Posts made by Peter VW

Thank you, then we will take a look into this.
For now, a simple RC circuit works.

Hello,

I'm currently working on a reset pin for our hardware. Currently it's connected to GPIO 53 (on J3 pin 9)

I would like this pin to be zero (instead of default HIGH). Currently i did it with a init script. But this runs after the initial value of input pullup.

Is there an easy way to make this happen? At default we would like this pin to be OUTPUT and LOW.

Thank you in advance.

@modaltb thank you for your answer.

For so far I can see my program is the same. I'll take some more indepth look when I'm at work again.

Is there some .so file I've got to include in my cmakelist?

I've already tried every possible combination that's out there. Hope we can fix this soon.

Thank you for your awnser.

Since some time there is an repo, and a package in dev, that should be working with the I2C.
For now what I did last days:

• Testen with i2cdump (and some other command line commands) the connection. It works perfectly
• When using the write commando in C everything works correctly.
• as soon i send the read commando i receive error 107: Transport endpoint is not connected

Maybe you guys know a fix. I've tried everything I can think off and can find on the internet.

A part of the read code:

	ret = write(i2c[bus].fd, &regAddr, 1);
	if(unlikely(ret!=1)){
		fprintf(stderr,"ERROR: in corvus_i2c_read_bytes, failed to write to bus\n");
		i2c[bus].lock = old_lock;
		return -1;
	}
    // uint8_t message[1] ;

	ret = read(i2c[bus].fd, data, count);
	if(unlikely((size_t)ret!=count)){
		perror("ioctl(I2C_RDWR) in i2c_read");
		// fprintf(stderr,"ERROR: in corvus_i2c_read_bytes, received %d bytes from device, expected %d\n", ret, (int)count);
		i2c[bus].lock = old_lock;
		return -1;
	}

I used your libio repo for implementation: https://gitlab.com/voxl-public/voxl-sdk/core-libs/libqrb5165-io/-/blob/master/library/src/i2c.c

Hello everyone,

Currently I'm working on the I2C communication with some of our own hardware using the I2C lib from modalai.

Sending data to our hardware works great and the hardware is acting correctly to it.

But when we need to read from the hardware the following happens (debugged on hardware):

• The first message, as expected, come in correctly. The message tells me what I want to read and I set a flag.
• After the message was read successfully the microcontroller doesn't receive any data anymore.
• In the terminal of the VOXL2 is an error telling me that it's expecting 12 bytes from slave but received -1 (so, the linux I2C program returns an -1 error)

When I'm using a terminal program for sending en receiving data from the I2C bus, everything works correctly.

I use the voxl_i2c_read_bytes library tool like the sourcecode explains.

We open the I2C connection with voxl_i2c_init and we're using port 0.

We're running the dev version of the software with the newest system image.