To the outside world, the AHRS can be in one of only a few
primary states:
Not present - AHRS is absent or non-responsive via SPI
Inactive - Only link-level status messages are processed
Ready - Ready to receive the next application level message
Busy - Application level message is being processed
Internal to the AHRS, there are many more states that need to be
managed. This FSM provides the necessary decoupling between the
ISR (which is being driven by the SPI link) and the AHRS main
processing loop which must continue to run its filters independently
of the SPI messaging rate.
With this structure, SPI messages can be received at any time but
processed at only specific points within the filter chains.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1005 ebee16cc-31ac-478f-84a7-5cbb03baadba
This defines the SPI message format as well as a few
initial messages for moving data across the link.
The v0 messages are place holders for firmware download
in the bootloader.
The v1 messages are to be used by the main application.
Note: This is not the final protocol definition.
Subject to change without notice.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1004 ebee16cc-31ac-478f-84a7-5cbb03baadba
Mark the device specific DMA IRQ handlers as strongly linked
aliases for the genericly named interrupt vector symbol.
Here's how this works...
* The address of the symbol DMA1_Channel2_IRQHandler is written
into the DMA1/Channel2 interrupt vector by the linker script.
* The startup_*.S file specifies Default_Handler() as a weakly
linked alias for DMA1_Channel2_IRQHandler.
* We now override the weakly linked alias with the strongly linked
PIOS_SPI_sdcard_irq_handler().
* This results in the address of PIOS_SPI_sdcard_irq_handler() being
written to the vector table for the DMA1/Channel2 interrupt.
* The PIOS_SPI_sdcard_irq_handler() function is now called whenever
the DMA1/Channel2 interrupt fires.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1003 ebee16cc-31ac-478f-84a7-5cbb03baadba
The AHRSComms alarm will be raised whenever the OP board
is not able to communicate with the AHRS board.
The navigation software on the OP board could use this
alarm to trigger its best attempt at an emergency landing.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1002 ebee16cc-31ac-478f-84a7-5cbb03baadba
The com layer transmit functions should provide guarantees
that they will not modify the buffer that you're transmitting.
Declaring the parameter as a pointer to const keeps the underlying
implementations honest.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1001 ebee16cc-31ac-478f-84a7-5cbb03baadba
The sequence number field for the attitude solution is
likely unnecessary. Removed.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1000 ebee16cc-31ac-478f-84a7-5cbb03baadba
TransferByte API is simplified to either assert or
return the rx byte.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@999 ebee16cc-31ac-478f-84a7-5cbb03baadba
SD R1 response format is defined as any byte with the MSb
cleared. The code was testing for any byte that was not 0xFF
which can lead to misinterpreting a byte as the response.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@998 ebee16cc-31ac-478f-84a7-5cbb03baadba
- created temporary branch of OpenPilot (OpenPilot.posix) in order to test multi platform changes on hardware before committing to the main branch
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@995 ebee16cc-31ac-478f-84a7-5cbb03baadba
SPI block transfers were broken in commit r759. Block
transfers are primarily used by the SD card interface so
this also broke accesses to the SD card.
SD card accesses should be fixed now. Verified by writing
config objects in the GCS and confirming that they survived
a reboot of the OP board.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@808 ebee16cc-31ac-478f-84a7-5cbb03baadba
Moving sounds folder to shared. Some sounds will be uploaded later.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@792 ebee16cc-31ac-478f-84a7-5cbb03baadba
- Created a pluggable COM layer
- Converted COM + USART init into static initializers
rather than typedefs
- Generalized the USB HID COM API to match the USART
API.
- Changed USART and COM layers to be data driven rather
than #ifdef'ing/switching on the specifics of each port
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@760 ebee16cc-31ac-478f-84a7-5cbb03baadba
Added support for SPI slave configurations to the pios SPI layer.
Converted the board specific configuration for the PIOS SPI layer to
use const static initializers rather than #defines (see pios_board.c).
SPI interface between the OP board and the AHRS is now operational at
a basic level, capable of moving simple single byte messages between
boards. Multi-byte, CRC protected messages will be added on top of this.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@759 ebee16cc-31ac-478f-84a7-5cbb03baadba
Many of the STM32 library functions take a pointer to an
initialization structure. In nearly every case, this struct
is a read-only (ie. const) parameter.
It is advantageous (and good coding practice) to actually declare
read-only data as const so that the compiler can place the const data
in the .rodata section which resides in flash and doesn't consume any
RAM. This has the added bonus advantage that it is impossible for the
running application to corrupt the read-only data.
In order to allow passing pointers to const data into the library
functions, it is essential that the function prototypes also declare
their associated read-only parameters as const. This commit adds
the const attribute to those parameters that are actually read-only.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@758 ebee16cc-31ac-478f-84a7-5cbb03baadba
No functionality changed. Clean up only.
Changed a few of the (1 << x) constructs to use existing macro
definitions to improve code readability.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@757 ebee16cc-31ac-478f-84a7-5cbb03baadba
No functionality changed. Clean up only.
Make early init code (Reset_Handler) use the existing irq stack
rather than the hard-coded one.
Remove (now) unused references to the hard-coded stack.
Removed the link-time check for a minimal task stack in RAM since
FreeRTOS allocates user stacks from the heap which is already reserved
in the .bss section (as symbol xHeap).
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@756 ebee16cc-31ac-478f-84a7-5cbb03baadba
Split the floss-jtag.cfg file into separate versions
for OP and AHRS.
Push AHRS onto non-default ports for gdb, tcl and
telnet.
Update the AHRS gdb setup script to point at the new
gdb port.
Add (commented out) example sytax to support distinguishing
between multiple floss-jtag boards that don't have serial
numbers. Uses the usb bus address of each device as the
selector. See this patch posted to the openocd mailing list
for how to add this functionality to openocd:
http://lists.berlios.de/pipermail/openocd-development/2010-June/015785.html
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@755 ebee16cc-31ac-478f-84a7-5cbb03baadba
