Ticker/Timeout of mbed-os on mDot

[Jong-won Lee]

I make a code under mdot-library rev. 3.0.0 and mbed-os rev. 5.4.7.
When a Ticker or Timeout of mbed-os is used, interrupt is not activated.

I think that mdot-library may use the timer resource of STM32F411 MCU, which is used for Ticker or Timeout.

How can I use a Ticker or Timeout object on mdot-library and mbed-os?

[Jason Reiss]

Doc for mbed 5 can be found here.

https://os.mbed.com/docs/latest/reference/ticker.html
https://os.mbed.com/docs/latest/reference/timeout.html

[Jong-won Lee]

My question is not how to use Ticker or Timeout in mbed-os….

It seems that there is conflict between mbed-os and mdot-library.

Which timer module (TIMx) of STM32F411 MCU is used in mdot-library?

Can I change the timer module (TIMx) of STM32F411 used in mdot-library?

[Jason Reiss]

The library still uses RtosTimer. Have you tried using it?

[Jason Reiss]

Here is an example program: Ticker, Timer and RtosTimer all seem to work.
https://os.mbed.com/users/jreiss/code/Ticker_libmDot/

[Jong-won Lee]

I tested your example code, but the code is not working.

After the program starts, led1 is blinking.
But after 2 seconds (it seems to be at ticker timeout),
the led1 is not blinking, and it stops.

A problem seems to occur at the the first interrupt of the ticker.
(I think that your mDot library may affect the ticker of the mbed-os, that is, TIM5 module of STM32F411)

[Jason Reiss]

When I install the example as provided both LEDs are blinking.

On the UDK board
LED2 -> D3 (led1)
XBEE_RSSI -> D15 (led2)

[Jong-won Lee]

I solved my problem…

My problem occurs because my ISR of Ticker has send_data() of mDot library.

The send_data() seems to be use a Ticker or timeout interrupt, and so
a problem occurs if send-data() is used in an ISR of a Ticket/Timeout.

Thank you!

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