ANT Forum

I used MSP430 connecting with ANT. (UART)
i set sleep signel always low and suspend always light.
it means i can send message to Ant any time, right?
so RTS is always low.

RTS is low before i reseted ANT.
After i reseted ANT using the reset pin, RTS is low too.
( I did take delay before and after i reseted ANT )
Than i send message to Ant (A4, 03, 46, 00, 10, 00, F1)(Assign Ch.)
But i didn't get any RTS de-asserted even thought i took delay after the message had been send.
(I also tried the reset message(A4, 01, 4A, 00, EF), but it still didn't work)

Is that possible because i took delay too long??      

When using UART, setting SLEEP to low and SUSPEND to high disables the sleep functionality, so you can send messages to ANT at any time as long as RTS is high. RTS is controlled by ANT, and will be raised to indicate that ANT's buffers are full and the host should stop sending messages to it.

After you send a correctly formatted message to ANT, you should see RTS being de-asserted for approximately 50us right after the last byte of the message.

Are you using the reset pin to reset ANT? Could you please post schematics of your connections?