vl53l5cx i2c address change

[BPutt.1]

Hi,

I have two vl53l5cx sensors in my system. I need to change (at least one) of the device addresses. I used the instructions from n UM2884, section 2.3, that is.

1. Power up the system.
2. Reset the sensor by LPn pin LOW, I2C_Reset HIGH, wait 500msec, LPn pin High, I2C_Reset LOW. wait 500msec.
3. LPn pin LOW of all bu the selected device.
4. Call vl53l5cx_set_i2c_address with the new address.
5. status |= platform.WrByte(config.vl53L5CX_Device, 0x7fff, 0x02); will result in 255.

What could be wrong here?

[Anne BIGOT]

Hello Bob,

I don't know what could be wrong but what I could suggest is to have a look to the code shared within the X-Cube-TOF1 package here and check for the MX_53L5A1_MultiSensorRanging_Init function description in the 53L5A1_MultiSensorRanging example. It could help to port the code.

Anne

static void MX_53L5A1_MultiSensorRanging_Init(void)

{

 uint8_t device;

 uint16_t i2c_addr;

 uint32_t id;

 /* Initialize Virtual COM Port */

 BSP_COM_Init(COM1);

 printf("53L5A1 Multi Sensor Ranging demo application\n");

 reset_all_sensors();

 /* Turn off all the sensors */

 for (device = 0; device < RANGING_SENSOR_INSTANCES_NBR; device++)

 {

  write_lowpower_pin(device, GPIO_PIN_RESET);

 }

 /* initializes each device and put it in low power mode */

 for (device = 0; device < RANGING_SENSOR_INSTANCES_NBR; device++)

 {

  /* enable only one sensor */

  write_lowpower_pin(device, GPIO_PIN_SET);

  HAL_Delay(2);

  status = VL53L5A1_RANGING_SENSOR_Init(device);

  if (status != BSP_ERROR_NONE)

  {

   printf("VL53L3A2_RANGING_SENSOR_Init %d failed\n", device);

   ToF_Present[device] = 0; /* device not detected */

  }

  else

  {

   ToF_Present[device] = 1; /* device detected */

  }

  write_lowpower_pin(device, GPIO_PIN_RESET); /* turn off the device */

 }

 /* power on the devices one at a time and change their address

  * once the address is updated, the communication with the devices is checked

  * reading its ID.

  */

 for (device = 0; device < RANGING_SENSOR_INSTANCES_NBR; device++)

 {

  /* skip the sensor if init not successful */

  if (ToF_Present[device] == 0) continue;

  /* turn on the device */

  write_lowpower_pin(device, GPIO_PIN_SET);

  /* left: 0x54, center: 0x56, right: 0x58 */

  i2c_addr = (RANGING_SENSOR_VL53L5CX_ADDRESS + (device + 1) * 2);

  VL53L5A1_RANGING_SENSOR_SetAddress(device, i2c_addr);

  /* check the communication with the device reading the ID */

  VL53L5A1_RANGING_SENSOR_ReadID(device, &id);

  printf("ToF sensor %d - ID: %04lX\n", device, (unsigned long)id);

 }

}