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add const to spi_device_t * parameter in SPI functions, and store ext-flash default config in ROM instead of RAM

This commit is contained in:
Atis Elsts 2018-09-24 17:51:47 +01:00
parent 9e2ffda2da
commit 8db3c8d3be
7 changed files with 91 additions and 91 deletions
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26
arch/cpu/cc2538/dev/spi-arch.c
View File

@ -107,7 +107,7 @@ static const spi_regs_t spi_regs[SSI_INSTANCE_COUNT] = {
typedef struct spi_locks_s {
mutex_t lock;
spi_device_t *owner;
const spi_device_t *owner;
} spi_locks_t;
/* One lock per SPI controller */
@ -115,40 +115,40 @@ spi_locks_t board_spi_locks_spi[SPI_CONTROLLER_COUNT] = { { MUTEX_STATUS_UNLOCKE
/*---------------------------------------------------------------------------*/
static void
spix_wait_tx_ready(spi_device_t *dev)
spix_wait_tx_ready(const spi_device_t *dev)
{
/* Infinite loop until SR_TNF - Transmit FIFO Not Full */
while(!(REG(spi_regs[dev->spi_controller].base + SSI_SR) & SSI_SR_TNF));
}
/*---------------------------------------------------------------------------*/
static int
spix_read_buf(spi_device_t *dev)
spix_read_buf(const spi_device_t *dev)
{
return REG(spi_regs[dev->spi_controller].base + SSI_DR);
}
/*---------------------------------------------------------------------------*/
static void
spix_write_buf(spi_device_t *dev, int data)
spix_write_buf(const spi_device_t *dev, int data)
{
REG(spi_regs[dev->spi_controller].base + SSI_DR) = data;
}
/*---------------------------------------------------------------------------*/
static void
spix_wait_eotx(spi_device_t *dev)
spix_wait_eotx(const spi_device_t *dev)
{
/* wait until not busy */
while(REG(spi_regs[dev->spi_controller].base + SSI_SR) & SSI_SR_BSY);
}
/*---------------------------------------------------------------------------*/
static void
spix_wait_eorx(spi_device_t *dev)
spix_wait_eorx(const spi_device_t *dev)
{
/* wait as long as receive is empty */
while(!(REG(spi_regs[dev->spi_controller].base + SSI_SR) & SSI_SR_RNE));
}
/*---------------------------------------------------------------------------*/
bool
spi_arch_has_lock(spi_device_t *dev)
spi_arch_has_lock(const spi_device_t *dev)
{
if(board_spi_locks_spi[dev->spi_controller].owner == dev) {
return true;
@ -158,7 +158,7 @@ spi_arch_has_lock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
bool
spi_arch_is_bus_locked(spi_device_t *dev)
spi_arch_is_bus_locked(const spi_device_t *dev)
{
if(board_spi_locks_spi[dev->spi_controller].lock == MUTEX_STATUS_LOCKED) {
return true;
@ -168,7 +168,7 @@ spi_arch_is_bus_locked(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_lock_and_open(spi_device_t *dev)
spi_arch_lock_and_open(const spi_device_t *dev)
{
const spi_regs_t *regs;
uint32_t scr;
@ -265,7 +265,7 @@ spi_arch_lock_and_open(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_close_and_unlock(spi_device_t *dev)
spi_arch_close_and_unlock(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
return SPI_DEV_STATUS_BUS_NOT_OWNED;
@ -282,7 +282,7 @@ spi_arch_close_and_unlock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_select(spi_device_t *dev)
spi_arch_select(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
@ -295,7 +295,7 @@ spi_arch_select(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_deselect(spi_device_t *dev)
spi_arch_deselect(const spi_device_t *dev)
{
SPIX_CS_SET(PIN_TO_PORT(dev->pin_spi_cs), PIN_TO_NUM(dev->pin_spi_cs));
@ -304,7 +304,7 @@ spi_arch_deselect(spi_device_t *dev)
/*---------------------------------------------------------------------------*/
/* Assumes that checking dev and bus is not NULL before calling this */
spi_status_t
spi_arch_transfer(spi_device_t *dev,
spi_arch_transfer(const spi_device_t *dev,
const uint8_t *write_buf, int wlen,
uint8_t *inbuf, int rlen, int ignore_len)
{

