SD/MMC architecture-specific definitions

Files
file	mmc-arch.h
	Header file for the SD/MMC device driver architecture-specific definitions.
file	mmc-arch.c
	Implementation of the SD/MMC device driver RE-Mote-specific definitions.

Functions
void	mmc_arch_cd_changed_callback (uint8_t dev, bool cd)
	Callback of the SD/MMC driver to call when the card-detection signal changes.
bool	mmc_arch_get_cd (uint8_t dev)
	Gets the state of the card-detection signal.
bool	mmc_arch_get_wp (uint8_t dev)
	Gets the state of the write-protection signal.
void	mmc_arch_spi_select (uint8_t dev, bool sel)
	Sets the SPI /CS signal as indicated.
void	mmc_arch_spi_set_clock_freq (uint8_t dev, uint32_t freq)
	Sets the SPI clock frequency.
void	mmc_arch_spi_xfer (uint8_t dev, const void *tx_buf, size_t tx_cnt, void *rx_buf, size_t rx_cnt)
	Performs an SPI transfer.

Detailed Description

SD/MMC device driver architecture-specific definitions.

Function Documentation

mmc_arch_cd_changed_callback()

void mmc_arch_cd_changed_callback	(	uint8_t	dev,
		bool	cd )

Callback of the SD/MMC driver to call when the card-detection signal changes.

Parameters

dev	Device
cd	Whether a card is detected

Note

Using this function is not mandatory. This only allows to detect a card replacement between two successive calls to the SD/MMC driver API.

Definition at line 312 of file mmc.c.

References DISK_STATUS_DISK, DISK_STATUS_WRITABLE, mmc_arch_get_wp(), and MMC_CONF_DEV_COUNT.

mmc_arch_get_cd()

bool mmc_arch_get_cd

(

uint8_t

dev

)

Gets the state of the card-detection signal.

Parameters

dev

Device

Returns

Whether a card is detected

Definition at line 73 of file mmc-arch.c.

References GPIO_CLR_PIN, GPIO_IS_OUTPUT, GPIO_READ_PIN, and GPIO_SET_OUTPUT.

mmc_arch_get_wp()

bool mmc_arch_get_wp

(

uint8_t

dev

)

Gets the state of the write-protection signal.

Parameters

dev

Device

Returns

Whether the card is write-protected

Definition at line 92 of file mmc-arch.c.

Referenced by mmc_arch_cd_changed_callback().

mmc_arch_spi_select()

void mmc_arch_spi_select	(	uint8_t	dev,
		bool	sel )

Sets the SPI /CS signal as indicated.

Parameters

dev	Device
sel	Whether to assert /CS

Definition at line 98 of file mmc-arch.c.

mmc_arch_spi_set_clock_freq()

void mmc_arch_spi_set_clock_freq	(	uint8_t	dev,
		uint32_t	freq )

Sets the SPI clock frequency.

Parameters

dev	Device
freq	Frequency (Hz)

Definition at line 108 of file mmc-arch.c.

References spix_set_clock_freq().

mmc_arch_spi_xfer()

void mmc_arch_spi_xfer	(	uint8_t	dev,
		const void *	tx_buf,
		size_t	tx_cnt,
		void *	rx_buf,
		size_t	rx_cnt )

Performs an SPI transfer.

Parameters

dev	Device
tx_buf	Pointer to the transmission buffer, or NULL
tx_cnt	Number of bytes to transmit, or 0
rx_buf	Pointer to the reception buffer, or NULL
rx_cnt	Number of bytes to receive, or 0

Definition at line 114 of file mmc-arch.c.