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/USBCDC.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 USBCDC_H #define USBCDC_H /* These headers are included for child class. */ #include "USBEndpoints.h" #include "USBDescriptor.h" #include "USBDevice_Types.h" #include "USBDevice.h" class USBCDC: public USBDevice { public: /* * Constructor * * @param vendor_id Your vendor_id * @param product_id Your product_id * @param product_release Your preoduct_release * @param connect_blocking define if the connection must be blocked if USB not plugged in */ USBCDC(uint16_t vendor_id, uint16_t product_id, uint16_t product_release, bool connect_blocking); protected: /* * Get device descriptor. Warning: this method has to store the length of the report descriptor in reportLength. * * @returns pointer to the device descriptor */ virtual uint8_t * deviceDesc(); /* * Get string product descriptor * * @returns pointer to the string product descriptor */ virtual uint8_t * stringIproductDesc(); /* * Get string interface descriptor * * @returns pointer to the string interface descriptor */ virtual uint8_t * stringIinterfaceDesc(); /* * Get configuration descriptor * * @returns pointer to the configuration descriptor */ virtual uint8_t * configurationDesc(); /* * Send a buffer * * @param endpoint endpoint which will be sent the buffer * @param buffer buffer to be sent * @param size length of the buffer * @returns true if successful */ bool send(uint8_t * buffer, uint32_t size); /* * Read a buffer from a certain endpoint. Warning: blocking * * @param endpoint endpoint to read * @param buffer buffer where will be stored bytes * @param size the number of bytes read will be stored in *size * @param maxSize the maximum length that can be read * @returns true if successful */ bool readEP(uint8_t * buffer, uint32_t * size); /* * Read a buffer from a certain endpoint. Warning: non blocking * * @param endpoint endpoint to read * @param buffer buffer where will be stored bytes * @param size the number of bytes read will be stored in *size * @param maxSize the maximum length that can be read * @returns true if successful */ bool readEP_NB(uint8_t * buffer, uint32_t * size); /* * Called by USBCallback_requestCompleted when CDC line coding is changed * Warning: Called in ISR * * @param baud The baud rate * @param bits The number of bits in a word (5-8) * @param parity The parity * @param stop The number of stop bits (1 or 2) */ virtual void lineCodingChanged(int baud, int bits, int parity, int stop) {}; protected: virtual bool USBCallback_request(); virtual void USBCallback_requestCompleted(uint8_t *buf, uint32_t length); virtual bool USBCallback_setConfiguration(uint8_t configuration); volatile bool terminal_connected; }; #endif