mjb/altos/src, branch debian/1.6.8-5

altos/telegps: Inherit LDFLAGS from lpc make specification

2017-04-22T18:06:40+00:00

Somethings messed up with cortex-M0 linking, and this isn't helping as it overrides the LDFLAGS coming from the architecture. Signed-off-by: Keith Packard

altos/lpc,altos/stmf0: Use -n flag to work around link editor issue

2017-04-22T17:39:17+00:00

Something changed in the link editor which makes it complain about 'no space for program headers' on LPC and STMF0 builds. Somehow, adding the '-n' flag to the linking step fixes it. It doesn't appear to break the build, so I guess it's ok? Signed-off-by: Keith Packard

altos/arm: Align data so that gcc 5.4 doesn't do byte-accesses. Add -Wcast-align

2017-01-25T19:21:43+00:00

Gcc 5.4.1 tracks alignment of data through assignments, so that a uint32_t pointer which comes from byte-aligned uint8_t data: extern uint8_t foo[]; uint32_t *q = (void *) foo; Fetches and stores through this pointer are done bytewise. This is slow (meh), but if q references a device register, things to bad very quickly. This patch works around this bug in the compiler by adding __attribute__((aligned(4))) tags to some variables, or changing them from uint8_t to uint32_t. Places doing this will now be caught as I've added -Wcast-align to the compiler flags. That required adding (void *) casts, after the relevant code was checked to make sure the compiler could tell that the addresses were aligned. Signed-off-by: Keith Packard

altos/stm: Make ao_usb_set_address static. Saves a bunch of text space

2016-12-13T07:18:50+00:00

I'm sure this makes the function end up in-lined, which saves enough text space to fit the flash loader in ROM again. Signed-off-by: Keith Packard

altos/stm: Set SPI slave DMA priority to HIGH/VERY_HIGH

2016-09-03T06:23:51+00:00

Set spi slave DMA priority MOSI to HIGH and MISO to VERY_HIGH. Slave SPI doesn't have the luxury of slowing down when the system is busy, so provide it maximum memory bandwidth to try and keep up with the master. Signed-off-by: Keith Packard

altos/stm: Set i2c recv DMA to HIGH

2016-09-03T06:23:51+00:00

Make sure receive DMA is higher than any TX dma so that it always runs in preference. Signed-off-by: Keith Packard

altos/stm: Set MISO DMA priority to HIGH to avoid OVR

2016-09-03T06:23:31+00:00

When the MISO DMA priority is too low, and the processor gets busy, it's possible for SPI input to overrun the processor, which causes the MISO DMA to get out of sync and never finish. Set the MISO DMA priority to HIGH to avoid this. Signed-off-by: Keith Packard

altos/stm: Create funcs to set SPI DMA parameters

2016-09-03T05:58:39+00:00

Instead of having nearly duplicate versions of the SPI DMA configuration calls, create helper funcs that do most of the work so that the SPI API funcs are shorter and clearer. Signed-off-by: Keith Packard

altos/stm: Make ao_spi_duplex out pointer const

2016-09-03T05:58:39+00:00

Provides a bit better typechecking opportunities for this function. Signed-off-by: Keith Packard

altos/cc1120: remove unused status from ao_radio_fifo_write_stop

2016-08-29T16:27:53+00:00

Signed-off-by: Keith Packard