I2c + timer1 + timer2 + softdevice(S210)

RE: I2c + timer1 + timer2 + softdevice(S210)

angel — Thu, 09 Feb 2017 19:06:58 GMT

Ok I solved it after a few hours. The MPU is a bit slower than the ARM, and as I didnt develop any exception or timeout for I2C when the device is not present (or not initialized in this case), I was getting stuck when I was starting from 0V everything. Now I put a delay of 100ms in the beginning of ARM code and everything goes good. With more time, I'll develop some timeout for I2C and retrials.

Thanks Petter!

RE: I2c + timer1 + timer2 + softdevice(S210)

angel — Thu, 09 Feb 2017 13:55:49 GMT

I will try that in a couple of hours Petter. Thanks!

RE: I2c + timer1 + timer2 + softdevice(S210)

Petter Myhre — Thu, 09 Feb 2017 13:49:00 GMT

Just zip your complete project, edit the question and click the paper clip symbol. Does it help if you change APP_IRQ_PRIORITY_HIGH to NRF_APP_PRIORITY_LOW in twi_init()?

RE: I2c + timer1 + timer2 + softdevice(S210)

angel — Thu, 09 Feb 2017 13:43:21 GMT

How do you usually share projects over here?

Also I added my source file for I2C driver.

Thanks!

RE: I2c + timer1 + timer2 + softdevice(S210)

Petter Myhre — Thu, 09 Feb 2017 13:36:47 GMT

Thanks, but I still don't see how you are using the TWI peripheral. Please consider sharing your complete project.

RE: I2c + timer1 + timer2 + softdevice(S210)

angel — Thu, 09 Feb 2017 13:30:39 GMT

Added mpu_handle_timer_interrupt(). Sorry for indentation, spaces and tabs are mixing here... The project is becoming a bit big, a lot of files and everything, I will send it to you if we cannot find the problem easily through this functions... The function MPU6050_getMotion6(....) just reads some registers via i2c. I know that this function works outside the timer.

RE: I2c + timer1 + timer2 + softdevice(S210)

Petter Myhre — Thu, 09 Feb 2017 13:22:18 GMT

And what is happening inside mpu_handle_timer_interrupt()? You could also upload your complete project so I can test it here. Then you should let us know what SDK and SoftDevice version you are using.

RE: I2c + timer1 + timer2 + softdevice(S210)

angel — Thu, 09 Feb 2017 13:12:29 GMT

I edited my question with timers code.

RE: I2c + timer1 + timer2 + softdevice(S210)

Petter Myhre — Thu, 09 Feb 2017 12:48:16 GMT

What is it that doesn't work good? What happens? What interrupt priorities are you using? How are you using timer 1? How are you using the TWI peripheral?