#include <stddef.h>
#include <stdint.h>
#include <pbl/device.h>
#include <pbl/drivers/gpio.h>
#include <pbl/kernel/sem.h>
#include <pbl/util/bits.h>
#include <pbl/util/size.h>

Data Structures
struct	pbl_spi_xfer
	A full-duplex transfer. More...

struct	pbl_spi_bus_ops
	Bus driver operations. More...

struct	pbl_spi_bus
	An SPI controller. More...

struct	pbl_spi_dev
	A peripheral on a bus. More...

Macros
#define	PBL_SPI_DEV(_bus, _cs, _max_hz, _mode) {.bus = (_bus), .cs = (_cs), .mode = (_mode), .max_hz = (_max_hz)}
	Initializer for a struct pbl_spi_dev.

#define	PBL_SPI_BUS_STATE_DEFINE(sym, ...)
	Define the class state of bus `sym`, for the `PBL_SPI_*_DEFINE`() macro of a driver.

#define	PBL_SPI_BUS_INIT(sym, _name, _ops, _deps)
	Initializer for the struct pbl_spi_bus of bus `sym`.

Mode flags
#define	PBL_SPI_CPHA PBL_BIT(0)
	Sample on the trailing clock edge.

#define	PBL_SPI_CPOL PBL_BIT(1)
	Clock idles high.

#define	PBL_SPI_MODE_0 0U
	Mode 0: clock idles low, sample on the leading edge.

#define	PBL_SPI_MODE_1 PBL_SPI_CPHA
	Mode 1: clock idles low, sample on the trailing edge.

#define	PBL_SPI_MODE_2 PBL_SPI_CPOL
	Mode 2: clock idles high, sample on the leading edge.

#define	PBL_SPI_MODE_3 (PBL_SPI_CPOL \| PBL_SPI_CPHA)
	Mode 3: clock idles high, sample on the trailing edge.

#define	PBL_SPI_CS_HIGH PBL_BIT(2)
	Chip select is active high.

#define	PBL_SPI_LSB_FIRST PBL_BIT(3)
	Send the least significant bit of each byte first.

Typedefs
typedef void(*	pbl_spi_callback_t) (int status, void *arg)
	Completion callback of pbl_spi_transfer_async().

Functions
int	pbl_spi_bus_init (const struct pbl_device *dev)
	Device init of every bus: sets the class state up, then calls the driver's init.

void	pbl_spi_bus_complete (const struct pbl_spi_bus *bus, int status)
	Report the outcome of the transfer in flight.

int	pbl_spi_setup (const struct pbl_spi_dev *dev)
	Set a device up: checks its chip select and mode, and drives its chip select inactive.

int	pbl_spi_transfer_async (const struct pbl_spi_dev dev, const struct pbl_spi_xfer xfers, size_t num_xfers, pbl_spi_callback_t cb, void *arg)
	Run transfers with a device, returning once they have started.

int	pbl_spi_transfer (const struct pbl_spi_dev dev, const struct pbl_spi_xfer xfers, size_t num_xfers)
	Run transfers with a device.

static int	pbl_spi_write (const struct pbl_spi_dev dev, const void buf, uint32_t len)
	Write data.

static int	pbl_spi_read (const struct pbl_spi_dev dev, void buf, uint32_t len)
	Read data, writing zeros.

static int	pbl_spi_write_read (const struct pbl_spi_dev dev, const void wbuf, uint32_t wlen, void *rbuf, uint32_t rlen)
	Write data, then read data.

Variables
const struct pbl_device_class	pbl_spi_bus_class
	Class of the SPI buses.

Data Structures

Macros

Typedefs

Functions

Variables