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nRF5SDK1702d674dde radio_test example question

hi，i use radio_test example for radio test.If I don't make any changes, the routine can run well, but a PA chip is added to my product to amplify the RF signal. The PA / LNA chip has two control pins pin16 and pin21. When transmitting, it is necessary to pull pin16 (TX) high and pin21 low. If I do not configure these two pins, the measured waveform is normal, but if I configure these two pins as output, and pull pin16 high and pin21 low during main initialization (because I only need to test). The measured RF waveform becomes very messy. I initially suspect that this pin pin16 is used in the routine, resulting in the abnormal operation of PA. But I can't find anywhere in the code to control this pin. Can you help me confirm whether this pin is used in this routine? The chip I use is Nordic 52832

thanks ,

0 user108467 over 4 years ago

added .i use start tx modulated carrier cmd for test，start channel = 0 ,end channel = 0,data_rate = ble_2Mbit
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0 user2115 over 4 years ago

Hi,

Q1: Which nRF5 SDK version are you using?

Q2: What do you mean by "messy" ? Can you share an image of before and after?

but if I configure these two pins as output, and pull pin16 high and pin21 low during main initialization (because I only need to test). The measured RF waveform becomes very messy. I initially suspect that this pin pin16 is used in the routine, resulting in the abnormal operation of PA. But I can't find anywhere in the code to control this pin. Can you help me confirm whether this pin is used in this routine? The chip I use is Nordic 52832

P0.21 is by default setup to be nRESET, and you should not use this pin unless you have setup your project to use P0.21 as a generic GPIO and not nRESET.

Kind regards,

Håkon
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