mbed library sources 只保留l0和l1系列的库,修改l0的库的晶振为12m
Dependents: SANFAN_read_analog_value nucleo-wdg Nucleo_sleep_copy
Fork of mbed-src by
api/CAN.h
- Committer:
- emilmont
- Date:
- 2013-06-14
- Revision:
- 10:3bc89ef62ce7
- Parent:
- 9:0ce32e54c9a7
- Child:
- 13:0645d8841f51
File content as of revision 10:3bc89ef62ce7:
/* 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