/*!
* Read a register from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char u8MMA7660ReadRegister(unsigned char u8RegisterAddress)
{
unsigned char result;
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C1_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C1_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C1_D = (MMA7660_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C1_C1 &= (~I2C_C1_TX_MASK);
/* Turn off ACK */
I2C1_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C1_D ;
i2c_Wait();
/* Send stop */
i2c_Stop();
result = I2C1_D ;
return result;
}
/*!
* Read first three registers from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned long u8MMA7660ReadThreeRegisters(unsigned char u8RegisterAddress)
{
unsigned char result1 = 0, result2 = 0, result3 = 0;
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (MMA7660_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Ensure TXAK bit is 0 */
I2C0_C1 &= ~I2C_C1_TXAK_MASK;
/* Dummy read */
result1 = I2C0_D ;
i2c_Wait();
/* Read first byte */
result1 = I2C0_D;
i2c_Wait();
/* Turn off ACK since this is second to last read*/
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Read second byte */
result2 = I2C0_D;
i2c_Wait();
/* Send stop */
i2c_Stop();
/* Read third byte */
result3 = I2C0_D;
unsigned long totalresult = result1;
totalresult <<= 8;
totalresult |= result2;
totalresult <<= 8;
totalresult |= result3;
// Provide a gap between this read and the next
time_delay_ms(250);
return totalresult;
}
/*!
* Read first three registers from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char I2CReadMultiRegisters(unsigned char u8RegisterAddress, unsigned char bytes)
{
unsigned char n=bytes;
int i;
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (ACCEL_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Ensure TXAK bit is 0 */
I2C0_C1 &= ~I2C_C1_TXAK_MASK;
/* Dummy read */
result[0] = I2C0_D ;
i2c_Wait();
for(i=0;i<n-2;i++)
{
/* Read first byte */
result[i] = I2C0_D;
i2c_Wait();
}
/* Turn off ACK since this is second to last read*/
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Read second byte */
result[i++] = I2C0_D;
i2c_Wait();
/* Send stop */
i2c_Stop();
/* Read third byte */
result[i++] = I2C0_D;
// printf("%3d %3d %3d\n",result[0],result[2],result[4]);
return result[0];
}
/*!
* Read a register from the MPR084
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char i2cMultiReadRegister(uint8_t Address, uint8_t u8RegisterAddress, uint8_t *DataBlock, uint8_t ReadSize)
{
uint8_t result = 0;
unsigned int j;
/* Send Slave Address */
IIC_StartTransmission(Address,SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (Address << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
I2C0_C1 &= (~I2C_C1_TXAK_MASK);
/* Turn off ACK */
// I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C0_D ;
for (j=0; j<5000; j++){};
i2c_Wait();
result = 0;
while(ReadSize--)
{
DataBlock[result++] = I2C0_D;
i2c_Wait();
if(ReadSize == 1)
{
/* Turn off ACK */
I2C0_C1 |= I2C_C1_TXAK_MASK;
}
}
/* Send stop */
i2c_Stop();
DataBlock[result] = I2C0_D ;
Pause();
return result;
}
/*!
* Read first three registers from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char u8MMA7660ReadThreeRegisters(unsigned char u8RegisterAddress)
{
unsigned char result1, result2, result3;
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (MMA7660_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Ensure TXAK bit is 0 */
I2C0_C1 &= ~I2C_C1_TXAK_MASK;
/* Dummy read */
result1 = I2C0_D ;
i2c_Wait();
/* Read first byte */
result1 = I2C0_D;
i2c_Wait();
/* Turn off ACK since this is second to last read*/
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Read second byte */
result2 = I2C0_D;
i2c_Wait();
/* Send stop */
i2c_Stop();
/* Read third byte */
result3 = I2C0_D;
printf("%3d %3d %3d\n",result1,result2,result3);
return result1;
}
/*!
* Write a byte of Data to specified register on MPR084
* @param u8RegisterAddress is Register Address
* @param u8Data is Data to write
*/
void I2C_WriteRegister(unsigned char u8I2CSlaveAddress,unsigned char u8RegisterAddress, unsigned char u8Data)
{
/* send data to slave */
IIC_StartTransmission(u8I2CSlaveAddress,MWSR);
i2c0_Wait();
I2C0_D = u8RegisterAddress;
i2c0_Wait();
I2C0_D = u8Data;
i2c0_Wait();
i2c0_Stop();
Pause();
}
/*!
