AS7263 Datasheet, PDF (19/45 Pages) ams AG – 6 near-IR channels: 610nm, 680nm, 730nm, 760nm, 810nm and 860nm, each with 20nm FWHM

AS7263 − Detailed Description
Figure 19:
I²C Virtual Register Byte Write
Pseudocode
Poll I²C slave STATUS register;
If TX_VALID bit is 0, a write can be performed on the interface;
Send a virtual register address and set the MSB of the register address to 1 to indicate the pending write;
Poll I²C slave STATUS register;
If TX_VALID bit is 0, the virtual register address for the write has been received and the data may now be written;
Write the data.
Sample Code:
#define I2C_AS72XX_SLAVE_STATUS_REG0x00
#define I2C_AS72XX_SLAVE_WRITE_REG0x01
#define I2C_AS72XX_SLAVE_READ_REG0x02
#define I2C_AS72XX_SLAVE_TX_VALID0x02
#define I2C_AS72XX_SLAVE_RX_VALID0x01
void i2cm_AS72xx_write(uint8_t virtualReg, uint8_t d)
{
volatile uint8_tstatus;
while (1)
{
// Read slave I²C status to see if the write buffer is ready.
status = i2cm_read(I2C_AS72XX_SLAVE_STATUS_REG);
if ((status & I2C_AS72XX_SLAVE_TX_VALID) == 0)
// No inbound TX pending at slave. Okay to write now.
break ;
}
// Send the virtual register address (setting bit 7 to indicate a pending write).
i2cm_write(I2C_AS72XX_SLAVE_WRITE_REG, (virtualReg | 0x80)) ;
while (1)
{
// Read the slave I2C status to see if the write buffer is ready.
status = i2cm_read(I2C_AS72XX_SLAVE_STATUS_REG) ;
if ((status & I2C_AS72XX_SLAVE_TX_VALID) == 0)
// No inbound TX pending at slave. Okay to write data now.
break;
}
// Send the data to complete the operation.
i2cm_write(I2C_AS72XX_SLAVE_WRITE_REG, d);
}
ams Datasheet
[v1-00] 2016-Nov-25
Page 19
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