12 Commits

Author	SHA1	Message	Date
Andrew Tridgell	fc8065b50f	HAL_PX4: added UART performance counters	2013-01-24 15:04:57 +11:00
Andrew Tridgell	f72b532405	HAL_PX4: ensure all writes go via buffers ... this prevents output corruption by direct fd writes	2013-01-23 09:22:51 +11:00
Andrew Tridgell	89cb3fbd61	HAL_PX4: fixed blocking IO in UART driver	2013-01-22 21:52:21 +11:00
Andrew Tridgell	6ffa18fa61	HAL_PX4: rewrite UART driver to be much more efficient ... this does the IO in the timer thread, and uses buffers in the main task to avoid system call costs in the flight code. The cost of PX4 read and write system calls is quite high - about 10 to 15 usec. We can't afford to pay that per byte	2013-01-22 21:22:01 +11:00
Andrew Tridgell	546ed19ffc	HAL_PX4: improved efficiency of serial writes ... use buffer at a time writes when possible, and use O_NONBLOCKING to avoid txspace()	2013-01-22 10:50:26 +11:00
Andrew Tridgell	18cfd29f2f	HAL_PX4: added a read buffer to the UART driver ... this lowers the average cost of reading bytes by a large amount, and prevents the GPS driver from chewing lots of time.	2013-01-22 10:34:04 +11:00
Andrew Tridgell	76092eb590	AP_HAL: remove unused peek() interface from UART drivers ... this is a bit tricky to implement on some platforms, and is unused anyway	2013-01-16 14:43:18 +11:00
Andrew Tridgell	bd9c61562f	HAL_PX4: added -d command line option to app ... allows control of serial device	2013-01-14 16:21:27 +11:00
Andrew Tridgell	d492b72a2c	HAL_PX4: use /dev/ttyS0 for uartA ... this also changes txspace and available to use FIONWRITE and FIONREAD	2013-01-03 21:12:10 +11:00
Andrew Tridgell	c6c336a6e8	HAL_PX4: implement peek() and available() ... keep a 1 byte buffer	2013-01-03 17:27:53 +11:00
Andrew Tridgell	d9d5eb52bf	HAL_PX4: use fd IO instead of stdio ... this allows for hal console output from within timers, which is very handy for debugging	2013-01-03 13:16:41 +11:00
Andrew Tridgell	9373a4e5b3	HAL_PX4: added a uartA driver ... uses stdin/stdout for IO	2013-01-03 11:03:05 +11:00