Run a file system on the Dragonfly's SPI Flash.
Dependencies: SpiFlash25 flash-fs
main.cpp
- Committer:
- Leon Lindenfelser
- Date:
- 2020-06-26
- Revision:
- 0:54ec26dc283f
File content as of revision 0:54ec26dc283f:
/** Dragonfly Filesystem Example * Opens file in filesystem, prints contents of the file, and writes to the file. * * NOTE: This example changes the baud rate of the debug port to 115200 baud! */ #include "mbed.h" #include "SpiFlash25.h" #include "spiffs.h" #include <string> // This line controls the regulator's battery charger. // BC_NCE = 0 enables the battery charger // BC_NCE = 1 disables the battery charger DigitalOut bc_nce(PB_2); // this value represents the number of files you can have open at the same time // adjust it according to your requirements #define MAX_CONCURRENT_FDS 4 #define PAGE_SIZE 256 #define SECTOR_SIZE 64*1024 #define MEM_SIZE 2*1024*1024 static u8_t spiffs_work_buf[PAGE_SIZE * 2]; static u8_t spiffs_fds[32 * MAX_CONCURRENT_FDS]; static u8_t spiffs_cache_buf[(PAGE_SIZE + 32) * 4]; static SpiFlash25 flash(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS1); static spiffs fs; static spiffs_config cfg; // glue code between SPI driver and filesystem driver int spi_read(unsigned int addr, unsigned int size, unsigned char* data) { if (flash.read(addr, size, (char*)data)) return SPIFFS_OK; return -1; } int spi_write(unsigned int addr, unsigned int size, unsigned char* data) { if (flash.write(addr, size, (const char*)data)) return SPIFFS_OK; return -1; } int spi_erase(unsigned int addr, unsigned int size) { flash.clear_sector(addr); return SPIFFS_OK; } int main(void) { // Disable the battery charger unless a battery is attached. bc_nce = 1; int ret; int handle; char data[256]; char msg[] = "Hello World! The sneaky cat crept around the sleeping dog.\r\n"; char file[] = "test.txt"; string sdata; // configure the filesystem cfg.phys_size = MEM_SIZE; cfg.phys_addr = 0; cfg.phys_erase_block = SECTOR_SIZE; cfg.log_block_size = SECTOR_SIZE; cfg.log_page_size = PAGE_SIZE; cfg.hal_read_f = &spi_read; cfg.hal_write_f = &spi_write; cfg.hal_erase_f = &spi_erase; Serial pc(USBTX, USBRX); pc.baud(115200); printf("Dragonfly spi flash example started\r\n"); // erase entire flash // THIS WILL ERASE THE ENTIRE FLASH! EVERYTHING ON IT WILL BE LOST AND CANNOT BE RECOVERED! //flash.clear_mem(); // mount the filesystem ret = SPIFFS_mount(&fs, &cfg, spiffs_work_buf, spiffs_fds, sizeof(spiffs_fds), spiffs_cache_buf, sizeof(spiffs_cache_buf), NULL); if (ret) { printf("SPIFFS_mount failed %d - can't continue\r\n", ret); return 1; } // write to the file handle = SPIFFS_open(&fs, file, SPIFFS_CREAT | SPIFFS_RDWR | SPIFFS_APPEND, 0); if (handle < 0) printf("SPIFFS_open failed %d\r\n", SPIFFS_errno(&fs)); if (handle) { ret = SPIFFS_write(&fs, handle, msg, sizeof(msg)); if (ret < 0) printf("SPIFFS_write failed %d\r\n", SPIFFS_errno(&fs)); else printf("Wrote %d bytes\r\n", ret); SPIFFS_close(&fs, handle); } // read the current file contents spiffs_stat stat; memset(&stat, 0, sizeof(stat)); ret = SPIFFS_stat(&fs, file, &stat); if (ret) printf("SPIFFS_stat failed %d\r\n", SPIFFS_errno(&fs)); else printf("File size: %d bytes\r\n", stat.size); handle = SPIFFS_open(&fs, file, SPIFFS_RDWR, 0); if (handle < 0) printf("SPIFFS_open failed %d\r\n", SPIFFS_errno(&fs)); if (handle) { while (sdata.size() < stat.size) { ret = SPIFFS_read(&fs, handle, data, stat.size - sdata.size() < sizeof(data) ? stat.size - sdata.size() : sizeof(data)); if (ret < 0) { printf("SPIFFS_read failed %d\r\n", SPIFFS_errno(&fs)); continue; } printf("Read %d bytes\r\n", ret); sdata.append(data, ret); } printf("Data [\r\n"); for (int i = 0; i < sdata.size(); i++) printf("%c", sdata[i]); printf("\r\n]\r\n"); SPIFFS_close(&fs, handle); } printf("Dragonfly spi flash example finished\r\n\r\n"); return 0; }