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USART and DMA

Question asked by tr.gregory8 on Aug 2, 2011
Latest reply on Aug 12, 2011 by tr.gregory8
I use DMA to write a string to USART2.
After power up I trigger transmittion by pressing down a switch and detect
( oscilloscope ) that the usart transmitted two bytes less than expected - after that every time I trigger the write sequence using DMA it works ok... until next reset or power up  !!!
Any ideas why this strange behavior ??

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