` **API Documents** :raw-html:`
` :raw-html:`` **Constructors** :raw-html:`
` | **SPI(**\ *unit_id*\ [required], *baudrate*\ [optional], *polarity*\ [optional], *phase*\ [optional], *databits*\ [optional], *firstbit*\ [optional], *miso*\ [optional], *mosi*\ [optional], *sck*\ [optional], *mode*\ [optional]\ **)** | Create a SPI object and configure it using other parameters. This allows you to then read/write data on the SPI bus. - ``unit_id``: The unit ID of the hardware SPI, assume default value if left blank - ``baudrate``: The speed of SPI - ``polarity``: one of factor determining SPI mode. (deprecated) - ``phase``: one of factor determining SPI mode. (deprecated) - ``databits``: number of data bits - ``Firstbit``: this determine whether first bit is MSB or LSB - ``miso```: miso pin. (deprecated) - ``mosi``: mosi pin. (deprecated) - ``sck``: clock pin. (deprecated) - ``mode``: either MASTER mode or SLAVE mode .. note:: All optional parameters have default values as follows: .. table:: :align: center ========= ============= Parameter Default ========= ============= Baudrate 2000000 Hz Polarity Inactive_low Phase Toggle_middle Databits 8 Firstbit MSB Miso N.A. Mosi N.A. Sck N.A. Mode MASTER ========= ============= There is currently 2 set of SPI, they are: .. table:: :align: center ==== ===== ===== ===== ===== unit MOSI MISO SCK CS ==== ===== ===== ===== ===== 0 PB_18 PB_19 PB_20 PB_21 1 PB_4 PB_5 PB_6 PB_7 ==== ===== ===== ===== ===== .. note:: both unit support master mode, but only ``unit 0`` supports slave mode. :raw-html:`` **Methods** :raw-html:`
` | **SPI.read()** | This method waits and read data received in SPI buffer, then return the data received. Works in both master and slave mode. | **SPI.write(**\ *value*\ [required]\ **)** | This method writes an integer value to SPI bus. Works in both master and slave mode. - **value**: an integer value to be sent on SPI bus