You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
55 lines
1.3 KiB
55 lines
1.3 KiB
#pragma once
|
|
|
|
//
|
|
// SD card low-level I/O utilities
|
|
//
|
|
// Inspired by:
|
|
// http://www.avrfreaks.net/forum/tutc-simple-fat-and-sd-tutorial
|
|
//
|
|
|
|
#include <avr/io.h>
|
|
#include <avr/pgmspace.h>
|
|
#include <util/delay.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#include "iopins.h"
|
|
#include "spi.h"
|
|
#include "uart.h"
|
|
#include "stream.h"
|
|
|
|
/** Init SD card on SPI */
|
|
bool sd_init();
|
|
|
|
|
|
/**
|
|
* Send a command to the SD card
|
|
*
|
|
* @param cmd command to send
|
|
* @param arg command argument
|
|
* @return return value on success, 0xFF if nothing received back.
|
|
*/
|
|
uint8_t sd_command(const uint8_t cmd, const uint32_t arg);
|
|
|
|
|
|
/**
|
|
* Read from a sector into a buffer memory structure.
|
|
*
|
|
* @param sector sector to read (512 bytes long each)
|
|
* @param read_at offset within the sector
|
|
* @param buffer target buffer
|
|
* @param write_at target starting address
|
|
* @param len number of bytes to read
|
|
* @return true on success
|
|
*/
|
|
bool sd_read(const uint32_t sector, const uint16_t read_at, uint8_t * buffer, const uint16_t write_at, const uint16_t len);
|
|
|
|
|
|
/**
|
|
* Write bytes from a buffer into a sector.
|
|
*
|
|
* @param sector sector to write (512 bytes long each)
|
|
* @param buffer512 source buffer
|
|
* @return true on success
|
|
*/
|
|
bool sd_write(const uint32_t sector, const uint8_t * buffer512);
|
|
|