Control GPIO Pins and How to change HOP time

Question

Hi, 
 I have been following Frequency example 2 on page 346 in the user guide. 
 in this example, how is the Hop table indexing and the hops being triggered? 
 How can i control the hop time, for example i wanted it to change frequency every 100ms? 
 what is the difference between using GPIO to control Gain and attenuation VS Table index control to GPIO Mode and using a Table index sequence? 
 I have attached the my TES setup profile. 
 TES Profile.zip 
 Thank you

RahulMushini · Accepted Answer

Hi, 
 Coming to control the HOP timing, if we are using the DGPIO for controlling the table index then it&rsquo;s up to the user to generated the required signals to toggle the PIN so that it meets the requirement of 100ms, one way to do that is to enable the Auto TDD option under the Automated TDD tab and provide appropriate clock value for the assert and deassert so that the HOP table increment automatically for every 100ms or scripts can be used to toggling the pin 
 Please find the explanation below 
 Lets divide the explanation into three section, 
 Section 1: HOP signal, TX/RX Pin Enable 
 
 This section will explain how the HOP signal in combination with the TX and RX Enable pin are utilized. The two signal HOP and TX/RX signal will allow you to either select the TX channel or Rx channel. As you can see from the above figure we are using HOP mode a PPL MUX retune, so when the HOP signal is low-to-high/high-to-low and the TX pin is high then the TX channel is enabled and on the other hand when the HOP signal is low-to-high/high-to-low and RX pin is high then the RX channel is selected. One has to note that the effect will be reflected in the next fame. Since for the table index to increment the HOP signal can be from low-to-high and high-to-low along with the TX and RX enable pin, the time between the HOP signal from low-to-high and high-to-low has to be kept long enough by the user to meet the timing requirement of changing the frequency in your case its 100ms. 
 
 Section 2: HOP Table Increment Indexing using PIN 
 This section will explain how the entries within the table is increment using the PIN (DGPIO) 
 
 We can assign up to 6 DGPIO for selecting 64 (2^6) possible index within the HOP table. The DGPIO has to be set high or low based on the index before the HOP is triggered, so that it will increment in the next frame. 
 Section 3: Gain and Attenuation control 
 Similar to the section 2, adrv9001 allows to select the pin (DGPIO) for controlling the gain and attenuation. This is done by enabling &ldquo;GPIO control of Gain and Attenuation&rdquo; , then assigning the DGPIO pin and based on the code you can assign DGPIO pin high or low for the respective attenuation and gain as shown below

Please have a look at the recently updated user guide ( https://www.analog.com/media/en/technical-documentation/user-guides/adrv9001-ug1828.pdf ) for knowing more about the Auto TDD and Frequency Hopping section. 
 Regards 
 Rahul)

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Control GPIO Pins and How to change HOP time