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Be specifically careful with the usb examples. There is likely some breakage to be expected, not sure I updated all the drivers to the correct types for the respective chips.
Simple USART Example -------------------- This example sets up a USART port and provides a few simple character handling functions to that a short interactive program can be demonstrated. It re-uses the clock setup from systick_blink and that means you could do times delays but that aspect isn't used. After this example we do character handling with interrupts.