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Diff: SerialBase.h
- Revision:
- 2:e32c8485c88f
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- 1:a7c51b5e0534
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- 3:768173a57492
--- a/SerialBase.h Thu Apr 07 17:50:29 2016 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,223 +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_SERIALBASE_H -#define MBED_SERIALBASE_H - -#include "platform.h" - -#if DEVICE_SERIAL - -#include "Stream.h" -#include "FunctionPointer.h" -#include "serial_api.h" - -#if DEVICE_SERIAL_ASYNCH -#include "CThunk.h" -#include "dma_api.h" -#endif - -namespace mbed { - -/** A base class for serial port implementations - * Can't be instantiated directly (use Serial or RawSerial) - */ -class SerialBase { - -public: - /** Set the baud rate of the serial port - * - * @param baudrate The baudrate of the serial port (default = 9600). - */ - void baud(int baudrate); - - enum Parity { - None = 0, - Odd, - Even, - Forced1, - Forced0 - }; - - enum IrqType { - RxIrq = 0, - TxIrq - }; - - enum Flow { - Disabled = 0, - RTS, - CTS, - RTSCTS - }; - - /** Set the transmission format used by the serial port - * - * @param bits The number of bits in a word (5-8; default = 8) - * @param parity The parity used (SerialBase::None, SerialBase::Odd, SerialBase::Even, SerialBase::Forced1, SerialBase::Forced0; default = SerialBase::None) - * @param stop The number of stop bits (1 or 2; default = 1) - */ - void format(int bits=8, Parity parity=SerialBase::None, int stop_bits=1); - - /** Determine if there is a character available to read - * - * @returns - * 1 if there is a character available to read, - * 0 otherwise - */ - int readable(); - - /** Determine if there is space available to write a character - * - * @returns - * 1 if there is space to write a character, - * 0 otherwise - */ - int writeable(); - - /** Attach a function to call whenever a serial interrupt is generated - * - * @param fptr A pointer to a void function, or 0 to set as none - * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) - */ - void attach(void (*fptr)(void), IrqType type=RxIrq); - - /** Attach a member function to call whenever a serial 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 - * @param type Which serial interrupt to attach the member function to (Seriall::RxIrq for receive, TxIrq for transmit buffer empty) - */ - template<typename T> - void attach(T* tptr, void (T::*mptr)(void), IrqType type=RxIrq) { - if((mptr != NULL) && (tptr != NULL)) { - _irq[type].attach(tptr, mptr); - serial_irq_set(&_serial, (SerialIrq)type, 1); - } else { - serial_irq_set(&_serial, (SerialIrq)type, 0); - } - } - - /** Generate a break condition on the serial line - */ - void send_break(); - -#if DEVICE_SERIAL_FC - /** Set the flow control type on the serial port - * - * @param type the flow control type (Disabled, RTS, CTS, RTSCTS) - * @param flow1 the first flow control pin (RTS for RTS or RTSCTS, CTS for CTS) - * @param flow2 the second flow control pin (CTS for RTSCTS) - */ - void set_flow_control(Flow type, PinName flow1=NC, PinName flow2=NC); -#endif - - static void _irq_handler(uint32_t id, SerialIrq irq_type); - -#if DEVICE_SERIAL_ASYNCH - - /** Begin asynchronous write using 8bit buffer. The completition invokes registered TX event callback - * - * @param buffer The buffer where received data will be stored - * @param length The buffer length in bytes - * @param callback The event callback function - * @param event The logical OR of TX events - */ - int write(const uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE); - - /** Begin asynchronous write using 16bit buffer. The completition invokes registered TX event callback - * - * @param buffer The buffer where received data will be stored - * @param length The buffer length in bytes - * @param callback The event callback function - * @param event The logical OR of TX events - */ - int write(const uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_TX_COMPLETE); - - /** Abort the on-going write transfer - */ - void abort_write(); - - /** Begin asynchronous reading using 8bit buffer. The completition invokes registred RX event callback. - * - * @param buffer The buffer where received data will be stored - * @param length The buffer length in bytes - * @param callback The event callback function - * @param event The logical OR of RX events - * @param char_match The matching character - */ - int read(uint8_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_RX_COMPLETE, unsigned char char_match = SERIAL_RESERVED_CHAR_MATCH); - - /** Begin asynchronous reading using 16bit buffer. The completition invokes registred RX event callback. - * - * @param buffer The buffer where received data will be stored - * @param length The buffer length in bytes - * @param callback The event callback function - * @param event The logical OR of RX events - * @param char_match The matching character - */ - int read(uint16_t *buffer, int length, const event_callback_t& callback, int event = SERIAL_EVENT_RX_COMPLETE, unsigned char char_match = SERIAL_RESERVED_CHAR_MATCH); - - /** Abort the on-going read transfer - */ - void abort_read(); - - /** Configure DMA usage suggestion for non-blocking TX transfers - * - * @param usage The usage DMA hint for peripheral - * @return Zero if the usage was set, -1 if a transaction is on-going - */ - int set_dma_usage_tx(DMAUsage usage); - - /** Configure DMA usage suggestion for non-blocking RX transfers - * - * @param usage The usage DMA hint for peripheral - * @return Zero if the usage was set, -1 if a transaction is on-going - */ - int set_dma_usage_rx(DMAUsage usage); - -protected: - void start_read(void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event, unsigned char char_match); - void start_write(const void *buffer, int buffer_size, char buffer_width, const event_callback_t& callback, int event); - void interrupt_handler_asynch(void); -#endif - -protected: - SerialBase(PinName tx, PinName rx); - virtual ~SerialBase() { - } - - int _base_getc(); - int _base_putc(int c); - -#if DEVICE_SERIAL_ASYNCH - CThunk<SerialBase> _thunk_irq; - event_callback_t _tx_callback; - event_callback_t _rx_callback; - DMAUsage _tx_usage; - DMAUsage _rx_usage; -#endif - - serial_t _serial; - FunctionPointer _irq[2]; - int _baud; - -}; - -} // namespace mbed - -#endif - -#endif