Samuel Mokrani / Mbed 2 deprecated USBMSD_SD_HelloWorld_Mbed

USBMSD SD card Hello World for Mbed platforms

Dependencies:   mbed USBMSD_SD USBDevice

USBDevice/USBSERIAL/CircBuffer.h@14:757226626acb, 2011-12-06 (annotated)

Committer:
samux
Date:
Tue Dec 06 12:07:12 2011 +0000
Revision:
14:757226626acb
protection enabled when usb cable plugged. filesystem has no access when plugged

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 14:757226626acb 1 #ifndef CIRCBUFFER_H
samux 14:757226626acb 2 #define CIRCBUFFER_H
samux 14:757226626acb 3
samux 14:757226626acb 4 template <class T>
samux 14:757226626acb 5 class CircBuffer {
samux 14:757226626acb 6 public:
samux 14:757226626acb 7 CircBuffer(int length) {
samux 14:757226626acb 8 write = 0;
samux 14:757226626acb 9 read = 0;
samux 14:757226626acb 10 size = length + 1;
samux 14:757226626acb 11 buf = (T *)malloc(size * sizeof(T));
samux 14:757226626acb 12 };
samux 14:757226626acb 13
samux 14:757226626acb 14 bool isFull() {
samux 14:757226626acb 15 return ((write + 1) % size == read);
samux 14:757226626acb 16 };
samux 14:757226626acb 17
samux 14:757226626acb 18 bool isEmpty() {
samux 14:757226626acb 19 return (read == write);
samux 14:757226626acb 20 };
samux 14:757226626acb 21
samux 14:757226626acb 22 void queue(T k) {
samux 14:757226626acb 23 if (isFull()) {
samux 14:757226626acb 24 read++;
samux 14:757226626acb 25 read %= size;
samux 14:757226626acb 26 }
samux 14:757226626acb 27 buf[write++] = k;
samux 14:757226626acb 28 write %= size;
samux 14:757226626acb 29 }
samux 14:757226626acb 30
samux 14:757226626acb 31 uint16_t available() {
samux 14:757226626acb 32 return (write >= read) ? write - read : size - read + write;
samux 14:757226626acb 33 };
samux 14:757226626acb 34
samux 14:757226626acb 35 bool dequeue(T * c) {
samux 14:757226626acb 36 bool empty = isEmpty();
samux 14:757226626acb 37 if (!empty) {
samux 14:757226626acb 38 *c = buf[read++];
samux 14:757226626acb 39 read %= size;
samux 14:757226626acb 40 }
samux 14:757226626acb 41 return(!empty);
samux 14:757226626acb 42 };
samux 14:757226626acb 43
samux 14:757226626acb 44 private:
samux 14:757226626acb 45 volatile uint16_t write;
samux 14:757226626acb 46 volatile uint16_t read;
samux 14:757226626acb 47 uint16_t size;
samux 14:757226626acb 48 T * buf;
samux 14:757226626acb 49 };
samux 14:757226626acb 50
samux 14:757226626acb 51 #endif