Invalid range from VL6180X
I have the X-NUCLEO-6180XA1 board working with an STM32G071 Nucleo board. However the range reading doesn't seem to change when the range to the object changes. If there is nothing in range, I correctly read 0x72 from the range status register, but if something is in range, I seem to always get a range around 0x09 to 0x0D, regardless of if the target is moved closer or further.
Is there some setting I might be missing? I'm initializing the registers as follows:
static const vl6180x_reg_value_t init_regs[] = {
/* REGISTER_TUNING_SR03_270514_CustomerView.txt */
{0x0207, 0x01},
{0x0208, 0x01},
{0x0096, 0x00},
{0x0097, 0xfd},
{0x00e3, 0x01},
{0x00e4, 0x03},
{0x00e5, 0x02},
{0x00e6, 0x01},
{0x00e7, 0x03},
{0x00f5, 0x02},
{0x00d9, 0x05},
{0x00db, 0xce},
{0x00dc, 0x03},
{0x00dd, 0xf8},
{0x009f, 0x00},
{0x00a3, 0x3c},
{0x00b7, 0x00},
{0x00bb, 0x3c},
{0x00b2, 0x09},
{0x00ca, 0x09},
{0x0198, 0x01},
{0x01b0, 0x17},
{0x01ad, 0x00},
{0x00ff, 0x05},
{0x0100, 0x05},
{0x0199, 0x05},
{0x01a6, 0x1b},
{0x01ac, 0x3e},
{0x01a7, 0x1f},
{0x0030, 0x00},
/* Recommended : Public registers - See data sheet for more detail */
{SYSTEM_MODE_GPIO1, GPIOx_SELECT_GPIO_INTERRUPT_OUTPUT << GPIOx_FUNCTIONALITY_SELECT_SHIFT}, /* GPIO1 configured as active low interrupt output */
should not be changed.*/
{SYSRANGE_VHV_REPEAT_RATE, 0xFF}, /* sets the # of range measurements after which auto calibration of system is performed */
{SYSRANGE_VHV_RECALIBRATE, 0x01}, /* perform a single temperature calibration of the ranging sensor */
/* Optional: Public registers - See data sheet for more detail */
{SYSRANGE_INTERMEASUREMENT_PERIOD, (READING_INTERVAL_MS/10U - 1U)}, /* Set ranging inter-measurement period */
{SYSTEM_INTERRUPT_CONFIG_GPIO, CONFIG_GPIO_INTERRUPT_NEW_SAMPLE_READY}, /* Configures interrupt on New range sample ready */
{SYSRANGE_THRESH_HIGH, 10},
{SYSTEM_INTERRUPT_CLEAR, INTERRUPT_CLEAR_ERROR|INTERRUPT_CLEAR_RANGING|INTERRUPT_CLEAR_ALS},
// end of VL6180x_Prepare
{SYSRANGE_START, MODE_START_STOP | MODE_CONTINUOUS}
};