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canio.h Go to the documentation of this file. #ifndef _CANIO_H_ #define _CANIO_H_ #if HAVE_CONFIG_H #include <config.h> #endif #if HAVE_STDINT_H #include <stdint.h> #endif #include <sys/types.h> #include <string.h> #include <stdio.h> // Copied this from <canlib.h>. I assume that it's portable across CAN // implementations. #ifndef canMSG_STD #define canMSG_STD 0x0002 #endif class CanPacket { public: long id; uint8_t msg[8]; uint32_t dlc; uint32_t flags; CanPacket() { memset(msg,0,sizeof(msg)); flags = canMSG_STD; dlc = 8; } uint16_t GetSlot(int s) const { return (uint16_t) ((msg[s*2] << 8) | (msg[s*2+1])); } void PutSlot(const int slot, const uint16_t val) { msg[slot*2] = (val >> 8) & 0xFF; msg[slot*2+1] = val & 0xFF; } void PutByte(const int byte, const uint16_t val) { msg[byte] = val & 0xFF; } char* toString() { static char buf[256]; sprintf(buf, "id:%04lX %02X %02X %02X %02X %02X %02X %02X %02X", id, msg[0], msg[1], msg[2], msg[3], msg[4], msg[5], msg[6], msg[7]); return buf; } }; #define DUALCAN_NR_CHANNELS 2 /* this class encapsulates the low level CAN stuff.... so it deals with reading and writing packets on the dual CAN channels. We make the assumption that we only have to read off of one channel though (looking at rmi_demo, it appears that this is OK.) A higher level entity will make sense of the packets, and call the read/write methods with the required timing. It wouldn't take much to make this an abstract base class so that the SegwayIO can use it, and then have different CAN hardwares implement the virtual methods. So then we can just drop in a new CAN hardware driver class and everything would still work. Would also be able to split up the files, so we could keep canio.[cc,h] in player, and the CAN hardware specific files can be local. */ class DualCANIO { public: DualCANIO() {} virtual int Init(long channel_freq) = 0; virtual int ReadPacket(CanPacket *pkt, int channel) = 0; virtual int WritePacket(CanPacket &pkt) = 0; virtual int Shutdown() = 0; }; #endif