VL53L0x naive usage

[Jean-Daniel Nicoud]

Thanks for the messages found here.
I made The VL53L0x work using the Dave Meyer Arduino program. I then selected bunch of registers in a loop and looked at the data given by the registers. Several depends on the distance, the best is at address 30,31.
The program that seems to be usable, I just tested with a new module I got from china is
  7bit I2C address is 0x29
  As set.up, register 0 must receive value 1
  In the loop, read word from register 30 and 31 (decimal). Th'at' all!
  Distance given is ~1 per mm, 525 for 50cm, 2000 for ~2 meters
Min value is 20. That value is more or less frequent depending on the reflecting surface.
Jitter is 1-5%
When will a simple doc be available? STS is really strange with this circuit.

[Jon Watte]

Sounds like fun!

I imagine your goal is to use less code than the full library?

https://github.com/adafruit/Adafruit_VL53L0X/tree/master/src

Sincerely,

jw

Sincerely,

Jon Watte


--
"I find that the harder I work, the more luck I seem to have." -- Thomas Jefferson

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[RP6conrad]

I translated the Arduino C++ lib to a simple C-lib for this sensor. You still need to adapt the I2C and the millis() functions to your µ. I use this with the STM32 F100 discovery board. The sensor seems to work OK, indoor with the standard settings the range is 1200 mm on a White wall. There is a setting "Long Range", which would give you a 2000 mm range.

Initialisation (VL53_0 is the choosen I2C-adress, B0/B2 are the XShutdown-pins of the VL53) : 

 B0_OFF;B2_OFF;delay(10); //VL53_2 actief XSDN hoog maken !!!

   VL53L0X_setAddress(VL53_0); //VL53_0 adres veranderen naar 0Xterwijl VL53_1/2 in reset zijn

   B0_ON;delay(10);//VL53_1 adres VL53_1 veranderen en daarna init

   VL53L0X_setAddress(VL53_1);//VL53_1 nieuw adres geven

   B2_ON;delay(10);//VL53_2 inschakelen, deze houdt 0X52 als adres !!

   //VL53_0  init

   VL53L0X_Active_slave(VL53_0);

   VL53L0X_init(true);

   VL53L0X_setTimeout(250);

   VL53L0X_startContinuous(0);

   //VL53_1  init

   VL53L0X_Active_slave(VL53_1);

   VL53L0X_init(true);

   VL53L0X_setTimeout(250);

   VL53L0X_startContinuous(0);

   //VL53_2  init

   VL53L0X_Active_slave(VL53_2);

   VL53L0X_init(true);

   VL53L0X_setTimeout(250);

   VL53L0X_startContinuous(0);

Read out in the loop : 

void Task_VL53L0X(void){

if(VL53_timer>=VL53_timing_budget){

VL53_timer=0;

VL53L0X_Active_slave(VL53_0);

vl53_2=VL53L0X_readRangeContinuousMillimeters();//opgelet, blocking indien meting niet klaar !!!

VL53L0X_Active_slave(VL53_1);

vl53_1=VL53L0X_readRangeContinuousMillimeters();//opgelet, blocking indien meting niet klaar !!!

VL53L0X_Active_slave(VL53_2);

vl53_0=VL53L0X_readRangeContinuousMillimeters();//opgelet, blocking indien meting niet klaar !!!

}

Op vrijdag 8 september 2017 15:06:45 UTC+2 schreef Jean-Daniel Nicoud: