@@ -5,10 +5,10 @@ Arduino-Pico is licensed under the LGPL license as detailed in the included READ
In addition, it contains code from additional open source projects:
* The [Arduino IDE and ArduinoCore-API](https://arduino.cc) are developed and maintained by the Arduino team. The IDE is licensed under GPL.
* The [RP2040 GCC-based toolchain](https://github.com/earlephilhower/pico-quick-toolchain) is licensed under under the GPL.
* The [Pico-SDK](https://github.com/raspberrypi/pico-sdk) and [Pico-Extras](https://github.com/raspberrypi/pico-extras) are by Raspberry Pi (Trading) Ltd and licensed under the BSD 3-Clause license.
* [Arduino-Pico](https://github.com/earlephilhower/arduino-pico) core files are licenses under the LGPL.
* [LittleFS](https://github.com/ARMmbed/littlefs) library written by ARM Limited and released under the [BSD 3-clause license](https://github.com/ARMmbed/littlefs/blob/master/LICENSE.md).
* [UF2CONV.PY](https://github.com/microsoft/uf2) is by Microsoft Corporatio and licensed under the MIT license.
* Some filesystem code taken from the [ESP8266 Arduino Core](https://github.com/esp8266/Arduino) and licensed under the LGPL.
* The `Arduino IDE and ArduinoCore-API <https://arduino.cc>`_ are developed and maintained by the Arduino team. The IDE is licensed under GPL.
* The `RP2040 GCC-based toolchain <https://github.com/earlephilhower/pico-quick-toolchain>`_ is licensed under under the GPL.
* The `Pico-SDK <https://github.com/raspberrypi/pico-sdk>`_ and `Pico-Extras <https://github.com/raspberrypi/pico-extras>`_ are by Raspberry Pi (Trading) Ltd. and licensed under the BSD 3-Clause license.
* `Arduino-Pico <https://github.com/earlephilhower/arduino-pico>`_ core files are licenses under the LGPL.
* `LittleFS <https://github.com/ARMmbed/littlefs>`_ library written by ARM Limited and released under the `BSD 3-clause license <https://github.com/ARMmbed/littlefs/blob/master/LICENSE.md>`_ .
* `UF2CONV.PY <https://github.com/microsoft/uf2>`_ is by Microsoft Corporatio and licensed under the MIT license.
* Some filesystem code taken from the `ESP8266 Arduino Core <https://github.com/esp8266/Arduino>`_ and licensed under the LGPL.
The RP2040 has two hardware SPI interfaces, `spi0 (SPI)` and `spi1 (SPI1)`.
These interfaces are supported by the `SPI` library in master mode.
The RP2040 has two hardware SPI interfaces, ``spi0 (SPI)`` and ``spi1 (SPI1)``.
These interfaces are supported by the ``SPI`` library in master mode.
SPI pinouts can be set **before SPI.begin()** using the following calls:
...
...
@@ -13,16 +13,12 @@ SPI pinouts can be set **before SPI.begin()** using the following calls:
bool setSCK(pin_size_t pin);
bool setTX(pin_size_t pin);
Note that the `CS` pin can be hardware or software controlled by the sketch.
When software controlled, the `setCS()` call is ignored.
Note that the ``CS`` pin can be hardware or software controlled by the sketch.
When software controlled, the ``setCS()`` call is ignored.
The [Arduino SPI documention](https://www.arduino.cc/en/reference/SPI) gives
The Arduino `SPI documentation <https://www.arduino.cc/en/reference/SPI>`_ gives
a detailed overview of the library, except for the following RP2040-specific
changes:
* `SPI.begin(bool hwCS)` can take an options `hwCS` parameter.
By passing in `true` for `hwCS` the sketch does not need to worry about
asserting and deasserting the `CS` pin between transactions. The default
is `false` and requires the sketch to handle the CS pin itself, as is the
standard way in Arduino.
* The interrupt calls (`usingInterrupt`, `notUsingInterrupt`,
`attachInterrupt`, and `detachInterrpt`) are not implemented.
* ``SPI.begin(bool hwCS)`` can take an options ``hwCS`` parameter. By passing in ``true`` for ``hwCS`` the sketch does not need to worry about asserting and deasserting the ``CS`` pin between transactions. The default is ``false`` and requires the sketch to handle the CS pin itself, as is the standard way in Arduino.
* The interrupt calls (``usingInterrupt``, ``notUsingInterrupt``, ``attachInterrupt``, and ``detachInterrpt``) are not implemented.
