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Serial buffer problem
SerialBuffered.h
- Committer:
- pd0wm
- Date:
- 2010-10-11
- Revision:
- 0:56a10c93329f
File content as of revision 0:56a10c93329f:
#pragma once // This is a buffered serial reading class, using the serial interrupt introduced in mbed library version 18 on 17/11/09 // In the simplest case, construct it with a buffer size at least equal to the largest message you // expect your program to receive in one go. class SerialBuffered : public Serial { public: SerialBuffered( size_t bufferSize, PinName tx, PinName rx ); virtual ~SerialBuffered(); int getc(); // will block till the next character turns up, or return -1 if there is a timeout int readable(); // returns 1 if there is a character available to read, 0 otherwise void setTimeout( float seconds ); // maximum time in seconds that getc() should block // while waiting for a character // Pass -1 to disable the timeout. size_t readBytes( uint8_t *bytes, size_t requested ); // read requested bytes into a buffer, // return number actually read, // which may be less than requested if there has been a timeout private: void handleInterrupt(); uint8_t *m_buff; // points at a circular buffer, containing data from m_contentStart, for m_contentSize bytes, wrapping when you get to the end uint16_t m_contentStart; // index of first bytes of content uint16_t m_contentEnd; // index of bytes after last byte of content uint16_t m_buffSize; float m_timeout; Timer m_timer; };