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. More...
static uint16_t	spi_resolve_slave_pin (uint8_t slave)
	Resolve slave pin. More...
static uint16_t	spi_resolve_CR1 (struct spi_transaction *t)
	Resolve CR1. More...
static uint16_t	spi_resolve_CR2 (struct spi_transaction *t)
	Resolve CR2. More...
static void	handle_spi_thd (struct spi_periph *p)
	main thread function More...
static	SEMAPHORE_DECL (spi1_sem, 0)
	Configure SPI peripherals. More...
static void	thd_spi1 (void *arg)
static	THD_WORKING_AREA (wa_thd_spi1, SPI_THREAD_STACK_SIZE)
void	spi1_arch_init (void)
	Architecture dependent SPI1 initialization. More...
static	SEMAPHORE_DECL (spi2_sem, 0)
static void	thd_spi2 (void *arg)
static	THD_WORKING_AREA (wa_thd_spi2, SPI_THREAD_STACK_SIZE)
void	spi2_arch_init (void)
	Architecture dependent SPI2 initialization. More...
bool	spi_submit (struct spi_periph *p, struct spi_transaction *t)
	Submit SPI transaction. More...
void	spi_slave_select (uint8_t slave)
	spi_slave_select() function More...
void	spi_slave_unselect (uint8_t slave)
	spi_slave_unselect() function More...
bool	spi_lock (struct spi_periph *p, uint8_t slave)
	spi_lock() function More...
bool	spi_resume (struct spi_periph *p, uint8_t slave)
	spi_resume() function More...
void	spi_init_slaves (void)
	spi_init_slaves() function More...

Variables
static struct spi_init	spi1_init_s
static struct spi_init	spi2_init_s

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

struct spi_init

Definition at line 52 of file spi_arch.c.

Data Fields
semaphore_t *	sem

Macro Definition Documentation

#define SPI_DMA_BUF_LEN   512

Definition at line 59 of file spi_arch.c.

#define SPI_THREAD_STACK_SIZE   512

Definition at line 48 of file spi_arch.c.

Function Documentation

static void handle_spi_thd ( struct spi_periph *  p )

static

main thread function

Parameters

[in]

p

pointer to an i2c peripheral

Definition at line 247 of file spi_arch.c.

References spi_transaction::after_cb, spi_transaction::before_cb, spi_periph::init_struct, spi_transaction::input_buf, spi_transaction::input_length, spi_transaction::output_buf, spi_transaction::output_length, spi_periph::reg_addr, spi_transaction::select, spi_init::sem, spi_transaction::slave_idx, spi_resolve_CR1(), spi_resolve_CR2(), spi_resolve_slave_pin(), spi_resolve_slave_port(), SPI_TRANSACTION_QUEUE_LEN, SPIIdle, SPIRunning, SPISelect, SPISelectUnselect, SPITransSuccess, SPIUnselect, spi_transaction::status, spi_periph::status, spi_periph::suspend, spi_periph::trans, spi_periph::trans_extract_idx, and spi_periph::trans_insert_idx.

Referenced by thd_spi1(), and thd_spi2().

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static SEMAPHORE_DECL ( spi1_sem  , 0    )

static

Configure SPI peripherals.

static SEMAPHORE_DECL ( spi2_sem  , 0    )

static

static uint16_t spi_resolve_CR1 ( struct spi_transaction *  t )

inlinestatic

Resolve CR1.

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

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

Parameters

[in]

t

pointer to a spi_transaction struct

Definition at line 167 of file spi_arch.c.

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

Referenced by handle_spi_thd().

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static uint16_t spi_resolve_CR2 ( struct spi_transaction *  t )

inlinestatic

Resolve CR2.

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

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

Parameters

[in]

t

pointer to a spi_transaction struct

Definition at line 229 of file spi_arch.c.

References SPIDss16bit.

Referenced by handle_spi_thd().

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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 116 of file spi_arch.c.

References 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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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 69 of file spi_arch.c.

References 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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static void thd_spi1 ( void *  arg )

static

Definition at line 354 of file spi_arch.c.

References handle_spi_thd(), spi1, and TRUE.

Referenced by spi1_arch_init().

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static void thd_spi2 ( void *  arg )

static

Definition at line 393 of file spi_arch.c.

References handle_spi_thd(), spi2, and TRUE.

Referenced by spi2_arch_init().

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static THD_WORKING_AREA ( wa_thd_spi1  , SPI_THREAD_STACK_SIZE    )

static

static THD_WORKING_AREA ( wa_thd_spi2  , SPI_THREAD_STACK_SIZE    )

static

Variable Documentation

struct spi_init spi1_init_s

static

Initial value:

= {
  .sem = &spi1_sem,
}

Definition at line 349 of file spi_arch.c.

Referenced by spi1_arch_init().

struct spi_init spi2_init_s

static

Initial value:

= {
  .sem = &spi2_sem,
}

Definition at line 388 of file spi_arch.c.

Referenced by spi2_arch_init().