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08 March 2012 10:18 PM

cal Newbie

Total Posts: 4

Joined 2010-07-23

Hi,

I am trying to change chip solutions from the NRF24AP2 to the CC2570. I am using the same low level serial functions in byte sync mode that I had successfully used with the NRF24AP2, but am not having the same luck with the cc2570. I have configured all of the pins the same and designed the circuit to match the reference design by TI.

The SEN line is pulled down and only pulses with a reset, which seems correct. The SEN and SCLK lines are inactive when a SRDY is applied. I have seen a function for enabling an external crystal (ANT_crystalEnable()) is this required for the CC2570?

Any other ideas would be helpful as well,

Thanks

09 March 2012 03:15 PM #1

rizopoulos Sr. Member

Total Posts: 213

Joined 2011-05-02

PM

Hello,

You shouldn't have to use ANT_EnableCrystal to turn your crystal on.
Would you be able to provide timing diagrams so that I can have a better understanding of what the problem might be?

Cheers

Kassandra

09 March 2012 03:34 PM #2

cal Newbie

Total Posts: 4

Joined 2010-07-23

PM

Attached is the startup timing. [file name=antTime.zip size=56322]http://www.thisisant.com/images/fbfiles/files/antTime.zip[/file]

09 March 2012 04:23 PM #3

rizopoulos Sr. Member

Total Posts: 213

Joined 2011-05-02

PM

Would you be able to provide the schematic that you're working off of. Also, are you using the reset pin, a power up, or a soft reset to reset your device?

12 March 2012 09:22 AM #4

Johnny Ringo Sr. Member

Total Posts: 523

Joined 2012-11-15

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Attached is the schematic that I am working from.

I am using the reset pin and doing a hard reset followed by a soft reset.

12 March 2012 09:26 AM #5

cal Newbie

Total Posts: 4

Joined 2010-07-23

PM

Heres the schematic. [file name=cc2570.pdf size=24131]http://www.thisisant.com/images/fbfiles/files/cc2570.pdf[/file]

13 March 2012 03:35 PM #6

rizopoulos Sr. Member

Total Posts: 213

Joined 2011-05-02

PM

In your schematic, it looks as though your reset pin is not connected to anything, but you say that you are using it. Can you please provide your reset pin circuitry?

ANT Forum

cc2570 and external crystal