SPI Driver (Not Implemented)
Features
SPI register read/write function
Chip select signal toggle by GPIO driver
SPI Controller Functions
Initialization
-
void spi_init(uint8_t freq)
Initialize SPI module and set up pins.
- Parameters
freq (uint8_t) – frequency divider, exact meaning TBD
Transmit
-
void spi_tx(uint8_t data)
Transmit SPI
- Parameters
data (uint8_t) – 8 bit data to write
Receive
-
uint8_t spi_rx(void)
Receive SPI
- Returns
Received byte
- Return type
uint8_t
Write 8-bit Register
-
void spi_write8(uint8_t reg_addr, uint8_t value)
Write to a 8-bit register of a SPI peripheral. Note that toggle CS line have to be done before and after calling this function.
- Parameters
reg_addr (uint8_t) – 8 bit register address
value (uint8_t) – 8 bit data to be written
Read 8-bit Register
-
uint8_t spi_read8(uint8_t reg_addr)
Read from a 8-bit register of a SPI peripheral. Note that toggle CS line have to be done before and after calling this function.
- Parameters
reg_addr (uint8_t) – 8 bit register address
- Returns
data read from the register
- Return type
uint8_t