mirror of
https://github.com/trabucayre/openFPGALoader.git
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89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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/*
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* Copyright (C) 2020 Gwenhael Goavec-Merou <[email protected]>
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*/
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#ifndef SRC_DIRTYJTAG_HPP_
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#define SRC_DIRTYJTAG_HPP_
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#include <libusb.h>
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#include "jtagInterface.hpp"
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/*!
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* \file dirtyJtag.hpp
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* \class DirtyJtag
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* \brief concrete class between jtag implementation and DirtyJTAG probe
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* \author Gwenhael Goavec-Merou
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*/
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class DirtyJtag : public JtagInterface {
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public:
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DirtyJtag(uint32_t clkHz, int8_t verbose, uint16_t vid = 0x1209, uint16_t pid = 0xC0CA);
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virtual ~DirtyJtag();
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int setClkFreq(uint32_t clkHz) override;
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/*!
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* \brief drive TMS to move in JTAG state machine
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* \param tms serie of TMS state
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* \param len number of TMS state
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* \param flush_buffer force flushing the buffer
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* \param tdi TDI constant value
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* \return number of state written
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*/
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int writeTMS(const uint8_t *tms, uint32_t len, bool flush_buffer, const uint8_t tdi = 1) override;
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/*!
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* \brief send TDI bits (mainly in shift DR/IR state)
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* \param tx array of TDI values (used to write)
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* \param rx array of TDO values (used when read)
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* \param len number of bit to send/receive
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* \param end in JTAG state machine last bit and tms are set in same time
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* \return number of bit written and/or read
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*/
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int writeTDI(const uint8_t *tx, uint8_t *rx, uint32_t len, bool end) override;
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/*!
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* \brief toggle clock with static tms and tdi
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* \param tms state of tms signal
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* \param tdo state of tdo signal
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* \param clk_len number of clock cycle
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* \return number of clock cycle send
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*/
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int toggleClk(uint8_t tms, uint8_t tdo, uint32_t clk_len) override;
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/*!
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* \brief return internal buffer size (in byte).
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* \return _buffer_size divided by 2 (two byte for clk) and divided by 8 (one
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* state == one byte)
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*/
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int get_buffer_size() override { return 0; }
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bool isFull() override { return false; }
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int flush() override;
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/* read gpio */
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uint8_t gpio_get();
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/* update selected gpio */
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bool gpio_set(uint8_t gpio);
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bool gpio_clear(uint8_t gpio);
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private:
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int8_t _verbose;
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int sendBitBang(uint8_t mask, uint8_t val, uint8_t *read, bool last);
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bool getVersion();
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bool _set_gpio_level(uint8_t gpio, uint8_t val);
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/* USB */
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void close_usb();
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libusb_device_handle *dev_handle;
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libusb_context *usb_ctx;
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uint8_t _tdi;
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uint8_t _tms;
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uint8_t _version;
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};
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#endif // SRC_DIRTYJTAG_HPP_
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