
IdleI2C();
ErrorCode1 = ACKStatus(); //Return ACK Status
WriteI2C(LowAdd); //Write Low Address
IdleI2C();
ErrorCode2 = ACKStatus(); //Return ACK Status
WriteI2C(data); //Write Data
IdleI2C();
StopI2C(); //Initiate Stop Condition
//EEAckPolling(ControlByte); //Perform ACK polling
if(ErrorCode1 == 0) { printf("ACK 1 not recieved"); }
if(ErrorCode2 == 0) { printf("ACK 2 not recieved"); }
//return(ErrorCode);
}
static int
i2c_write(struct i2c_platform_data *adap, unsigned char *buf,
unsigned int len)
{
int i;
u32 data;
pr_debug("i2c_write\n");
i = 0;
while (i < len) {
data = buf[i];
if (MasterWriteI2C(adap, data))
return -EIO;
IdleI2C(adap);
if (pic32_bus_readl(adap->base + PIC32_I2CxSTAT) &
I2CSTAT_ACKSTAT)
return -EIO;
i++;
}
StopI2C(adap);
IdleI2C(adap);
return 0;
}
// Configure and start temperature sensor
void configStartTempSensor(void)
{
// Set configuration register
StartI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0xAC); // access configuration
IdleI2C();
WriteI2C(0x00); // set config
IdleI2C();
StopI2C();
// Need at least a 10msec delay (from data sheet)
Delay10KTCYx(40);
// Start temperature conversion
StartI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0xEE); // start conversion
IdleI2C();
StopI2C();
// Another delay
Delay10KTCYx(40);
}
void internalChangeAddressLine(unsigned char oldAddress, unsigned char value) {
IdleI2C();
StartI2C();
MasterWriteI2C(oldAddress);
IdleI2C();
MasterWriteI2C(0);
IdleI2C();
MasterWriteI2C(value);
IdleI2C();
StopI2C();
IdleI2C();
}
// Configure and start temperature sensor
void stopTempSensor(void)
{
StartI2C();
IdleI2C();
WriteI2C(0x9E); // slave address + W
IdleI2C();
WriteI2C(0x22); // stop conversion
IdleI2C();
StopI2C();
// Another delay
Delay10KTCYx(40);
}
XEE_RESULT XEEWrite(unsigned char val)
{
IdleI2C(); // ensure module is idle
if ( WriteI2C( val ) ) // data byte for EEPROM
return XEE_BUS_COLLISION; // set error for write collision
IdleI2C();
if ( !EEPROM_SPICON2bits.ACKSTAT )
return XEE_SUCCESS;
return XEE_NAK;
}
/*********************************************************************
* Function: LDPageWriteI2C()
* Input: ControlByte, LowAdd, *wrptr.
* Overview: Write a page of data from array pointed to be wrptr
* starting at LowAdd
* Note: LowAdd must start on a page boundary
********************************************************************/
unsigned int LDPageWriteI2C(unsigned char ControlByte, unsigned char LowAdd, unsigned char *wrptr)
{
IdleI2C(); //wait for bus Idle
StartI2C(); //Generate Start condition
WriteI2C(ControlByte); //send controlbyte for a write
IdleI2C(); //wait for bus Idle
WriteI2C(LowAdd); //send low address
IdleI2C(); //wait for bus Idle
putstringI2C(wrptr); //send data
IdleI2C(); //wait for bus Idle
StopI2C(); //Generate Stop
return(0);
}
void writeSRF02Command(char addr, char reg, char cmd) {
StartI2C();
// Wait till Start sequence is completed
IdleI2C();
MasterWriteI2C(addr);
IdleI2C();
MasterWriteI2C(reg);
IdleI2C();
// command
MasterWriteI2C(cmd);
IdleI2C();
StopI2C();
}
/*********************************************************************
* 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
}
void setRelayStates(int relayStates) {
StartI2C();
IdleI2C();
while(I2CCONbits.SEN);
MasterWriteI2C(writeAddr);
IdleI2C();
// send the register
MasterWriteI2C(RLY08_REGISTER_RELAY_STATES);
IdleI2C();
// send the value
MasterWriteI2C(relayStates);
IdleI2C();
StopI2C();
}
void sendRLY08Command(int command) {
StartI2C();
IdleI2C();
while(I2CCONbits.SEN);
