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Diffstat (limited to 'docs/source/usart.rst')
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1 files changed, 8 insertions, 73 deletions
diff --git a/docs/source/usart.rst b/docs/source/usart.rst index 19b054f..3beb3fc 100644 --- a/docs/source/usart.rst +++ b/docs/source/usart.rst @@ -10,82 +10,18 @@ Hardware/Circuit Design ----------------------- -The Maple has 3 separate USART devices: ``Serial1``, ``Serial2``, and -``Serial3``. In the most simple use case, the RX and TX pins are used -to send data at a predetermined baudrate with the line voltage level -relative to ground. - -+-----------+--------+-----+ -|Port |Function|Pin | -+===========+========+=====+ -|``Serial1``|TX |D7 | -| | | | -| |RX |D8 | -| | | | -| |CK |D6 | -+-----------+--------+-----+ -|``Serial2``|TX |D1 | -| | | | -| |RX |D0 | -| | | | -| |CK |D10 | -| | | | -| |CTS |D2 | -| | | | -| |RTS |D3 | -+-----------+--------+-----+ -|``Serial3``|TX |D29 | -| | | | -| |RX |D30 | -| | | | -| |CK |D31 | -| | | | -| |CTS |D32 | -| | | | -| |RTS |D33 | -+-----------+--------+-----+ - -.. TODO make above less ugly +The Maple has 3 separate USART devices. In the most simple use case, +the RX and TX pins are used to send data at a predetermined baudrate +with the line voltage level relative to ground. Their usage is +documented in the :ref:`Serial Ports <lang-serial>` language reference +page. Compatible Devices and Specifications ------------------------------------- -We have successfully used the Maple USART ports with an FT232R-based USB-serial converter at up to 115200 baud; higher speeds should certainly be possible. - -Function Reference ------------------- - -In the following, you may replace ``SerialN`` with ``Serial1``, -``Serial2``, or ``Serial3``. - -``SerialN.begin(baudrate)`` - - ``SerialN.begin`` is usually called in `setup()`_ to configure the - baudrate of the given serial port and to set up the header pins - appropriately. It can be called at any time to reconfigure a port - or to change the baudrate. 9600 baud is the generic speed most - widely supported by other devices and terminals. - -``SerialN.print(...)``/\ ``SerialN.println(...)`` - - Writes data into the port buffer to be transmitted as soon as - possible. Accepts strings (``char*``). If a raw integer is - passed, the corresponding ASCII character will be transmitted; to - print out a number in human readable form add a second parameter - with the base system. - - For example, to print out the decimal number '1234' use - ``SerialN.print(1234, DEC)``; to print out the binary number - '1001', use ``SerialN.print(9, BIN)``. - -``SerialN.available()``/\ ``SerialN.read()`` - - ``SerialN.read()`` will return the next unread character that has - been received over the port. ``SerialN.available()`` returns how - many such bytes are available (or zero if none are). If none are - available, ``SerialN.read()`` will block/fail, so the usual - program structure is to poll with ``SerialN.available`` and only - read if a nonzero value is returned. +We have successfully used the Maple USART ports with an FT232R-based +USB-serial converter at up to 115200 baud; higher speeds should +certainly be possible. Recommended Reading ------------------- @@ -94,6 +30,5 @@ Recommended Reading * `Arduino reference on Serial <http://arduino.cc/en/Reference/Serial>`_ * STMicro documentation for STM32F103RB microcontroller: - * `All <http://www.st.com/mcu/devicedocs-STM32F103RB-110.html>`_ * `Datasheet <http://www.st.com/stonline/products/literature/ds/13587.pdf>`_ (pdf) * `Reference Manual <http://www.st.com/stonline/products/literature/rm/13902.pdf>`_ (pdf) |