sd_mmc_spi.c File Reference

Common SPI interface for SD/MMC stack.

Copyright (c) 2014-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include <string.h>
#include "conf_board.h"
#include "conf_sd_mmc.h"
#include "sd_mmc_protocol.h"
#include "sd_mmc_spi.h"

Macros
#define	sd_mmc_spi_debug(...)

Functions
bool	sd_mmc_spi_adtc_start (sdmmc_cmd_def_t cmd, uint32_t arg, uint16_t block_size, uint16_t nb_block, bool access_block)
	Send a adtc command on the selected slot A adtc command is used for read/write access. More...
static uint8_t	sd_mmc_spi_crc7 (uint8_t *buf, uint8_t size)
	Calculates the CRC7. More...
void	sd_mmc_spi_deselect_device (uint8_t slot)
	Deselect a slot. More...
sd_mmc_spi_errno_t	sd_mmc_spi_get_errno (void)
	Return the error code of last function. More...
uint32_t	sd_mmc_spi_get_response (void)
	Return the 32 bits response of the last command. More...
void	sd_mmc_spi_init (void)
	Initializes the low level driver. More...
bool	sd_mmc_spi_read_word (uint32_t *value)
	Read a word on the line. More...
void	sd_mmc_spi_select_device (uint8_t slot, uint32_t clock, uint8_t bus_width, bool high_speed)
	Select a slot and initialize it. More...
void	sd_mmc_spi_send_clock (void)
	Send 74 clock cycles on the line of selected slot Note: It is required after card plug and before card install. More...
bool	sd_mmc_spi_send_cmd (sdmmc_cmd_def_t cmd, uint32_t arg)
	Send a command on the selected slot. More...
static bool	sd_mmc_spi_start_read_block (void)
	Sends the correct TOKEN on the line to start a read block transfer. More...
bool	sd_mmc_spi_start_read_blocks (void *dest, uint16_t nb_block)
	Start a read blocks transfer on the line Note: The driver will use the DMA available to speed up the transfer. More...
static void	sd_mmc_spi_start_write_block (void)
	Sends the correct TOKEN on the line to start a write block transfer. More...
bool	sd_mmc_spi_start_write_blocks (const void *src, uint16_t nb_block)
	Start a write blocks transfer on the line Note: The driver will use the DMA available to speed up the transfer. More...
static bool	sd_mmc_spi_stop_multiwrite_block (void)
	Executed the end of a multi blocks write transfer. More...
static void	sd_mmc_spi_stop_read_block (void)
	Executed the end of a read block transfer. More...
static bool	sd_mmc_spi_stop_write_block (void)
	Waits the TOKEN which notify the end of write block transfer. More...
static bool	sd_mmc_spi_wait_busy (void)
	Wait the end of busy on DAT0 line. More...
bool	sd_mmc_spi_wait_end_of_read_blocks (void)
	Wait the end of transfer initiated by mci_start_read_blocks() More...
bool	sd_mmc_spi_wait_end_of_write_blocks (void)
	Wait the end of transfer initiated by mci_start_write_blocks() More...
bool	sd_mmc_spi_write_word (uint32_t value)
	Write a word on the line. More...

Variables
static struct spi_module	sd_mmc_master
static uint16_t	sd_mmc_spi_block_size
	Size block requested by last mci_adtc_start() More...
static struct spi_slave_inst	sd_mmc_spi_devices [SD_MMC_SPI_MEM_CNT]
	Slot array of SPI structures. More...
static sd_mmc_spi_errno_t	sd_mmc_spi_err
	Internal global error status. More...
static uint16_t	sd_mmc_spi_nb_block
	Total number of block requested by last mci_adtc_start() More...
static uint32_t	sd_mmc_spi_response_32
	32 bits response of the last command More...
static uint32_t	sd_mmc_spi_transfert_pos
	Current position (byte) of the transfer started by mci_adtc_start() More...
static struct spi_slave_inst_config	slave_configs [SD_MMC_SPI_MEM_CNT]
uint8_t	ss_pins [SD_MMC_SPI_MEM_CNT] = {SD_MMC_CS}