godzil/sd2snes
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ROM launching

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This commit is contained in:
ikari
2009-11-09 23:13:27 +01:00
parent b99bd76434
commit 32fb6f3188
5 changed files with 39 additions and 9 deletions
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21
src/filetypes.c
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@@ -41,6 +41,7 @@ uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
static uint16_t crc;
static uint32_t db_tgt;
static uint32_t next_subdir_tgt;
static uint32_t parent_tgt;
static uint32_t dir_end = 0;
static uint8_t was_empty = 0;
uint32_t dir_tgt;
@@ -54,6 +55,8 @@ uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
db_tgt = SRAM_DB_ADDR+0x10;
dir_tgt = SRAM_DIR_ADDR;
next_subdir_tgt = SRAM_DIR_ADDR;
this_dir_tgt = SRAM_DIR_ADDR;
parent_tgt = 0;
dprintf("root dir @%lx\n", dir_tgt);
}
@@ -64,10 +67,11 @@ uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
dirsize = 4*(numentries);
// dir_tgt_next = dir_tgt + dirsize + 4; // number of entries + end marker
next_subdir_tgt += dirsize + 4;
if(parent_tgt) next_subdir_tgt += 4;
if(next_subdir_tgt > dir_end) {
dir_end = next_subdir_tgt;
}
dprintf("path=%s depth=%d ptr=%lx entries=%d next subdir @%lx\n", path, depth, db_tgt, numentries, next_subdir_tgt /*dir_tgt_next*/);
dprintf("path=%s depth=%d ptr=%lx entries=%d parent=%lx next subdir @%lx\n", path, depth, db_tgt, numentries, parent_tgt, next_subdir_tgt /*dir_tgt_next*/);
// _delay_ms(50);
if(mkdb) {
dprintf("d=%d Saving %lX to Address %lX [end]\n", depth, 0L, next_subdir_tgt - 4);
@@ -77,6 +81,15 @@ uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
}
res = f_opendir(&dir, (unsigned char*)path);
if (res == FR_OK) {
if(pass && parent_tgt) {
// write backlink to parent dir
sram_writelong(parent_tgt, db_tgt);
sram_writebyte(0, db_tgt+sizeof(next_subdir_tgt));
sram_writeblock("../\0", db_tgt+sizeof(next_subdir_tgt)+sizeof(len), 4);
sram_writelong(db_tgt|((uint32_t)0x80<<24), dir_tgt);
db_tgt += sizeof(next_subdir_tgt)+sizeof(len)+4;
dir_tgt += 4;
}
len = strlen((char*)path);
for (;;) {
toggle_busy_led();
@@ -112,10 +125,12 @@ uint16_t scan_dir(char* path, char mkdb, uint32_t this_dir_tgt) {
// _delay_ms(100);
sram_writelong(next_subdir_tgt, db_tgt);
sram_writebyte(len+1, db_tgt+sizeof(next_subdir_tgt));
sram_writeblock(path, db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen + 1);
sram_writeblock(path, db_tgt+sizeof(next_subdir_tgt)+sizeof(len), pathlen);
sram_writeblock("/\0", db_tgt + sizeof(next_subdir_tgt) + sizeof(len) + pathlen, 2);
// sram_writeblock((uint8_t*)&dir_tgt, db_tgt+256, sizeof(dir_tgt));
db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 1;
db_tgt += sizeof(next_subdir_tgt) + sizeof(len) + pathlen + 2;
}
parent_tgt = this_dir_tgt;
scan_dir(path, mkdb, next_subdir_tgt);
dir_tgt += 4;
// if(was_empty)dir_tgt_next += 4;

4
src/main.c
View File

@@ -163,7 +163,7 @@ int main(void) {
led_pwm();
if((get_db_id(&saved_dir_id) != FR_OK) // no database?
|| 1 || saved_dir_id != curr_dir_id) { // files changed? // XXX
|| saved_dir_id != curr_dir_id) { // files changed? // XXX
dprintf("saved dir id = %x\n", saved_dir_id);
_delay_ms(50);
dprintf("rebuilding database...");
@@ -214,7 +214,7 @@ int main(void) {
_delay_ms(100);
// snes_reset(1);
set_avr_ena(0);
dprintf("Selected name: %s\n", file_lfn);
// dprintf("Selected name: %s\n", file_lfn);
load_rom(file_lfn);
set_avr_ena(1);
snes_reset(1);

4
src/memory.h
View File

@@ -7,8 +7,8 @@
#define SRAM_WORK_ADDR (0x100000L)
#define SRAM_DB_ADDR (0x080000L)
#define SRAM_DIR_ADDR (0x300000L)
#define SRAM_CMD_ADDR (0x600004L)
#define SRAM_FD_ADDR (0x600000L)
#define SRAM_CMD_ADDR (0x601004L)
#define SRAM_FD_ADDR (0x601000L)
#define SRAM_SAVE_ADDR (0x600000L)
#define SRAM_SCRATCHPAD (0x7FFFF0L)
#define SRAM_RELIABILITY_SCORE (0x100)