18
arch/cpu/cc26xx-cc13xx/dev/spi-arch.c
View File

@ -37,7 +37,7 @@
typedef struct spi_locks_s {
mutex_t lock;
spi_device_t *owner;
const spi_device_t *owner;
} spi_locks_t;
/* One lock per SPI controller */
@ -68,7 +68,7 @@ static const board_spi_controller_t spi_controller[SPI_CONTROLLER_COUNT] = {
};
/*---------------------------------------------------------------------------*/
bool
spi_arch_has_lock(spi_device_t *dev)
spi_arch_has_lock(const spi_device_t *dev)
{
if(board_spi_locks_spi[dev->spi_controller].owner == dev) {
return true;
@ -78,7 +78,7 @@ spi_arch_has_lock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
bool
spi_arch_is_bus_locked(spi_device_t *dev)
spi_arch_is_bus_locked(const spi_device_t *dev)
{
if(board_spi_locks_spi[dev->spi_controller].lock == MUTEX_STATUS_LOCKED) {
return true;
@ -88,7 +88,7 @@ spi_arch_is_bus_locked(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
static uint32_t
get_mode(spi_device_t *dev)
get_mode(const spi_device_t *dev)
{
/* Select the correct SPI mode */
if(dev->spi_pha == 0 && dev->spi_pol == 0) {
@ -103,7 +103,7 @@ get_mode(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_lock_and_open(spi_device_t *dev)
spi_arch_lock_and_open(const spi_device_t *dev)
{
uint32_t c;
@ -152,7 +152,7 @@ spi_arch_lock_and_open(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_close_and_unlock(spi_device_t *dev)
spi_arch_close_and_unlock(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
return SPI_DEV_STATUS_BUS_NOT_OWNED;
@ -181,7 +181,7 @@ spi_arch_close_and_unlock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_transfer(spi_device_t *dev,
spi_arch_transfer(const spi_device_t *dev,
const uint8_t *write_buf, int wlen,
uint8_t *inbuf, int rlen, int ignore_len)
{
@ -231,7 +231,7 @@ spi_arch_transfer(spi_device_t *dev,
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_select(spi_device_t *dev)
spi_arch_select(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
@ -243,7 +243,7 @@ spi_arch_select(spi_device_t *dev)
return SPI_DEV_STATUS_OK;
}
spi_status_t
spi_arch_deselect(spi_device_t *dev)
spi_arch_deselect(const spi_device_t *dev)
{
ti_lib_gpio_set_dio(dev->pin_spi_cs);

