From be2956240b27484bf2be00f78841478473f023e5 Mon Sep 17 00:00:00 2001
From: Federico Lolli <federico.lolli@skywarder.eu>
Date: Fri, 21 Apr 2023 17:57:52 +0200
Subject: [PATCH] added initial files and updated cmake
---
cmake/boardcore.cmake | 1 +
src/shared/drivers/sdspi/sdspi.cpp | 601 +++++++++++++++++++++++++++++
src/shared/drivers/sdspi/sdspi.h | 52 +++
3 files changed, 654 insertions(+)
create mode 100644 src/shared/drivers/sdspi/sdspi.cpp
create mode 100644 src/shared/drivers/sdspi/sdspi.h
diff --git a/cmake/boardcore.cmake b/cmake/boardcore.cmake
index 9aeb3c2e5..aa1c27867 100644
--- a/cmake/boardcore.cmake
+++ b/cmake/boardcore.cmake
@@ -55,6 +55,7 @@ foreach(OPT_BOARD ${BOARDS})
${SBS_BASE}/src/shared/drivers/timer/PWM.cpp
${SBS_BASE}/src/shared/drivers/timer/TimestampTimer.cpp
${SBS_BASE}/src/shared/drivers/runcam/Runcam.cpp
+ ${SBS_BASE}/src/shared/drivers/sdspi/sdspi.cpp
${SBS_BASE}/src/shared/drivers/spi/SPITransaction.cpp
${SBS_BASE}/src/shared/drivers/usart/USART.cpp
${SBS_BASE}/src/shared/drivers/i2c/I2CDriver.cpp
diff --git a/src/shared/drivers/sdspi/sdspi.cpp b/src/shared/drivers/sdspi/sdspi.cpp
new file mode 100644
index 000000000..4b7a2fea3
--- /dev/null
+++ b/src/shared/drivers/sdspi/sdspi.cpp
@@ -0,0 +1,601 @@
+/* Copyright (c) 2023 Skyward Experimental Rocketry
+ * Authors: Federico Lolli
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <miosix.h>
+#include <cstdio>
+#include <errno.h>
+
+//Note: enabling debugging might cause deadlock when using sleep() or reboot()
+//The bug won't be fixed because debugging is only useful for driver development
+///\internal Debug macro, for normal conditions
+//#define DBG iprintf
+#define DBG(x,...) do {} while(0)
+///\internal Debug macro, for errors only
+//#define DBGERR iprintf
+#define DBGERR(x,...) do {} while(0)
+
+namespace miosix {
+
+///\internal Type of card (1<<0)=MMC (1<<1)=SDv1 (1<<2)=SDv2 (1<<2)|(1<<3)=SDHC
+static unsigned char cardType=0;
+
+/*
+ * Definitions for MMC/SDC command.
+ * A command has the following format:
+ * - 1 bit @ 0 (start bit)
+ * - 1 bit @ 1 (transmission bit)
+ * - 6 bit which identify command index (CMD0..CMD63)
+ * - 32 bit command argument
+ * - 7 bit CRC
+ * - 1 bit @ 1 (end bit)
+ * In addition, ACMDxx are the sequence of two commands, CMD55 and CMDxx
+ * These constants have the following meaninig:
+ * - bit #7 @ 1 indicates that it is an ACMD. send_cmd() will send CMD55, then
+ * clear this bit and send the command with this bit @ 0 (which is start bit)
+ * - bit #6 always @ 1, because it is the transmission bit
+ * - remaining 6 bit represent command index
+ */
+#define CMD0 (0x40+0) /* GO_IDLE_STATE */
+#define CMD1 (0x40+1) /* SEND_OP_COND (MMC) */
+#define ACMD41 (0xC0+41) /* SEND_OP_COND (SDC) */
