USBMSD SD card Hello World for Mbed platforms
Dependencies: mbed USBMSD_SD USBDevice
USBDevice/USBSERIAL/CBuffer.h
- Committer:
- samux
- Date:
- 2011-11-11
- Revision:
- 2:27a7e7f8d399
File content as of revision 2:27a7e7f8d399:
#ifndef CBUFFER_H #define CBUFFER_H #define MAX_BUF 128 class CBuffer { public: CBuffer() { write = 0; read = 0; size = MAX_BUF + 1; }; bool isFull() { return ((write + 1) % size == read); }; bool isEmpty() { return (read == write); }; void queue(uint8_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(uint8_t * c) { if (!isEmpty()) { *c = buf[read++]; read %= size; } return(isEmpty()); }; private: volatile uint16_t write; volatile uint16_t read; uint16_t size; uint8_t buf[MAX_BUF + 1]; }; #endif