18
arch/cpu/simplelink-cc13xx-cc26xx/dev/spi-arch.c
View File

@ -54,7 +54,7 @@
/*---------------------------------------------------------------------------*/
typedef struct {
SPI_Handle handle;
spi_device_t *owner;
const spi_device_t *owner;
} spi_arch_t;
/*---------------------------------------------------------------------------*/
#if (SPI_CONTROLLER_COUNT > 0)
@ -96,7 +96,7 @@ convert_frame_format(uint8_t pol, uint8_t pha)
}
/*---------------------------------------------------------------------------*/
bool
spi_arch_has_lock(spi_device_t *dev)
spi_arch_has_lock(const spi_device_t *dev)
{
/*
* The SPI device is the owner if the SPI controller returns a valid
@ -107,7 +107,7 @@ spi_arch_has_lock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
bool
spi_arch_is_bus_locked(spi_device_t *dev)
spi_arch_is_bus_locked(const spi_device_t *dev)
{
/*
* The SPI controller is locked by any device if the SPI controller returns
@ -118,7 +118,7 @@ spi_arch_is_bus_locked(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_lock_and_open(spi_device_t *dev)
spi_arch_lock_and_open(const spi_device_t *dev)
{
uint_least8_t spi_index;
spi_arch_t *spi_arch;
@ -167,7 +167,7 @@ spi_arch_lock_and_open(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_close_and_unlock(spi_device_t *dev)
spi_arch_close_and_unlock(const spi_device_t *dev)
{
spi_arch_t *spi_arch;
@ -196,7 +196,7 @@ spi_arch_close_and_unlock(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_transfer(spi_device_t *dev,
spi_arch_transfer(const spi_device_t *dev,
const uint8_t *write_buf, int wlen,
uint8_t *inbuf, int rlen, int ignore_len)
{
@ -236,7 +236,7 @@ spi_arch_transfer(spi_device_t *dev,
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_select(spi_device_t *dev)
spi_arch_select(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
return SPI_DEV_STATUS_BUS_NOT_OWNED;
@ -248,7 +248,7 @@ spi_arch_select(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_arch_deselect(spi_device_t *dev)
spi_arch_deselect(const spi_device_t *dev)
{
if(!spi_arch_has_lock(dev)) {
return SPI_DEV_STATUS_BUS_NOT_OWNED;
@ -262,4 +262,4 @@ spi_arch_deselect(spi_device_t *dev)
/**
* @}
* @}
*/
*/

