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USB ADC DMA not working in STM32L476RG

AKhot.1
Senior

I am using DMA in circular mode for ADC and transmitting data through USART. But now I wanted more speed so I thought of using USB. 

I am able to send a string using USB. But when I enable DMA in circular mode and turn on the "Continuous conversions" and " DMA Continuous Request". The USB port doesn't show up.

What could be the issue?

2 REPLIES 2
AKhot.1
Senior

AKhot1_0-1688991866067.png

This is my clock settings 

AKhot1_1-1688991923714.png

This is my DMA settings