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Commit Graph

10 Commits

Author SHA1 Message Date
James Cotton
0da6109871 Update the F4 copyright headers to 2012 2012-01-04 19:29:29 -06:00
stac
55d90970ed hmc5843: hide internal #defines and functions
Way too much was being exposed in the API for the
HMC5843.  This commit properly hides internal
details of the driver.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1629 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-09-15 14:21:04 +00:00
stac
0e7a801e9e hmc5843: Add support for DRDY signal from magnetometer
The DRDY signal from the magnetometer is connected to PB8
on the STM32.  This pin is now configured as an external
interrupt and is now used to signal when new data is
available from the magnetometer.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1628 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-09-15 14:21:02 +00:00
stac
4ac001553d hmc5843: convert line endings from CRLF to LF
No functional changes.

git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1627 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-09-15 14:21:00 +00:00
peabody124
450cf07a89 AHRS: Keeping magnetometer I2C address consistent with change to I2C driver.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1323 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-08-18 13:54:15 +00:00
stac
f74c6ffdd5 i2c: rewrite i2c layer
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
2010-08-08 04:15:08 +00:00
peabody124
d928676f5e More documentation updates, standardizing format to include addtogroup at the beginning of headers so files are associated with modules
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1121 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-07-16 19:53:35 +00:00
stac
29a8f05ac9 mag sensor: put some bounds on the parameters
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@1012 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-07-04 02:21:45 +00:00
gussy
73b5e29e02 Finalised and verified PIOS_HMC5843 library.
git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@624 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-05-15 12:50:05 +00:00
gussy
ff73ab5a80 More updates to cross-target compatibility.
Added PIOS_I2C into AHRS code.
Added PIOS_HMC5843 Module.




git-svn-id: svn://svn.openpilot.org/OpenPilot/trunk@617 ebee16cc-31ac-478f-84a7-5cbb03baadba
2010-05-12 08:18:49 +00:00