mjb/altos/src/stmf0, branch debian/1.6.8-5

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/stmf0: Switch ADC fast to ADC clock

2016-08-09T05:39:16+00:00

Using this slower clock eliminates sampling problems with the ADC and cleans up the chaoskey raw data. Signed-off-by: Keith Packard

altos/stmf0: Clean .bin files from flash-loader dirs

2016-08-02T23:55:11+00:00

The .bin files are what the DFU utility uses to flash the boot loader using USB. Signed-off-by: Keith Packard

altos/stmf0: Hook up clock output support

2016-08-02T23:55:11+00:00

This was used to try and not have two xtals on telemini, but failed because the provided clock has too much noise. Signed-off-by: Keith Packard

altos: Add STM32F0 beep and SPI byte API.

2016-07-14T22:12:58+00:00

Signed-off-by: Keith Packard

Switch from GPLv2 to GPLv2+

2016-07-12T22:41:41+00:00

Signed-off-by: Keith Packard

altos/stmf0: Remove ao_usb_free

2016-06-12T05:17:01+00:00

This can't work without a lot more effort. Signed-off-by: Keith Packard

altos/stmf0: Rework the sram allocation to save a few text bytes

2016-06-12T05:16:12+00:00

Boot loaders were going over 4096 bytes of ROM. I suspect we'll need more serious work soon. Signed-off-by: Keith Packard

stmf0: Do not send more data than requested for GET_DESCRIPTOR

2016-06-10T05:06:30+00:00

When Linux boots, it asks for only the first 8 bytes of the device descriptor; we must limit the amount of data sent back to that amount or USB will get wedged. Signed-off-by: Keith Packard