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STM32F4 Bad UART communication

Question asked by Trojak.Micha_ on Nov 13, 2016
Latest reply on Nov 13, 2016 by Trojak.Micha_

I created a project using CubeMX and I want to send messages via UART. I used a HAL_DAC_Start_DMA function. My problem is that when I'm sending some messages only 20 first characters are sent but after I send some another messages those wrong ones works fine. Also I noticed that only for optimalization level: Optimize for size UART transmission works.