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* test-usart-dma.cpp: Change mistaken "__io" -> "volatile"Marti Bolivar2011-07-061-1/+1
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* test-usart-dma.cpp: Update to demo working DMA interrupts.Marti Bolivar2011-06-201-11/+7
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* DMA checkpoint; dma_attach_interrupt() is broken.Marti Bolivar2011-04-111-0/+127
Simple USART receiver to SRAM buffer demo partially working. Interrupting when buffer is full fails mysteriously. GDB thinks we ended up in an STM32 reserved exception.