42
arch/dev/ext-flash/ext-flash.c
View File

@ -99,7 +99,7 @@
#define VERIFY_PART_POWERED_DOWN 0
#define VERIFY_PART_OK 1
/*---------------------------------------------------------------------------*/
static spi_device_t flash_spi_configuration_default = {
static const spi_device_t flash_spi_configuration_default = {
.spi_controller = EXT_FLASH_SPI_CONTROLLER,
.pin_spi_sck = EXT_FLASH_SPI_PIN_SCK,
.pin_spi_miso = EXT_FLASH_SPI_PIN_MISO,
@ -113,8 +113,8 @@ static spi_device_t flash_spi_configuration_default = {
/**
* Get spi configuration, return default configuration if NULL
*/
static spi_device_t *
get_spi_conf(spi_device_t *conf)
static const spi_device_t *
get_spi_conf(const spi_device_t *conf)
{
if(conf == NULL) {
return &flash_spi_configuration_default;
@ -126,7 +126,7 @@ get_spi_conf(spi_device_t *conf)
* Clear external flash CSN line
*/
static bool
select_on_bus(spi_device_t *flash_spi_configuration)
select_on_bus(const spi_device_t *flash_spi_configuration)
{
if(spi_select(flash_spi_configuration) == SPI_DEV_STATUS_OK) {
return true;
@ -138,7 +138,7 @@ select_on_bus(spi_device_t *flash_spi_configuration)
* Set external flash CSN line
*/
static void
deselect(spi_device_t *flash_spi_configuration)
deselect(const spi_device_t *flash_spi_configuration)
{
spi_deselect(flash_spi_configuration);
}
@ -148,7 +148,7 @@ deselect(spi_device_t *flash_spi_configuration)
* \return True when successful.
*/
static bool
wait_ready(spi_device_t *flash_spi_configuration)
wait_ready(const spi_device_t *flash_spi_configuration)
{
bool ret;
const uint8_t wbuf[1] = { BLS_CODE_READ_STATUS };
@ -196,7 +196,7 @@ wait_ready(spi_device_t *flash_spi_configuration)
* was powered down
*/
static uint8_t
verify_part(spi_device_t *flash_spi_configuration)
verify_part(const spi_device_t *flash_spi_configuration)
{
const uint8_t wbuf[] = { BLS_CODE_MDID, 0xFF, 0xFF, 0x00 };
uint8_t rbuf[2] = { 0, 0 };
@ -230,7 +230,7 @@ verify_part(spi_device_t *flash_spi_configuration)
* the status register is accessible.
*/
static bool
power_down(spi_device_t *flash_spi_configuration)
power_down(const spi_device_t *flash_spi_configuration)
{
uint8_t cmd;
uint8_t i;
@ -271,7 +271,7 @@ power_down(spi_device_t *flash_spi_configuration)
* \return True if the command was written successfully
*/
static bool
power_standby(spi_device_t *flash_spi_configuration)
power_standby(const spi_device_t *flash_spi_configuration)
{
uint8_t cmd;
bool success;
@ -297,7 +297,7 @@ power_standby(spi_device_t *flash_spi_configuration)
* \return True when successful.
*/
static bool
write_enable(spi_device_t *flash_spi_configuration)
write_enable(const spi_device_t *flash_spi_configuration)
{
bool ret;
const uint8_t wbuf[] = { BLS_CODE_WRITE_ENABLE };
@ -316,9 +316,9 @@ write_enable(spi_device_t *flash_spi_configuration)
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_open(spi_device_t *conf)
ext_flash_open(const spi_device_t *conf)
{
spi_device_t *flash_spi_configuration;
const spi_device_t *flash_spi_configuration;
flash_spi_configuration = get_spi_conf(conf);
@ -346,10 +346,10 @@ ext_flash_open(spi_device_t *conf)
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_close(spi_device_t *conf)
ext_flash_close(const spi_device_t *conf)
{
bool ret;
spi_device_t *flash_spi_configuration;
const spi_device_t *flash_spi_configuration;
flash_spi_configuration = get_spi_conf(conf);
@ -365,12 +365,12 @@ ext_flash_close(spi_device_t *conf)
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_read(spi_device_t *conf, uint32_t offset, uint32_t length, uint8_t *buf)
ext_flash_read(const spi_device_t *conf, uint32_t offset, uint32_t length, uint8_t *buf)
{
uint8_t wbuf[4];
bool ret;
spi_device_t *flash_spi_configuration;
const spi_device_t *flash_spi_configuration;
flash_spi_configuration = get_spi_conf(conf);
@ -406,12 +406,12 @@ ext_flash_read(spi_device_t *conf, uint32_t offset, uint32_t length, uint8_t *bu
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_write(spi_device_t *conf, uint32_t offset, uint32_t length, const uint8_t *buf)
ext_flash_write(const spi_device_t *conf, uint32_t offset, uint32_t length, const uint8_t *buf)
{
uint8_t wbuf[4];
uint32_t ilen; /* interim length per instruction */
spi_device_t *flash_spi_configuration;
const spi_device_t *flash_spi_configuration;
flash_spi_configuration = get_spi_conf(conf);
@ -466,7 +466,7 @@ ext_flash_write(spi_device_t *conf, uint32_t offset, uint32_t length, const uint
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_erase(spi_device_t *conf, uint32_t offset, uint32_t length)
ext_flash_erase(const spi_device_t *conf, uint32_t offset, uint32_t length)
{
/*
* Note that Block erase might be more efficient when the floor map
@ -477,7 +477,7 @@ ext_flash_erase(spi_device_t *conf, uint32_t offset, uint32_t length)
uint32_t i, numsectors;
uint32_t endoffset = offset + length - 1;
spi_device_t *flash_spi_configuration;
const spi_device_t *flash_spi_configuration;
flash_spi_configuration = get_spi_conf(conf);
@ -518,7 +518,7 @@ ext_flash_erase(spi_device_t *conf, uint32_t offset, uint32_t length)
}
/*---------------------------------------------------------------------------*/
bool
ext_flash_init(spi_device_t *conf)
ext_flash_init(const spi_device_t *conf)
{
if(ext_flash_open(conf) == false) {
return false;