+#define CMD8 (0x40+8) /* SEND_IF_COND */
+#define CMD9 (0x40+9) /* SEND_CSD */
+#define CMD10 (0x40+10) /* SEND_CID */
+#define CMD12 (0x40+12) /* STOP_TRANSMISSION */
+#define CMD13 (0x40+13) /* SEND_STATUS */
+#define ACMD13 (0xC0+13) /* SD_STATUS (SDC) */
+#define CMD16 (0x40+16) /* SET_BLOCKLEN */
+#define CMD17 (0x40+17) /* READ_SINGLE_BLOCK */
+#define CMD18 (0x40+18) /* READ_MULTIPLE_BLOCK */
+#define CMD23 (0x40+23) /* SET_BLOCK_COUNT (MMC) */
+#define ACMD23 (0xC0+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
+#define CMD24 (0x40+24) /* WRITE_BLOCK */
+#define CMD25 (0x40+25) /* WRITE_MULTIPLE_BLOCK */
+#define CMD42 (0x40+42) /* LOCK_UNLOCK */
+#define CMD55 (0x40+55) /* APP_CMD */
+#define CMD58 (0x40+58) /* READ_OCR */
+
+// SSPCR0 Bit-Definitions
+#define CPOL 6
+#define CPHA 7
+// SSPCR1 Bit-Defintions
+#define SSE 1
+#define MS 2
+#define SCR 8
+// SSPSR Bit-Definitions
+#define TNF 1
+#define RNE 2
+#define BSY 4
+
+#define SPI_SCK_PIN 17 // SCK P0.17 out
+#define SPI_MISO_PIN 18 // MISO P0.18 in
+#define SPI_MOSI_PIN 19 // MOSI P0.19 out
+#define SPI_SS_PIN 20 // CS p0.20 out
+
+#define SPI_SCK_FUNCBIT 2
+#define SPI_MISO_FUNCBIT 4
+#define SPI_MOSI_FUNCBIT 6
+#define SPI_SS_FUNCBIT 8
+
+///\internal Maximum speed 14745600/2=7372800
+#define SPI_PRESCALE_MIN 2
+
+///\internal Select/unselect card
+#define CS_LOW() IOCLR0 = (1<<SPI_SS_PIN)
+#define CS_HIGH() IOSET0 = (1<<SPI_SS_PIN)
+
+//Function prototypes
+static unsigned char send_cmd(unsigned char cmd, unsigned int arg);
+
+/**
+ * \internal
+ * Initialize SPI
+ */
+static void spi_1_init()
+{
+ unsigned char incoming;
+ PCONP|=(1<<10);//Enable SPI1
+ // setup GPIO
+ IODIR0 |= (1<<SPI_SCK_PIN)|(1<<SPI_MOSI_PIN)|(1<<SPI_SS_PIN);
+ IODIR0 &= ~(1<<SPI_MISO_PIN);
+ // Unselect card
+ CS_HIGH();
+ // Set GPIO mode
+ PINSEL1 &= ~( (3<<SPI_SCK_FUNCBIT) | (3<<SPI_MISO_FUNCBIT) |
+ (3<<SPI_MOSI_FUNCBIT) | (3<<SPI_SS_FUNCBIT) );
+
+ // setup Pin-Functions - keep automatic CS disabled during init
+ PINSEL1 |= ( (2<<SPI_SCK_FUNCBIT) | (2<<SPI_MISO_FUNCBIT) |
+ (2<<SPI_MOSI_FUNCBIT) );
+ // enable SPI-Master - slowest speed
+ SSPCR0 = ((8-1)<<0) | (0<<CPOL) | (0x20<<SCR);
+ SSPCR1 = (1<<SSE);
+ // low speed during init
+ SSPCPSR=254;
+
+ // Send 20 spi commands with card not selected
+ for(int i=0;i<20;i++)
+ {
+ while( !(SSPSR & (1<<TNF)) ) ; //Wait
+ SSPDR=0xff;
+ while( !(SSPSR & (1<<RNE)) ) ; //Wait
+ incoming=SSPDR;
+ (void)incoming;
+ }
+}
+
+/**
+ * \internal
+ * Send and receive one byte through SPI
+ */
+static unsigned char spi_1_send(unsigned char outgoing)
+{
+ while(!(SSPSR & (1<<TNF))) ;
+ SSPDR=outgoing;
+ while(!(SSPSR & (1<<RNE))) ;
+ return SSPDR;
+}
+
+/**
+ * \internal
+ * Used for debugging, print 8 bit error code from SD card
