SPI Peripheral Library
This library allows you control various SPI functionality including:
- Data Transfer Functions
- Transmitter Functions
- Receiver Functions
- Framed Mode Functions
- Audio Mode Functions
The Serial Peripheral Interface library (SPI-PLIB) controls the SPI communications by accessing the PIC32's SPI Special Function Registers (SFRs). These registers are accessed using the PLIB functions. You do not need to know an SFR name or the specific SFR bit-field when calling an SPI PLIB function. You just have to identify the specific function to be performed on that timer.
Example SPI Library Functions
| Mode Control |
|---|
| PLIB_SPI_Enable (SPI_ID_2); Turns on the SPI Module |
| PLIB_SPI_Disable (SPI_ID_1); Disables the SPI Module |
| PLIB_SPI_MasterEnable (SPI_ID_3); Puts an SPI module in Master Mode |
| PLIB_SPI_SlaveEnable (SPI_ID_1); Puts an SPI Module in Slave Mode. |
| PLIB_SPI_BaudRateSet(MY_SPI_INSTANCE, MY_CLOCK_FREQUENCY, 9600); Sets the SPI Baudrate |
| Reading and Writing Data |
| PLIB_SPI_BufferAddressGet(SPI_ID_1); Returns the address of the SPI module's transmit/receive buffer. |
| PLIB_SPI_BufferRead(SPI_ID_1); Returns the value in the SPI read buffer |
| PLIB_SPI_BufferWrite ( SPI_ID_3 , data ); Writes the value - data - to the SPI write buffer |
The PLIB parameter for specifying an SPI Model (SPI_ID_x) is defined by the enum SPI_NUMBER_OF_MODULES, in the header file for the PIC32 being used.
