# Atmel Studio : twi busy problem with FREERTOS\_USED symbol 

**URL:** <https://forums.freertos.org/t/atmel-studio-twi-busy-problem-with-freertos-used-symbol/6052>\
**Category:** Kernel\
**Created:** [July 20, 2016, 2:44pm UTC](https://forums.freertos.org/t/atmel-studio-twi-busy-problem-with-freertos-used-symbol/6052 "2016-07-20T14:44:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![system](https://d2v6vdsk2p900z.cloudfront.net/original/1X/7fc8fdb729c645aab5b20282bbe34e57cb407be6.jpeg) [@system](https://forums.freertos.org/u/system)\
**Post date:** [July 20, 2016, 2:44pm UTC](https://forums.freertos.org/t/atmel-studio-twi-busy-problem-with-freertos-used-symbol/6052/1 "2016-07-20T14:44:54Z")

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**[bou6](https://sourceforge.net/u/bou6/)** wrote on [Wednesday, July 20, 2016](https://sourceforge.net/p/freertos/discussion/382005/thread/7a73b34b/#8ec0):

I’am using Atmel Studio version 7.0.1006 and AT32UC3A0512, If i pass FREERTOS\_USED to the compiler the calls to `twi_master_write` has caused blocking, i find a hack to ASF Twi API in this link :  
[http://www.avrfreaks.net/forum/twi-problem-home-made-board-at32uc3a0512](http://www.avrfreaks.net/forum/twi-problem-home-made-board-at32uc3a0512)

but the problem remains. does anyone encounter the same problem

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**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [July 20, 2016, 2:47pm UTC](https://forums.freertos.org/t/atmel-studio-twi-busy-problem-with-freertos-used-symbol/6052/2 "2016-07-20T14:47:56Z")

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**[rtel](https://sourceforge.net/u/rtel/)** wrote on [Wednesday, July 20, 2016](https://sourceforge.net/p/freertos/discussion/382005/thread/7a73b34b/#8ec0/4e74):

Sorry - I’m not familiar with these Atmel drivers.