///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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//
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//
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// Filename: devbus.h
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// Filename: devbus.h
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//
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//
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// Project: UART to WISHBONE FPGA library
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// Project: UART to WISHBONE FPGA library
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//
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//
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// Purpose: The purpose of this file is to document an interface which
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// Purpose: The purpose of this file is to document an interface which
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// any devic with a bus, whether it be implemented over a UART,
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// any devic with a bus, whether it be implemented over a UART,
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// an ethernet, or a PCI express bus, must implement. This
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// an ethernet, or a PCI express bus, must implement. This
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// describes only an interface, and not how that interface is
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// describes only an interface, and not how that interface is
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// to be accomplished.
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// to be accomplished.
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//
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//
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// Creator: Dan Gisselquist
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// Creator: Dan Gisselquist
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// Gisselquist Tecnology, LLC
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// Gisselquist Technology, LLC
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//
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//
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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//
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//
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// Copyright (C) 2015, Gisselquist Technology, LLC
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// Copyright (C) 2015, Gisselquist Technology, LLC
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//
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//
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// This program is free software (firmware): you can redistribute it and/or
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// This program is free software (firmware): you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as published
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// modify it under the terms of the GNU General Public License as published
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// by the Free Software Foundation, either version 3 of the License, or (at
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// by the Free Software Foundation, either version 3 of the License, or (at
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// your option) any later version.
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// your option) any later version.
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//
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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// for more details.
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// for more details.
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//
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//
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// License: GPL, v3, as defined and found on www.gnu.org,
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// License: GPL, v3, as defined and found on www.gnu.org,
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// http://www.gnu.org/licenses/gpl.html
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// http://www.gnu.org/licenses/gpl.html
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//
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//
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//
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//
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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//
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//
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//
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//
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#ifndef DEVBUS_H
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#ifndef DEVBUS_H
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#define DEVBUS_H
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#define DEVBUS_H
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#include <unistd.h>
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#include <unistd.h>
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typedef unsigned int uint32;
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typedef unsigned int uint32;
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class BUSERR {
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class BUSERR {
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public:
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public:
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uint32 addr;
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uint32 addr;
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BUSERR(const uint32 a) : addr(a) {};
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BUSERR(const uint32 a) : addr(a) {};
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};
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};
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class DEVBUS {
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class DEVBUS {
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public:
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public:
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typedef uint32 BUSW;
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typedef uint32 BUSW;
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virtual void kill(void) = 0;
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virtual void kill(void) = 0;
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virtual void close(void) = 0;
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virtual void close(void) = 0;
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// Write a single value to a single address
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// Write a single value to a single address
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virtual void writeio(const BUSW a, const BUSW v) = 0;
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virtual void writeio(const BUSW a, const BUSW v) = 0;
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// Read a single value to a single address
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// Read a single value to a single address
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virtual BUSW readio(const BUSW a) = 0;
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virtual BUSW readio(const BUSW a) = 0;
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// Read a series of values from values from a block of memory
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// Read a series of values from values from a block of memory
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virtual void readi(const BUSW a, const int len, BUSW *buf) = 0;
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virtual void readi(const BUSW a, const int len, BUSW *buf) = 0;
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// Read a series of values from the same address in memory
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// Read a series of values from the same address in memory
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virtual void readz(const BUSW a, const int len, BUSW *buf) = 0;
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virtual void readz(const BUSW a, const int len, BUSW *buf) = 0;
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virtual void writei(const BUSW a, const int len, const BUSW *buf) = 0;
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virtual void writei(const BUSW a, const int len, const BUSW *buf) = 0;
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virtual void writez(const BUSW a, const int len, const BUSW *buf) = 0;
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virtual void writez(const BUSW a, const int len, const BUSW *buf) = 0;
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// Query whether or not an interrupt has taken place
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// Query whether or not an interrupt has taken place
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virtual bool poll(void) = 0;
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virtual bool poll(void) = 0;
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// Sleep until interrupt, but sleep no longer than msec milliseconds
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// Sleep until interrupt, but sleep no longer than msec milliseconds
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virtual void usleep(unsigned msec) = 0;
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virtual void usleep(unsigned msec) = 0;
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// Sleep until an interrupt, no matter how long it takes for that
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// Sleep until an interrupt, no matter how long it takes for that
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// interrupt to take place
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// interrupt to take place
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virtual void wait(void) = 0;
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virtual void wait(void) = 0;
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// Query whether or not a bus error has taken place. This is somewhat
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// Query whether or not a bus error has taken place. This is somewhat
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// of a misnomer, as my current bus error detection code exits any
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// of a misnomer, as my current bus error detection code exits any
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// interface, but ... it is what it is.
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// interface, but ... it is what it is.
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virtual bool bus_err(void) const = 0;
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virtual bool bus_err(void) const = 0;
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// Clear any bus error condition.
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// Clear any bus error condition.
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virtual void reset_err(void) = 0;
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virtual void reset_err(void) = 0;
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// Clear any interrupt condition that has already been noticed by
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// Clear any interrupt condition that has already been noticed by
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// the interface, does not check for further interrupt
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// the interface, does not check for further interrupt
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virtual void clear(void) = 0;
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virtual void clear(void) = 0;
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};
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};
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#endif
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#endif
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