* Write a byte of Data to specified register on MMA7660
* @param u8RegisterAddress is Register Address
* @param u8Data is Data to write
*/
void MMA7660WriteRegister(unsigned char u8RegisterAddress, unsigned char u8Data)
{
/* send data to slave */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
I2C0_D = u8RegisterAddress;
i2c_Wait();
I2C0_D = u8Data;
i2c_Wait();
i2c_Stop();
Pause();
}
/*!
* Write a byte of Data to specified register on I2C0 bus
* @param Address I2C bus address
* @param u8RegisterAddress is Register Address
* @param u8Data is Data to write
*/
void i2cWriteRegister(uint8_t Address, uint8_t u8RegisterAddress, uint8_t u8Data)
{
/* send data to slave */
IIC_StartTransmission(Address,SlaveID,MWSR);
i2c_Wait();
I2C0_D = u8RegisterAddress;
i2c_Wait();
I2C0_D = u8Data;
i2c_Wait();
i2c_Stop();
Pause();
}
/*!
* Read a register from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char u8MMA7660ReadRegister(unsigned char u8RegisterAddress)
{
signed char result = 0;
int tries_remaining = 5;
// while ((result & 0x40) && tries_remaining--)
// {
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (MMA7660_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Turn off ACK since this is second to last byte being read*/
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C0_D ;
i2c_Wait();
/* Send stop since about to read last byte */
i2c_Stop();
/* Read byte */
result = I2C0_D ;
// }
if (result & 0x40)
{
puts("Returning alerted (invalid) result");
}
time_delay_ms(200);
return result;
}
/*!
* Write a byte of Data to specified register on I2C0 bus
* @param Address I2C bus address
* @param PtrData pointer to where the data is located
* @param Size number of bytes to write
*/
void i2cWriteData(uint8_t Address, uint8_t *PtrData,uint8_t Size)
{
uint8_t i;
if(Size)
{
/* send data to slave */
IIC_StartTransmission(Address,SlaveID,MWSR);
i2c_Wait();
for(i=0; i<Size; i++)
{
I2C0_D = PtrData[i];
i2c_Wait();
}
i2c_Stop();
Pause();
}
}
/*!
* Read a register from the MPR084
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char I2C_ReadRegister(unsigned char u8I2CSlaveAddress,unsigned char u8RegisterAddress)
{
unsigned char result;
unsigned int j;
/* Send Slave Address */
IIC_StartTransmission(u8I2CSlaveAddress,MWSR);
i2c0_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c0_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (u8I2CSlaveAddress << 1) | 0x01; //read address
i2c0_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Turn off ACK */
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C0_D ;
for (j=0; j<5000; j++){}; //not sure why need delay
i2c0_Wait();
/* Send stop */
i2c0_Stop();
result = I2C0_D ;
Pause();
return result;
}
/*!
* Read a register from the MMA7660
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char I2CReadRegister(unsigned char u8RegisterAddress)
{
unsigned char result;
/* Send Slave Address */
IIC_StartTransmission(SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (ACCEL_I2C_ADDRESS << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Turn off ACK since this is second to last byte being read*/
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C0_D ;
i2c_Wait();
/* Send stop since about to read last byte */
i2c_Stop();
/* Read byte */
result = I2C0_D ;
return result;
}
/*!
* Read a register from the MPR084
* @param u8RegisterAddress is Register Address
* @return Data stored in Register
*/
unsigned char i2cReadRegister(uint8_t Address, uint8_t u8RegisterAddress)
{
uint8_t result;
unsigned int j;
/* Send Slave Address */
IIC_StartTransmission(Address,SlaveID,MWSR);
i2c_Wait();
/* Write Register Address */
I2C0_D = u8RegisterAddress;
i2c_Wait();
/* Do a repeated start */
I2C0_C1 |= I2C_C1_RSTA_MASK;
/* Send Slave Address */
I2C0_D = (Address << 1) | 0x01; //read address
i2c_Wait();
/* Put in Rx Mode */
I2C0_C1 &= (~I2C_C1_TX_MASK);
/* Turn off ACK */
I2C0_C1 |= I2C_C1_TXAK_MASK;
/* Dummy read */
result = I2C0_D ;
for (j=0; j<5000; j++){};
i2c_Wait();
/* Send stop */
i2c_Stop();
result = I2C0_D ;
Pause();
return result;
}
