MicroPython
USB msc example code
#11987
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MicroPython on ESP32 S3 doesn't support USB MSC mode. There's an open issue about it here: ESP32 S2/S3 USB MSC support? · Issue #8426 · micropython/micropython |
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I am trying to develop a project to run esp32 s3 as flashdisk and save my sensor data to this flashdisk. but I had not had the opportunity to get very involved with microtransactions before. and now I can't edit the sample code the way I want. I am able to run the code and create a .txt file with this code. and I can write whatever I want in this .txt file. but I cannot assign a variable to this .txt file.
In addition, I was able to create a maximum memory of 160 kb by making minor changes. I couldn't find how to increase this space either. when i run another sample code because it could support 2mb memory.
I've included the sample code I ran below.
#if ARDUINO_USB_MODE
#warning This sketch should be used when USB is in OTG mode
void setup(){}
void loop(){}
#else
#include "USB.h"
#include "USBMSC.h"
#if ARDUINO_USB_CDC_ON_BOOT
#define HWSerial Serial0
#define USBSerial Serial
#else
#define HWSerial Serial
USBCDC USBSerial;
#endif
USBMSC MSC;
#define ROOT_DIRECTORY_SECTOR_INDEX 19 // Root dizininin sektör indeksi
#define ROOT_DIRECTORY_ENTRY_SIZE 32 // Root dizinindeki her bir girişin boyutu (byte cinsinden)
#define ROOT_DIRECTORY_ENTRY_INDEX 0 // Root dizinindeki hedef girişin indeksi
#define FILE_DATA_OFFSET 64
#define FAT_U8(v) ((v) & 0xFF)
#define FAT_U16(v) FAT_U8(v), FAT_U8((v) >> 8)
#define FAT_U32(v) FAT_U8(v), FAT_U8((v) >> 8), FAT_U8((v) >> 16), FAT_U8((v) >> 24)
#define FAT_MS2B(s,ms) FAT_U8(((((s) & 0x1) * 1000) + (ms)) / 10)
#define FAT_HMS2B(h,m,s) FAT_U8(((s) >> 1)|(((m) & 0x7) << 5)), FAT_U8((((m) >> 3) & 0x7)|((h) << 3))
#define FAT_YMD2B(y,m,d) FAT_U8(((d) & 0x1F)|(((m) & 0x7) << 5)), FAT_U8((((m) >> 3) & 0x1)|((((y) - 1980) & 0x7F) << 1))
#define FAT_TBL2B(l,h) FAT_U8(l), FAT_U8(((l >> 8) & 0xF) | ((h << 4) & 0xF0)), FAT_U8(h >> 4)
#define README_CONTENTS "Here is your file. Do whatever you want. \r\n\r\n <3<3<3<3"
static const uint32_t DISK_SECTOR_COUNT = 64 * 8; // 8KB is the smallest size that windows allow to mount
static const uint16_t DISK_SECTOR_SIZE = 512; // Should be 512
static const uint16_t DISC_SECTORS_PER_TABLE = 1; //each table sector can fit 170KB (340 sectors)
static uint8_t msc_disk[DISK_SECTOR_COUNT][DISK_SECTOR_SIZE] =
{
//------------- Block0: Boot Sector -------------//
{
// Header (62 bytes)
0xEB, 0x3C, 0x90, //jump_instruction
'M' , 'S' , 'D' , 'O' , 'S' , '5' , '.' , '0' , //oem_name
FAT_U16(DISK_SECTOR_SIZE), //bytes_per_sector
FAT_U8(1), //sectors_per_cluster
FAT_U16(1), //reserved_sectors_count
FAT_U8(1), //file_alloc_tables_num
FAT_U16(16), //max_root_dir_entries
FAT_U16(DISK_SECTOR_COUNT), //fat12_sector_num
0xF8, //media_descriptor
FAT_U16(DISC_SECTORS_PER_TABLE), //sectors_per_alloc_table;//FAT12 and FAT16
FAT_U16(1), //sectors_per_track;//A value of 0 may indicate LBA-only access
