Nuvoton
/
NuMaker-mbed-SPIF-FileSystem-example
NuMaker SPI flash-backed file system
main.cpp
- Committer:
- ccli8
- Date:
- 2022-03-09
- Revision:
- 9:6ce52eb7b6c4
- Parent:
- 8:47803c22154e
- Child:
- 10:f866fc9e7387
File content as of revision 9:6ce52eb7b6c4:
/* mbed Microcontroller Library * Copyright (c) 2006-2019 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include "mbed.h" #include <stdio.h> #include <errno.h> #include "SPIFBlockDevice.h" // Maximum number of elements in buffer #define BUFFER_MAX_LEN 10 #if defined(TARGET_NUMAKER_PFM_M487) || defined(TARGET_NUMAKER_IOT_M487) /* We needn't write-protect and hold functions. Configure /WP and /HOLD pins to high. */ DigitalOut onboard_spi_wp(PC_5, 1); DigitalOut onboard_spi_hold(PC_4, 1); #endif BlockDevice *bd = new SPIFBlockDevice(MBED_CONF_SPIF_DRIVER_SPI_MOSI, MBED_CONF_SPIF_DRIVER_SPI_MISO, MBED_CONF_SPIF_DRIVER_SPI_CLK, MBED_CONF_SPIF_DRIVER_SPI_CS); // This example uses LittleFileSystem as the default file system #include "LittleFileSystem.h" LittleFileSystem fs("fs"); // Uncomment the following two lines and comment the previous two to use FAT file system. // #include "FATFileSystem.h" // FATFileSystem fs("fs"); // Support bare-metal build in which RTOS will be absent #if MBED_CONF_RTOS_PRESENT // Set up the button to trigger an erase InterruptIn irq(BUTTON1); void erase() { printf("Initializing the block device... "); fflush(stdout); int err = bd->init(); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { error("error: %s (%d)\n", strerror(-err), err); } printf("Erasing the block device... "); fflush(stdout); err = bd->erase(0, bd->size()); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { error("error: %s (%d)\n", strerror(-err), err); } printf("Deinitializing the block device... "); fflush(stdout); err = bd->deinit(); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { error("error: %s (%d)\n", strerror(-err), err); } } #endif #if MBED_CONF_RTOS_PRESENT #if MBED_MAJOR_VERSION >= 6 static auto erase_event = mbed_event_queue()->make_user_allocated_event(erase); #endif #endif // Entry point for the example int main() { printf("--- Mbed OS filesystem example ---\n"); #if MBED_CONF_RTOS_PRESENT // Setup the erase event on button press, use the event queue // to avoid running in interrupt context #if MBED_MAJOR_VERSION >= 6 irq.fall(std::ref(erase_event)); #else irq.fall(mbed_event_queue()->event(erase)); #endif #endif // Try to mount the filesystem printf("Mounting the filesystem... "); fflush(stdout); int err = fs.mount(bd); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { // Reformat if we can't mount the filesystem // this should only happen on the first boot printf("No filesystem found, formatting... "); fflush(stdout); err = fs.reformat(bd); printf("%s\n", (err ? "Fail :(" : "OK")); if (err) { error("error: %s (%d)\n", strerror(-err), err); } } // Open the numbers file printf("Opening \"/fs/numbers.txt\"... "); fflush(stdout); FILE *f = fopen("/fs/numbers.txt", "r+"); printf("%s\n", (!f ? "Fail :(" : "OK")); if (!f) { // Create the numbers file if it doesn't exist printf("No file found, creating a new file... "); fflush(stdout); f = fopen("/fs/numbers.txt", "w+"); printf("%s\n", (!f ? "Fail :(" : "OK")); if (!f) { error("error: %s (%d)\n", strerror(errno), -errno); } for (int i = 0; i < 10; i++) { printf("\rWriting numbers (%d/%d)... ", i, 10); fflush(stdout); err = fprintf(f, " %d\n", i); if (err < 0) { printf("Fail :(\n"); error("error: %s (%d)\n", strerror(errno), -errno); } } printf("\rWriting numbers (%d/%d)... OK\n", 10, 10); printf("Seeking file... "); fflush(stdout); err = fseek(f, 0, SEEK_SET); printf("%s\n", (err < 0 ? "Fail :(" : "OK")); if (err < 0) { error("error: %s (%d)\n", strerror(errno), -errno); } } // Go through and increment the numbers for (int i = 0; i < 10; i++) { printf("\rIncrementing numbers (%d/%d)... ", i, 10); fflush(stdout); // Get current stream position long pos = ftell(f); // Parse out the number and increment char buf[BUFFER_MAX_LEN]; if (!fgets(buf, BUFFER_MAX_LEN, f)) { error("error: %s (%d)\n", strerror(errno), -errno); } char *endptr; int32_t number = strtol(buf, &endptr, 10); if ( (errno == ERANGE) || // The number is too small/large (endptr == buf) || // No character was read (*endptr && *endptr != '\n') // The whole input was not converted ) { continue; } number += 1; // Seek to beginning of number fseek(f, pos, SEEK_SET); // Store number fprintf(f, " %d\n", number); // Flush between write and read on same file fflush(f); } printf("\rIncrementing numbers (%d/%d)... OK\n", 10, 10); // Close the file which also flushes any cached writes printf("Closing \"/fs/numbers.txt\"... "); fflush(stdout); err = fclose(f); printf("%s\n", (err < 0 ? "Fail :(" : "OK")); if (err < 0) { error("error: %s (%d)\n", strerror(errno), -errno); } // Display the root directory printf("Opening the root directory... "); fflush(stdout); DIR *d = opendir("/fs/"); printf("%s\n", (!d ? "Fail :(" : "OK")); if (!d) { error("error: %s (%d)\n", strerror(errno), -errno); } printf("root directory:\n"); while (true) { struct dirent *e = readdir(d); if (!e) { break; } printf(" %s\n", e->d_name); } printf("Closing the root directory... "); fflush(stdout); err = closedir(d); printf("%s\n", (err < 0 ? "Fail :(" : "OK")); if (err < 0) { error("error: %s (%d)\n", strerror(errno), -errno); } // Display the numbers file printf("Opening \"/fs/numbers.txt\"... "); fflush(stdout); f = fopen("/fs/numbers.txt", "r"); printf("%s\n", (!f ? "Fail :(" : "OK")); if (!f) { error("error: %s (%d)\n", strerror(errno), -errno); } printf("numbers:\n"); while (!feof(f)) { int c = fgetc(f); printf("%c", c); } printf("\rClosing \"/fs/numbers.txt\"... "); fflush(stdout); err = fclose(f); printf("%s\n", (err < 0 ? "Fail :(" : "OK")); if (err < 0) { error("error: %s (%d)\n", strerror(errno), -errno); } // Tidy up printf("Unmounting... "); fflush(stdout); err = fs.unmount(); printf("%s\n", (err < 0 ? "Fail :(" : "OK")); if (err < 0) { error("error: %s (%d)\n", strerror(-err), err); } printf("Mbed OS filesystem example done!\n"); }