bitbank2 / vl53l0x Goto Github PK

I can't get the demo code to work on my Raspberry Pi. I changed the main.c file already to i = tofInit(1, 0x29, 1). The application always exits with -1 because the function static int initSensor(int bLongRangeMode) returns a 0. Should the GPIO Pin be connected to the Raspberry?

the sensor and my i2c interface should be ok:
root@raspberrypi:~/VL53L0X# i2cdetect -y 1

0 1 2 3 4 5 6 7 8 9 a b c d e f
00: -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- 29 -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

AIM: Work with the 4-VL53L0X sensor using 1-I2C communication on BeagleBone Black.

I implement your contribution in BeagleBone Black for Single VL53L0X.

But in My Application, I use 4 VL53L0X sensors.

And the issue is all VL53L0X have the same Slave Address 0x29.

So, I think if I am able to change I2C Slave Address in VL53L0X then is Work.

Thank you.

Aim: C program to get VL53L0X sensor data using I2C communication in BeagleBone Black.

I am working with BeagleBone Black to get data from VL53L0X. I need help to the Made a header file and source file for that.

I think @bitbank2 your Contribution is near to my solution. So you help me with how I implement in BeagleBone Black.

Issue:

1. How to install the library.
2. which method to compile the c code.
3. how many changes I make in code. (like pin number, i2c bus.).

Thank you.

Hello,
I have done some modifications to the library.
Now it can be compiled as shared library (.so).
More, I have added two functions: tofStartReadDist start a new reading and soon return to caller; tofReadDistanceAsync read the distance without any initial waiting cycle. That is, the reading is non blocking.
Using these functions a caller program can do other processing in the reading interval required by the device. The caller first call tofStartReadDist, then is responsible to call tofReadDistanceAsync after the minimum required interval to complete the reading operation, 200 ms or more.
Attached there is also a simple test program.
Hoping this will be useful

Giandomenico De Sanctis

VL53L0X-nowait-sharedlib.zip

https://github.com/adafruit/Adafruit_VL53L0X/blob/master/src/core/src/vl53l0x_api.cpp

#define VL53L0X_REG_I2C_SLAVE_DEVICE_ADDRESS 0x008a

VL53L0X_WrByte(Dev, VL53L0X_REG_I2C_SLAVE_DEVICE_ADDRESS,
DeviceAddress / 2);

Hi, this is not really a problem in the code if we only consider its original purpose, however, the use of the Linux write() function, especially in the context of the function writeRegList(), makes it very hard to port to non-Linux microcontrollers.

The difficulty arises from the fact that whenever one is using I2C libraries such as the ones provided inside of ASF (Atmel/Microchip) it is not possible to start a transaction without sending first the address, or, it is not possible to avoid (or hold) the sending of a NACK.
Unfortunately, I only observed such incompatibility after a few days of work.

In any case, thank you for your time and desire to help others.

the include paths are correct however ioctl.h is somehow not detected while compiling