FAT_U16(1), //num_heads
FAT_U32(0), //hidden_sectors_count
FAT_U32(0), //total_sectors_32
0x00, //physical_drive_number;0x00 for (first) removable media, 0x80 for (first) fixed disk
0x00, //reserved
0x29, //extended_boot_signature;//should be 0x29
FAT_U32(0x1234), //serial_number: 0x1234 => 1234
'T' , 'i' , 'n' , 'y' , 'U' , 'S' , 'B' , ' ' , 'M' , 'S' , 'C' , //volume_label padded with spaces (0x20)
'F' , 'A' , 'T' , '1' , '2' , ' ' , ' ' , ' ' , //file_system_type padded with spaces (0x20)
},
//------------- Block1: FAT12 Table -------------//
{
FAT_TBL2B(0xFF8, 0xFFF), FAT_TBL2B(0xFFF, 0x000) // first 2 entries must be 0xFF8 0xFFF, third entry is cluster end of readme file
},
//------------- Block2: Root Directory -------------//
{
// first entry is volume label
'E' , 'S' , 'P' , '3' , '2' , 'S' , '2' , ' ' ,
'M' , 'S' , 'C' ,
0x08, //FILE_ATTR_VOLUME_LABEL
0x00,
FAT_MS2B(0,0),
FAT_HMS2B(0,0,0),
FAT_YMD2B(0,0,0),
FAT_YMD2B(0,0,0),
FAT_U16(0),
FAT_HMS2B(13,42,30), //last_modified_hms
FAT_YMD2B(2018,11,5), //last_modified_ymd
FAT_U16(0),
FAT_U32(0),
},
//------------- Block3: Readme Content -------------//
README_CONTENTS
};
static int32_t onWrite(uint32_t lba, uint32_t offset, uint8_t* buffer, uint32_t bufsize){
HWSerial.printf("MSC WRITE: lba: %u, offset: %u, bufsize: %u\n", lba, offset, bufsize);
memcpy(msc_disk[lba] + offset, buffer, bufsize);
return bufsize;
}
static int32_t onRead(uint32_t lba, uint32_t offset, void* buffer, uint32_t bufsize){
HWSerial.printf("MSC READ: lba: %u, offset: %u, bufsize: %u\n", lba, offset, bufsize);
memcpy(buffer, msc_disk[lba] + offset, bufsize);
return bufsize;
}
static bool onStartStop(uint8_t power_condition, bool start, bool load_eject) {
String myVariable = "i just wanna dance wwith you";
if (start && load_eject) {
// USB bağlandığında
// myFile.txt dosyasını oluşturma ve içine yazma işlemi
uint8_t fileEntry[32];
memset(fileEntry, 0, sizeof(fileEntry));
}
return true;
}
static void usbEventCallback(void* arg, esp_event_base_t event_base, int32_t event_id, void* event_data){
if(event_base == ARDUINO_USB_EVENTS){
arduino_usb_event_data_t * data = (arduino_usb_event_data_t*)event_data;
switch (event_id){
case ARDUINO_USB_STARTED_EVENT:
HWSerial.println("USB PLUGGED");
break;
case ARDUINO_USB_STOPPED_EVENT:
HWSerial.println("USB UNPLUGGED");
break;
case ARDUINO_USB_SUSPEND_EVENT:
HWSerial.printf("USB SUSPENDED: remote_wakeup_en: %u\n", data->suspend.remote_wakeup_en);
break;
case ARDUINO_USB_RESUME_EVENT:
HWSerial.println("USB RESUMED");
break;
}
}
void setup() {
HWSerial.begin(115200);
HWSerial.setDebugOutput(true);
USB.onEvent(usbEventCallback);
MSC.vendorID("ESP32");//max 8 chars
MSC.productID("USB_MSC");//max 16 chars
MSC.productRevision("1.0");//max 4 chars
MSC.onStartStop(onStartStop);
MSC.onRead(onRead);
MSC.onWrite(onWrite);
MSC.mediaPresent(true);
MSC.begin(DISK_SECTOR_COUNT, DISK_SECTOR_SIZE);
USBSerial.begin();
USB.begin();
}
void loop() {
// put your main code here, to run repeatedly:
}
#endif /* ARDUINO_USB_MODE */
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