#include "i2c.h"


void i2cInit(	i2c_t *i2cHardware,					/*!< Pointer to I2C hardware Object						*/
				i2cCh_t channelNo,					/*!< The harware channel to be used						*/	
				i2cMode_t mode,						/*!< Master, Slave or Multymaster Modes					*/
				uint16_t mainAddress,				/*!< First and Main address of the device				*/ 
				uint16_t secondAddress,				/*!< Second address if dual addresse mode is configured	*/
				i2cAddressCount_t addressCount,		/*!< Single or multiple									*/ 
				i2cAddressSize_t addressSize,		/*!< 10 or 7 bit address size							*/
				i2cSpeed_t speed,					/*!< Bus Speed											*/  
				i2cOpperationMode_t opperationMode,	/*!< Blocking or non blocking polling, Int or DMA		*/
				i2cClockStretching_t stretching,	/*!< Clock Stretching enable onyl in slave mode			*/
				i2cWakeUpTypes_t wakeOn)			/*!< Wake up condition									*/
{
	i2cHardware->channelNo = channelNo;
	i2cHardware->mode = mode;
	i2cHardware->mainAddress = mainAddress;				 
	i2cHardware->secondAddress = secondAddress;
	i2cHardware->addressCount = addressCount; 
	i2cHardware->addressSize = addressSize;
	i2cHardware->speed = speed; 														
	i2cHardware->opperationMode = opperationMode; 
	i2cHardware->stretching = stretching;
	i2cHardware->wakeOn = wakeOn;
	i2cHardware->hardwareState = i2cHwIdle;
	i2cHardware->periferalState = i2cPerifNotInitialized;

	i2cEnableHardware(i2cHardware);	

	i2cDisablePeriferal(i2cHardware);	

	i2cConfigureFilters(i2cHardware);

	i2cSetClockStretch(i2cHardware, stretching);

	i2cSetSpeed(i2cHardware, speed);

	i2cSetMode(i2cHardware, opperationMode);
	
	i2cSetAddressLenght(i2cHardware, addressSize);
	
	i2cSetAddress(i2cHardware, mainAddress, secondAddress);

	i2cEnablePeriferal(i2cHardware);	

	i2cHardware->periferalState = i2cPerifNotInitialized;
}


void i2cDeInit(i2c_t *i2cHardware)
{

}	


void i2cRead(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data, uint8_t *dataLenght)
{
	switch(i2cHardware->mode)
	{
		case i2cModeMaster: 
			i2cMasterRecieve(i2cHardware, slaveAddress, registerAddress, data);
			break; 
		case i2cModeSlave: 
			break; 
		case i2cModeMultyMaster: 
			break; 
	}
}

// this function still doesn't implment 10 bit oopeartion TODO
void i2cMasterRecieve(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data)
{
	switch(i2cHardware->opperationMode)
	{
		case i2cOpperationPolling : 
			i2cMasterRecievePolling(i2cHardware, slaveAddress, registerAddress, data);
			break;
		case i2cOpperationInt:		
			break;
		case i2cOpperationDma: 
			break;
	}
}

void i2cWrite(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data, uint8_t *dataLenght)
{
	switch(i2cHardware->mode)
	{
		case i2cModeMaster: 
			i2cMasterSend(i2cHardware, slaveAddress, registerAddress, data);
			break; 
		case i2cModeSlave: 
			break; 
		case i2cModeMultyMaster: 
			break; 
	}
}

void i2cMasterSend(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data)
{
	switch(i2cHardware->opperationMode)
	{
		case i2cOpperationPolling : 
			i2cMasterSendPolling(i2cHardware, slaveAddress, registerAddress, data);
			break;
		case i2cOpperationInt:		
			break;
		case i2cOpperationDma: 
			break;
	}
}


void i2cMasterSendPolling(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data)
{
	while(i2cHardware->periferalState != i2cPerifReady)
	{
		i2cIsPeriferalReady(i2cHardware);
	}
	
	i2cHardware->periferalState = i2cPerifTransmitting;
	
	i2cInitiateWriteCommand(i2cHardware);
	i2cSetTransferCounter(i2cHardware,2);
	i2cSendSlaveAddress(i2cHardware, slaveAddress);
	i2cSendRegisterAddress(i2cHardware,registerAddress);
	
	i2cSendData(i2cHardware,data);
	
	while(i2cHardware->periferalState != i2cPerifTransferComplete)
	{
		i2cIsTransferComplete(i2cHardware);
	}
	
	i2cCR2 = I2C_BASE->CR2;
	
	i2cGenerateStop(i2cHardware);
	
	i2cHardware->periferalState = i2cPerifReady;
	i2cHardware->hardwareState = i2cHwIdle;
}


void i2cMasterRecievePolling(i2c_t *i2cHardware, uint16_t *slaveAddress, uint8_t *registerAddress, uint8_t *data)
{
	while(i2cHardware->periferalState != i2cPerifReady)
	{
		i2cIsPeriferalReady(i2cHardware);
	}
	
	i2cHardware->periferalState = i2cPerifTransmitting;
	
	i2cSetTransferCounter(i2cHardware,1); 
	i2cInitiateWriteCommand(i2cHardware);
	i2cSendSlaveAddress(i2cHardware, slaveAddress);
	i2cSendRegisterAddress(i2cHardware,registerAddress);

	while(i2cHardware->periferalState != i2cPerifTransferComplete)
	{
		i2cIsTransferComplete(i2cHardware);
	}
	
	i2cInitiateReadCommand(i2cHardware); 
	i2cSendSlaveAddress(i2cHardware, slaveAddress);
	
	i2cHardware->periferalState = i2cPerifRecieving;
	
	while(i2cHardware->hardwareState != i2cHwInputBufferFull)
	{
		i2cIsInputBufferEmpty(i2cHardware);
	}

	i2cGenerateNack(i2cHardware);
	i2cGenerateStop(i2cHardware);
	
	i2cReadInputRegister(i2cHardware, data);

	i2cHardware->periferalState = i2cPerifReady;
	i2cHardware->hardwareState = i2cHwIdle;
}