SD card file helloworld demo using new mbed RTOS ver 5 file driver setup. Pins setup for LPC1768 - read comment in code about project's json file requirements for adding the SD filesystem driver
SD card r/w demo for mbed OS version 5 on LPC1768.
File drivers are added in json file with "target.components_add": ["SD"] for use in most recent OS 5 version.
Test messages are sent to serial port with printf's.
main.cpp
- Committer:
- 4180_1
- Date:
- 2019-09-24
- Revision:
- 2:21d14147254e
- Parent:
- 1:3a59eb72e0cf
File content as of revision 2:21d14147254e:
#include "mbed.h" // NOTE: Need "target.components_add": ["SD"] in json project file! // This adds the filesystem driver below for SD cards in a project #include "SDBlockDevice.h" #include "FATFileSystem.h" Serial pc(USBTX,USBRX); //change for your mbed serial port SDBlockDevice sd(p5, p6, p7, p8); FATFileSystem fs("SD"); char filereadchar=0; int main() { sd.init(); fs.mount(&sd); // open and write a message in a new file FILE* fw = fopen("/SD/hi.txt", "w"); if(fw == NULL) { error("Could not open new file for write\n\r"); } printf("Writing to SD file: hello SD Card!\n\r"); fprintf(fw, "hello SD card!\n\r"); fclose(fw); printf("\nFile closed for write\n\n\r"); // open and read back file characters to serial for test FILE* fr = fopen("/SD/hi.txt", "r"); if(fr == NULL) { error("Could not open new file for read\n\r"); } printf("Reading back from new file: "); while(fscanf(fr,"%c",&filereadchar) == 1) { printf("\%c",filereadchar); } fclose(fr); sd.deinit(); fs.unmount(); printf("\nSD demo complete\n\r"); }