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pekka1234
Joined: 28 May 2017
Posts: 83
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| How to get VL53L0x working? |
 Posted: Tue May 10, 2022 6:22 am |
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I have tried for two weeks to get the ST VL53L0x Time of Flight device working on CCS-complier and PIC.
I have looked at this service. no help.
I have written to ST, but no help.
They only give a link to other language.
I need this sensor for my snow meter.
I have done a very simple test circuit and it will give output to the serial port.
The device is here http://probyte.fi/VL530X.jpg
It is cheap, it I got it working
A schematic is here http://probyte.fi/VL53L0XSchematic.jpg
It has a PIC16F18857 cpu.
I have modified ST made program, so that it works with CCS (version 5.092).
I have checked that address is normal 0x52. with I2C_scanner.c
I have put my revised code to http://probyte.fi/VL53L0z.zip
What I got is here http://probyte.fi/VL530XTest.jpg
So it will give a big distance, but then it goes to 0.
So I ask if any others have used CCS in the VL53L0X device.
Regards
Pekka Ritamaki |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu May 12, 2022 2:35 am |
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| Pekka1234 wrote: |
I have tried for two weeks to get the ST VL53L0x Time of Flight
device working on CCS compiler and PIC.
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Post a table of the results you would expect vs. the results you get.
Example: The VL53L0X can measure distances up to 2 meters away.
Post a table similar to below:
| Code: |
True Measured
Object distance with
distance my circuit
(mm) (mm)
100 50
200 60
300 70
400 80
500 100
1000 300
1500 550
2000 800
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You can put in more true distance values in the table if you think it
will help us.
Also give us a link to the ST program that you converted to CCS.
Also, what is the Vdd voltage of your PIC ? |
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pekka1234
Joined: 28 May 2017
Posts: 83
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| VL53L0X |
| Posted: Thu May 12, 2022 11:02 am |
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PCM programmer, thank you for the first answer to VL53L0X question.
I tried to take results, but I got only these results:
| Code: |
Object distance The result
[mm]
=======================
50 mm = 59392, 2307. 3. 0, 0, 0, 0, 0
100mm = 59392, 2307, 3. 0, 0, 0, 0, 0
150mm = 59392, 2307, 3. 0, 0, 0, 0, 0
300mm = 59392, 2307, 3. 0, 0, 0, 0, 0
400mm = 59392, 2307, 3. 0, 0, 0, 0, 0
1000mm = 59392, 2307, 3. 0, 0, 0, 0, 0
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So there were no questions about the distance, the result goes to 0 after a few seconds.
I know that it is my fault, but the code is so big.
==
The program is what ST recommend to me when I asked for help.
It was not CCS program.
The program is one of ST examples
I have to modify it, maybe I have done something wrong?
== The first rows of ST program ====
Copyright (c) 2021, STMicroelectronics - All Rights Reserved
*
* This file is part of the VL53L4CD Ultra Lite Driver and is dual licensed,
==== A bit later
This example shows how to get single-shot range
measurements from the VL53L0X. The sensor can optionally be
configured with different ranging profiles, as described in
the VL53L0X API user manual, to get better performance for
a certain application. This code is based on the four
VL53L4CD ULD ready !
==
The PIC16F18857 is enough
This is what I got after compiler:
Compiling D:\PIC\2022\ST32\TestST on 12-touko-22 at 12.38
Memory usage: ROM=11% RAM=1% - 4%
0 Errors, 0 Warnings.
Build Successful.
====
Then you ask about the voltage of my test circuit.
I used 5V was a seller (Aliexpess) said.
I could use also 3.3V if you suggest.
==
Then I modified my program and got this result:
VL53L4CD starting
VL53L4CD_IDENTIFICATION__MODEL_ID =0F DEV 2e
sensor_id 8000 status FF
52VL53L4CD not detected at requested address
VL53L4CD_IDENTIFICATION__MODEL_ID =0F DEV 19
VL53L4CD not detected at requested address 52
VL53L4CD ULD Loading failed
VL53L4CD ULD ready !
Sensor runs in autonomous mode
VL53L4CD_StartRanging !
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
status=ff, isReady= 00, loop 0 Distance = 22272 sigma_mm 5568
==
This program doesn't find itself in 0x52 address.
VL53L4CD is not compatible with my VL53L0X device.
==
I have started to read VL53L0X datasheet and started to write code.
It is quite difficult to write the right code.
