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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/USBHID/USBHID.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 USB_HID_H #define USB_HID_H /* These headers are included for child class. */ #include "USBEndpoints.h" #include "USBDescriptor.h" #include "USBDevice_Types.h" #include "USBHID_Types.h" #include "USBDevice.h" /** * USBHID example * @code * #include "mbed.h" * #include "USBHID.h" * * USBHID hid; * HID_REPORT recv; * BusOut leds(LED1,LED2,LED3,LED4); * * int main(void) { * while (1) { * hid.read(&recv); * leds = recv.data[0]; * } * } * @endcode */ class USBHID: public USBDevice { public: /** * Constructor * * @param output_report_length Maximum length of a sent report (up to 64 bytes) (default: 64 bytes) * @param input_report_length Maximum length of a received report (up to 64 bytes) (default: 64 bytes) * @param vendor_id Your vendor_id * @param product_id Your product_id * @param product_release Your preoduct_release * @param connect Connect the device */ USBHID(uint8_t output_report_length = 64, uint8_t input_report_length = 64, uint16_t vendor_id = 0x1234, uint16_t product_id = 0x0006, uint16_t product_release = 0x0001, bool connect = true); /** * Send a Report. warning: blocking * * @param report Report which will be sent (a report is defined by all data and the length) * @returns true if successful */ bool send(HID_REPORT *report); /** * Send a Report. warning: non blocking * * @param report Report which will be sent (a report is defined by all data and the length) * @returns true if successful */ bool sendNB(HID_REPORT *report); /** * Read a report: blocking * * @param report pointer to the report to fill * @returns true if successful */ bool read(HID_REPORT * report); /** * Read a report: non blocking * * @param report pointer to the report to fill * @returns true if successful */ bool readNB(HID_REPORT * report); protected: uint16_t reportLength; /* * Get the Report descriptor * * @returns pointer to the report descriptor */ virtual uint8_t * reportDesc(); /* * Get the length of the report descriptor * * @returns the length of the report descriptor */ virtual uint16_t reportDescLength(); /* * 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(); /* * HID Report received by SET_REPORT request. Warning: Called in ISR context * First byte of data will be the report ID * * @param report Data and length received */ virtual void HID_callbackSetReport(HID_REPORT *report){}; /* * Called by USBDevice on Endpoint0 request. Warning: Called in ISR context * This is used to handle extensions to standard requests * and class specific requests * * @returns true if class handles this request */ virtual bool USBCallback_request(); /* * Called by USBDevice layer. Set configuration of the device. * For instance, you can add all endpoints that you need on this function. * * @param configuration Number of the configuration * @returns true if class handles this request */ virtual bool USBCallback_setConfiguration(uint8_t configuration); private: HID_REPORT outputReport; uint8_t output_length; uint8_t input_length; }; #endif