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authorPaul Selkirk <paul@psgd.org>2016-06-15 00:19:58 -0400
committerPaul Selkirk <paul@psgd.org>2016-06-15 00:19:58 -0400
commitc1d073875eea91c7f4e14b9aa0d7a9c12cf598c2 (patch)
tree3f55d91c99aa5f355ca917ef83656219333f1f43 /projects/hsm/cryptech_miniterm
parent3e31061ff6cbba7ea5bcb16dd0fa55b65ebf586f (diff)
Use a 1-byte DMA buffer for management UART receives.
It sounds silly, but this gives us completion callbacks, so we don't spend out entire time slice polling the receive buffer for new characters (which kills performance for tasks that are doing real work). Besides, libcli wants to process a character at a time, so uart_cli_read just waits on the completion callback.
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