12
arch/dev/ext-flash/ext-flash.h
View File

@ -61,7 +61,7 @@
* \param conf SPI bus configuration struct. NULL for default.
* \return True when successful.
*/
bool ext_flash_open(spi_device_t *conf);
bool ext_flash_open(const spi_device_t *conf);
/**
* \brief Close the storage driver
@ -70,7 +70,7 @@ bool ext_flash_open(spi_device_t *conf);
*
* This call will put the device in its lower power mode (power down).
*/
bool ext_flash_close(spi_device_t *conf);
bool ext_flash_close(const spi_device_t *conf);
/**
* \brief Read storage content
@ -82,7 +82,7 @@ bool ext_flash_close(spi_device_t *conf);
*
* buf must be allocated by the caller
*/
bool ext_flash_read(spi_device_t *conf, uint32_t offset, uint32_t length, uint8_t *buf);
bool ext_flash_read(const spi_device_t *conf, uint32_t offset, uint32_t length, uint8_t *buf);
/**
* \brief Erase storage sectors corresponding to the range.
@ -94,7 +94,7 @@ bool ext_flash_read(spi_device_t *conf, uint32_t offset, uint32_t length, uint8_
* The erase operation will be sector-wise, therefore a call to this function
* will generally start the erase procedure at an address lower than offset
*/
bool ext_flash_erase(spi_device_t *conf, uint32_t offset, uint32_t length);
bool ext_flash_erase(const spi_device_t *conf, uint32_t offset, uint32_t length);
/**
* \brief Write to storage sectors.
@ -105,7 +105,7 @@ bool ext_flash_erase(spi_device_t *conf, uint32_t offset, uint32_t length);
*
* \return True when successful.
*/
bool ext_flash_write(spi_device_t *conf, uint32_t offset, uint32_t length, const uint8_t *buf);
bool ext_flash_write(const spi_device_t *conf, uint32_t offset, uint32_t length, const uint8_t *buf);
/**
* \brief Initialise the external flash
@ -117,7 +117,7 @@ bool ext_flash_write(spi_device_t *conf, uint32_t offset, uint32_t length, const
* In order to perform any operation, the caller must first wake the device
* up by calling ext_flash_open()
*/
bool ext_flash_init(spi_device_t *conf);
bool ext_flash_init(const spi_device_t *conf);
/*---------------------------------------------------------------------------*/
#endif /* EXT_FLASH_H_ */
/*---------------------------------------------------------------------------*/

26
os/dev/spi.c
View File

@ -43,7 +43,7 @@
#include <stdbool.h>
/*---------------------------------------------------------------------------*/
spi_status_t
spi_acquire(spi_device_t *dev)
spi_acquire(const spi_device_t *dev)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -54,7 +54,7 @@ spi_acquire(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_release(spi_device_t *dev)
spi_release(const spi_device_t *dev)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -65,19 +65,19 @@ spi_release(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_select(spi_device_t *dev)
spi_select(const spi_device_t *dev)
{
return spi_arch_select(dev);
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_deselect(spi_device_t *dev)
spi_deselect(const spi_device_t *dev)
{
return spi_arch_deselect(dev);
}
/*---------------------------------------------------------------------------*/
bool
spi_has_bus(spi_device_t *dev)
spi_has_bus(const spi_device_t *dev)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return false;
@ -87,7 +87,7 @@ spi_has_bus(spi_device_t *dev)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_write_byte(spi_device_t *dev, uint8_t data)
spi_write_byte(const spi_device_t *dev, uint8_t data)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -101,7 +101,7 @@ spi_write_byte(spi_device_t *dev, uint8_t data)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_write(spi_device_t *dev, const uint8_t *data, int size)
spi_write(const spi_device_t *dev, const uint8_t *data, int size)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -115,7 +115,7 @@ spi_write(spi_device_t *dev, const uint8_t *data, int size)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_read_byte(spi_device_t *dev, uint8_t *buf)
spi_read_byte(const spi_device_t *dev, uint8_t *buf)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -129,7 +129,7 @@ spi_read_byte(spi_device_t *dev, uint8_t *buf)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_read(spi_device_t *dev, uint8_t *buf, int size)
spi_read(const spi_device_t *dev, uint8_t *buf, int size)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -143,7 +143,7 @@ spi_read(spi_device_t *dev, uint8_t *buf, int size)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_read_skip(spi_device_t *dev, int size)
spi_read_skip(const spi_device_t *dev, int size)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;
@ -157,7 +157,7 @@ spi_read_skip(spi_device_t *dev, int size)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_transfer(spi_device_t *dev,
spi_transfer(const spi_device_t *dev,
const uint8_t *wdata, int wsize,
uint8_t *rbuf, int rsize, int ignore)
{
@ -181,7 +181,7 @@ spi_transfer(spi_device_t *dev,
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_read_register(spi_device_t *dev, uint8_t reg, uint8_t *data, int size)
spi_read_register(const spi_device_t *dev, uint8_t reg, uint8_t *data, int size)
{
spi_status_t status;
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
@ -204,7 +204,7 @@ spi_read_register(spi_device_t *dev, uint8_t reg, uint8_t *data, int size)
}
/*---------------------------------------------------------------------------*/
spi_status_t
spi_strobe(spi_device_t *dev, uint8_t strobe, uint8_t *result)
spi_strobe(const spi_device_t *dev, uint8_t strobe, uint8_t *result)
{
if(dev == NULL || dev->spi_controller >= SPI_CONTROLLER_COUNT) {
return SPI_DEV_STATUS_EINVAL;

