USBMSD SD card Hello World for Mbed platforms
Dependencies: mbed USBMSD_SD USBDevice
Diff: USBDevice/USBSERIAL/CircBuffer.h
- Revision:
- 16:c753717bfd4d
- Parent:
- 15:f848b71c4440
- Child:
- 17:364ef42e502d
diff -r f848b71c4440 -r c753717bfd4d USBDevice/USBSERIAL/CircBuffer.h --- a/USBDevice/USBSERIAL/CircBuffer.h Tue Dec 06 14:07:51 2011 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,51 +0,0 @@ -#ifndef CIRCBUFFER_H -#define CIRCBUFFER_H - -template <class T> -class CircBuffer { -public: - CircBuffer(int length) { - write = 0; - read = 0; - size = length + 1; - buf = (T *)malloc(size * sizeof(T)); - }; - - bool isFull() { - return ((write + 1) % size == read); - }; - - bool isEmpty() { - return (read == write); - }; - - void queue(T k) { - if (isFull()) { - read++; - read %= size; - } - buf[write++] = k; - write %= size; - } - - uint16_t available() { - return (write >= read) ? write - read : size - read + write; - }; - - bool dequeue(T * c) { - bool empty = isEmpty(); - if (!empty) { - *c = buf[read++]; - read %= size; - } - return(!empty); - }; - -private: - volatile uint16_t write; - volatile uint16_t read; - uint16_t size; - T * buf; -}; - -#endif