Shivanand Gowda / Mbed OS barcode_reader

USB BARCODE READER

Dependencies:   USBHOST

main.cpp@1:a12f904713ed, 2017-02-17 (annotated)

Committer:
jamike
Date:
Fri Feb 17 12:04:00 2017 +0000
Revision:
1:a12f904713ed
Parent:
0:0282e73ca55b
Child:
2:107b7b44bd35
Fix MSD (improve NYET handling)

Who changed what in which revision?

UserRevisionLine numberNew contents of line
jamike 0:0282e73ca55b 1 #include "mbed.h"
jamike 0:0282e73ca55b 2 #include "USBHostMSD.h"
jamike 0:0282e73ca55b 3 DigitalOut led(LED1);
jamike 0:0282e73ca55b 4 void msd_task(void const *) {
jamike 0:0282e73ca55b 5 printf("init msd\n");
jamike 1:a12f904713ed 6 USBHostMSD *msd;
jamike 0:0282e73ca55b 7 int i = 0;
jamike 0:0282e73ca55b 8 printf("wait for usb memory stick insertion\n");
jamike 0:0282e73ca55b 9 while(1) {
jamike 1:a12f904713ed 10 msd = new USBHostMSD("usb");
jamike 0:0282e73ca55b 11 // try to connect a MSD device
jamike 1:a12f904713ed 12 while(!msd->connect()) {
jamike 0:0282e73ca55b 13 Thread::wait(500);
jamike 0:0282e73ca55b 14 }
jamike 0:0282e73ca55b 15
jamike 0:0282e73ca55b 16 // in a loop, append a file
jamike 0:0282e73ca55b 17 // if the device is disconnected, we try to connect it again
jamike 0:0282e73ca55b 18
jamike 0:0282e73ca55b 19 // append a file
jamike 0:0282e73ca55b 20 FILE * fp = fopen("/usb/test1.txt", "a");
jamike 0:0282e73ca55b 21
jamike 0:0282e73ca55b 22 if (fp != NULL) {
jamike 0:0282e73ca55b 23 fprintf(fp, "Hello fun SD Card World: %d!\r\n", i++);
jamike 0:0282e73ca55b 24 printf("Goodbye World!\r\n");
jamike 0:0282e73ca55b 25 fclose(fp);
jamike 0:0282e73ca55b 26 } else {
jamike 0:0282e73ca55b 27 printf("FILE == NULL\r\n");
jamike 0:0282e73ca55b 28 }
jamike 0:0282e73ca55b 29 Thread::wait(500);
jamike 0:0282e73ca55b 30 printf("again\n");
jamike 0:0282e73ca55b 31 // if device disconnected, try to connect again
jamike 1:a12f904713ed 32 while (msd->connected()) {
jamike 0:0282e73ca55b 33 Thread::wait(500);
jamike 0:0282e73ca55b 34 }
jamike 1:a12f904713ed 35 delete msd;
jamike 0:0282e73ca55b 36 }
jamike 0:0282e73ca55b 37 }
jamike 0:0282e73ca55b 38
jamike 0:0282e73ca55b 39 int main() {
jamike 0:0282e73ca55b 40 Thread msdTask(msd_task, NULL, osPriorityNormal, 1024 * 4);
jamike 0:0282e73ca55b 41 while(1) {
jamike 0:0282e73ca55b 42 led=!led;
jamike 0:0282e73ca55b 43 Thread::wait(500);
jamike 0:0282e73ca55b 44 }
jamike 0:0282e73ca55b 45 }