MasterWriteI2C(writeAddr);
IdleI2C();
// send the register
MasterWriteI2C(RLY08_REGISTER_COMMAND);
IdleI2C();
// send the value
MasterWriteI2C(command);
IdleI2C();
StopI2C();
}
int16_t ReadI2C (void)
{
int i;
static int16_t retval = 0;
if (IdleI2C () != 1)
{
return ERREUR_I2C_IDLE;
}
I2C1CONbits.RCEN = 1;
for (i=TIMEOUT_I2C; i>0; i--)
{
if(I2C1STATbits.RBF)
break;
if ((i-1) <= 0)
return ERREUR_I2C_READ;
}
retval = (int16_t)I2C1RCV;
return retval;
}
int16_t WriteI2C (uint8_t byte)
{
int i;
if (IdleI2C () != 1)
{
return ERREUR_I2C_IDLE;
}
I2C1TRN = byte;
for (i=TIMEOUT_I2C; i>0; i--)
{
if (!I2C1STATbits.TBF)
{
break;
}
else
{
if (i == 0)
return ERREUR_I2C_WRITE;
}
}
return 1;
}
int16_t RestartI2C (void)
{
int i;
if (IdleI2C () != 1)
{
return ERREUR_I2C_IDLE;
}
I2C1CONbits.RSEN = 1;
for (i=TIMEOUT_I2C; i>0; i--)
{
if (!I2C1CONbits.RSEN)
{
break;
}
else
{
if (i == 0)
return ERREUR_I2C_RESTART;
}
}
return 1;
}
int16_t StopI2C (void)
{
int i;
if (IdleI2C () != 1)
{
return ERREUR_I2C_IDLE;
}
I2C1CONbits.PEN = 1;
for (i=TIMEOUT_I2C; i>0; i--)
{
if (!I2C1CONbits.PEN)
{
break;
}
else
{
if (i == 0)
return ERREUR_I2C_STOP;
}
}
return 1;
}
void SendChar(unsigned char data) {
IdleI2C();
StartI2C();
IdleI2C();
putcI2C(OLED_address); //send address
IdleI2C();
putcI2C(0x40); //send data incomming
IdleI2C();
putcI2C(data);
IdleI2C();
// WriteI2C(0x40);
//WriteI2C(data);
StopI2C();
}
/*********************************************************************
* 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);
}
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: XEE_RESULT XEEEndWrite(void)
*
* PreCondition: XEEInit() && XEEBeginWrite() are already called.
*
* Input: None
*
* Output: XEE_SUCCESS if successful
* other value if failed.
*
* Side Effects: None
*
* Overview: Instructs EEPROM to begin write cycle.
*
* Note: Call this function after either page full of bytes
* written or no more bytes are left to load.
* This function initiates the write cycle.
* User must call for XEEWait() to ensure that write
* cycle is finished before calling any other
* routine.
********************************************************************/
XEE_RESULT XEEEndWrite(void)
{
IdleI2C();
StopI2C();
while(EEPROM_SPICON2bits.PEN);
return XEE_SUCCESS;
}
/*********************************************************************
* 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
}
void EEPROM_read(BYTE devaddr, DWORD addr, BYTE *data, BYTE size)
{
// Dummy read to setup address
IdleI2C();
StartI2C();
IdleI2C();
// Dev address
WriteI2C( devaddr << 1 );
IdleI2C();
// Memory address
WriteI2C( addr >> 8 );
IdleI2C();
WriteI2C( addr & 0xFF );
IdleI2C();
EEPROM_read_seq(devaddr, data, size);
}
/*********************************************************************
* 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);
}
/**
* Gets the software revision of the software in the RLY08
*/
unsigned int getRLY08SoftwareRevision() {
IdleI2C();
StartI2C();
IdleI2C();
while(I2CCONbits.SEN);
// send the address
MasterWriteI2C(writeAddr);
IdleI2C();
// send the register
MasterWriteI2C(RLY08_REGISTER_SOFTWARE_REVISION);
IdleI2C();
StopI2C();
IdleI2C();
StartI2C();
while(I2CCONbits.SEN);
// send the address again with read bit
MasterWriteI2C(readAddr);
IdleI2C();
// read the data
unsigned char data = MasterReadI2C();
IdleI2C();
StopI2C();
return data;
}
XEE_RESULT XEEClose(void)
{
IdleI2C();
StopI2C();
while( EEPROM_SPICON2bits.PEN ); // wait until stop condition is over.
