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| author | Marti Bolivar <mbolivar@leaflabs.com> | 2011-03-30 00:55:51 -0400 |
|---|---|---|
| committer | Marti Bolivar <mbolivar@leaflabs.com> | 2011-03-30 07:19:13 -0400 |
| commit | b13926073f47012d6654b0236f195c4356831fc2 (patch) | |
| tree | 6b7e2a0f98ad0dd469855012cd9a10add8c8def4 /docs/source/i2c.rst | |
| parent | efbc87c64d89bbb367b6d8face6c50edf0eb5e5c (diff) | |
| download | librambutan-b13926073f47012d6654b0236f195c4356831fc2.tar.gz librambutan-b13926073f47012d6654b0236f195c4356831fc2.zip | |
Board-specific values; corresponding QA test generalizations.
Various board-specific #defines and arrays of pins added.
For the changelog (some of this information predates this commit):
* wirish/boards.h now declares the following arrays of pin numbers:
* boardPWMPins - PWM-capable pins
* boardADCPins - ADC-capable pins
* boardUsedPins - pins already in use, e.g. BOARD_BUTTON_PIN
It also declares a bool boardUsesPin(uint8 pin) function for
convenient testing of whether a pin is in use.
* wirish/boards/*.h now define:
* BOARD_USART1_TX_PIN
* BOARD_USART1_RX_PIN
* BOARD_USART2_TX_PIN
* BOARD_USART2_RX_PIN
* BOARD_USART3_TX_PIN
* BOARD_USART3_RX_PIN
* BOARD_NR_GPIO_PINS (renamed from NR_GPIO_PINS)
* BOARD_NR_USARTS (renamed from NR_USARTS)
* BOARD_NR_PWM_PINS
* BOARD_NR_ADC_PINS
* BOARD_NR_USED_PINS
* wirish/boards/maple_native.h now defines:
* BOARD_UART4_TX_PIN
* BOARD_UART4_RX_PIN
* BOARD_UART5_TX_PIN
* BOARD_UART5_RX_PIN
(Unfortunately, wirish/boards/maple_RET6.h cannot, since at least
one of the UART4/UART5 pins are used already; this will require layout
changes for a wide-release Maple form factor RET6 board).
* wirish/boards/*.cpp all include the corresponding array definitions.
They all live in flash by default, thanks to the new __FLASH__ macro
in wirish/wirish_types.h, which is a synonym for the existing __attr_flash
#define in libmaple/libmaple_types.h.
The documentation was updated to include this information. It also
gained various FIXME/TODO comments related to its generalization
across boards.
The quality assurance-related examples (examples/qa-slave-shield.cpp
and examples/test-session.cpp) now make heavy use of board-specific
values to ensure portability.
Diffstat (limited to 'docs/source/i2c.rst')
| -rw-r--r-- | docs/source/i2c.rst | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/docs/source/i2c.rst b/docs/source/i2c.rst index b4a996b..e2a7a04 100644 --- a/docs/source/i2c.rst +++ b/docs/source/i2c.rst @@ -4,11 +4,16 @@ |i2c| ===== +.. FIXME update this documentation once you write the Wire library on +.. top of libmaple i2c. + +.. FIXME generalize Maple-specific documentation + .. note:: - The |i2c| interface is currently only available from the 'i2c' branch - of the github `libmaple <http://github.com/leaflabs/libmaple>`_ - repository. + The |i2c| interface is currently only available from the 'refactor' + branch of the github `libmaple + <http://github.com/leaflabs/libmaple>`_ repository. |i2c| is a crude and easy-to-hack serial protocol that requires only two wires/channels for communication between many devices. Every @@ -56,10 +61,8 @@ Function Reference ------------------ The function API for |i2c| is not finished! See the `source code -<http://github.com/leaflabs/libmaple/blob/i2c/libmaple/i2c.h>`_ for -now. - -.. TODO link to libmaple I2C docs once (1) finished, (2) in master +<https://github.com/leaflabs/libmaple/blob/refactor/libmaple/i2c.h>`_ +for now. SMBus ----- @@ -68,8 +71,6 @@ The STM32 microcontroller has hardware support for SMBus; we simply have not written software for it. The SMBAL line for i2c1 is on header D4 and for i2c2 is on D31. -.. TODO link to libmaple SMBus docs once (1) finished, (2) in master - .. _i2c-recommended-reading: Recommended Reading |