==
I checked that I have the right address with I2C-scanner
Start I2C Scanner..
ACK addr: 0x52
Number of i2c chips found: 1
===
I know how difficult is to give the right help.
Regatds
Pekka Ritamaki |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Re: VL53L0X |
| Posted: Thu May 12, 2022 12:03 pm |
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| pekka1234 wrote: |
50 mm = 59392, 2307, 3. 0, 0, 0, 0, 0
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What do these numbers mean ? Is 59392 the raw result from the
sensor ? is 2307 the result after calculations ? What is it supposed
to represent ? You have got to give us some explanations of these
numbers if you want help.
| pekka1234 wrote: |
So there were no questions about the distance
|
What does this mean ?
| Quote: | the result goes to 0 after a few seconds.
|
Does this mean that the 59392 value goes to 0 ?
How many seconds does it take for it to go to 0 ?
This sounds like a hardware problem. Like maybe the VL53L0X is
counterfeit, or maybe there's a power supply problem.
| pekka1234 wrote: |
The program is what ST recommend to me when I asked for help.
It was not CCS program.
== The first rows of ST program ====
Copyright (c) 2021, STMicroelectronics - All Rights Reserved
|
Why can't you post a link to the code ? Did you have to sign an
NDA (non-disclosure) agreement to get it ? If so, tell us that ! |
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PrinceNai
Joined: 31 Oct 2016
Posts: 480
Location: Montenegro
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| Posted: Thu May 12, 2022 12:59 pm |
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I lost (wasted) a month translating the code for this sensor and at the end the result was terrible. You can find my efforts here:
https://www.ccsinfo.com/forum/viewtopic.php?t=56925&highlight=vl53l0x
Way, way too complicated piece of hardware, nothing but trouble. If you don't need a snowflake accuracy, there must be other sensors. |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Wed May 18, 2022 4:01 pm |
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I was able to get it working.
I bought the Adafruit VL53L0X board on Amazon. I connected it to a
PicDemPlus development board. I used pin C3 for SCL, and pin C4 for SDA.
I also connected it to +5v and Ground on the board.
I downloaded the 3 source files for a VL53L0X driver for CCS from here:
https://github.com/LILCMU/vl53l0x-ccs
The VL53L0X.c and VL53L0X.h files are unchanged.
I edited their SINGLE.c file to look like this:
| Code: | #include <18F46K22.h>
#fuses NOWDT
#use delay(internal=8M)
#use rs232(baud=9600, UART1, ERRORS)
#use i2c(Master, I2C1, SLOW)
int32 msTimer=0;
#define millis() (msTimer)
#include <VL53L0X.h>
#include <VL53L0X.c>
#int_timer1
void timer1_isr(void)
{
set_timer1(65286); // keep period at 1 ms (at 8 MHz)
msTimer++;
}
// Uncomment this line to use long range mode. This
// increases the sensitivity of the sensor and extends its
// potential range, but increases the likelihood of getting
// an inaccurate reading because of reflections from objects
// other than the intended target. It works best in dark
// conditions.
#define LONG_RANGE
// Uncomment ONE of these two lines to get
// - higher speed at the cost of lower accuracy OR
// - higher accuracy at the cost of lower speed
//#define HIGH_SPEED
#define HIGH_ACCURACY
void setup_VL53L0X(void)
{
printf("Starting\r\n");
init();
setTimeout(200);
#if defined LONG_RANGE
// lower the return signal rate limit (default is 0.25 MCPS)
setSignalRateLimit(0.1);
// increase laser pulse periods (defaults are 14 and 10 PCLKs)
setVcselPulsePeriod(VcselPeriodPreRange, 18);
setVcselPulsePeriod(VcselPeriodFinalRange, 14);
#endif
#if defined HIGH_SPEED
// reduce timing budget to 20 ms (default is about 33 ms)
setMeasurementTimingBudget(20000);
#elif defined HIGH_ACCURACY
// increase timing budget to 200 ms
setMeasurementTimingBudget(200000);
#endif
}
//==============================
void main()
{
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);
set_timer1(65286); // keep period at 1 ms (at 8 MHz)
enable_interrupts(INT_TIMER1);
enable_interrupts(GLOBAL);
setup_VL53L0X();
while(TRUE)
{
printf("%lu\r\n", readRangeSingleMillimeters());
if(timeoutOccurred())
printf(" TIMEOUT\r\n");
delay_ms(500);
}
}
|
I compiled the files with CCS vs. 5.108.
