mirror of
https://github.com/aotta/PicoPAC
synced 2024-12-21 20:38:48 -05:00
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
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/*
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// PicoPAC MultiCART by Andrea Ottaviani 2024
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//
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// VIDEOPAC multicart based on Raspberry Pico board -
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//
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// More info on https://github.com/aotta/
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//
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// parts of code are directly from the A8PicoCart project by Robin Edwards 2023
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//
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// Needs to be a release NOT debug build for the cartridge emulation to work
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//
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// Edit myboard.h depending on the type of flash memory on the pico clone//
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//
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// v. 1.0 2024-08-05 : Initial version for Pi Pico
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//
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*/
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#include "ff.h"
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#include "diskio.h"
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#include "fatfs_disk.h"
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#include <stdio.h>
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#include "pico/stdlib.h"
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#include "hardware/flash.h"
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bool flashfs_is_mounted = false;
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bool mount_fatfs_disk()
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{
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int err = flash_fs_mount();
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if (err)
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return false;
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flashfs_is_mounted = true;
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return true;
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}
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bool fatfs_is_mounted() { return flashfs_is_mounted; }
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void create_fatfs_disk()
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{
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flash_fs_create();
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flashfs_is_mounted = true;
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// now create a fatfs on the flash_fs filesystem :-)
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FATFS fs; /* Filesystem object */
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FIL fil; /* File object */
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FRESULT res; /* API result code */
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BYTE work[FF_MAX_SS]; /* Work area (larger is better for processing time) */
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/* Format the default drive with default parameters */
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printf("making fatfs\n");
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res = f_mkfs("", 0, work, sizeof work);
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f_mount(&fs, "", 0);
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f_setlabel("PicoPAC");
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res = f_open(&fil, "WELCOME.TXT", FA_CREATE_NEW | FA_WRITE);
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f_puts("PicoPAC\r\n(c)2024 AOtta\r\nDrag ROM files in here!\r\n", &fil);
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f_close(&fil);
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f_mount(0, "", 0);
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}
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uint32_t fatfs_disk_read(uint8_t* buff, uint32_t sector, uint32_t count)
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{
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// printf("fatfs_disk_read sector=%d, count=%d\n", sector, count);
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if (!flashfs_is_mounted) return RES_ERROR;
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if (sector < 0 || sector >= SECTOR_NUM)
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return RES_PARERR;
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/* copy data to buffer */
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for (int i=0; i<count; i++)
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flash_fs_read_FAT_sector(sector + i, buff + (i*SECTOR_SIZE));
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return RES_OK;
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}
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uint32_t fatfs_disk_write(const uint8_t* buff, uint32_t sector, uint32_t count)
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{
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// printf("fatfs_disk_write sector=%d, count=%d\n", sector, count);
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if (!flashfs_is_mounted) return RES_ERROR;
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if (sector < 0 || sector >= SECTOR_NUM)
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return RES_PARERR;
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/* copy data to buffer */
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for (int i=0; i<count; i++) {
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flash_fs_write_FAT_sector(sector + i, buff + (i*SECTOR_SIZE));
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// verify
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if (!flash_fs_verify_FAT_sector(sector + i, buff + (i*SECTOR_SIZE))) {
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printf("VERIFY ERROR!");
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return RES_ERROR;
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}
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}
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return RES_OK;
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}
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void fatfs_disk_sync()
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{
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flash_fs_sync();
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}
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