+ */
+static void print_error_code(unsigned char value)
+{
+ switch(value)
+ {
+ case 0x40:
+ DBGERR("Parameter error\n");
+ break;
+ case 0x20:
+ DBGERR("Address error\n");
+ break;
+ case 0x10:
+ DBGERR("Erase sequence error\n");
+ break;
+ case 0x08:
+ DBGERR("CRC error\n");
+ break;
+ case 0x04:
+ DBGERR("Illegal command\n");
+ break;
+ case 0x02:
+ DBGERR("Erase reset\n");
+ break;
+ case 0x01:
+ DBGERR("Card is initializing\n");
+ break;
+ default:
+ DBGERR("Unknown error 0x%x\n",value);
+ break;
+ }
+}
+
+/**
+ * \internal
+ * Return 1 if card is OK, otherwise print 16 bit error code from SD card
+ */
+static char sd_status()
+{
+ short value=send_cmd(CMD13,0);
+ value<<=8;
+ value|=spi_1_send(0xff);
+
+ switch(value)
+ {
+ case 0x0000:
+ return 1;
+ case 0x0001:
+ DBGERR("Card is Locked\n");
+ /*//Try to fix the problem by erasing all the SD card.
+ char e=send_cmd(CMD16,1);
+ if(e!=0) print_error_code(e);
+ e=send_cmd(CMD42,0);
+ if(e!=0) print_error_code(e);
+ spi_1_send(0xfe); // Start block
+ spi_1_send(1<<3); //Erase all disk command
+ spi_1_send(0xff); // Checksum part 1
+ spi_1_send(0xff); // Checksum part 2
+ e=spi_1_send(0xff);
+ iprintf("Reached here 0x%x\n",e);//Should return 0xe5
+ while(spi_1_send(0xff)!=0xff);*/
+ break;
+ case 0x0002:
+ DBGERR("WP erase skip or lock/unlock cmd failed\n");
+ break;
+ case 0x0004:
+ DBGERR("General error\n");
+ break;
+ case 0x0008:
+ DBGERR("Internal card controller error\n");
+ break;
+ case 0x0010:
+ DBGERR("Card ECC failed\n");
+ break;
+ case 0x0020:
+ DBGERR("Write protect violation\n");
+ break;
+ case 0x0040:
+ DBGERR("Invalid selection for erase\n");
+ break;
+ case 0x0080:
+ DBGERR("Out of range or CSD overwrite\n");
+ break;
+ default:
+ if(value>0x00FF)
+ print_error_code((unsigned char)(value>>8));
+ else
+ DBGERR("Unknown error 0x%x\n",value);
+ break;
+ }
+ return -1;
+}
+
+/**
+ * \internal
+ * Wait until card is ready
+ */
+static unsigned char wait_ready()
+{
+ unsigned char result;
+ spi_1_send(0xff);
+ for(int i=0;i<460800;i++)//Timeout ~500ms
+ {
+ result=spi_1_send(0xff);
+ if(result==0xff) return 0xff;
+ if(i%500==0) DBG("*\n");
+ }
+ DBGERR("Error: wait_ready()\n");
+ return result;
+}
+
+/**
+ * \internal
+ * Send a command to the SD card
+ * \param cmd one among the #define'd commands
+ * \param arg command's argument
+ * \return command's r1 response. If command returns a longer response, the user
+ * can continue reading the response with spi_1_send(0xff)
+ */
+static unsigned char send_cmd(unsigned char cmd, unsigned int arg)
+{
+ unsigned char n, res;
+ if(cmd & 0x80)
+ { // ACMD<n> is the command sequence of CMD55-CMD<n>
+ cmd&=0x7f;
+ res=send_cmd(CMD55,0);
+ if(res>1) return res;
+ }
+
