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Add sd card support + savegames

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This commit is contained in:
Vincent Mistler
2023-02-13 17:38:14 +01:00
parent 447ba93878
commit c8ee224092
42 changed files with 28650 additions and 4 deletions
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src/main.c
+80 -4
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@@ -59,6 +59,7 @@
#include "minigb_apu.h"
#include "peanut_gb.h"
#include "mk_ili9225.h"
#include "sdcard.h"
#include "i2s.h"
#include "gbcolors.h"
@@ -276,9 +277,10 @@ void main_core1(void)
channel_config_set_ring(&c2, false, 0);
/* Enable IRQ for wake on interrupt functionality. */
irq_set_exclusive_handler(DMA_IRQ_0, core1_irq_dma_lcd_end_transfer);
dma_channel_set_irq0_enabled(dma_lcd, true);
irq_set_enabled(DMA_IRQ_0, true);
/* Use DMA_IRQ_1, DMA_IRQ_0 is already used by the SD Card reader */
irq_set_exclusive_handler(DMA_IRQ_1, core1_irq_dma_lcd_end_transfer);
dma_channel_set_irq1_enabled(dma_lcd, true);
irq_set_enabled(DMA_IRQ_1, true);
/* Clear LCD screen. */
mk_ili9225_write_pixels_start();
@@ -368,6 +370,71 @@ void lcd_draw_line(struct gb_s *gb, const uint8_t pixels[LCD_WIDTH],
}
#endif
void read_cart_ram_file(struct gb_s *gb) {
/* Load Save File. */
char filename[16];
uint_fast32_t save_size;
UINT bw;
save_size=gb_get_save_size(gb);
if(save_size>0) {
sd_card_t *pSD=sd_get_by_num(0);
FRESULT fr=f_mount(&pSD->fatfs,pSD->pcName,1);
if (FR_OK!=fr) {
printf("f_mount error: %s (%d)\n",FRESULT_str(fr),fr);
return;
}
gb_get_rom_name(gb,filename);
FIL fil;
fr=f_open(&fil,filename,FA_READ);
if (fr==FR_OK) {
f_read(&fil,ram,save_size,&bw);
} else {
printf("f_open(%s) error: %s (%d)\n",filename,FRESULT_str(fr),fr);
}
fr=f_close(&fil);
if(fr!=FR_OK) {
printf("f_close error: %s (%d)\n", FRESULT_str(fr), fr);
}
f_unmount(pSD->pcName);
}
printf("read_cart_ram_file(%s) COMPLETE (%lu bytes)\n",filename,save_size);
}
void write_cart_ram_file(struct gb_s *gb) {
char filename[16];
uint_fast32_t save_size;
UINT bw;
gb_get_rom_name(gb,filename);
save_size=gb_get_save_size(gb);
if(save_size>0) {
sd_card_t *pSD=sd_get_by_num(0);
FRESULT fr=f_mount(&pSD->fatfs,pSD->pcName,1);
if (FR_OK!=fr) {
printf("f_mount error: %s (%d)\n",FRESULT_str(fr),fr);
return;
}
FIL fil;
fr=f_open(&fil,filename,FA_CREATE_ALWAYS | FA_WRITE);
if (fr==FR_OK) {
f_write(&fil,ram,save_size,&bw);
} else {
printf("f_open(%s) error: %s (%d)\n",filename,FRESULT_str(fr),fr);
}
fr=f_close(&fil);
if(fr!=FR_OK) {
printf("f_close error: %s (%d)\n", FRESULT_str(fr), fr);
}
f_unmount(pSD->pcName);
}
printf("write_cart_ram_file(%s) COMPLETE (%lu bytes)\n",filename,save_size);
}
int main(void)
{
static struct gb_s gb;
@@ -386,7 +453,8 @@ int main(void)
/* Initialise USB serial connection for debugging. */
stdio_init_all();
//(void) getchar();
time_init();
sleep_ms(500);
putstdio("INIT: ");
/* Initialise GPIO pins. */
@@ -438,6 +506,7 @@ int main(void)
/* Initialise GB context. */
memcpy(rom_bank0, rom, sizeof(rom_bank0));
ret = gb_init(&gb, &gb_rom_read, &gb_cart_ram_read,
&gb_cart_ram_write, &gb_error, &gb_priv);
putstdio("GB ");
@@ -448,6 +517,9 @@ int main(void)
goto sleep;
}
/* Load Save File. */
read_cart_ram_file(&gb);
/* Update buttons state */
gb.direct.joypad_bits.up=gpio_get(GPIO_UP);
gb.direct.joypad_bits.down=gpio_get(GPIO_DOWN);
@@ -596,6 +668,10 @@ int main(void)
i2s_decrease_volume(&i2s_config);
}
#endif
if(!gb.direct.joypad_bits.start && prev_joypad_bits.start) {
write_cart_ram_file(&gb);
gb_reset(&gb);
}
}
/* Serial monitor commands */