uint16_t Light::readRaw()
{
unsigned char I2C_Buf[3];
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x02;
TWI_Start_Read_Write(I2C_Buf, 2);
_delay_us(1);
I2C_Buf[0] = I2C_ADDR_READ;
I2C_Buf[1] = 0;
I2C_Buf[2] = 0;
TWI_Start_Read_Write(I2C_Buf, 3);
TWI_Read_Data_From_Buffer(I2C_Buf, 3);
uint16_t result = I2C_Buf[1] + (I2C_Buf[2] << 8);
return result;
}
void pca9634_setOpMode(uint8_t id, pca9634_OpMode_t mode)
{
if (id < 8)
{
unsigned char msgBuf[5];
/* */
uint8_t reg;
uint8_t shift = (id&0b11)<<1;
uint8_t data;
if (id < 4)
{
reg = PCA9634_REG_LEDOUT0;
pca9634_LEDOUT0 = pca9634_LEDOUT0|(mode<<shift);
data = pca9634_LEDOUT0;
}
else if (id < 8)
{
reg = PCA9634_REG_LEDOUT1;
pca9634_LEDOUT1 = pca9634_LEDOUT1|(mode<<shift);
data = pca9634_LEDOUT1;
}
msgBuf[0] = (pca9634_address<<TWI_ADR_BITS) | (FALSE<<TWI_READ_BIT);
msgBuf[1] = reg;
msgBuf[2] = data;
TWI_Start_Read_Write( msgBuf, 3 );
while ( TWI_Transceiver_Busy() );
}
}
/****************************************************************************
Call this function to perform a random read. That is, a starting memory address
is written, a second START is sent after receiving ACK, the slave address is re-
transmitted with the read bit set, and multiple bytes are read from memory. This
function works by setting the TWI_statusReg.memRead bit and calling the
TWI_Start_Read_Write function. The ISR handles the repeated start.
-- 5/3/09 - added addrLen argument.
****************************************************************************/
void TWI_Start_Random_Read( unsigned char *msg, unsigned char msgSize, unsigned char addrLen )
{
msg[0] &= ~(TRUE<<TWI_READ_BIT); // Be sure read/write bit is clear (write) regardless.
SavedMsgSize = msgSize; // Save msgSize - it'll be restored in the ISR
TWI_statusReg.memRead = TRUE; // Flag memory read
TWI_Start_Read_Write( msg, addrLen ); // Set size for initial call.
}
void Light::start()
{
unsigned char I2C_Buf[3];
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x00;
I2C_Buf[2] = 0b10100000;
TWI_Start_Read_Write(I2C_Buf, 3);
}
void Light::setRange(uint8_t range)
{
unsigned char I2C_Buf[3];
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x01;
I2C_Buf[2] = range & 0b00000011;
TWI_Start_Read_Write(I2C_Buf, 3);
_delay_ms(10);
}
void Light::stop()
{
unsigned char I2C_Buf[3];
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x00;
I2C_Buf[2] = 0x00;
TWI_Start_Read_Write(I2C_Buf, 3);
lcd.backlight(255);
lastSeconds = 0;
}
void Light::start()
{
unsigned char I2C_Buf[3];
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x00;
I2C_Buf[2] = 0b10100000;
TWI_Start_Read_Write(I2C_Buf, 3);
offset = OFFSET_UNSET;
filterIndex = -1;
initialized = 1;
paused = 0;
}
void pca9634_setDuty(uint8_t id, uint8_t step)
{
/* set register PWM[id] to step */
if (id < 8)
{
unsigned char msgBuf[5];
msgBuf[0] = (pca9634_address<<TWI_ADR_BITS) | (FALSE<<TWI_READ_BIT);
msgBuf[1] = PCA9634_REG_PWM0+id;
msgBuf[2] = step;
TWI_Start_Read_Write( msgBuf, 3 );
while ( TWI_Transceiver_Busy() );
}
}
void Light::stop()
{
unsigned char I2C_Buf[3];
initialized = 0;
I2C_Buf[0] = I2C_ADDR_WRITE;
I2C_Buf[1] = 0x00;
I2C_Buf[2] = 0x00;
TWI_Start_Read_Write(I2C_Buf, 3);
lcd.backlight(255);
lastSeconds = 0;
paused = 0;
lockedSlope = 0.0;
integrationActive = false;
}
void pca9634_init(uint8_t address)
{
unsigned char msgBuf[5];
TWI_Master_Initialise();
pca9634_address = address;
/* init, MODE1.SLEEP shall be set to normal mode */
uint8_t data = PCA9634_MODE1_SLEEP|PCA9634_MODE1_SUB1|PCA9634_MODE1_SUB2|PCA9634_MODE1_SUB3|PCA9634_MODE1_ALL;
msgBuf[0] = (pca9634_address<<TWI_ADR_BITS) | (FALSE<<TWI_READ_BIT);
msgBuf[1] = PCA9634_REG_MODE1;
msgBuf[2] = data;
TWI_Start_Read_Write( msgBuf, 3 );
while ( TWI_Transceiver_Busy() );
}
