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Transistor Gijutsu, October 2014, Special Features Chapter 9, Software of the Function Generator トランジスタ技術2014年10月号 特集第9章のソフトウェア わがまま波形発生器のソフトウェア
Information
tg_201410s8_AD7714 トランジスタ技術 2014年 10月号 第9章のソフトウェア
Program for Section 9 in October. 2014 issue of the Transistor Gijutsu
(Japanese electronics magazine)
概要
このプログラムは、ソフトウエアDDSにより、任意の波形を出力(2ch)します。 特徴は次のとおりです。
- PWM出力をDAコンバータとして利用します。
- 周波数や波形、バースト条件などを個別に設定できる独立した出力を2チャネル持っています。
- 周波数分解能0.023mHz
- 周波数範囲0.023mHz~10kHz
- 各チャネルにそれぞれ、波形の先頭で出力されるトリガ出力があります。
- 出力波形を関数で定義できます。
- 休止波数、出力波数、を設定することでバースト波形が出力できます。
ファイル
このソフトウエアは、次のファイルから構成されています。
- DDS.cpp - DDSによる波形発生
- main.cpp - main()関数
詳細については、10月号の記事および上記ファイル中のコメントを参照してください。
USBDevice/USBSerial/USBSerial.h
- Committer:
- Dance
- Date:
- 2014-08-29
- Revision:
- 0:f1ecca559ec3
File content as of revision 0:f1ecca559ec3:
/* Copyright (c) 2010-2011 mbed.org, MIT License * * Permission is hereby granted, free of charge, to any person obtaining a copy of this software * and associated documentation files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all copies or * substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ #ifndef USBSERIAL_H #define USBSERIAL_H #include "USBCDC.h" #include "Stream.h" #include "CircBuffer.h" /** * USBSerial example * * @code * #include "mbed.h" * #include "USBSerial.h" * * //Virtual serial port over USB * USBSerial serial; * * int main(void) { * * while(1) * { * serial.printf("I am a virtual serial port\n"); * wait(1); * } * } * @endcode */ class USBSerial: public USBCDC, public Stream { public: /** * Constructor * * @param vendor_id Your vendor_id (default: 0x1f00) * @param product_id Your product_id (default: 0x2012) * @param product_release Your preoduct_release (default: 0x0001) * @param connect_blocking define if the connection must be blocked if USB not plugged in * */ USBSerial(uint16_t vendor_id = 0x1f00, uint16_t product_id = 0x2012, uint16_t product_release = 0x0001, bool connect_blocking = true): USBCDC(vendor_id, product_id, product_release, connect_blocking), buf(128){ settingsChangedCallback = 0; }; /** * Send a character. You can use puts, printf. * * @param c character to be sent * @returns true if there is no error, false otherwise */ virtual int _putc(int c); /** * Read a character: blocking * * @returns character read */ virtual int _getc(); /** * Check the number of bytes available. * * @returns the number of bytes available */ uint8_t available(); /** Determine if there is a character available to read * * @returns * 1 if there is a character available to read, * 0 otherwise */ int readable() { return available() ? 1 : 0; } /** Determine if there is space available to write a character * * @returns * 1 if there is space to write a character, * 0 otherwise */ int writeable() { return 1; } // always return 1, for write operation is blocking /** * Write a block of data. * * For more efficiency, a block of size 64 (maximum size of a bulk endpoint) has to be written. * * @param buf pointer on data which will be written * @param size size of the buffer. The maximum size of a block is limited by the size of the endpoint (64 bytes) * * @returns true if successfull */ bool writeBlock(uint8_t * buf, uint16_t size); /** * Attach a member function to call when a packet is received. * * @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)) { rx.attach(tptr, mptr); } } /** * Attach a callback called when a packet is received * * @param fptr function pointer */ void attach(void (*fptr)(void)) { if(fptr != NULL) { rx.attach(fptr); } } /** * Attach a callback to call when serial's settings are changed. * * @param fptr function pointer */ void attach(void (*fptr)(int baud, int bits, int parity, int stop)) { settingsChangedCallback = fptr; } protected: virtual bool EP2_OUT_callback(); virtual void lineCodingChanged(int baud, int bits, int parity, int stop){ if (settingsChangedCallback) { settingsChangedCallback(baud, bits, parity, stop); } } private: FunctionPointer rx; CircBuffer<uint8_t> buf; void (*settingsChangedCallback)(int baud, int bits, int parity, int stop); }; #endif