void FAT::write(const char * data)
{
//Always write to the end of the file.
fat_seek_file(_file_handle, 0, FAT_SEEK_END);
fat_write_file(_file_handle, (uint8_t *)data, strlen(data));
sd_raw_sync();
}
uint8_t goToFileEnd(struct fat_file_struct* fd){
long offset = (fd->dir_entry).file_size;
if (!fat_seek_file(fd, &offset, FAT_SEEK_SET)){
fat_close_file(fd);
// printf_P(PSTR("failed to seek file\r\n"));
return 0;
}
return 1;
}
bool SDCardFile::seek(int32_t *offset, uint8_t whence) {
if (fd == NULL)
return -1;
if (fat_seek_file(fd, offset, whence))
return true;
else
return false;
}
// reads a file from the SD card one line at a time
int fat_read_line(struct fat_file_struct* fd, uint8_t* buffer, uint8_t buffer_len)
{
char internal[INI_MAX_LINE];
int bytesRead, bytesToCopy;
int32_t offset;
char* pchar;
bytesRead = fat_read_file(fd, internal, INI_MAX_LINE);
#if INI_DEBUG
printf("read_line start: bytesRead=%d\r\n", bytesRead);
#endif
if(bytesRead > 0) { // 0 on EOF, bytes read for >0
pchar = strchr(internal, '\n'); // return a pointer to the first newline
if(pchar) { // if newline found, compute byte number for matching char
bytesToCopy = pchar - internal + 1;
}
else { // if newline not found, copy all the bytes read
bytesToCopy = bytesRead;
}
if(bytesToCopy > buffer_len) {
// warn user or exit?
bytesToCopy = buffer_len;
}
// copy the bytes to the destination buffer
strncpy0(buffer, internal, bytesToCopy);
// seek backwards from current file pointer to end of copied text
offset = bytesToCopy - bytesRead;
//offset = bytesToCopy;
#if INI_DEBUG
printf( "offset=%d, bytesRead=%d, bytesToCopy=%d\r\n",
(int)offset, bytesRead, bytesToCopy);
#endif
if(!fat_seek_file(fd, &offset, FAT_SEEK_CUR)) {
//if(!fat_seek_file(fd, &offset, FAT_SEEK_SET)) {
#if INI_DEBUG
printf("fat_seek_file: failure\r\n");
#endif
}
#if INI_DEBUG
printf("after seek: offset=%d\r\n", offset);
#endif
return bytesToCopy;
}
return bytesRead;
}
int main()
{
/* we will just use ordinary idle mode */
set_sleep_mode(SLEEP_MODE_IDLE);
/* setup uart */
uart_init();
while(1)
{
/* setup sd card slot */
if(!sd_raw_init())
{
#if DEBUG
uart_puts_p(PSTR("MMC/SD initialization failed\n"));
#endif
continue;
}
/* open first partition */
struct partition_struct* partition = partition_open(sd_raw_read,
sd_raw_read_interval,
#if SD_RAW_WRITE_SUPPORT
sd_raw_write,
sd_raw_write_interval,
#else
0,
0,
#endif
0
);
if(!partition)
{
/* If the partition did not open, assume the storage device
* is a "superfloppy", i.e. has no MBR.
*/
partition = partition_open(sd_raw_read,
sd_raw_read_interval,
#if SD_RAW_WRITE_SUPPORT
sd_raw_write,
sd_raw_write_interval,
#else
0,
0,
#endif
-1
);
if(!partition)
{
#if DEBUG
uart_puts_p(PSTR("opening partition failed\n"));
#endif
continue;
}
}
/* open file system */
struct fat_fs_struct* fs = fat_open(partition);
if(!fs)
{
#if DEBUG
uart_puts_p(PSTR("opening filesystem failed\n"));
#endif
continue;
}
/* open root directory */
struct fat_dir_entry_struct directory;
fat_get_dir_entry_of_path(fs, "/", &directory);
struct fat_dir_struct* dd = fat_open_dir(fs, &directory);
if(!dd)
{
#if DEBUG
uart_puts_p(PSTR("opening root directory failed\n"));
#endif
continue;
}
/* print some card information as a boot message */
print_disk_info(fs);
/* provide a simple shell */
char buffer[24];
while(1)
{
/* print prompt */
uart_putc('>');
uart_putc(' ');
/* read command */
char* command = buffer;
if(read_line(command, sizeof(buffer)) < 1)
continue;
/* execute command */
if(strcmp_P(command, PSTR("init")) == 0)
{
break;
}
else if(strncmp_P(command, PSTR("cd "), 3) == 0)
{
command += 3;
if(command[0] == '\0')
continue;
/* change directory */
struct fat_dir_entry_struct subdir_entry;
if(find_file_in_dir(fs, dd, command, &subdir_entry))
{
struct fat_dir_struct* dd_new = fat_open_dir(fs, &subdir_entry);
if(dd_new)
{
fat_close_dir(dd);
dd = dd_new;
continue;
}
}
uart_puts_p(PSTR("directory not found: "));
uart_puts(command);
uart_putc('\n');
}
else if(strcmp_P(command, PSTR("ls")) == 0)
{
/* print directory listing */
struct fat_dir_entry_struct dir_entry;