+ // Select the card and wait for ready
+ CS_HIGH();
+ CS_LOW();
+
+ if(cmd==CMD0)
+ {
+ //wait_ready on CMD0 seems to cause infinite loop
+ spi_1_send(0xff);
+ } else {
+ if(wait_ready()!=0xff) return 0xff;
+ }
+ // Send command
+ spi_1_send(cmd); // Start + Command index
+ spi_1_send((unsigned char)(arg >> 24)); // Argument[31..24]
+ spi_1_send((unsigned char)(arg >> 16)); // Argument[23..16]
+ spi_1_send((unsigned char)(arg >> 8)); // Argument[15..8]
+ spi_1_send((unsigned char)arg); // Argument[7..0]
+ n=0x01; // Dummy CRC + Stop
+ if (cmd==CMD0) n=0x95; // Valid CRC for CMD0(0)
+ if (cmd==CMD8) n=0x87; // Valid CRC for CMD8(0x1AA)
+ spi_1_send(n);
+ // Receive response
+ if (cmd==CMD12) spi_1_send(0xff); // Skip a stuff byte when stop reading
+ n=10; // Wait response, try 10 times
+ do
+ res=spi_1_send(0xff);
+ while ((res & 0x80) && --n);
+ return res; // Return with the response value
+}
+
+/**
+ * \internal
+ * Receive a data packet from the SD card
+ * \param buf data buffer to store received data
+ * \param byte count (must be multiple of 4)
+ * \return true on success, false on failure
+ */
+static bool rx_datablock(unsigned char *buf, unsigned int btr)
+{
+ unsigned char token;
+ for(int i=0;i<0xffff;i++)
+ {
+ token=spi_1_send(0xff);
+ if(token!=0xff) break;
+ }
+ if(token!=0xfe) return false; // If not valid data token, retutn error
+
+ do { // Receive the data block into buffer
+ *buf=spi_1_send(0xff); buf++;
+ *buf=spi_1_send(0xff); buf++;
+ *buf=spi_1_send(0xff); buf++;
+ *buf=spi_1_send(0xff); buf++;
+ } while(btr-=4);
+ spi_1_send(0xff); // Discard CRC
+ spi_1_send(0xff);
+
+ return true; // Return success
+}
+
+/**
+ * \internal
+ * Send a data packet to the SD card
+ * \param buf 512 byte data block to be transmitted
+ * \param token data start/stop token
+ * \return true on success, false on failure
+ */
+static bool tx_datablock (const unsigned char *buf, unsigned char token)
+{
+ unsigned char resp;
+ if(wait_ready()!=0xff) return false;
+
+ spi_1_send(token); // Xmit data token
+ if (token!=0xfd)
+ { // Is data token
+ for(int i=0;i<256;i++)
+ { // Xmit the 512 byte data block
+ spi_1_send(*buf); buf++;
+ spi_1_send(*buf); buf++;
+ }
+ spi_1_send(0xff); // CRC (Dummy)
+ spi_1_send(0xff);
+ resp=spi_1_send(0xff); // Receive data response
+ if((resp & 0x1f)!=0x05) // If not accepted, return error
+ return false;
+ }
+ return true;
+}
+
+//
+// class SPISDDriver
+//
+
+intrusive_ref_ptr<SPISDDriver> SPISDDriver::instance()
+{
+ static FastMutex m;
+ static intrusive_ref_ptr<SPISDDriver> instance;
+ Lock<FastMutex> l(m);
+ if(!instance) instance=new SPISDDriver();
+ return instance;
+}
+
+ssize_t SPISDDriver::readBlock(void* buffer, size_t size, off_t where)
+{
+ if(where % 512 || size % 512) return -EFAULT;
