00001 00035 #ifndef UM7_COMMS_H_ 00036 #define UM7_COMMS_H_ 00037 00038 #include <stdint.h> 00039 #include <string> 00040 00041 namespace serial 00042 { 00043 class Serial; 00044 } 00045 00046 namespace um7 00047 { 00048 00049 class SerialTimeout : public std::exception {}; 00050 00051 class BadChecksum : public std::exception {}; 00052 00053 class Registers; 00054 class Accessor_; 00055 00056 class Comms 00057 { 00058 public: 00059 explicit Comms(serial::Serial* s) : serial_(s), first_spin_(true) 00060 { 00061 } 00062 00069 int16_t receive(Registers* r); 00070 00071 void send(const Accessor_& a) const; 00072 00073 bool sendWaitAck(const Accessor_& a); 00074 00075 static const uint8_t PACKET_HAS_DATA; 00076 static const uint8_t PACKET_IS_BATCH; 00077 static const uint8_t PACKET_BATCH_LENGTH_MASK; 00078 static const uint8_t PACKET_BATCH_LENGTH_OFFSET; 00079 00080 static std::string checksum(const std::string& s); 00081 00082 static std::string message(uint8_t address, std::string data); 00083 00084 private: 00085 bool first_spin_; 00086 serial::Serial* serial_; 00087 }; 00088 } // namespace um7 00089 00090 #endif // UM7_COMMS_H 00091