RAM Disk function using Mbed os5 standard library
Please refer following my Notebook page.
/users/kenjiArai/notebook/sd-card-control-new/#
main.cpp
- Committer:
- kenjiArai
- Date:
- 2018-04-07
- Revision:
- 0:308d4fafaafb
- Child:
- 1:58fc0cbd9a41
File content as of revision 0:308d4fafaafb:
/* * Mbed Application program * RAM Disck function with FatFs on Mbed-os5 * * Copyright (c) 2018 Kenji Arai / JH1PJL * http://www.page.sannet.ne.jp/kenjia/index.html * https://os.mbed.com/users/kenjiArai/ * Created: April 7th, 2018 * Revised: April 7th, 2018 */ // Include -------------------------------------------------------------------- #include "mbed.h" #include "FATFileSystem.h" #include "HeapBlockDevice.h" #include "mon.h" #include <stdlib.h> #include <stdio.h> #include <errno.h> // Definition ----------------------------------------------------------------- #if defined(TARGET_DISCO_F769NI) #define USER_SW_ON 1 #else #define USER_SW_ON 0 #endif #define DISK_SIZE_LIMIT (5 * 512) // Constructor ---------------------------------------------------------------- DigitalOut led(LED1); DigitalIn user_sw(USER_BUTTON); Serial pc(USBTX, USBRX, 115200); HeapBlockDevice bd(128 * 512, 512); // Keep 64KB area FATFileSystem fs("fs"); // RAM ------------------------------------------------------------------------ // ROM / Constant data -------------------------------------------------------- char *const opening_msg0 = "RAM Disk (use Heap area) test program"; char *const opening_msg1 = " -> run on Mbed OS-5\r\n"; // Function prototypes -------------------------------------------------------- void return_error (int ret_val); void errno_error (void* ret_val); //------------------------------------------------------------------------------ // Control Program //------------------------------------------------------------------------------ int main() { time_t seconds; uint32_t data0 = 10000U; uint32_t data1 = 20000U; uint32_t data2 = 30000U; uint32_t data3 = 40000U; uint32_t data4 = 50000U; uint32_t data5 = 60000U; if (user_sw == USER_SW_ON) { mon(); } //pc.printf("line:%d\r\n", __LINE__); pc.printf("\r\nStart\r\n"); int error = 0; pc.printf("Welcome to the filesystem example.\r\n"); pc.printf("Mounting the filesystem on \"/fs\". \r\n"); pc.printf("Formatting a FAT, RAM-backed filesystem.\r\n"); error = FATFileSystem::format(&bd); return_error(error); pc.printf("Mounting the filesystem on \"/fs\". \r\n"); error = fs.mount(&bd); return_error(error); FILE* fp = fopen("/fs/mydata.txt", "a"); errno_error(fp); if (fp != 0) { pc.printf("%s%s", opening_msg0, opening_msg1); fprintf(fp,"%s%s", opening_msg0, opening_msg1); } else { pc.printf("ERROR\r\n"); } fclose(fp); while (pc.readable()) { char c = pc.getc(); // dummy read } while (true) { uint32_t size = get_disk_freespace(); pc.printf("free %u ", size); fp = fopen("/fs/mydata.txt", "a"); if (size <= DISK_SIZE_LIMIT) { pc.printf("Reached RAM Disk size limitation!!\r\n"); break; } if(fp != 0) { char tmp[64]; seconds = time(NULL); strftime(tmp, 64, "DATE %H:%M:%S,%Y/%m/%d,", localtime(&seconds)); pc.printf(tmp); fprintf(fp, "%s", tmp); pc.printf("%08d;%08d;%08d;%08d;%08d;%08d\r\n", ++data0, ++data1, ++data2, ++data3, ++data4, ++data5); fprintf(fp, "%08d;%08d;%08d;%08d;%08d;%08d\r\n", data0, data1, data2, data3, data4, data5); } else { pc.printf("ERROR\r\n"); } fclose(fp); Thread::wait(100); if (user_sw == USER_SW_ON) { break; } if (pc.readable()) { mon(); } led = !led; } while(true) { mon(); NVIC_SystemReset(); } } void return_error (int ret_val) { if (ret_val) { pc.printf("retrun error/Failure. %d\r\n", ret_val); } } void errno_error (void* ret_val) { if (ret_val == NULL) { pc.printf("error #/Failure. %d \r\n", errno); } }