while(fat_read_dir(dd, &dir_entry))
{
uint8_t spaces = sizeof(dir_entry.long_name) - strlen(dir_entry.long_name) + 4;
uart_puts(dir_entry.long_name);
uart_putc(dir_entry.attributes & FAT_ATTRIB_DIR ? '/' : ' ');
while(spaces--)
uart_putc(' ');
uart_putdw_dec(dir_entry.file_size);
uart_putc('\n');
}
}
else if(strncmp_P(command, PSTR("cat "), 4) == 0)
{
command += 4;
if(command[0] == '\0')
continue;
/* search file in current directory and open it */
struct fat_file_struct* fd = open_file_in_dir(fs, dd, command);
if(!fd)
{
uart_puts_p(PSTR("error opening "));
uart_puts(command);
uart_putc('\n');
continue;
}
/* print file contents */
uint8_t buffer[8];
uint32_t offset = 0;
while(fat_read_file(fd, buffer, sizeof(buffer)) > 0)
{
uart_putdw_hex(offset);
uart_putc(':');
for(uint8_t i = 0; i < 8; ++i)
{
uart_putc(' ');
uart_putc_hex(buffer[i]);
}
uart_putc('\n');
offset += 8;
}
fat_close_file(fd);
}
else if(strcmp_P(command, PSTR("disk")) == 0)
{
if(!print_disk_info(fs))
uart_puts_p(PSTR("error reading disk info\n"));
}
#if FAT_WRITE_SUPPORT
else if(strncmp_P(command, PSTR("rm "), 3) == 0)
{
command += 3;
if(command[0] == '\0')
continue;
struct fat_dir_entry_struct file_entry;
if(find_file_in_dir(fs, dd, command, &file_entry))
{
if(fat_delete_file(fs, &file_entry))
continue;
}
uart_puts_p(PSTR("error deleting file: "));
uart_puts(command);
uart_putc('\n');
}
else if(strncmp_P(command, PSTR("touch "), 6) == 0)
{
command += 6;
if(command[0] == '\0')
continue;
struct fat_dir_entry_struct file_entry;
if(!fat_create_file(dd, command, &file_entry))
{
uart_puts_p(PSTR("error creating file: "));
uart_puts(command);
uart_putc('\n');
}
}
else if(strncmp_P(command, PSTR("write "), 6) == 0)
{
command += 6;
if(command[0] == '\0')
continue;
char* offset_value = command;
while(*offset_value != ' ' && *offset_value != '\0')
++offset_value;
if(*offset_value == ' ')
*offset_value++ = '\0';
else
continue;
/* search file in current directory and open it */
struct fat_file_struct* fd = open_file_in_dir(fs, dd, command);
if(!fd)
{
uart_puts_p(PSTR("error opening "));
uart_puts(command);
uart_putc('\n');
continue;
}
int32_t offset = strtolong(offset_value);
if(!fat_seek_file(fd, &offset, FAT_SEEK_SET))
{
uart_puts_p(PSTR("error seeking on "));
uart_puts(command);
uart_putc('\n');
fat_close_file(fd);
continue;
}
/* read text from the shell and write it to the file */
uint8_t data_len;
while(1)
{
/* give a different prompt */
uart_putc('<');
uart_putc(' ');
/* read one line of text */
data_len = read_line(buffer, sizeof(buffer));
if(!data_len)
break;
/* write text to file */
if(fat_write_file(fd, (uint8_t*) buffer, data_len) != data_len)
{
uart_puts_p(PSTR("error writing to file\n"));
break;
}
}
fat_close_file(fd);
}
else if(strncmp_P(command, PSTR("mkdir "), 6) == 0)
{
command += 6;
if(command[0] == '\0')
continue;
struct fat_dir_entry_struct dir_entry;
if(!fat_create_dir(dd, command, &dir_entry))
{
uart_puts_p(PSTR("error creating directory: "));
uart_puts(command);
uart_putc('\n');
}
}
#endif
#if SD_RAW_WRITE_BUFFERING
else if(strcmp_P(command, PSTR("sync")) == 0)
{
if(!sd_raw_sync())
uart_puts_p(PSTR("error syncing disk\n"));
}
#endif
else if(strcmp_P(command, PSTR("sync")) == 0)
{
// vytvor adresar mereni_teploty
// nekonecna smycka - pomoci RTCka kazdou minutu odmer teplotu
}
else
{
uart_puts_p(PSTR("unknown command: "));
uart_puts(command);
uart_putc('\n');
}
}
/* close directory */
fat_close_dir(dd);
/* close file system */
fat_close(fs);
/* close partition */
partition_close(partition);
}
return 0;
}
bool File::seekToOffset(int32_t offset)
{
return fat_seek_file(_fd, &offset, FAT_SEEK_SET);
}
bool File::seekToEnd(int32_t offset)
{
return fat_seek_file(_fd, &offset, FAT_SEEK_END);
}
void readRewind(uint8_t bytes) {
int32_t offset = -((int32_t)bytes);
fat_seek_file(file, &offset, FAT_SEEK_CUR);
}
uint8_t RepRapSDCard::seek_file(File f, int32_t *offset, uint8_t whence)
{
return fat_seek_file(f, offset, whence);
}
uint8_t RepRapSDCard::reset_file(File f)
{
return fat_seek_file(f, 0, FAT_SEEK_SET);
}
