The STM32 I2C block has a number of errata associated with it.
These errata are primarily related to timing sensitivities between
the peripheral and the interrupt handler. In particular, the
correct generation of the stop bit relies on the I2C IRQ running
immediately and not being held off for any reason.
NOTE: The I2C interrupts must be the highest priority IRQs in the
system to ensure correct operation.
I2C protocol is now implemented as a formal state machine.
See: stm32_i2c_fsm.{dot,jpg} for FSM description.
I2C init is now expressed by const initializers in pios_board.c
for both OP and AHRS boards.
I2C device drivers (ie. bmp085/hmc5843) now pass in const arrays
of an unlimited number of bus transfers to be done atomically.
The I2C adapter driver now handles all bus-level locking across the
list of transactions. Generation of start/restart/stop conditions
are handled automatically over the list of transactions.
Timeouts have been removed from the API for now. May be added
back later.
This driver has run error free on both the OP and AHRS boards for
up to 48hrs but it still sometimes fails earlier than that on the OP
board. There is another possible set of improvements to the driver
that could employ the DMA engine for transfers of >= 2bytes. This
change would reduce the timing sensitivities between the peripheral
and the driver but unfortunately, both the SPI and I2C interfaces
share the DMA1 engine. That means only one of these two peripherals
can use the DMA engine and right now, SPI between OP and AHRS is
already using it.
Failures are currently fatal and will lock up the CPU. This allows
useful information to be obtained in the failure cases.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1241 ebee16cc-31ac-478f-84a7-5cbb03baadba
The AHRS comms module now sync's with the AHRS and
exchanges interesting data periodically. Whenever
the link to the AHRS is down, the AHRSComms alarm is
raised.
This is fairly basic for now but provides the last
piece of the infrastructure to move data back/forth
between the OP and the AHRS.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1014 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
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
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 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
- New Attitude module for AHRS (skeleton)
- New AttitudeSettings UAVobject
- New AttitudeActual UAVobject
- Regenerated UAVobjects
- Added new UAVobjects to OpenPilot and GCS builds
- New PiOS driver for OpenPilot AHRS (stubs only)
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@655 ebee16cc-31ac-478f-84a7-5cbb03baadba
Since the EXTI and NVIC init routines automatically enable the IRQ when it
is configured, it is possible for the EOC interrupt to fire immediately
upon configuring the IRQ.
Since the handler for the EOC interrupt (EXTI15_10_IRQHandler) does a
xSemaphoreGiveFromISR, it is important to have the semaphore initialized
prior to enabling the interrupt.
Also, added missing include for altitude module.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@654 ebee16cc-31ac-478f-84a7-5cbb03baadba
You can now send and receive packets (up to 63 bytes) just like using the USART port with PIOS_COM.
HID packet length will soon be increased to support maximum UAVTalk message length.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@182 ebee16cc-31ac-478f-84a7-5cbb03baadba
Added PIOS_USB.
Global improvements, see specific files for changes.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@144 ebee16cc-31ac-478f-84a7-5cbb03baadba
Startup procedure now waits for SD Card with the correct settings files on it.
Refactored a few global PIOS_SDCARD names.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@140 ebee16cc-31ac-478f-84a7-5cbb03baadba
Made minGlue even more robust and simpler.
Fixed a small bug with the servo output code, which is now working 100%.
Enabled USART, which can now be used for debugging.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@138 ebee16cc-31ac-478f-84a7-5cbb03baadba
Changed bootup procedure for how the SD Card is handled.
Completed, optimised and added error handling to minGlue.c
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@137 ebee16cc-31ac-478f-84a7-5cbb03baadba
This revision is a good fall-back point as a basic test that the hardware and your development environment is working.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@133 ebee16cc-31ac-478f-84a7-5cbb03baadba
SD Card fixed and working, tested with 2Gb and 8Gb (SDHC) cards.
Changed startup_stm32f10x_HD.S to work with SysTick_Handler, needs to be changed back for FreeRTOS to work.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@132 ebee16cc-31ac-478f-84a7-5cbb03baadba
One major timing caveat still exists, still deciding the best way to cross that bridge.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@63 ebee16cc-31ac-478f-84a7-5cbb03baadba
Started work on BMP085 driver. Need more information from Bosch to continue.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@61 ebee16cc-31ac-478f-84a7-5cbb03baadba
New standard to be used is PIOS_Module_Function().
Likewise with OpenPilot, OP_Module_Function() is to be used.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@59 ebee16cc-31ac-478f-84a7-5cbb03baadba
