repo2/firmware_legacy/linux/mmc.c
| 183 | markw | #include <stdio.h>
|
|
#include <string.h>
|
|||
#include <sys/types.h>
|
|||
#include "mmc.h"
|
|||
#include "curses_screen.h"
|
|||
#include "linux_helper.h"
|
|||
#define LOG(x...) print_log(x)
|
|||
FILE * disk_image = NULL;
|
|||
char mmc_sector_buffer[512];
|
|||
void set_spi_clock_freq()
|
|||
{
|
|||
}
|
|||
//! Initialize AVR<->MMC hardware interface.
|
|||
/// Prepares hardware for MMC access.
|
|||
void mmcInit(void)
|
|||
{
|
|||
if (!sdcard_filename) {
|
|||
LOG("no sdcard\n");
|
|||
return;
|
|||
}
|
|||
disk_image = fopen(sdcard_filename,"r+");
|
|||
if (!disk_image) {
|
|||
LOG("cannot open %s\n", sdcard_filename);
|
|||
| 870 | markw | perror(0);
|
|
| 183 | markw | } else {
|
|
LOG("opened sdcard %s\n", sdcard_filename);
|
|||
}
|
|||
}
|
|||
void mmc_init()
|
|||
{
|
|||
mmcInit();
|
|||
}
|
|||
//! Initialize the card and prepare it for use.
|
|||
/// Returns zero if successful.
|
|||
u08 mmcReset(void){ return 0;}
|
|||
//! Read 512-byte sector from card to buffer
|
|||
/// Returns zero if successful.
|
|||
u08 mmcRead(u32 sector)
|
|||
{
|
|||
if (!disk_image) {
|
|||
goto no_data;
|
|||
}
|
|||
//fprintf(stderr,"mmcRead:%x\n",sector);
|
|||
if (fseek(disk_image, sector*512, SEEK_SET)) {
|
|||
LOG("seek to sector %d failed\n", sector);
|
|||
goto no_data;
|
|||
}
|
|||
if (fread(&mmc_sector_buffer,512,1,disk_image) != 1) {
|
|||
LOG("reading sector %d failed\n", sector);
|
|||
goto no_data;
|
|||
}
|
|||
return 0;
|
|||
no_data:
|
|||
memset(&mmc_sector_buffer, 0, 512);
|
|||
return 0;
|
|||
}
|
|||
//! Write 512-byte sector from buffer to card
|
|||
/// Returns zero if successful.
|
|||
u08 mmcWrite(u32 sector)
|
|||
{
|
|||
if (!disk_image) {
|
|||
goto no_data;
|
|||
}
|
|||
//fprintf(stderr,"mmcWrite:%x\n",sector);
|
|||
if (fseek(disk_image, sector*512, SEEK_SET)) {
|
|||
LOG("seek to sector %d failed\n", sector);
|
|||
goto no_data;
|
|||
}
|
|||
if (fwrite(&mmc_sector_buffer,512,1,disk_image) != 1) {
|
|||
LOG("reading sector %d failed\n", sector);
|
|||
goto no_data;
|
|||
}
|
|||
return 0;
|
|||
no_data:
|
|||
return 0;
|
|||
}
|