In places where we were defining memory mapped peripheral buffers we
were using directly a cast to "volatile int_type *". For consistency we
should use dereferenced accessor like: &MMIO32(address)
Added --terse and --mailback options to the make stylecheck target. It
also does continue even if it enounters a possible error.
We decided on two exceptions from the linux kernel coding standard:
- Empty wait while loops may end with ; on the same line.
- All blocks after while, if, for have to be in brackets even if they
only contain one statement. Otherwise it is easy to introduce an
error.
Checkpatch needs to be adapted to reflect those changes.
Implement an API to specifiy the interrupt trigger for GPIO pins, and
control interrupts. This completes the GPIO API.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Everything needed to set up and control the GPIO pins is implemented,
EXCEPT setting up interrupts. This is the subject of a subsequent patch.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Put the Doxygen blocks in well-formatted C comments. This looks better
and is less distracting than putting them in unformatted comments.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The AHB bus allows faster control of GPIO pins versus the older APB bus.
The GPIO ports A through H default on the APB bus. Change the GPIOx
defines in gpio.h to use the base address of the AHB bus.
There's another reason to use the AHB bus: ports K tand highercan only be
accessed via the AHB bus.
***WARNING***
To work, GPIO acces to the AHB bus must be explictly enabled via the
GPIOHBCTL register. Without any additional change, this patch will break
any code using the older APB bus. If the GPIOHBCTL is not properly
modified, any acces to the GPIO register will cause a hard fault.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add functions to enable and disable USB interrupts, and document how to
use these functions to run usbd_poll() from the usb ISR.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add a complete API for controlling the UART interrupts.
Doxygen documentation with inline code examples is also provided in this patch.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add basic functionality needed to setup the UART and send/recieve data.
Interrupts, DMA, and more advanced features are not implemented in this patch.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
By somo copypaste error, the doxygen group rcc_defines was defined twice.
Don't do that. Keep Ken's doxygen structure and drop the old one.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The lm4f/nvic.h include guard was wrongfully named LIBOPENCM3_LM3S_NVIC_H.
This caused the lm3s/nvic.h include a few lines down to not be compiled.
Rename the inlcude guard to the more appropriate LIBOPENCM3_LM4F_NVIC_H.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Add an abstraction layer to handle the clock control for the run time clock on
LM4F (RCC). Sleep and deep-sleep clock configuration is not handled.
Complete documentation for the clock control API is included in doxygen-style
comments, and is included in [doc].
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Conflicts:
lib/lm4f/Makefile
The enum definitions are specified in the form
31:5 register offset from SYSCTL_BASE for the clock register
4:0 bit offset for the given peripheral
The names have the form [clock_type]_[periph_type]_[periph_number]
Where clock_type is
RCC for run clock
SCC for sleep clock
DCC for deep-sleep clock
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Create lm4f code infrastructure from the lm3s infrastructure.
As far as the interrupt table is concerned, don't create an irq.yaml. Just
include the LM3S nvic.h. The LM3S vector table seems to be compatible with the
LM4F
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
