GPIO_ULTRASOUND_xxx not defined. Driver not supported

Pixhawk
1

I’m trying to add in the SRF05 Ultrasonic driver but, I’m getting the following error “GPIO_ULTRASOUND_xxx not defined. Driver not supported.” Where/How do I set the defines for GPIO_ULTRASOUND_TRIGGER and GPIO_ULTRASOUND_ECHO? There is no information on how to use this driver.

2

suggestion:
USE a cheap microcontroller with uart support(eg. - arduino ).
once you get distance reading : send it over serial to your flight controller

this is beacause you can fake uart communication to fit in existing drivers. :slight_smile:
Eg - read page no. 6 of:
https://www.sgbotic.com/products/datasheets/sensors/DE-LiDAR%20TFmini%20Datasheet-V1.7-EN.pdf

3

I’ll give it a look. Thanks…

4

How does the FC read the output, if an esp32 is used?

5

I updated board_config.h with:

#define GPIO_ULTRASOUND_TRIGGER  /* PTD0 */  (GPIO_SWDIO | GPIO_OUTPUT_SET | GPIO_PORTE | GPIO_PIN14)
#define GPIO_ULTRASOUND_ECHO     /* PTA10 */ (GPIO_PULLUP | GPIO_INPUT | GPIO_PORTD | GPIO_PIN15)

At least now firmware builds. I’m not sure if this is correct or not.

6

Still not working… Not sure how to actually enable the GPIO pins

7

Is it possible to access the GPIO pins on PixHawk 6C using PX4? If so, how is it possible?

8

While I’ve been waiting for a reply, I began experimenting with ArduPilot and within 15 minutes I was able to connect the sonar sensor via GPIO. So, I no longer need to sort out I2C. Looks like ArduPilot is the answer I needed