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

Dependencies:   USBDevice mbed

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。

Revision:
0:f1ecca559ec3
diff -r 000000000000 -r f1ecca559ec3 USBDevice/USBSerial/USBCDC.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/USBDevice/USBSerial/USBCDC.h	Fri Aug 29 08:33:17 2014 +0000
@@ -0,0 +1,123 @@
+/* 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