+ unsigned int lba=where/512;
+ unsigned int nSectors=size/512;
+ unsigned char *buf=reinterpret_cast<unsigned char*>(buffer);
+ Lock<FastMutex> l(mutex);
+ DBG("SPISDDriver::readBlock(): nSectors=%d\n",nSectors);
+ if(!(cardType & 8)) lba*=512; // Convert to byte address if needed
+ unsigned char result;
+ if(nSectors==1)
+ { // Single block read
+ result=send_cmd(CMD17,lba); // READ_SINGLE_BLOCK
+ if(result!=0)
+ {
+ print_error_code(result);
+ CS_HIGH();
+ return -EBADF;
+ }
+ if(rx_datablock(buf,512)==false)
+ {
+ DBGERR("Block read error\n");
+ CS_HIGH();
+ return -EBADF;
+ }
+ } else { // Multiple block read
+ //DBGERR("Mbr\n");//debug only
+ result=send_cmd(CMD18,lba); // READ_MULTIPLE_BLOCK
+ if(result!=0)
+ {
+ print_error_code(result);
+ CS_HIGH();
+ return -EBADF;
+ }
+ do {
+ if(!rx_datablock(buf,512)) break;
+ buf+=512;
+ } while(--nSectors);
+ send_cmd(CMD12,0); // STOP_TRANSMISSION
+ if(nSectors!=0)
+ {
+ DBGERR("Multiple block read error\n");
+ CS_HIGH();
+ return -EBADF;
+ }
+ }
+ CS_HIGH();
+ return size;
+}
+
+ssize_t SPISDDriver::writeBlock(const void* buffer, size_t size, off_t where)
+{
+ if(where % 512 || size % 512) return -EFAULT;
+ unsigned int lba=where/512;
+ unsigned int nSectors=size/512;
+ const unsigned char *buf=reinterpret_cast<const unsigned char*>(buffer);
+ Lock<FastMutex> l(mutex);
+ DBG("SPISDDriver::writeBlock(): nSectors=%d\n",nSectors);
+ if(!(cardType & 8)) lba*=512; // Convert to byte address if needed
+ unsigned char result;
+ if(nSectors==1)
+ { // Single block write
+ result=send_cmd(CMD24,lba); // WRITE_BLOCK
+ if(result!=0)
+ {
+ print_error_code(result);
+ CS_HIGH();
+ return -EBADF;
+ }
+ if(tx_datablock(buf,0xfe)==false) // WRITE_BLOCK
+ {
+ DBGERR("Block write error\n");
+ CS_HIGH();
+ return -EBADF;
+ }
+ } else { // Multiple block write
+ //DBGERR("Mbw\n");//debug only
+ if(cardType & 6) send_cmd(ACMD23,nSectors);//Only if it is SD card
+ result=send_cmd(CMD25,lba); // WRITE_MULTIPLE_BLOCK
+ if(result!=0)
+ {
+ print_error_code(result);
+ CS_HIGH();
+ return -EBADF;
+ }
+ do {
+ if(!tx_datablock(buf,0xfc)) break;
+ buf+=512;
+ } while(--nSectors);
+ if(!tx_datablock(0,0xfd)) // STOP_TRAN token
+ {
+ DBGERR("Multiple block write error\n");
+ CS_HIGH();
+ return -EBADF;
+ }
+ }
+ CS_HIGH();
+ return size;
+}
+
+int SPISDDriver::ioctl(int cmd, void* arg)
+{
+ DBG("SPISDDriver::ioctl()\n");
+ if(cmd!=IOCTL_SYNC) return -ENOTTY;
+ Lock<FastMutex> l(mutex);
+ CS_LOW();
+ unsigned char result=wait_ready();
+ CS_HIGH();
+ if(result==0xff) return 0;
+ else return -EFAULT;
+}
+
+SPISDDriver::SPISDDriver() : Device(Device::BLOCK)
+{
+ const int MAX_RETRY=20;//Maximum command retry before failing
+ spi_1_init(); /* init at low speed */
