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C++ Library for $50 robot Version 2
Submitted by Webbot on January 1, 2009 - 11:49pm.
This class wraps a character array into a buffer that may be accessed in a thread safe way. IE it can be accessed by your main program, as well as by interrupts. One of its main uses is to create a buffer for accessing the UART whereby you can read/write characters at the same time as the UART reads/writes characters. Or it may be used to write info to a logging output which may go to your PC, an LCD display etc.
To create a 48 byte buffer:-
uint8_t byteBuffer; // allocate the space
BUFFER buffer(byteBuffer); // wrap it into a safe buffer
uint8_t get(); // Get the next byte and remove it from the buffer, or 0 if it is empty
uint8_t get(uint16_t index); // Get the value from a given index (0=current), but don't remove it
void skip(uint16_t bytes); // Remove the next 'bytes' elements from the buffer
void flush(); // Clear the buffer
bool isFull(); // return 'true' if the buffer is full
bool isEmpty(); // return 'true' if the buffer is empty
bool put(uint8_t byte); // try to add 'byte' to the buffer. Return false if the buffer was full, or true if it was added ok