66 lines
1.6 KiB
C++
66 lines
1.6 KiB
C++
// SPDX-License-Identifier: Apache-2.0
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/*
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* Copyright (C) 2020-2022 Gwenhael Goavec-Merou <gwenhael.goavec-merou@trabucayre.com>
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* Copyright (C) 2022 Niklas Ekström <mail@niklasekstrom.nu>
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*
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* libgpiod bitbang driver added by Niklas Ekström <mail@niklasekstrom.nu> in 2022
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*/
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#ifndef LIBGPIODBITBANG_H
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#define LIBGPIODBITBANG_H
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#include <string>
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#include "board.hpp"
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#include "jtagInterface.hpp"
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/*!
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* \file LibgpiodJtagBitbang.hpp
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* \class LibgpiodJtagBitbang
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* \brief concrete class between jtag implementation and gpio bitbang
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* \author Niklas Ekström
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*/
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struct gpiod_chip;
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struct gpiod_line;
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class LibgpiodJtagBitbang : public JtagInterface {
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public:
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LibgpiodJtagBitbang(const jtag_pins_conf_t *pin_conf,
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const std::string &dev, uint32_t clkHZ, uint8_t verbose);
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virtual ~LibgpiodJtagBitbang();
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int setClkFreq(uint32_t clkHZ) override;
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int writeTMS(uint8_t *tms_buf, uint32_t len, bool flush_buffer) override;
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int writeTDI(uint8_t *tx, uint8_t *rx, uint32_t len, bool end) override;
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int toggleClk(uint8_t tms, uint8_t tdo, uint32_t clk_len) override;
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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 { return 0; }
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private:
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gpiod_line *get_line(unsigned int offset, int val, int dir);
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int update_pins(int tck, int tms, int tdi);
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int read_tdo();
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bool _verbose;
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int _tck_pin;
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int _tms_pin;
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int _tdo_pin;
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int _tdi_pin;
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gpiod_chip *_chip;
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gpiod_line *_tck_line;
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gpiod_line *_tms_line;
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gpiod_line *_tdo_line;
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gpiod_line *_tdi_line;
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int _curr_tms;
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int _curr_tdi;
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int _curr_tck;
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};
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#endif
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