uint8_t I2cMcuWriteBuffer( I2c_t *obj, uint8_t deviceAddr, uint16_t addr, uint8_t *buffer, uint16_t size )
{
uint32_t timeOut;
/* Test on BUSY Flag */
timeOut = TIMEOUT_MAX;
while( I2C_GetFlagStatus( obj->I2c, I2C_FLAG_BUSY) )
{
if( ( timeOut-- ) == 0 )
{
I2cResetBus( obj );
return( FAIL );
}
}
/* Send START condition */
I2C_GenerateSTART( obj->I2c, ENABLE );
/* Test on EV5 and clear it */
timeOut = TIMEOUT_MAX;
while( !I2C_CheckEvent( obj->I2c, I2C_EVENT_MASTER_MODE_SELECT ) )
{
if( ( timeOut-- ) == 0 )
{
I2cResetBus( obj );
return( FAIL );
}
}
/* Send device's address for write */
I2C_Send7bitAddress( obj->I2c, deviceAddr, I2C_Direction_Transmitter );
/* Test on EV6 and clear it */
timeOut = TIMEOUT_MAX;
while( !I2C_CheckEvent( obj->I2c, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED ) )
{
if( ( timeOut-- ) == 0 )
{
I2cResetBus( obj );
return( FAIL );
}
}
if( ( addr & 0xFF00 ) != 0x0000 )
{
/* Send the device's internal address MSB to write to */
I2C_SendData( obj->I2c, ( uint8_t )( ( addr & 0xFF00 ) >> 8 ) );
/* Test on EV8 and clear it */
timeOut = TIMEOUT_MAX;
while( !I2C_CheckEvent( obj->I2c, I2C_EVENT_MASTER_BYTE_TRANSMITTING ) )
{
if( ( timeOut-- ) == 0 )
{
I2cResetBus( obj );
return( FAIL );
}
}
}
uint8_t MPL3115Init( void )
{
uint8_t regVal = 0;
MPL3115SetDeviceAddr( MPL3115A_I2C_ADDRESS );
if( MPL3115Initialized == false )
{
MPL3115Write( CTRL_REG1, RST );
DelayMs( 50 );
I2cResetBus( &I2c );
// Check MPL3115 ID
MPL3115Read( MPL3115_ID, ®Val );
if( regVal != 0xC4 )
{
return FAIL;
}
MPL3115Write( PT_DATA_CFG_REG, DREM | PDEFE | TDEFE ); // Enable data ready flags for pressure and temperature )
MPL3115Write( CTRL_REG1, ALT | OS_32 | SBYB ); // Set sensor to active state with oversampling ratio 128 (512 ms between samples)
MPL3115Initialized = true;
}
return SUCCESS;
}
