mjb/altos/src/stmf0/ao_usb_stm.c, branch time-series

altos: Make CDC ACM 'line coding' public

2017-05-05T05:10:36+00:00

This allows other systems to see what baud rate the host has requested. Signed-off-by: Keith Packard

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

2016-12-18T05:04:33+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

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

stmf0: Clear all USB state when resetting chip. Wakeup all sleepers

2016-06-10T05:05:24+00:00

When USB is reset, but the board is not power cycled, all of the internal USB state needs to be reset, and any tasks blocked on sending or receiving packets need to be awoken so they can go wait for USB to start running again. Signed-off-by: Keith Packard

altos/stmf0: Fix build without second USB IN endpoint

2016-03-05T22:37:40+00:00

The code for the second IN endpoint was using the wrong ifdef. Signed-off-by: Keith Packard

altos/chaoskey: Add another USB endpoint to read raw data

2016-03-02T21:59:21+00:00

This replaces having the single output switch based on a pin value and allows us to box the device and still fetch raw data. For now, this will use a special libusb2 program, ao-chaosread, to pull bits as I haven't figure out how to make linux provide two /dev entries for one USB device. Signed-off-by: Keith Packard

altos/stmf0: Use device ID as usb serial number if requested

2016-02-15T23:24:35+00:00

This exposes the hardware device ID (which is unique per-chip) as the USB serial number, avoiding the need to create a custom ROM image for each device. Signed-off-by: Keith Packard