Update: I downloaded the latest files and it works now ...
When I try to compile I get an error ... The last time I programmed in C was about 10 years ago, so forgive me if I should know this. I did try and figure it out myself, just not smart enough.
o: In function main': undefined reference to microfat2::walkDirectory(bool ()(directory_entry_t, unsigned int, void*), void*)
#include <WProgram.h>
#include <avr/pgmspace.h>
#include <microfat2.h>
#include <mmc.h>
byte sector_buffer[512];
char sprint_buffer[40];
// BEWARE - don't print strings longer than 39 characters!
// If you can't help it, adjust buffer size above.
//
void pprint(const char* s)
{
strcpy_P(sprint_buffer, (PGM_P)s);
Serial.print(sprint_buffer);
}
void error(const char* s)
{
pprint(PSTR("Error: "));
pprint(s);
pprint(PSTR(""));
for( /* ever */ ; ; )
{
digitalWrite(13, (millis() / 250) & 1);
}
}
bool showDirectory_walkerfn(directory_entry_t* directory_entry_data, unsigned index, void* user_data)
{
int* count = (int*)user_data;
Serial.print(index, DEC);
Serial.print(' ');
// Terminate the filename string.
// This is deliberately corrupting the buffer data, but that's ok.
directory_entry_data->filespec[11] = 0;
Serial.println(directory_entry_data->filespec);
// Increase 'seen file' count
*count = (*count)+1;
// don't stop
return false;
}
void showDirectory(void)
{
int count = 0;
pprint(PSTR("Directory of files on card:\n\n"));
microfat2::walkDirectory(showDirectory_walkerfn, &count);
pprint(PSTR("\n"));
Serial.print(count, DEC);
pprint(PSTR(" files found.\n\n"));
}
void setup(void)
{
Serial.begin(115200);
pprint(PSTR("uFat2 demonstration\n"));
if (mmc::initialize() != RES_OK)
{
error(PSTR("mmc init failed.\n"));
}
// Pass in the sector-sized buffer we'll be using ourselves later.
// uFat doesn't own it, it just needs to use it temporarily.
// We also pass in the address of a function that is used to read
// sectors from our device.
//
if (!microfat2::initialize(sector_buffer, &mmc::readSectors))
{
error(PSTR("uFat init failed.\n"));
}
showDirectory();
unsigned long sector;
unsigned long byteSize;
if (microfat2::locateFileStart(PSTR("DATA BIN"), sector, byteSize))
{
if (byteSize >= 512)
{
if (RES_OK == mmc::readSectors(sector_buffer, sector, 1))
{
for (int i = 0; i < 512; ++i)
{
sector_buffer = sector_buffer + 1;
* }*
* if (RES_OK == mmc::writeSectors(sector_buffer, sector, 1))
_ {_
_ pprint(PSTR("Written to data.bin OK!"));_
_ }_
_ else*_
* {*
* pprint(PSTR("Failed to write updated data."));*
* }*
* }*
* else*
* {*
* pprint(PSTR("Failed to read data.bin."));*
* }*
* }*
* else*
* {*
* error(PSTR("Found data.bin, but it's too small."));*
* }*
* }*
* else*
* {*
* pprint(PSTR("data.bin not present on card."));*
* }*
}
void loop(void)
{
* digitalWrite(13, (millis() / 1000) & 1);*
}