/**
* \brief This function reads data from EEPROM.
*
* \param data Address where data is to be read.
* \param length Length of data to be read
* \param offset Address of the byte from which data to be read.
*
* \return None.
*
* \note This muxing depends on the profile in which the EVM is configured.
* EEPROMI2CSetUp Shall be called Before this API is used
*/
void EEPROMI2CRead(unsigned char *data, unsigned int length,
unsigned short offset)
{
unsigned int idx = 0;
/* First send the register offset - TX operation */
I2CSetDataCount(I2C_BASE_ADDR, 2);
StatusClear();
I2CMasterControl(I2C_BASE_ADDR, I2C_CFG_MST_TX);
I2CMasterStart(I2C_BASE_ADDR);
/* Wait for the START to actually occir on the bus */
while (0 == I2CMasterBusBusy(I2C_BASE_ADDR));
I2CMasterDataPut(I2C_BASE_ADDR, (unsigned char)((offset >> 8) & 0xFF));
/* Wait for the Tx register to be empty */
while (0 == I2CMasterIntRawStatusEx(I2C_BASE_ADDR,
I2C_INT_TRANSMIT_READY));
/* Push offset out and tell CPLD from where we intend to read the data */
I2CMasterDataPut(I2C_BASE_ADDR, (unsigned char)(offset & 0xFF));
I2CMasterIntClearEx(I2C_BASE_ADDR, I2C_INT_TRANSMIT_READY);
while(0 == (I2CMasterIntRawStatus(I2C_BASE_ADDR) & I2C_INT_ADRR_READY_ACESS));
StatusClear();
I2CSetDataCount(I2C_BASE_ADDR, length);
/* Now that we have sent the register offset, start a RX operation*/
I2CMasterControl(I2C_BASE_ADDR, I2C_CFG_MST_RX);
/* Repeated start condition */
I2CMasterStart(I2C_BASE_ADDR);
while (length--)
{
while (0 == I2CMasterIntRawStatusEx(I2C_BASE_ADDR,
I2C_INT_RECV_READY));
data[idx++] = (unsigned char)I2CMasterDataGet(I2C_BASE_ADDR);
I2CMasterIntClearEx(I2C_BASE_ADDR, I2C_INT_RECV_READY);
}
I2CMasterStop(I2C_BASE_ADDR);
while(0 == (I2CMasterIntRawStatus(I2C_BASE_ADDR) & I2C_INT_STOP_CONDITION));
I2CMasterIntClearEx(I2C_BASE_ADDR, I2C_INT_STOP_CONDITION);
}
/*
** Transmits data over I2C bus
*/
void SetupI2CTransmit2(int count)
{
I2CSetDataCount(SOC_I2C_0_REGS, count);
I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_TX | I2C_CFG_STOP);
I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_TRANSMIT_READY
| I2C_INT_STOP_CONDITION
| I2C_INT_NO_ACK);
I2CMasterStart(SOC_I2C_0_REGS);
while(flag);
flag = 1;
}
/*
** Receives data over I2C bus
*/
void SetupI2CReception(int count)
{
I2CSetDataCount(SOC_I2C_0_REGS, count);
I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_RX | I2C_CFG_STOP);
I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_DATA_READY
| I2C_INT_STOP_CONDITION
| I2C_INT_NO_ACK);
I2CMasterStart(SOC_I2C_0_REGS);
while(flag);
flag = 1;
}
/*
** Function to receive data from the Codec through I2C bus
*/
static void I2CCodecRcvBlocking(unsigned int baseAddr, unsigned int dataCnt)
{
txCompFlag = 1;
dataIdx = 0;
savedBase = baseAddr;
I2CSetDataCount(baseAddr, dataCnt);
I2CMasterControl(baseAddr, I2C_CFG_MST_RX | I2C_CFG_STOP);
I2CMasterIntEnableEx(baseAddr, I2C_INT_DATA_READY | I2C_INT_STOP_CONDITION);
I2CMasterStart(baseAddr);
/* Wait till data is received fully */
while(txCompFlag);
}
/*
** Function to send data through i2c
*/
static void I2CCodecSendBlocking(unsigned int baseAddr, unsigned int dataCnt)
{
txCompFlag = 1;
dataIdx = 0;
savedBase = baseAddr;
I2CSetDataCount(baseAddr, dataCnt);
I2CMasterControl(baseAddr, I2C_CFG_MST_TX | I2C_CFG_STOP);
I2CMasterIntEnableEx(baseAddr, I2C_INT_TRANSMIT_READY | I2C_INT_STOP_CONDITION);
I2CMasterStart(baseAddr);
/* Wait till the data is sent */
while(txCompFlag);
}
/*
** Function to receive data from the Codec through I2C bus
*/
void I2C0RcvBlocking(unsigned int dataCnt)
{
txCompFlag = 1;
dataIdx = 0;
while(I2C0IsBusy());
I2CSetDataCount(SOC_I2C_0_REGS, dataCnt);
I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_RX | I2C_CFG_STOP);
I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_DATA_READY
| I2C_INT_STOP_CONDITION
| I2C_INT_NO_ACK);
I2CMasterStart(SOC_I2C_0_REGS);
/* Wait till data is received fully */
while(txCompFlag);
while(I2C0IsBusy());
}
/*
** Function to send data through i2c
*/
void I2C0SendBlocking(unsigned int dataCnt)
{
txCompFlag = 1;
dataIdx = 0;
while(I2C0IsBusy());
I2CSetDataCount(SOC_I2C_0_REGS, dataCnt);
I2CMasterControl(SOC_I2C_0_REGS, I2C_CFG_MST_TX | I2C_CFG_STOP);
I2CMasterIntEnableEx(SOC_I2C_0_REGS, I2C_INT_TRANSMIT_READY
| I2C_INT_STOP_CONDITION
| I2C_INT_NO_ACK);
I2CMasterStart(SOC_I2C_0_REGS);
/* Wait till the data is sent */
while(txCompFlag);
while(I2C0IsBusy());
}
