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13 Commits

Author SHA1 Message Date
Andrew Tridgell e45b137816 HAL_PX4: added run_debug_shell() implementation for PX4 2013-02-07 15:04:33 +11:00
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