spi_arch.c File Reference

Implementation of SPI interface for ChibiOS arch. More...

#include "mcu_periph/spi.h"
#include "mcu_periph/gpio.h"
#include <BOARD_CONFIG>
#include <string.h>
#include "mcu_periph/ram_arch.h"

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Data Structures
struct	spi_init

Macros
#define	SPI_THREAD_STACK_SIZE   512
#define	SPI_DMA_BUF_LEN   512

Functions
static ioportid_t	spi_resolve_slave_port (uint8_t slave)
	Resolve slave port.
static uint16_t	spi_resolve_slave_pin (uint8_t slave)
	Resolve slave pin.
static uint32_t	spi_resolve_CR1 (struct spi_transaction *t)
	Resolve CR1 (or CFG1)
static uint32_t	spi_resolve_CR2 (struct spi_transaction *t)
	Resolve CR2 (or CFG2)
static void	handle_spi_thd (struct spi_periph *p)
	main thread function
static void	thd_spi (void *arg)
	Default spi thread.
static	IN_DMA_SECTION (struct spi_init spi1_init_s)
	Configure SPI peripherals.
static	THD_WORKING_AREA (wa_thd_spi1, SPI_THREAD_STACK_SIZE)
void	spi1_arch_init (void)
	Architecture dependent SPI1 initialization.
static	THD_WORKING_AREA (wa_thd_spi2, SPI_THREAD_STACK_SIZE)
void	spi2_arch_init (void)
	Architecture dependent SPI2 initialization.
bool	spi_submit (struct spi_periph *p, struct spi_transaction *t)
	Submit SPI transaction.
void	spi_slave_select (uint8_t slave)
	spi_slave_select() function
void	spi_slave_unselect (uint8_t slave)
	spi_slave_unselect() function
bool	spi_lock (struct spi_periph *p, uint8_t slave)
	spi_lock() function
bool	spi_resume (struct spi_periph *p, uint8_t slave)
	spi_resume() function
void	spi_init_slaves (void)
	spi_init_slaves() function

Detailed Description

Implementation of SPI interface for ChibiOS arch.

Only Master mode is allowed in ChibiOS.

Definition in file spi_arch.c.

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Data Structure Documentation

spi_init

struct spi_init

Definition at line 58 of file spi_arch.c.

Data Fields
char *	name
semaphore_t	sem

Macro Definition Documentation

SPI_DMA_BUF_LEN

#define SPI_DMA_BUF_LEN   512

Definition at line 54 of file spi_arch.c.

SPI_THREAD_STACK_SIZE

#define SPI_THREAD_STACK_SIZE   512

Definition at line 49 of file spi_arch.c.

Function Documentation

handle_spi_thd()

static void handle_spi_thd ( struct spi_periph *  p )

static

main thread function

Parameters

[in]

p

pointer to an i2c peripheral

Definition at line 302 of file spi_arch.c.

References foo, p, spi_init::sem, spi_resolve_CR1(), spi_resolve_CR2(), spi_resolve_slave_pin(), spi_resolve_slave_port(), SPI_TRANSACTION_QUEUE_LEN, SPIIdle, SPIRunning, SPISelect, SPISelectUnselect, SPITransSuccess, SPIUnselect, and spi_transaction::status.

Referenced by thd_spi().

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IN_DMA_SECTION()

static IN_DMA_SECTION ( struct spi_init  spi1_init_s )

static

Initial value:

= {
  .name = "spi2",
  .sem = __SEMAPHORE_DATA(spi2_init_s.sem, 0),
}

Configure SPI peripherals.

References foo.

spi_resolve_CR1()

static uint32_t spi_resolve_CR1 ( struct spi_transaction *  t )

inlinestatic

Resolve CR1 (or CFG1)

Given the transaction settings, returns the right configuration of SPIx_CR1 register.

This function is currently architecture dependent (for STM32F1xx STM32F4xx, STM32F7xx and STM32H7xx only) TODO: extend for other architectures too

Parameters

[in]

t

pointer to a spi_transaction struct

Definition at line 203 of file spi_arch.c.

References foo, SPICphaEdge2, SPICpolIdleHigh, SPIDiv128, SPIDiv16, SPIDiv2, SPIDiv256, SPIDiv32, SPIDiv4, SPIDiv64, SPIDiv8, SPIDss16bit, and SPILSBFirst.

Referenced by handle_spi_thd().

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spi_resolve_CR2()

static uint32_t spi_resolve_CR2 ( struct spi_transaction *  t )

inlinestatic

Resolve CR2 (or CFG2)

Given the transaction settings, returns the right configuration of SPIx_CR2 register.

This function is currently architecture dependent (for STM32F1xx STM32F4xx, STM32F7xx and STM32H7xx only) TODO: extend for other architectures too

Parameters

[in]

t

pointer to a spi_transaction struct

Definition at line 273 of file spi_arch.c.

References foo, SPICphaEdge2, SPICpolIdleHigh, SPIDss16bit, and SPILSBFirst.

Referenced by handle_spi_thd().

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spi_resolve_slave_pin()

static uint16_t spi_resolve_slave_pin ( uint8_t  slave )

inlinestatic

Resolve slave pin.

Given the slave number and the board config file, returns the right pin (i.e. 12)

Parameters

[in]

slave

index number of a slave

Definition at line 137 of file spi_arch.c.

References foo, SPI_SELECT_SLAVE0_PIN, SPI_SELECT_SLAVE1_PIN, SPI_SELECT_SLAVE2_PIN, SPI_SELECT_SLAVE3_PIN, SPI_SELECT_SLAVE4_PIN, and SPI_SELECT_SLAVE5_PIN.

Referenced by handle_spi_thd().

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spi_resolve_slave_port()

static ioportid_t spi_resolve_slave_port ( uint8_t  slave )

inlinestatic

Resolve slave port.

Given the slave number and the board config file, returns the right port (i.e. GPIOC)

Parameters

[in]

slave

index number of a slave

Definition at line 75 of file spi_arch.c.

References foo, SPI_SELECT_SLAVE0_PORT, SPI_SELECT_SLAVE1_PORT, SPI_SELECT_SLAVE2_PORT, SPI_SELECT_SLAVE3_PORT, SPI_SELECT_SLAVE4_PORT, and SPI_SELECT_SLAVE5_PORT.

Referenced by handle_spi_thd().

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thd_spi()

static void thd_spi ( void *  arg )

static

Default spi thread.

Parameters

arg	The SPI perpheral (struct spi_periph)

Definition at line 399 of file spi_arch.c.

References foo, handle_spi_thd(), and TRUE.

Referenced by spi1_arch_init(), and spi2_arch_init().

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THD_WORKING_AREA() [1/2]

static THD_WORKING_AREA ( wa_thd_spi1  , SPI_THREAD_STACK_SIZE    )

static

THD_WORKING_AREA() [2/2]

static THD_WORKING_AREA ( wa_thd_spi2  , SPI_THREAD_STACK_SIZE    )

static