+ unsigned char resp;
+ int i;
+ for(i=0;i<MAX_RETRY;i++)
+ {
+ resp=send_cmd(CMD0,0);
+ if(resp==1) break;
+ }
+ DBG("CMD0 required %d commands\n",i+1);
+
+ if(resp!=1)
+ {
+ print_error_code(resp);
+ DBGERR("Init failed\n");
+ CS_HIGH();
+ return; //Error
+ }
+ unsigned char n, cmd, ty=0, ocr[4];
+ // Enter Idle state
+ if(send_cmd(CMD8,0x1aa)==1)
+ { /* SDHC */
+ for(n=0;n<4;n++) ocr[n]=spi_1_send(0xff);// Get return value of R7 resp
+ if((ocr[2]==0x01)&&(ocr[3]==0xaa))
+ { // The card can work at vdd range of 2.7-3.6V
+ for(i=0;i<MAX_RETRY;i++)
+ {
+ resp=send_cmd(ACMD41, 1UL << 30);
+ if(resp==0)
+ {
+ if(send_cmd(CMD58,0)==0)
+ { // Check CCS bit in the OCR
+ for(n=0;n<4;n++) ocr[n]=spi_1_send(0xff);
+ if(ocr[0] & 0x40)
+ {
+ ty=12;
+ DBG("SDHC, block addressing supported\n");
+ } else {
+ ty=4;
+ DBG("SDHC, no block addressing\n");
+ }
+ } else DBGERR("CMD58 failed\n");
+
+ break; //Exit from for
+ } else print_error_code(resp);
+ }
+ DBG("ACMD41 required %d commands\n",i+1);
+ } else DBGERR("CMD8 failed\n");
+ } else { /* SDSC or MMC */
+ if(send_cmd(ACMD41,0)<=1)
+ {
+ ty=2;
+ cmd=ACMD41; /* SDSC */
+ DBG("SD card\n");
+ } else {
+ ty=1;
+ cmd=CMD1; /* MMC */
+ DBG("MMC card\n");
+ }
+ for(i=0;i<MAX_RETRY;i++)
+ {
+ resp=send_cmd(cmd,0);
+ if(resp==0)
+ {
+ if(send_cmd(CMD16,512)!=0)
+ {
+ ty=0;
+ DBGERR("CMD16 failed\n");
+ }
+ break; //Exit from for
+ } else print_error_code(resp);
+ }
+ DBG("CMD required %d commands\n",i+1);
+ }
+
+ if(ty==0)
+ {
+ CS_HIGH();
+ return; //Error
+ }
+ cardType=ty;
+
+ if(sd_status()<0)
+ {
+ DBGERR("Status error\n");
+ CS_HIGH();
+ return; //Error
+ }
+
+ CS_HIGH();
+ //Configure the SPI interface to use the 7.4MHz high speed mode
+ SSPCR0=((8-1)<<0) | (0<<CPOL);
+ SSPCPSR=SPI_PRESCALE_MIN;
+
+ DBG("Init done...\n");
+}
+
+} //namespace miosix
diff --git a/src/shared/drivers/sdspi/sdspi.h b/src/shared/drivers/sdspi/sdspi.h
new file mode 100644
index 000000000..86c283d4a
--- /dev/null
+++ b/src/shared/drivers/sdspi/sdspi.h
@@ -0,0 +1,52 @@
+/* Copyright (c) 2023 Skyward Experimental Rocketry
+ * Authors: Federico Lolli
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#pragma once
+
+#include "sdspi.h"
+
+#include <miosix.h>
+#include <filesystem/devfs/devfs.h>
+
+namespace Boardcore {
+
+/**
+ * Driver for interfacing to an SD card through SPI
+ */
+class SPISDDriver : public miosix::Device
+{
+public:
+ virtual ssize_t readBlock(void *buffer, size_t size, off_t where);
+
+ virtual ssize_t writeBlock(const void *buffer, size_t size, off_t where);
+
+ virtual int ioctl(int cmd, void *arg);
+private:
+ /**
+ * Constructor
+ */
+ SPISDDriver();
+
+ miosix::FastMutex mutex;
+};
+
+} //namespace Boardcore
--
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