API for SPI I/O. More...

#include <stdlib.h>
#include <stdint.h>
#include <xclib.h>
#include <xcore/assert.h>
#include <xcore/port.h>
#include <xcore/clock.h>

Macros
#define	SPI_MASTER_MINIMUM_DELAY 10

#define	SPI_IO_SETC_PAD_DELAY(n) (0x7007 \| ((n) << 3))

#define	SPI_IO_RESOURCE_SETCI(res, c) asm volatile( "setc res[%0], %1" :: "r" (res), "n" (c))

#define	SPI_IO_RESOURCE_SETC(res, r) asm volatile( "setc res[%0], %1" :: "r" (res), "r" (r))

#define	SPI_IO_SETSR(c) asm volatile("setsr %0" : : "n"(c));

#define	SPI_IO_CLRSR(c) asm volatile("clrsr %0" : : "n"(c));

#define	SPI_MODE_0 0,0

#define	SPI_MODE_1 0,1

#define	SPI_MODE_2 1,0

#define	SPI_MODE_3 1,1

#define	SPI_CALLBACK_ATTR __attribute__((fptrgroup("spi_callback")))

Typedefs
typedef void(*	slave_transaction_started_t) (void app_data, uint8_t out_buf, size_t outbuf_len, uint8_t *in_buf, size_t inbuf_len)

typedef void(*	slave_transaction_ended_t) (void app_data, uint8_t out_buf, size_t bytes_written, uint8_t *in_buf, size_t bytes_read, size_t read_bits)

Enumerations
enum	spi_master_sample_delay_t { spi_master_sample_delay_0 = 0 , spi_master_sample_delay_1 = 1 , spi_master_sample_delay_2 = 2 , spi_master_sample_delay_3 = 3 , spi_master_sample_delay_4 = 4 }

enum	spi_master_source_clock_t { spi_master_source_clock_ref = 0 , spi_master_source_clock_xcore }

Functions
void	spi_io_port_outpw (resource_t __p, uint32_t __w, uint32_t __bpw)

void	spi_master_init (spi_master_t *spi, xclock_t clock_block, port_t cs_port, port_t sclk_port, port_t mosi_port, port_t miso_port)

void	spi_master_device_init (spi_master_device_t dev, spi_master_t spi, uint32_t cs_pin, int cpol, int cpha, spi_master_source_clock_t source_clock, uint32_t clock_divisor, spi_master_sample_delay_t miso_sample_delay, uint32_t miso_pad_delay, uint32_t cs_to_clk_delay_ticks, uint32_t clk_to_cs_delay_ticks, uint32_t cs_to_cs_delay_ticks)

void	spi_master_start_transaction (spi_master_device_t *dev)

void	spi_master_transfer (spi_master_device_t dev, uint8_t data_out, uint8_t *data_in, size_t len)

void	spi_master_delay_before_next_transfer (spi_master_device_t *dev, uint32_t delay_ticks)

void	spi_master_end_transaction (spi_master_device_t *dev)

void	spi_master_deinit (spi_master_t *spi)

void	spi_slave (const spi_slave_callback_group_t *spi_cbg, port_t p_sclk, port_t p_mosi, port_t p_miso, port_t p_cs, xclock_t clk, int cpol, int cpha)

Detailed Description

API for SPI I/O.

Macro Definition Documentation

#define SPI_MASTER_MINIMUM_DELAY 10

The minimum number of clock ticks that should be specified for any SPI master delay value.