40
os/dev/spi.h
View File

@ -115,7 +115,7 @@ typedef struct spi_device {
* to be locked and the opening configuration.
* \return SPI return code
*/
spi_status_t spi_acquire(spi_device_t *dev);
spi_status_t spi_acquire(const spi_device_t *dev);
/**
* \brief Closes and then unlocks an SPI controller
@ -127,7 +127,7 @@ spi_status_t spi_acquire(spi_device_t *dev);
* This should work only if the device has already locked the SPI
* controller.
*/
spi_status_t spi_release(spi_device_t *dev);
spi_status_t spi_release(const spi_device_t *dev);
/**
* \brief Selects the SPI peripheral
@ -137,7 +137,7 @@ spi_status_t spi_release(spi_device_t *dev);
* Clears the CS pin. This should work only if the device has
* already locked the SPI controller.
*/
spi_status_t spi_select(spi_device_t *dev);
spi_status_t spi_select(const spi_device_t *dev);
/**
* \brief Deselects the SPI peripheral
@ -146,14 +146,14 @@ spi_status_t spi_select(spi_device_t *dev);
*
* Sets the CS pin. Lock is not required.
*/
spi_status_t spi_deselect(spi_device_t *dev);
spi_status_t spi_deselect(const spi_device_t *dev);
/**
* \brief Checks if a device has locked an SPI controller
* \param dev An SPI device configuration which defines the controller.
* \return true if the device has the lock, false otherwise.
*/
bool spi_has_bus(spi_device_t *dev);
bool spi_has_bus(const spi_device_t *dev);
/**
* \brief Writes a single byte to an SPI device
@ -163,7 +163,7 @@ bool spi_has_bus(spi_device_t *dev);
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_write_byte(spi_device_t *dev, uint8_t data);
spi_status_t spi_write_byte(const spi_device_t *dev, uint8_t data);
/**
* \brief Reads a single byte from an SPI device
@ -173,7 +173,7 @@ spi_status_t spi_write_byte(spi_device_t *dev, uint8_t data);
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_read_byte(spi_device_t *dev, uint8_t *data);
spi_status_t spi_read_byte(const spi_device_t *dev, uint8_t *data);
/**
* \brief Writes a buffer to an SPI device
@ -184,7 +184,7 @@ spi_status_t spi_read_byte(spi_device_t *dev, uint8_t *data);
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_write(spi_device_t *dev,
spi_status_t spi_write(const spi_device_t *dev,
const uint8_t *data, int size);
/**
@ -196,7 +196,7 @@ spi_status_t spi_write(spi_device_t *dev,
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_read(spi_device_t *dev, uint8_t *data, int size);
spi_status_t spi_read(const spi_device_t *dev, uint8_t *data, int size);
/**
* \brief Reads and ignores data from an SPI device
@ -207,7 +207,7 @@ spi_status_t spi_read(spi_device_t *dev, uint8_t *data, int size);
* Reads size bytes from the SPI and throws them away.
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_read_skip(spi_device_t *dev, int size);
spi_status_t spi_read_skip(const spi_device_t *dev, int size);
/**
* \brief Performs a generic SPI transfer
@ -226,7 +226,7 @@ spi_status_t spi_read_skip(spi_device_t *dev, int size);
* be copied to buf. The remaining ignore_len bytes won't be copied to the
