The sensor is pretty complicated, but the I2C is not. It needs power, ground, and an I2C. And you need to lift the LPn pin. I'm betting it the LPn pin. Essentially, this pin enables the I2C. That app note tells you to connect the pin, but does not provide much in the way of protocol. It assumes you are using the ST provided software.
When you get the ACK, try this bit of code:
/* --------------------------------------------------
* --- This function can be used to test VL53L5CX I2C
* --------------------------------------------------
*/
uint8_t vl53l5cx_test_i2c(VL53L5CX_Configuration *p_dev){
uint8_t status = VL53L5CX_STATUS_OK;
printf("Starting VL53L5CX I2C test...\n");
/* To check the I2C RdByte/WrByte function :
* Inside the function “vl53l5cx_is_alive()”, it will call I2C RdByte/WrByte to
* read device and verion ID. which can help you to verify the I2C RdByte/WrByte
* functions at same time.
*/
uint8_t device_id, revision_id;
status |= WrByte(&(p_dev->platform), 0x7fff, 0x00);
status |= RdByte(&(p_dev->platform), 0, &device_id);
status |= RdByte(&(p_dev->platform), 1, &revision_id);
status |= WrByte(&(p_dev->platform), 0x7fff, 0x02);
if(status)
{
printf("Error Rd/Wr byte: status %u\n", status);
return status;
}
/* To check the I2C RdMulti/WrMulti function:
* Below is example codes which can help you vefify the I2C RdMulti/WrMulti
* function.
*/
uint8_t Data_write[4]={0x5A,0xA5,0xAA,0x55};
uint8_t Data_read[4]={0,0,0,0};
uint8_t Data_default[4]={0,0,0,0};
status |= RdMulti(&(p_dev->platform), 0x100, Data_default, 4);
if(status)
{
printf("Error RdMulti: status %u\n", status);
return status;
}
printf("Read default value and save it at begging\n");
printf("Data_default (0x%x)\n", Data_default[0]);
printf("Data_default (0x%x)\n", Data_default[1]);
printf("Data_default (0x%x)\n", Data_default[2]);
printf("Data_default (0x%x)\n", Data_default[3]);
status |= WrMulti(&(Dev.platform), 0x100, Data_write, 4);
if(status)
{
printf("Error WrMulti: status %u\n", status);
return status;
}
printf("Writing values 0x5A 0xA5 0xAA 0x55\n");
status |= RdMulti(&(p_dev->platform), 0x100, Data_read, 4);
if(status)
{
printf("Error RdMulti: status %u\n", status);
return status;
}
printf("Reading:\n");
printf("Data_read (0x%x)\n", Data_read[0]);
printf("Data_read (0x%x)\n", Data_read[1]);
printf("Data_read (0x%x)\n", Data_read[2]);
printf("Data_read (0x%x)\n", Data_read[3]);
status |= WrMulti(&(Dev.platform), 0x100, Data_default, 4);
printf("Write back default value\n");
if(status)
{
printf("Error WrMulti: status %u\n", status);
return status;
}
status |= RdMulti(&(Dev.platform), 0x100, Data_default, 4);
if(status)
{
printf("Error RdMulti: status %u\n", status);
return status;
}
printf("Read value again to make sure default value was correct loaded\n");
printf("Data_default (0x%x)\n", Data_default[0]);
printf("Data_default (0x%x)\n", Data_default[1]);
printf("Data_default (0x%x)\n", Data_default[2]);
printf("Data_default (0x%x)\n", Data_default[3]);
printf("I2C test done - everything works fine.\n");
return status;
}
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