Resolved! STM32U5 / Nucleo : ADC1 & DMA linked list and TrustZone: failed to sample, "USEF" DMA error
Hi,[EDIT 3] there is no need to configure GPIOC pin 0,1 and 2 as secure to be used by ADC1 since all GPIO are secure by default when TZEN = 1. cf. RM0456 § 3.5.6 "activating TrustZone security". This is why you do not find an of this in generated cod...