mjb/altos/src/stm/ao_arch.h, branch droid-gps

altos: Make stdio 8-bit clean by making pollchar return int

2012-12-01T00:01:07+00:00

We were stealing one value (0xff) in the return value from pollchar to indicate 'not ready yet'. Instead of doing that, use the integer value -1 and have pollchar return an int instead of a char. That necessitated cleaning a few other bits to make sure that 0xff wouldn't get promoted to -1 on accident. Signed-off-by: Keith Packard

altos: Clean up stm arch macros a bit.

2012-10-25T20:38:13+00:00

Turn a bunch of the macros into inline functions. Clean up the reboot method to use the stm_scb structure. Signed-off-by: Keith Packard

altos: Replace __critical usage with ao_arch_critical as needed

2012-10-25T07:07:14+00:00

sdcc offers __critical as a machine-independent way to block interrupts, but as gcc doesn't, we need to use a compiler-independent construct instead. ao_arch_critical has been around since the AVR port, but some old __critical usages remained. This fixes a bunch of random hangs when communicating with MM over USB or the radio as the various stdio loops were running without interrupts blocked between the test and the sleep. Signed-off-by: Keith Packard

altos: profiling on STM32L

2012-10-25T07:07:14+00:00

Add sample-based profiling, using a 1kHz timer Signed-off-by: Keith Packard

altos: Expose a signed version of the tick count

2012-08-27T20:44:35+00:00

Useful when doing time comparisons. Signed-off-by: Keith Packard

altos: Shrink STM stack size

2012-08-26T16:52:27+00:00

512 bytes should be enough for anybody. Signed-off-by: Keith Packard

altos: Place STM config values at fixed addresses for re-use

2012-07-17T08:24:52+00:00

Just like cc1111, stick the serial number and radio calibration values at known fixed addresses so that when re-flashing the board, we can go find the existing values. Signed-off-by: Keith Packard

stm: running out of memory in MM -- reduce stack to 668 bytes

2012-07-14T08:28:31+00:00

Signed-off-by: Keith Packard

altos: Increase default STM stack to 648 bytes

2012-06-28T06:09:16+00:00

512 seems cozy given the printf implementation we're using and the extensive interrupts. Signed-off-by: Keith Packard

altos: Optimize FEC encode and decode

2012-06-27T06:11:10+00:00

Integrate interleaving, CRC and padding within the decode/encode functions. Provide for ISR priorities so that the 1120 RX interrupt takes precedence over the other interrupts or we risk losing bits. Optimize the viterbi decoder a bit (goes from 10ms per packet to 7ms per packet). Signed-off-by: Keith Packard