Here are the test results. There is an offset of about 60 when it should
read 0 mm.
64 // Starting with sensor close to the desk surface.
61
54
71 // Then slowing raising the sensor above the desk
69
68
88
102
130
147
161
167
184
200
229
246
265
279
294
310
326
345
359
374 // Now at about 12 inches (305 mm) above the desk
358
339
326 // Slowly lowering the sensor
305
273
249
213
186
158
133
119
101
85
82
80
73
63
65
58
70
64 // Sensor is now back down at the desk level
Test board:
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pekka1234
Joined: 28 May 2017
Posts: 83
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| Fine PCM Programmer! |
| Posted: Thu May 19, 2022 1:14 pm |
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Hurraa, I got VL53L0X finaly working.
I modified a little single.c file and
VL53L0x.c a little
#separate boolean init2() to int1 boolean init2()
I also changed in each file
#include<VL53L0X.h>"
#include <VL53L0X.c>
to
#include "VL53L0X.h"
#include "VL53L0X.c"
A new Single.c code is here
| Code: |
//#include <18F46K22.h>
#include <16F18857.h>
#fuses NOWDT
#use delay(internal=8M)
#pin_select U1TX = PIN_C6 // RS232 uses C6 as tx
#pin_select U1RX = PIN_C7 // RS232 uses C7 as rx
#use rs232(baud=9600, UART1, ERRORS)
#pin_select SCL1OUT=PIN_C3 // I2C uses CLK as C3
#pin_select SDA1OUT=PIN_C4 // I2C uses DTA as C4
//#USE I2C(I2C1, MASTER,SLOW, FORCE_HW) // normal I2C functions
#use i2c(Master, I2C1, SLOW)
int32 msTimer=0;
#define millis() (msTimer)
#include "VL53L0X.h"
#include "VL53L0X.c"
#int_timer1
void timer1_isr(void)
{
set_timer1(65286); // keep period at 1 ms (at 8 MHz)
msTimer++;
}
// Uncomment this line to use long range mode. This
// increases the sensitivity of the sensor and extends its
// potential range, but increases the likelihood of getting
// an inaccurate reading because of reflections from objects
// other than the intended target. It works best in dark
// conditions.
#define LONG_RANGE
// Uncomment ONE of these two lines to get
// - higher speed at the cost of lower accuracy OR
// - higher accuracy at the cost of lower speed
//#define HIGH_SPEED
#define HIGH_ACCURACY
void setup_VL53L0X(void)
{
printf("Starting\r\n");
init();
setTimeout(200);
#if defined LONG_RANGE
// lower the return signal rate limit (default is 0.25 MCPS)
setSignalRateLimit(0.1);
// increase laser pulse periods (defaults are 14 and 10 PCLKs)
setVcselPulsePeriod(VcselPeriodPreRange, 18);
setVcselPulsePeriod(VcselPeriodFinalRange, 14);
#endif
#if defined HIGH_SPEED
// reduce timing budget to 20 ms (default is about 33 ms)
setMeasurementTimingBudget(20000);
#elif defined HIGH_ACCURACY
// increase timing budget to 200 ms
setMeasurementTimingBudget(200000);
#endif
}
//==============================
void main()
{
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);
set_timer1(65286); // keep period at 1 ms (at 8 MHz)
enable_interrupts(INT_TIMER1);
enable_interrupts(GLOBAL);
setup_VL53L0X();
while(TRUE)
{
printf("%lu\r\n", readRangeSingleMillimeters());
if(timeoutOccurred())
printf(" TIMEOUT\r\n");
delay_ms(500);
}
} |
I tested with hand and the results is here
http://probyte.fi/ExceltestLX53L0X.jpg
I worked from 50mm to 1700 mm from table to roof quite well.
My prototype is here
http://probyte.fi/tesstVL53L0X.jpg
Thank much PCM Programmer. You a really a good fellow!
http://probyte.fi/ExceltestLX53L0X.jpg
How you add img* file ?
Regards
Pekka Ritamaki |
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PCM programmer
Joined: 06 Sep 2003
Posts: 21708
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| Posted: Thu May 19, 2022 6:46 pm |
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You're right. I forgot that I had to remove the #separate statements to
make it compile.
To post an image on this forum, upload it to a free image hosting service
such as https://imgbb.com
Then tell it create a link for a forum. They usually have a button to do that.
Then post the link in this forum. |
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