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Diffstat (limited to 'source/lang/api/board-values.rst')
| -rw-r--r-- | source/lang/api/board-values.rst | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/source/lang/api/board-values.rst b/source/lang/api/board-values.rst index d6d78f6..e274163 100644 --- a/source/lang/api/board-values.rst +++ b/source/lang/api/board-values.rst @@ -84,8 +84,25 @@ Constants * ``BOARD_NR_USARTS``: Number of serial ports on the board. This number includes UARTs 4 and 5 if they are available. +.. _lang-board-values-debug: + +- Debug (JTAG, SW-Debug) related constants: ``BOARD_JTMS_SWDIO_PIN``, + ``BOARD_JTCK_SWCLK_PIN``, ``BOARD_JTDI_PIN``, ``BOARD_JTDO_PIN``, + and ``BOARD_NJTRST_PIN``. + + These constants are the pin numbers for :ref:`GPIOs <gpio>` used by + the :ref:`jtag` and Serial-Wire Debug peripherals. Except for the + Maple Mini, these pins are usually reserved for special purposes by + default (i.e., they are in :ref:`boardUsedPins + <lang-board-values-used-pins>`). However, they can be used as + ordinary GPIOs if you call the :ref:`lang-disabledebugports` + function. (Be careful with this on the Maple, as writing to + ``BOARD_NJTRST_PIN`` may cause your board to reset!). + .. _lang-board-values-pwm-pins: + .. _lang-board-values-adc-pins: + .. _lang-board-values-used-pins: Pin Arrays @@ -94,8 +111,7 @@ Pin Arrays Some :ref:`arrays <lang-array>` of pin numbers are available which you can use to find out certain important information about a given pin. -.. TODO add links to the board-specific hardware information on what -.. are in these arrays +.. TODO [0.1.0] links to board-specific hardware information - ``boardPWMPins``: Pin numbers of each pin capable of :ref:`PWM <pwm>` output, using :ref:`pwmWrite() <lang-pwmwrite>`. The total @@ -159,3 +175,5 @@ See Also - :ref:`lang-toggleled` - :ref:`lang-analogread` - :ref:`lang-pwmwrite` +- :ref:`lang-enabledebugports` +- :ref:`lang-disabledebugports` |