* buffer. The maximum of wlen and rlen+ignore_len of bytes will be transfered.
*/
spi_status_t spi_transfer(spi_device_t *dev,
spi_status_t spi_transfer(const spi_device_t *dev,
const uint8_t *data, int wsize,
uint8_t *buf, int rsize, int ignore);
@ -239,7 +239,7 @@ spi_status_t spi_transfer(spi_device_t *dev,
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_strobe(spi_device_t *dev, uint8_t strobe,
spi_status_t spi_strobe(const spi_device_t *dev, uint8_t strobe,
uint8_t *status);
/**
@ -252,7 +252,7 @@ spi_status_t spi_strobe(spi_device_t *dev, uint8_t strobe,
*
* It should work only if the device has already locked the SPI controller.
*/
spi_status_t spi_read_register(spi_device_t *dev, uint8_t reg,
spi_status_t spi_read_register(const spi_device_t *dev, uint8_t reg,
uint8_t *data, int size);
/*---------------------------------------------------------------------------*/
@ -266,7 +266,7 @@ spi_status_t spi_read_register(spi_device_t *dev, uint8_t reg,
* \return 1 if the device has the lock, 0 otherwise.
*
*/
bool spi_arch_has_lock(spi_device_t *dev);
bool spi_arch_has_lock(const spi_device_t *dev);
/**
* \brief Checks if an SPI controller is locked by any device
@ -275,7 +275,7 @@ bool spi_arch_has_lock(spi_device_t *dev);
* \return 1 if the controller is locked, 0 otherwise.
*
*/
bool spi_arch_is_bus_locked(spi_device_t *dev);
bool spi_arch_is_bus_locked(const spi_device_t *dev);
/**
* \brief Locks and opens an SPI controller to the configuration specified.
@ -286,7 +286,7 @@ bool spi_arch_is_bus_locked(spi_device_t *dev);
* controller.
*
*/
spi_status_t spi_arch_lock_and_open(spi_device_t *dev);
spi_status_t spi_arch_lock_and_open(const spi_device_t *dev);
/**
* \brief Closes and unlocks an SPI controller
@ -299,7 +299,7 @@ spi_status_t spi_arch_lock_and_open(spi_device_t *dev);
* controller.
*
*/
spi_status_t spi_arch_close_and_unlock(spi_device_t *dev);
spi_status_t spi_arch_close_and_unlock(const spi_device_t *dev);
/**
* \brief Performs an SPI transfer
@ -318,7 +318,7 @@ spi_status_t spi_arch_close_and_unlock(spi_device_t *dev);
* be copied to buf. The remaining ignore_len bytes won't be copied to the
* buffer. The maximum of wlen and rlen+ignore_len of bytes will be transfered.
*/
spi_status_t spi_arch_transfer(spi_device_t *dev,
spi_status_t spi_arch_transfer(const spi_device_t *dev,
const uint8_t *data, int wlen,
uint8_t *buf, int rlen,
int ignore_len);
@ -331,7 +331,7 @@ spi_status_t spi_arch_transfer(spi_device_t *dev,
* Clears the CS pin. It should work only if the device has already
* locked the SPI controller.
*/
spi_status_t spi_arch_select(spi_device_t *dev);
spi_status_t spi_arch_select(const spi_device_t *dev);
/**
* \brief Deselects an SPI device
@ -340,7 +340,7 @@ spi_status_t spi_arch_select(spi_device_t *dev);
*
* Set the CS pin. Locking the SPI controller is not needed.
*/
spi_status_t spi_arch_deselect(spi_device_t *dev);
spi_status_t spi_arch_deselect(const spi_device_t *dev);
#endif /* SPI_H_ */
/*---------------------------------------------------------------------------*/