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The good news is that <libmaple/usb.h> and <libmaple/usb_cdcacm.h> did
turn out generic enough in what they specify to go on unchanged.
However, we can't just go on assuming that there's USB just because
we're on an F1. Now that there's value line in the tree, we need to be
more careful (value line F1s don't have USB peripherals). To that end,
make all the F1 board-includes/*.mk files specify what line their MCU
is with an MCU_F1_LINE variable. Use that to hack
libmaple/usb/rules.mk so we only try to build the USB module under
appropriate circumstances.
While we're at it, add a vector_symbols.inc for value line MCUs under
support/ld/. We need this to get the target-config.mk modifications
implied by the addition of MCU_F1_LINE. We'll fix up some other
performance-line-isms under libmaple/stm32f1 in a separate commit.
Also in libmaple/usb/:
- Move everything into a new stm32f1 directory. Due to aforementioned
rules.mk hacks, there is no immediate need for an stm32f2
directory (USB support doesn't exist there).
- Update the README for style and content.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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Add libmaple/usb/rules.mk, which compiles the USB FS device firmware
submodule. Move the logic for compiling the USB stack from
libmaple/rules.mk into libmaple/usb/rules.mk.
Move libmaple/usb/usb_cdacm.h to libmaple/include/libmaple/. Its API
is sufficiently general that we'll be able to port it over to USB
OTG (either FS or HS) eventually, and that lets us include it from
Wirish using the new style for libmaple headers.
Fix the includes for public libmaple headers within libmaple/usb.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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usb_reg_map.h contains the usual register map and register bit
definitions that libmaple convention requires. It also contains a
variety of structs and convenience functions for accessing and
manipulating endpoint registers, BTABLE entries, and PMA buffers.
We'll be moving towards usb_reg_map.h instead of usb_lib/usb_regs.h.
Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
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