mjb/altos/src/core, branch 1.2.1

altos/cc1111: Hack on USB driver to make Windows happy

2013-05-17T10:51:16+00:00

The Windows modem driver is quite chatty at startup time, getting and setting the comm parameters each time the device is opened. Sometimes, when setting the parameters, the cc1111 would STALL EP0. Most of the time, Windows would happily pass this as an error back to AltosUI which would then re-try the open (and succeed, most of the time). Sometimes, Windows would stall for 30 seconds before passing the error back. This made the whole UI freeze, and I suspect most people assumed our app had died. A bit of analysis with the beagle USB sniffer and I discovered the STALL settings, but there wasn't any correlation between the data on the wire and when the STALL would be generated. So, I found a couple of other cc1111 USB stacks on the net and just looked to see how our driver differed. There wasn't anything clearly related, but there were a list of small differences: 1) Other drivers didn't bother waiting for the hardware to ack the USBADDR setting; doing it this way means we can set the address *before* acking the setup packet. It'll get set eventually, at which point the device will start responding to packets again. Easy to fix, and saves a bit of code space too. 2) The other drivers set the STALL bit for setup packets which aren't understood. This shouldn't have any effect on 'good' systems as those shouldn't ever be generating bogus setup packets anyways. The driver already handled the STALL state in the interrupt handler, the only requirement was to figure out when to explicitly set the STALL bit. That required moving the state updating code from the start of the ep0 setup handling to the end, after the setup packet had been examined and data queued in or out as appropriate. 3) Our driver explicitly queued an IN packet for any setup request that wasn't waiting for an OUT pack. This appears to tie in with the USBADDR change above as before I made that change, this change caused the driver to fail to respond to most setup packets. This was simple once the above change was made, just move the generation of the IN packet inside the code that switched to the IN state. Signed-off-by: Keith Packard

altos: Provide a define for the number of sat infos in a telem packet

2013-05-14T05:32:25+00:00

12 fit, but it's best to use a symbolic constant Signed-off-by: Keith Packard

altos: Use flash loader on all STM products

2013-05-08T04:30:26+00:00

Includes the boot chain stuff Signed-off-by: Keith Packard

altos: Eliminate stdio looping when system has a single stdio source

2013-05-08T03:16:53+00:00

No need to loop if there's only one Signed-off-by: Keith Packard

altos: Move ao_notask to core

2013-05-08T03:16:53+00:00

The STM flash loader wants to be taskless too, share this very simple implementation of sleep/wakeup. Signed-off-by: Keith Packard

altos: Make stm-flash capable of switching to application

2013-05-08T03:15:43+00:00

This shrinks the base OS load down a bit as well so that stm-flash fits comfortably in the first 8kB of memory. Signed-off-by: Keith Packard

altos: Sanity check barometer before going to pad mode

2013-05-08T03:08:01+00:00

Make sure the barometer is reporting some sensible value before letting TM try to fly the rocket. Signed-off-by: Keith Packard

altos: Mark GPS telemetry packets with GPS time stamp

2013-05-08T03:08:01+00:00

This provides a reasonable accurate indication of the system time when the GPS location data was received, and also makes sure GPS packets get some timestamp when no other telemetry is being transmitted. Signed-off-by: Keith Packard

altos: Use separate exception stack on STM32L

2013-05-08T03:08:00+00:00

This reserves 512 bytes of memory for a stack, then makes sure that exceptions continue to use that stack while processes use the per-task stack. Signed-off-by: Keith Packard

altos: Compute "real" RSSI value in radio code as needed

2013-05-08T03:07:54+00:00

Instead of dragging around the weird CC1111 RSSI values, just compute a dBm value in a signed 8-bit integer, ao_radio_rssi. Use that everywhere we need RSSI internally. We leave the weird CC1111 value in the packet reply as that's what the host expects. Signed-off-by: Keith Packard