Fix FDCAN FIFO acknowledge register definition to make it correct for H7
MCUs. Previous definition contained hardcoded offset instead of using
MCU-specific macro.
Fix incorrect decoding of buffer element size. During decoding, value
returned was erratically set to 7 instead of setting 4th LSB. Buffer
element size was then always reported as 15 bytes.
Fix incorrect way of acknowledging FIFO processing. Old code ORed old
value of register with index of FIFO buffer just processed, which
generated invalid value for acknowledge. This caused FIFO to repeatedly
returning same content. Both fdcan_receive() and fdcan_release_fifo were
affected.
Added some descriptions for missing parameters, (hopefully) clarified
some along the way. Fixed all can related warnings in doxygen logs.
Added doxgen tags where meaningful comments had been provided. Dropped
redundant comment separators.
Add stm32h7 support for FDCAN peripheral. Source level compatibility is
provided with stm32g4. Additional features of stm32h7 such as
configurable buffers are supported. Implementation offers feature parity
with stm32g4 implementation.
Add stm32g4 support for FDCAN peripheral. Normal / FDCAN operation
supported, bitrate switching and filtering supported via API.
Timestamping and transmit event buffer support in API are TBD.
Originally tracked as: https://github.com/libopencm3/libopencm3/pull/1317
Reviewed-by: Karl Palsson <karlp@tweak.net.au>
Worked in nuances for differences between versions of STM32H7 devices, such as
handling of ODEN, explicit SCUEN bit, and different VOS mappings. This has
been validated on the STM32H7A3 and STM32H743 MCUs.
Old API required users to manually construct bit maps frm opaquely named
defines, with little help. It also was a pure OR operation, with no way
to ever clear bits.
Signed-off-by: Karl Palsson <karlp@tweak.net.au>
Use a single @defgroup for the "root" of a common heirarchy, and only
addtogroup for additions. This prevents an alphabetically "first" entry
from being used as the documentation for the entire group.
We need per device header includes to make the per target documentation
generation work properly. The dispatch headers are to dispatch to the
_target_ not directly to the final implementation, remember, the final
required headers for each may be multiple files, plus extra definitions!
Allows for abstraction for code that's dependent on knowing the source clock
for a peripheral. Implemented a few core peripherals that tend to have clock
tree differences between platforms (USART, timers, I2C, SPI).
We still need stub .c files as we're using shared common files, so .d
tracking doesn't work. It lets us setup basic introductory text anyway,
and there will be .c files eventually, so acceptable.
The random number generator on the STM32H7 is identical to the v1 RNG
already present in the library. So use that, and make sure that the RCC
knows about the peripheral.
Originally filed at: https://github.com/libopencm3/libopencm3/pull/1244
Reviewed-by: Karl Palsson <karlp@tweak.net.au>
* whitespace changes from review
Wrong since original commit in 2013.
LCD code can't actually automatically determine clock speed if it's HSE,
as we don't know here whether what HSE is, nor what it's divided by.
For more fun, that old 2014 API doesn't have any way of flagging that it
failed either. Hooray.
We were never going to be capable of supporting every single part
variant with their own files, so stop trying. We've been supporting the
linker script generator for a long time now, so move on from these old
static files.
Breaking: if you were using one of these, and don't wish to use the
linker script generator, you should simply declare a stub linker script,
and include the generic section definitions file, and provide this in
your own application.
Old:
LDSCRIPT = $(OPENCM3_DIR)/lib/stm32/l1/stm32l15xxb.ld
New (linker script generator):
DEVICE=stm32l151cb
New (manual):
* Add file mymemorymap.ld, with contents similar too:
```
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 256K
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 48K
}
/* Include the common ld script. */
INCLUDE cortex-m-generic.ld
```
LDSCRIPT=mymemorymap.ld
See ld/README for more information on using the linker script generator
