mbed library sources
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Diff: cpp/CAN.h
- Revision:
- 9:0ce32e54c9a7
- Parent:
- 8:4e25b8576136
- Child:
- 10:3bc89ef62ce7
--- a/cpp/CAN.h Thu May 30 16:59:31 2013 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,196 +0,0 @@ -/* mbed Microcontroller Library - * Copyright (c) 2006-2013 ARM Limited - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -#ifndef MBED_CAN_H -#define MBED_CAN_H - -#include "platform.h" - -#if DEVICE_CAN - -#include "can_api.h" -#include "can_helper.h" -#include "FunctionPointer.h" - -namespace mbed { - -/** CANMessage class - */ -class CANMessage : public CAN_Message { - -public: - /** Creates empty CAN message. - */ - CANMessage() { - len = 8; - type = CANData; - format = CANStandard; - id = 0; - memset(data, 0, 8); - } - - /** Creates CAN message with specific content. - */ - CANMessage(int _id, const char *_data, char _len = 8, CANType _type = CANData, CANFormat _format = CANStandard) { - len = _len & 0xF; - type = _type; - format = _format; - id = _id; - memcpy(data, _data, _len); - } - - /** Creates CAN remote message. - */ - CANMessage(int _id, CANFormat _format = CANStandard) { - len = 0; - type = CANRemote; - format = _format; - id = _id; - memset(data, 0, 8); - } -}; - -/** A can bus client, used for communicating with can devices - */ -class CAN { - -public: - /** Creates an CAN interface connected to specific pins. - * - * @param rd read from transmitter - * @param td transmit to transmitter - * - * Example: - * @code - * #include "mbed.h" - * - * Ticker ticker; - * DigitalOut led1(LED1); - * DigitalOut led2(LED2); - * CAN can1(p9, p10); - * CAN can2(p30, p29); - * - * char counter = 0; - * - * void send() { - * if(can1.write(CANMessage(1337, &counter, 1))) { - * printf("Message sent: %d\n", counter); - * counter++; - * } - * led1 = !led1; - * } - * - * int main() { - * ticker.attach(&send, 1); - * CANMessage msg; - * while(1) { - * if(can2.read(msg)) { - * printf("Message received: %d\n\n", msg.data[0]); - * led2 = !led2; - * } - * wait(0.2); - * } - * } - * @endcode - */ - CAN(PinName rd, PinName td); - virtual ~CAN(); - - /** Set the frequency of the CAN interface - * - * @param hz The bus frequency in hertz - * - * @returns - * 1 if successful, - * 0 otherwise - */ - int frequency(int hz); - - /** Write a CANMessage to the bus. - * - * @param msg The CANMessage to write. - * - * @returns - * 0 if write failed, - * 1 if write was successful - */ - int write(CANMessage msg); - - /** Read a CANMessage from the bus. - * - * @param msg A CANMessage to read to. - * - * @returns - * 0 if no message arrived, - * 1 if message arrived - */ - int read(CANMessage &msg); - - /** Reset CAN interface. - * - * To use after error overflow. - */ - void reset(); - - /** Puts or removes the CAN interface into silent monitoring mode - * - * @param silent boolean indicating whether to go into silent mode or not - */ - void monitor(bool silent); - - /** Returns number of read errors to detect read overflow errors. - */ - unsigned char rderror(); - - /** Returns number of write errors to detect write overflow errors. - */ - unsigned char tderror(); - - /** Attach a function to call whenever a CAN frame received interrupt is - * generated. - * - * @param fptr A pointer to a void function, or 0 to set as none - */ - void attach(void (*fptr)(void)); - - /** Attach a member function to call whenever a CAN frame received interrupt - * is generated. - * - * @param tptr pointer to the object to call the member function on - * @param mptr pointer to the member function to be called - */ - template<typename T> - void attach(T* tptr, void (T::*mptr)(void)) { - if((mptr != NULL) && (tptr != NULL)) { - _rxirq.attach(tptr, mptr); - setup_interrupt(); - } else { - remove_interrupt(); - } - } - -private: - can_t _can; - FunctionPointer _rxirq; - - void setup_interrupt(void); - void remove_interrupt(void); -}; - -} // namespace mbed - -#endif - -#endif // MBED_CAN_H