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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。
Diff: USBDevice/USBMSD/USBMSD.h
- Revision:
- 0:f1ecca559ec3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/USBDevice/USBMSD/USBMSD.h Fri Aug 29 08:33:17 2014 +0000 @@ -0,0 +1,249 @@ +/* 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 USBMSD_H +#define USBMSD_H + +/* These headers are included for child class. */ +#include "USBEndpoints.h" +#include "USBDescriptor.h" +#include "USBDevice_Types.h" + +#include "USBDevice.h" + +/** + * USBMSD class: generic class in order to use all kinds of blocks storage chip + * + * Introduction + * + * The USBMSD implements the MSD protocol. It permits to access a memory chip (flash, sdcard,...) + * from a computer over USB. But this class doesn't work standalone, you need to subclass this class + * and define virtual functions which are called in USBMSD. + * + * How to use this class with your chip ? + * + * You have to inherit and define some pure virtual functions (mandatory step): + * - virtual int disk_read(char * data, int block): function to read a block + * - virtual int disk_write(const char * data, int block): function to write a block + * - virtual int disk_initialize(): function to initialize the memory + * - virtual int disk_sectors(): return the number of blocks + * - virtual int disk_size(): return the memory size + * - virtual int disk_status(): return the status of the storage chip (0: OK, 1: not initialized, 2: no medium in the drive, 4: write protection) + * + * All functions names are compatible with the fat filesystem library. So you can imagine using your own class with + * USBMSD and the fat filesystem library in the same program. Just be careful because there are two different parts which + * will access the sd card. You can do a master/slave system using the disk_status method. + * + * Once these functions defined, you can call connect() (at the end of the constructor of your class for instance) + * of USBMSD to connect your mass storage device. connect() will first call disk_status() to test the status of the disk. + * If disk_status() returns 1 (disk not initialized), then disk_initialize() is called. After this step, connect() will collect information + * such as the number of blocks and the memory size. + */ +class USBMSD: public USBDevice { +public: + + /** + * Constructor + * + * @param vendor_id Your vendor_id + * @param product_id Your product_id + * @param product_release Your preoduct_release + */ + USBMSD(uint16_t vendor_id = 0x0703, uint16_t product_id = 0x0104, uint16_t product_release = 0x0001); + + /** + * Connect the USB MSD device. Establish disk initialization before really connect the device. + * + * @param blocking if not configured + * @returns true if successful + */ + bool connect(bool blocking = true); + + /** + * Disconnect the USB MSD device. + */ + void disconnect(); + + /** + * Destructor + */ + ~USBMSD(); + +protected: + + /* + * read a block on a storage chip + * + * @param data pointer where will be stored read data + * @param block block number + * @returns 0 if successful + */ + virtual int disk_read(uint8_t * data, uint64_t block) = 0; + + /* + * write a block on a storage chip + * + * @param data data to write + * @param block block number + * @returns 0 if successful + */ + virtual int disk_write(const uint8_t * data, uint64_t block) = 0; + + /* + * Disk initilization + */ + virtual int disk_initialize() = 0; + + /* + * Return the number of blocks + * + * @returns number of blocks + */ + virtual uint64_t disk_sectors() = 0; + + /* + * Return memory size + * + * @returns memory size + */ + virtual uint64_t disk_size() = 0; + + + /* + * To check the status of the storage chip + * + * @returns status: 0: OK, 1: disk not initialized, 2: no medium in the drive, 4: write protected + */ + virtual int disk_status() = 0; + + /* + * 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(); + + /* + * Callback called when a packet is received + */ + virtual bool EP2_OUT_callback(); + + /* + * Callback called when a packet has been sent + */ + virtual bool EP2_IN_callback(); + + /* + * Set configuration of device. Add endpoints + */ + virtual bool USBCallback_setConfiguration(uint8_t configuration); + + /* + * Callback called to process class specific requests + */ + virtual bool USBCallback_request(); + + +private: + + // MSC Bulk-only Stage + enum Stage { + READ_CBW, // wait a CBW + ERROR, // error + PROCESS_CBW, // process a CBW request + SEND_CSW, // send a CSW + WAIT_CSW, // wait that a CSW has been effectively sent + }; + + // Bulk-only CBW + typedef struct { + uint32_t Signature; + uint32_t Tag; + uint32_t DataLength; + uint8_t Flags; + uint8_t LUN; + uint8_t CBLength; + uint8_t CB[16]; + } PACKED CBW; + + // Bulk-only CSW + typedef struct { + uint32_t Signature; + uint32_t Tag; + uint32_t DataResidue; + uint8_t Status; + } PACKED CSW; + + //state of the bulk-only state machine + Stage stage; + + // current CBW + CBW cbw; + + // CSW which will be sent + CSW csw; + + // addr where will be read or written data + uint32_t addr; + + // length of a reading or writing + uint32_t length; + + // memory OK (after a memoryVerify) + bool memOK; + + // cache in RAM before writing in memory. Useful also to read a block. + uint8_t * page; + + int BlockSize; + uint64_t MemorySize; + uint64_t BlockCount; + + void CBWDecode(uint8_t * buf, uint16_t size); + void sendCSW (void); + bool inquiryRequest (void); + bool write (uint8_t * buf, uint16_t size); + bool readFormatCapacity(); + bool readCapacity (void); + bool infoTransfer (void); + void memoryRead (void); + bool modeSense6 (void); + void testUnitReady (void); + bool requestSense (void); + void memoryVerify (uint8_t * buf, uint16_t size); + void memoryWrite (uint8_t * buf, uint16_t size); + void reset(); + void fail(); +}; + +#endif