if ( PIR2bits.BCLIF )
return XEE_BUS_COLLISION;
return XEE_SUCCESS;
}
unsigned char HDByteWriteI2C( unsigned char ControlByte, unsigned char HighAdd, unsigned char LowAdd, unsigned char data )
{
IdleI2C(); // ensure module is idle
StartI2C(); // initiate START condition
while ( SSPCON2bits.SEN ); // wait until start condition is over
WriteI2C( ControlByte ); // write 1 byte - R/W bit should be 0
IdleI2C(); // ensure module is idle
WriteI2C( HighAdd ); // write address byte to EEPROM
IdleI2C(); // ensure module is idle
WriteI2C( LowAdd ); // write address byte to EEPROM
IdleI2C(); // ensure module is idle
WriteI2C ( data ); // Write data byte to EEPROM
IdleI2C(); // ensure module is idle
StopI2C(); // send STOP condition
while ( SSPCON2bits.PEN ); // wait until stop condition is over
while (EEAckPolling(ControlByte)); //Wait for write cycle to complete
return ( 0 ); // return with no error
}
void Gyro_I2C_W(UINT8 LowAdd, UINT8 data)
{
//UINT8 ErrorCode;
IdleI2C(); //Ensure Module is Idle
StartI2C(); //Generate Start COndition
WriteI2C(Gyro_MPU6050_Address); //Write Control byte
IdleI2C();
//ErrorCode = ACKStatus(); //Return ACK Status
WriteI2C(LowAdd); //Write Low Address
IdleI2C();
//ErrorCode = ACKStatus(); //Return ACK Status
WriteI2C(data); //Write Data
IdleI2C();
StopI2C(); //Initiate Stop Condition
}
/*********************************************************************
* Function: XEE_RESULT XEESetAddr(unsigned char control,
* XEE_ADDR address)
*
* PreCondition: XEEInit() is already called.
*
* Input: control - data EEPROM control code
* address - address to be set
*
* Output: XEE_SUCCESS if successful
* other value if failed.
*
* Side Effects: None
*
* Overview: Modifies internal address counter of EEPROM.
*
* Note: This function does not release the I2C bus.
* User must close XEEClose() after this function
* is called.
********************************************************************/
XEE_RESULT XEESetAddr(unsigned char control, XEE_ADDR address)
{
union
{
unsigned short int Val;
struct
{
unsigned char LSB;
unsigned char MSB;
} bytes;
} tempAddress;
tempAddress.Val = address;
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
if ( WriteI2C( control ) ) // write 1 byte
return XEE_BUS_COLLISION; // set error for write collision
IdleI2C(); // ensure module is idle
if ( !EEPROM_SPICON2bits.ACKSTAT ) // test for ACK condition, if received
{
if ( WriteI2C( tempAddress.bytes.MSB ) ) // WRITE word address to EEPROM
return XEE_BUS_COLLISION; // return with write collision error
IdleI2C(); // ensure module is idle
if ( WriteI2C( tempAddress.bytes.LSB ) ) // WRITE word address to EEPROM
return XEE_BUS_COLLISION; // return with write collision error
IdleI2C(); // ensure module is idle
if ( !EEPROM_SPICON2bits.ACKSTAT ) // test for ACK condition received
return XEE_SUCCESS;
else
return XEE_NAK; // return with Not Ack error
}
else
return XEE_NAK; // return with Not Ack error
}
/*
* 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;
}
static int
do_address(struct i2c_platform_data *adap, unsigned int addr, int rd)
{
pr_debug("doaddress\n");
IdleI2C(adap);
StartI2C(adap);
IdleI2C(adap);
addr <<= 1;
if (rd)
addr |= 1;
if (MasterWriteI2C(adap, addr))
return -EIO;
IdleI2C(adap);
if (pic32_bus_readl(adap->base + PIC32_I2CxSTAT) & I2CSTAT_ACKSTAT)
return -EIO;
return 0;
}
